pkg/analyzer/test/generated/resolver_test.dart

// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

library engine.resolver_test;

import 'dart:collection';
import 'package:analyzer/src/generated/java_core.dart';
import 'package:analyzer/src/generated/java_junit.dart';
import 'package:analyzer/src/generated/java_engine.dart';
import 'package:analyzer/src/generated/java_engine_io.dart';
import 'package:analyzer/src/generated/source_io.dart';
import 'package:analyzer/src/generated/error.dart';
import 'package:analyzer/src/generated/scanner.dart';
import 'package:analyzer/src/generated/ast.dart';
import 'package:analyzer/src/generated/parser.dart' show ParserErrorCode;
import 'package:analyzer/src/generated/element.dart';
import 'package:analyzer/src/generated/resolver.dart';
import 'package:analyzer/src/generated/engine.dart';
import 'package:analyzer/src/generated/utilities_dart.dart';
import 'package:analyzer/src/generated/sdk.dart';
import 'package:analyzer/src/generated/sdk_io.dart' show DirectoryBasedDartSdk;
import 'package:unittest/unittest.dart' as _ut;
import 'test_support.dart';
import 'package:analyzer/src/generated/testing/ast_factory.dart';
import 'package:analyzer/src/generated/testing/element_factory.dart';
import 'package:analyzer/src/generated/java_io.dart';
import '../reflective_tests.dart';


/**
 * The class `AnalysisContextFactory` defines utility methods used to create analysis contexts
 * for testing purposes.
 */
class AnalysisContextFactory {
  static String _DART_MATH = "dart:math";

  static String _DART_INTERCEPTORS = "dart:_interceptors";

  static String _DART_JS_HELPER = "dart:_js_helper";

  /**
   * The fake SDK used by all of the contexts created by this factory.
   */
  static DirectoryBasedDartSdk _FAKE_SDK;

  /**
   * Create an analysis context that has a fake core library already resolved.
   *
   * @return the analysis context that was created
   */
  static AnalysisContextImpl contextWithCore() {
    AnalysisContextForTests context = new AnalysisContextForTests();
    return initContextWithCore(context);
  }

  /**
   * Create an analysis context that uses the given options and has a fake core library already
   * resolved.
   *
   * @param options the options to be applied to the context
   * @return the analysis context that was created
   */
  static AnalysisContextImpl contextWithCoreAndOptions(AnalysisOptions options) {
    AnalysisContextForTests context = new AnalysisContextForTests();
    context._internalSetAnalysisOptions(options);
    return initContextWithCore(context);
  }

  /**
   * Initialize the given analysis context with a fake core library already resolved.
   *
   * @param context the context to be initialized (not `null`)
   * @return the analysis context that was created
   */
  static AnalysisContextImpl initContextWithCore(AnalysisContextImpl context) {
    DirectoryBasedDartSdk sdk = new DirectoryBasedDartSdk_AnalysisContextFactory_initContextWithCore(new JavaFile("/fake/sdk"));
    SourceFactory sourceFactory = new SourceFactory([new DartUriResolver(sdk), new FileUriResolver()]);
    context.sourceFactory = sourceFactory;
    AnalysisContext coreContext = sdk.context;
    //
    // dart:core
    //
    TestTypeProvider provider = new TestTypeProvider();
    CompilationUnitElementImpl coreUnit = new CompilationUnitElementImpl("core.dart");
    Source coreSource = sourceFactory.forUri(DartSdk.DART_CORE);
    coreContext.setContents(coreSource, "");
    coreUnit.source = coreSource;
    ClassElementImpl proxyClassElement = ElementFactory.classElement2("_Proxy", []);
    coreUnit.types = <ClassElement> [
        provider.boolType.element,
        provider.deprecatedType.element,
        provider.doubleType.element,
        provider.functionType.element,
        provider.intType.element,
        provider.listType.element,
        provider.mapType.element,
        provider.nullType.element,
        provider.numType.element,
        provider.objectType.element,
        proxyClassElement,
        provider.stackTraceType.element,
        provider.stringType.element,
        provider.symbolType.element,
        provider.typeType.element];
    coreUnit.functions = <FunctionElement> [ElementFactory.functionElement3("identical", provider.boolType.element, <ClassElement> [provider.objectType.element, provider.objectType.element], null)];
    TopLevelVariableElement proxyTopLevelVariableElt = ElementFactory.topLevelVariableElement3("proxy", true, false, proxyClassElement.type);
    TopLevelVariableElement deprecatedTopLevelVariableElt = ElementFactory.topLevelVariableElement3("deprecated", true, false, provider.deprecatedType);
    coreUnit.accessors = <PropertyAccessorElement> [
        proxyTopLevelVariableElt.getter,
        proxyTopLevelVariableElt.setter,
        deprecatedTopLevelVariableElt.getter,
        deprecatedTopLevelVariableElt.setter];
    coreUnit.topLevelVariables = <TopLevelVariableElement> [proxyTopLevelVariableElt, deprecatedTopLevelVariableElt];
    LibraryElementImpl coreLibrary = new LibraryElementImpl.forNode(coreContext, AstFactory.libraryIdentifier2(["dart", "core"]));
    coreLibrary.definingCompilationUnit = coreUnit;
    //
    // dart:async
    //
    CompilationUnitElementImpl asyncUnit = new CompilationUnitElementImpl("async.dart");
    Source asyncSource = sourceFactory.forUri(DartSdk.DART_ASYNC);
    coreContext.setContents(asyncSource, "");
    asyncUnit.source = asyncSource;
    // Future
    ClassElementImpl futureElement = ElementFactory.classElement2("Future", ["T"]);
    InterfaceType futureType = futureElement.type;
    //   factory Future.value([value])
    ConstructorElementImpl futureConstructor = ElementFactory.constructorElement2(futureElement, "value", []);
    futureConstructor.parameters = <ParameterElement> [ElementFactory.positionalParameter2("value", provider.dynamicType)];
    futureConstructor.factory = true;
    (futureConstructor.type as FunctionTypeImpl).typeArguments = futureElement.type.typeArguments;
    futureElement.constructors = <ConstructorElement> [futureConstructor];
    //   Future then(onValue(T value), { Function onError });
    List<ParameterElement> parameters = <ParameterElement> [ElementFactory.requiredParameter2("value", futureElement.typeParameters[0].type)];
    FunctionTypeAliasElementImpl aliasElement = new FunctionTypeAliasElementImpl.forNode(null);
    aliasElement.synthetic = true;
    aliasElement.shareParameters(parameters);
    aliasElement.returnType = provider.dynamicType;
    FunctionTypeImpl aliasType = new FunctionTypeImpl.con2(aliasElement);
    aliasElement.shareTypeParameters(futureElement.typeParameters);
    aliasType.typeArguments = futureElement.type.typeArguments;
    MethodElement thenMethod = ElementFactory.methodElementWithParameters("then", futureElement.type.typeArguments, futureType, [
        ElementFactory.requiredParameter2("onValue", aliasType),
        ElementFactory.namedParameter2("onError", provider.functionType)]);
    futureElement.methods = <MethodElement> [thenMethod];
    // Completer
    ClassElementImpl completerElement = ElementFactory.classElement2("Completer", ["T"]);
    ConstructorElementImpl completerConstructor = ElementFactory.constructorElement2(completerElement, null, []);
    (completerConstructor.type as FunctionTypeImpl).typeArguments = completerElement.type.typeArguments;
    completerElement.constructors = <ConstructorElement> [completerConstructor];
    asyncUnit.types = <ClassElement> [
        completerElement,
        futureElement,
        ElementFactory.classElement2("Stream", ["T"])];
    LibraryElementImpl asyncLibrary = new LibraryElementImpl.forNode(coreContext, AstFactory.libraryIdentifier2(["dart", "async"]));
    asyncLibrary.definingCompilationUnit = asyncUnit;
    //
    // dart:html
    //
    CompilationUnitElementImpl htmlUnit = new CompilationUnitElementImpl("html_dartium.dart");
    Source htmlSource = sourceFactory.forUri(DartSdk.DART_HTML);
    coreContext.setContents(htmlSource, "");
    htmlUnit.source = htmlSource;
    ClassElementImpl elementElement = ElementFactory.classElement2("Element", []);
    InterfaceType elementType = elementElement.type;
    ClassElementImpl canvasElement = ElementFactory.classElement("CanvasElement", elementType, []);
    ClassElementImpl contextElement = ElementFactory.classElement2("CanvasRenderingContext", []);
    InterfaceType contextElementType = contextElement.type;
    ClassElementImpl context2dElement = ElementFactory.classElement("CanvasRenderingContext2D", contextElementType, []);
    canvasElement.methods = <MethodElement> [ElementFactory.methodElement("getContext", contextElementType, [provider.stringType])];
    canvasElement.accessors = <PropertyAccessorElement> [ElementFactory.getterElement("context2D", false, context2dElement.type)];
    ClassElementImpl documentElement = ElementFactory.classElement("Document", elementType, []);
    ClassElementImpl htmlDocumentElement = ElementFactory.classElement("HtmlDocument", documentElement.type, []);
    htmlDocumentElement.methods = <MethodElement> [ElementFactory.methodElement("query", elementType, <DartType> [provider.stringType])];
    htmlUnit.types = <ClassElement> [
        ElementFactory.classElement("AnchorElement", elementType, []),
        ElementFactory.classElement("BodyElement", elementType, []),
        ElementFactory.classElement("ButtonElement", elementType, []),
        canvasElement,
        contextElement,
        context2dElement,
        ElementFactory.classElement("DivElement", elementType, []),
        documentElement,
        elementElement,
        htmlDocumentElement,
        ElementFactory.classElement("InputElement", elementType, []),
        ElementFactory.classElement("SelectElement", elementType, [])];
    htmlUnit.functions = <FunctionElement> [ElementFactory.functionElement3("query", elementElement, <ClassElement> [provider.stringType.element], ClassElementImpl.EMPTY_ARRAY)];
    TopLevelVariableElementImpl document = ElementFactory.topLevelVariableElement3("document", false, true, htmlDocumentElement.type);
    htmlUnit.topLevelVariables = <TopLevelVariableElement> [document];
    htmlUnit.accessors = <PropertyAccessorElement> [document.getter];
    LibraryElementImpl htmlLibrary = new LibraryElementImpl.forNode(coreContext, AstFactory.libraryIdentifier2(["dart", "dom", "html"]));
    htmlLibrary.definingCompilationUnit = htmlUnit;
    //
    // dart:math
    //
    CompilationUnitElementImpl mathUnit = new CompilationUnitElementImpl("math.dart");
    Source mathSource = sourceFactory.forUri(_DART_MATH);
    coreContext.setContents(mathSource, "");
    mathUnit.source = mathSource;
    FunctionElement cosElement = ElementFactory.functionElement3("cos", provider.doubleType.element, <ClassElement> [provider.numType.element], <ClassElement> []);
    TopLevelVariableElement ln10Element = ElementFactory.topLevelVariableElement3("LN10", true, false, provider.doubleType);
    TopLevelVariableElement piElement = ElementFactory.topLevelVariableElement3("PI", true, false, provider.doubleType);
    ClassElementImpl randomElement = ElementFactory.classElement2("Random", []);
    randomElement.abstract = true;
    ConstructorElementImpl randomConstructor = ElementFactory.constructorElement2(randomElement, null, []);
    randomConstructor.factory = true;
    ParameterElementImpl seedParam = new ParameterElementImpl("seed", 0);
    seedParam.parameterKind = ParameterKind.POSITIONAL;
    seedParam.type = provider.intType;
    randomConstructor.parameters = <ParameterElement> [seedParam];
    randomElement.constructors = <ConstructorElement> [randomConstructor];
    FunctionElement sinElement = ElementFactory.functionElement3("sin", provider.doubleType.element, <ClassElement> [provider.numType.element], <ClassElement> []);
    FunctionElement sqrtElement = ElementFactory.functionElement3("sqrt", provider.doubleType.element, <ClassElement> [provider.numType.element], <ClassElement> []);
    mathUnit.accessors = <PropertyAccessorElement> [ln10Element.getter, piElement.getter];
    mathUnit.functions = <FunctionElement> [cosElement, sinElement, sqrtElement];
    mathUnit.topLevelVariables = <TopLevelVariableElement> [ln10Element, piElement];
    mathUnit.types = <ClassElement> [randomElement];
    LibraryElementImpl mathLibrary = new LibraryElementImpl.forNode(coreContext, AstFactory.libraryIdentifier2(["dart", "math"]));
    mathLibrary.definingCompilationUnit = mathUnit;
    //
    // Set empty sources for the rest of the libraries.
    //
    Source source = sourceFactory.forUri(_DART_INTERCEPTORS);
    coreContext.setContents(source, "");
    source = sourceFactory.forUri(_DART_JS_HELPER);
    coreContext.setContents(source, "");
    //
    // Record the elements.
    //
    HashMap<Source, LibraryElement> elementMap = new HashMap<Source, LibraryElement>();
    elementMap[coreSource] = coreLibrary;
    elementMap[asyncSource] = asyncLibrary;
    elementMap[htmlSource] = htmlLibrary;
    elementMap[mathSource] = mathLibrary;
    context.recordLibraryElements(elementMap);
    return context;
  }
}

/**
 * Instances of the class `AnalysisContextForTests` implement an analysis context that has a
 * fake SDK that is much smaller and faster for testing purposes.
 */
class AnalysisContextForTests extends AnalysisContextImpl {
  @override
  bool exists(Source source) => super.exists(source) || sourceFactory.dartSdk.context.exists(source);

  @override
  TimestampedData<String> getContents(Source source) {
    if (source.isInSystemLibrary) {
      return sourceFactory.dartSdk.context.getContents(source);
    }
    return super.getContents(source);
  }

  @override
  int getModificationStamp(Source source) {
    if (source.isInSystemLibrary) {
      return sourceFactory.dartSdk.context.getModificationStamp(source);
    }
    return super.getModificationStamp(source);
  }

  @override
  void set analysisOptions(AnalysisOptions options) {
    AnalysisOptions currentOptions = analysisOptions;
    bool needsRecompute = currentOptions.analyzeFunctionBodies != options.analyzeFunctionBodies || currentOptions.generateSdkErrors != options.generateSdkErrors || currentOptions.enableAsync != options.enableAsync || currentOptions.enableDeferredLoading != options.enableDeferredLoading || currentOptions.enableEnum != options.enableEnum || currentOptions.dart2jsHint != options.dart2jsHint || (currentOptions.hint && !options.hint) || currentOptions.preserveComments != options.preserveComments;
    if (needsRecompute) {
      JUnitTestCase.fail("Cannot set options that cause the sources to be reanalyzed in a test context");
    }
    super.analysisOptions = options;
  }

  /**
   * Set the analysis options, even if they would force re-analysis. This method should only be
   * invoked before the fake SDK is initialized.
   *
   * @param options the analysis options to be set
   */
  void _internalSetAnalysisOptions(AnalysisOptions options) {
    super.analysisOptions = options;
  }
}

/**
 * Helper for creating and managing single [AnalysisContext].
 */
class AnalysisContextHelper {
  AnalysisContext context;

  /**
   * Creates new [AnalysisContext] using [AnalysisContextFactory#contextWithCore].
   */
  AnalysisContextHelper() {
    context = AnalysisContextFactory.contextWithCore();
    AnalysisOptionsImpl options = new AnalysisOptionsImpl.con1(context.analysisOptions);
    options.cacheSize = 256;
    context.analysisOptions = options;
  }

  Source addSource(String path, String code) {
    Source source = new FileBasedSource.con1(FileUtilities2.createFile(path));
    if (path.endsWith(".dart") || path.endsWith(".html")) {
      ChangeSet changeSet = new ChangeSet();
      changeSet.addedSource(source);
      context.applyChanges(changeSet);
    }
    context.setContents(source, code);
    return source;
  }

  CompilationUnitElement getDefiningUnitElement(Source source) => context.getCompilationUnitElement(source, source);

  CompilationUnit resolveDefiningUnit(Source source) {
    LibraryElement libraryElement = context.computeLibraryElement(source);
    return context.resolveCompilationUnit(source, libraryElement);
  }

  void runTasks() {
    AnalysisResult result = context.performAnalysisTask();
    while (result.changeNotices != null) {
      result = context.performAnalysisTask();
    }
  }
}

class AnalysisDeltaTest extends EngineTestCase {
  TestSource source1 = new TestSource('/1.dart');
  TestSource source2 = new TestSource('/2.dart');
  TestSource source3 = new TestSource('/3.dart');

  void test_getAddedSources() {
    AnalysisDelta delta = new AnalysisDelta();
    delta.setAnalysisLevel(source1, AnalysisLevel.ALL);
    delta.setAnalysisLevel(source2, AnalysisLevel.ERRORS);
    delta.setAnalysisLevel(source3, AnalysisLevel.NONE);
    List<Source> addedSources = delta.addedSources;
    EngineTestCase.assertLength(2, addedSources);
    EngineTestCase.assertContains(addedSources, [source1, source2]);
  }

  void test_getAnalysisLevels() {
    AnalysisDelta delta = new AnalysisDelta();
    JUnitTestCase.assertEquals(0, delta.analysisLevels.length);
  }

  void test_setAnalysisLevel() {
    AnalysisDelta delta = new AnalysisDelta();
    delta.setAnalysisLevel(source1, AnalysisLevel.ALL);
    delta.setAnalysisLevel(source2, AnalysisLevel.ERRORS);
    Map<Source, AnalysisLevel> levels = delta.analysisLevels;
    JUnitTestCase.assertEquals(2, levels.length);
    JUnitTestCase.assertEquals(AnalysisLevel.ALL, levels[source1]);
    JUnitTestCase.assertEquals(AnalysisLevel.ERRORS, levels[source2]);
  }

  void test_toString() {
    AnalysisDelta delta = new AnalysisDelta();
    delta.setAnalysisLevel(new TestSource(), AnalysisLevel.ALL);
    String result = delta.toString();
    JUnitTestCase.assertNotNull(result);
    JUnitTestCase.assertTrue(result.length > 0);
  }
}

class ChangeSetTest extends EngineTestCase {
  void test_changedContent() {
    TestSource source = new TestSource();
    String content = "";
    ChangeSet changeSet = new ChangeSet();
    changeSet.changedContent(source, content);
    EngineTestCase.assertSizeOfList(0, changeSet.addedSources);
    EngineTestCase.assertSizeOfList(0, changeSet.changedSources);
    Map<Source, String> map = changeSet.changedContents;
    EngineTestCase.assertSizeOfMap(1, map);
    JUnitTestCase.assertSame(content, map[source]);
    EngineTestCase.assertSizeOfMap(0, changeSet.changedRanges);
    EngineTestCase.assertSizeOfList(0, changeSet.deletedSources);
    EngineTestCase.assertSizeOfList(0, changeSet.removedSources);
    EngineTestCase.assertSizeOfList(0, changeSet.removedContainers);
  }

  void test_changedRange() {
    TestSource source = new TestSource();
    String content = "";
    ChangeSet changeSet = new ChangeSet();
    changeSet.changedRange(source, content, 1, 2, 3);
    EngineTestCase.assertSizeOfList(0, changeSet.addedSources);
    EngineTestCase.assertSizeOfList(0, changeSet.changedSources);
    EngineTestCase.assertSizeOfMap(0, changeSet.changedContents);
    Map<Source, ChangeSet_ContentChange> map = changeSet.changedRanges;
    EngineTestCase.assertSizeOfMap(1, map);
    ChangeSet_ContentChange change = map[source];
    JUnitTestCase.assertNotNull(change);
    JUnitTestCase.assertEquals(content, change.contents);
    JUnitTestCase.assertEquals(1, change.offset);
    JUnitTestCase.assertEquals(2, change.oldLength);
    JUnitTestCase.assertEquals(3, change.newLength);
    EngineTestCase.assertSizeOfList(0, changeSet.deletedSources);
    EngineTestCase.assertSizeOfList(0, changeSet.removedSources);
    EngineTestCase.assertSizeOfList(0, changeSet.removedContainers);
  }

  void test_toString() {
    ChangeSet changeSet = new ChangeSet();
    changeSet.addedSource(new TestSource());
    changeSet.changedSource(new TestSource());
    changeSet.changedContent(new TestSource(), "");
    changeSet.changedRange(new TestSource(), "", 0, 0, 0);
    changeSet.deletedSource(new TestSource());
    changeSet.removedSource(new TestSource());
    changeSet.removedContainer(new SourceContainer_ChangeSetTest_test_toString());
    JUnitTestCase.assertNotNull(changeSet.toString());
  }
}

class CheckedModeCompileTimeErrorCodeTest extends ResolverTestCase {
  void test_fieldFormalParameterAssignableToField_extends() {
    // According to checked-mode type checking rules, a value of type B is
    // assignable to a field of type A, because B extends A (and hence is a
    // subtype of A).
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  const A();",
        "}",
        "class B extends A {",
        "  const B();",
        "}",
        "class C {",
        "  final A a;",
        "  const C(this.a);",
        "}",
        "var v = const C(const B());"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_fieldFormalParameterAssignableToField_fieldType_unresolved_null() {
    // Null always passes runtime type checks, even when the type is
    // unresolved.
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  final Unresolved x;",
        "  const A(String this.x);",
        "}",
        "var v = const A(null);"]));
    resolve(source);
    assertErrors(source, [
        StaticWarningCode.UNDEFINED_CLASS]);
    verify([source]);
  }

  void test_fieldFormalParameterAssignableToField_implements() {
    // According to checked-mode type checking rules, a value of type B is
    // assignable to a field of type A, because B implements A (and hence is a
    // subtype of A).
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "class B implements A {",
        "  const B();",
        "}",
        "class C {",
        "  final A a;",
        "  const C(this.a);",
        "}",
        "var v = const C(const B());"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_fieldFormalParameterAssignableToField_list_dynamic() {
    // [1, 2, 3] has type List<dynamic>, which is a subtype of List<int>.
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  const A(List<int> x);",
        "}",
        "var x = const A(const [1, 2, 3]);"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_fieldFormalParameterAssignableToField_list_nonDynamic() {
    // <int>[1, 2, 3] has type List<int>, which is a subtype of List<num>.
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  const A(List<num> x);",
        "}",
        "var x = const A(const <int>[1, 2, 3]);"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_fieldFormalParameterAssignableToField_map_dynamic() {
    // {1: 2} has type Map<dynamic, dynamic>, which is a subtype of
    // Map<int, int>.
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  const A(Map<int, int> x);",
        "}",
        "var x = const A(const {1: 2});"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_fieldFormalParameterAssignableToField_map_keyDifferent() {
    // <int, int>{1: 2} has type Map<int, int>, which is a subtype of
    // Map<num, int>.
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  const A(Map<num, int> x);",
        "}",
        "var x = const A(const <int, int>{1: 2});"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_fieldFormalParameterAssignableToField_map_valueDifferent() {
    // <int, int>{1: 2} has type Map<int, int>, which is a subtype of
    // Map<int, num>.
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  const A(Map<int, num> x);",
        "}",
        "var x = const A(const <int, int>{1: 2});"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_fieldFormalParameterAssignableToField_notype() {
    // If a field is declared without a type, then any value may be assigned to
    // it.
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  final x;",
        "  const A(this.x);",
        "}",
        "var v = const A(5);"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_fieldFormalParameterAssignableToField_null() {
    // Null is assignable to anything.
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  final int x;",
        "  const A(this.x);",
        "}",
        "var v = const A(null);"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_fieldFormalParameterAssignableToField_typeSubstitution() {
    // foo has the runtime type dynamic -> dynamic, so it should be assignable
    // to A.f.
    Source source = addSource(EngineTestCase.createSource([
        "class A<T> {",
        "  final T x;",
        "  const A(this.x);",
        "}",
        "var v = const A<int>(3);"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_fieldFormalParameterAssignableToField_typedef() {
    // foo has the runtime type dynamic -> dynamic, so it should be assignable
    // to A.f.
    Source source = addSource(EngineTestCase.createSource([
        "typedef String Int2String(int x);",
        "class A {",
        "  final Int2String f;",
        "  const A(this.f);",
        "}",
        "foo(x) => 1;"
        "var v = const A(foo);"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_fieldFormalParameterNotAssignableToField() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  final int x;",
        "  const A(this.x);",
        "}",
        "var v = const A('foo');"]));
    resolve(source);
    assertErrors(source, [
        CheckedModeCompileTimeErrorCode.CONST_CONSTRUCTOR_PARAM_TYPE_MISMATCH,
        StaticWarningCode.ARGUMENT_TYPE_NOT_ASSIGNABLE]);
    verify([source]);
  }

  void test_fieldFormalParameterNotAssignableToField_fieldType() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  final int x;",
        "  const A(String this.x);",
        "}",
        "var v = const A('foo');"]));
    resolve(source);
    assertErrors(source, [
        CheckedModeCompileTimeErrorCode.CONST_CONSTRUCTOR_PARAM_TYPE_MISMATCH,
        StaticWarningCode.FIELD_INITIALIZING_FORMAL_NOT_ASSIGNABLE]);
    verify([source]);
  }

  void test_fieldFormalParameterNotAssignableToField_fieldType_unresolved() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  final Unresolved x;",
        "  const A(String this.x);",
        "}",
        "var v = const A('foo');"]));
    resolve(source);
    assertErrors(source, [
        CheckedModeCompileTimeErrorCode.CONST_CONSTRUCTOR_PARAM_TYPE_MISMATCH,
        StaticWarningCode.UNDEFINED_CLASS]);
    verify([source]);
  }

  void test_fieldFormalParameterNotAssignableToField_extends() {
    // According to checked-mode type checking rules, a value of type A is not
    // assignable to a field of type B, because B extends A (the subtyping
    // relationship is in the wrong direction).
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  const A();",
        "}",
        "class B extends A {",
        "  const B();",
        "}",
        "class C {",
        "  final B b;",
        "  const C(this.b);",
        "}",
        "var v = const C(const A());"]));
    resolve(source);
    assertErrors(source, [
        CheckedModeCompileTimeErrorCode.CONST_CONSTRUCTOR_PARAM_TYPE_MISMATCH]);
    verify([source]);
  }

  void test_fieldFormalParameterNotAssignableToField_implements() {
    // According to checked-mode type checking rules, a value of type A is not
    // assignable to a field of type B, because B implements A (the subtyping
    // relationship is in the wrong direction).
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  const A();",
        "}",
        "class B implements A {}",
        "class C {",
        "  final B b;",
        "  const C(this.b);",
        "}",
        "var v = const C(const A());"]));
    resolve(source);
    assertErrors(source, [
        CheckedModeCompileTimeErrorCode.CONST_CONSTRUCTOR_PARAM_TYPE_MISMATCH]);
    verify([source]);
  }

  void test_fieldFormalParameterNotAssignableToField_list() {
    // <num>[1, 2, 3] has type List<num>, which is not a subtype of List<int>.
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  const A(List<int> x);",
        "}",
        "var x = const A(const <num>[1, 2, 3]);"]));
    resolve(source);
    assertErrors(source, [
        CheckedModeCompileTimeErrorCode.CONST_CONSTRUCTOR_PARAM_TYPE_MISMATCH]);
    verify([source]);
  }

  void test_fieldFormalParameterNotAssignableToField_map_keyMismatch() {
    // <num, int>{1: 2} has type Map<num, int>, which is not a subtype of
    // Map<int, int>.
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  const A(Map<int, int> x);",
        "}",
        "var x = const A(const <num, int>{1: 2});"]));
    resolve(source);
    assertErrors(source, [
        CheckedModeCompileTimeErrorCode.CONST_CONSTRUCTOR_PARAM_TYPE_MISMATCH]);
    verify([source]);
  }

  void test_fieldFormalParameterNotAssignableToField_map_valueMismatch() {
    // <int, num>{1: 2} has type Map<int, num>, which is not a subtype of
    // Map<int, int>.
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  const A(Map<int, int> x);",
        "}",
        "var x = const A(const <int, num>{1: 2});"]));
    resolve(source);
    assertErrors(source, [
        CheckedModeCompileTimeErrorCode.CONST_CONSTRUCTOR_PARAM_TYPE_MISMATCH]);
    verify([source]);
  }

  void test_fieldFormalParameterNotAssignableToField_optional() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  final int x;",
        "  const A([this.x = 'foo']);",
        "}",
        "var v = const A();"]));
    resolve(source);
    assertErrors(source, [
        CheckedModeCompileTimeErrorCode.CONST_CONSTRUCTOR_PARAM_TYPE_MISMATCH,
        StaticTypeWarningCode.INVALID_ASSIGNMENT]);
    verify([source]);
  }

  void test_fieldFormalParameterNotAssignableToField_typedef() {
    // foo has the runtime type String -> int, so it should not be assignable
    // to A.f (A.f requires it to be int -> String).
    Source source = addSource(EngineTestCase.createSource([
        "typedef String Int2String(int x);",
        "class A {",
        "  final Int2String f;",
        "  const A(this.f);",
        "}",
        "int foo(String x) => 1;"
        "var v = const A(foo);"]));
    resolve(source);
    assertErrors(source, [
        CheckedModeCompileTimeErrorCode.CONST_CONSTRUCTOR_PARAM_TYPE_MISMATCH,
        StaticWarningCode.ARGUMENT_TYPE_NOT_ASSIGNABLE]);
    verify([source]);
  }

  void test_fieldInitializerNotAssignable() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  final int x;",
        "  const A() : x = '';",
        "}"]));
    resolve(source);
    assertErrors(source, [
        CheckedModeCompileTimeErrorCode.CONST_FIELD_INITIALIZER_NOT_ASSIGNABLE,
        StaticWarningCode.FIELD_INITIALIZER_NOT_ASSIGNABLE]);
    verify([source]);
  }

  void test_fieldTypeMismatch() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  const A(x) : y = x;",
        "  final int y;",
        "}",
        "var v = const A('foo');"]));
    resolve(source);
    assertErrors(source, [
        CheckedModeCompileTimeErrorCode.CONST_CONSTRUCTOR_FIELD_TYPE_MISMATCH]);
    verify([source]);
  }

  void test_fieldTypeMismatch_unresolved() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  const A(x) : y = x;",
        "  final Unresolved y;",
        "}",
        "var v = const A('foo');"]));
    resolve(source);
    assertErrors(source, [
        CheckedModeCompileTimeErrorCode.CONST_CONSTRUCTOR_FIELD_TYPE_MISMATCH,
        StaticWarningCode.UNDEFINED_CLASS]);
    verify([source]);
  }

  void test_fieldTypeOk_null() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  const A(x) : y = x;",
        "  final int y;",
        "}",
        "var v = const A(null);"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_fieldTypeOk_unresolved_null() {
    // Null always passes runtime type checks, even when the type is
    // unresolved.
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  const A(x) : y = x;",
        "  final Unresolved y;",
        "}",
        "var v = const A(null);"]));
    resolve(source);
    assertErrors(source, [
        StaticWarningCode.UNDEFINED_CLASS]);
    verify([source]);
  }

  void test_listElementTypeNotAssignable() {
    Source source = addSource(EngineTestCase.createSource(["var v = const <String> [42];"]));
    resolve(source);
    assertErrors(source, [
        CheckedModeCompileTimeErrorCode.LIST_ELEMENT_TYPE_NOT_ASSIGNABLE,
        StaticWarningCode.LIST_ELEMENT_TYPE_NOT_ASSIGNABLE]);
    verify([source]);
  }

  void test_mapKeyTypeNotAssignable() {
    Source source = addSource(EngineTestCase.createSource(["var v = const <String, int > {1 : 2};"]));
    resolve(source);
    assertErrors(source, [
        CheckedModeCompileTimeErrorCode.MAP_KEY_TYPE_NOT_ASSIGNABLE,
        StaticWarningCode.MAP_KEY_TYPE_NOT_ASSIGNABLE]);
    verify([source]);
  }

  void test_mapValueTypeNotAssignable() {
    Source source = addSource(EngineTestCase.createSource(["var v = const <String, String> {'a' : 2};"]));
    resolve(source);
    assertErrors(source, [
        CheckedModeCompileTimeErrorCode.MAP_VALUE_TYPE_NOT_ASSIGNABLE,
        StaticWarningCode.MAP_VALUE_TYPE_NOT_ASSIGNABLE]);
    verify([source]);
  }

  void test_redirectingConstructor_paramTypeMismatch() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  const A.a1(x) : this.a2(x);",
        "  const A.a2(String x);",
        "}",
        "var v = const A.a1(0);"]));
    resolve(source);
    assertErrors(source, [
        CheckedModeCompileTimeErrorCode.CONST_CONSTRUCTOR_PARAM_TYPE_MISMATCH]);
    verify([source]);
  }

  void test_parameterAssignable_null() {
    // Null is assignable to anything.
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  const A(int x);",
        "}",
        "var v = const A(null);"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_parameterAssignable_undefined_null() {
    // Null always passes runtime type checks, even when the type is
    // unresolved.
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  const A(Unresolved x);",
        "}",
        "var v = const A(null);"]));
    resolve(source);
    assertErrors(source, [
        StaticWarningCode.UNDEFINED_CLASS]);
    verify([source]);
  }

  void test_parameterAssignable_typeSubstitution() {
    Source source = addSource(EngineTestCase.createSource([
        "class A<T> {",
        "  const A(T x);",
        "}",
        "var v = const A<int>(3);"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_parameterNotAssignable() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  const A(int x);",
        "}",
        "var v = const A('foo');"]));
    resolve(source);
    assertErrors(source, [
        CheckedModeCompileTimeErrorCode.CONST_CONSTRUCTOR_PARAM_TYPE_MISMATCH,
        StaticWarningCode.ARGUMENT_TYPE_NOT_ASSIGNABLE]);
    verify([source]);
  }

  void test_parameterNotAssignable_undefined() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  const A(Unresolved x);",
        "}",
        "var v = const A('foo');"]));
    resolve(source);
    assertErrors(source, [
        CheckedModeCompileTimeErrorCode.CONST_CONSTRUCTOR_PARAM_TYPE_MISMATCH,
        StaticWarningCode.UNDEFINED_CLASS]);
    verify([source]);
  }

  void test_parameterNotAssignable_typeSubstitution() {
    Source source = addSource(EngineTestCase.createSource([
        "class A<T> {",
        "  const A(T x);",
        "}",
        "var v = const A<int>('foo');"]));
    resolve(source);
    assertErrors(source, [
        CheckedModeCompileTimeErrorCode.CONST_CONSTRUCTOR_PARAM_TYPE_MISMATCH,
        StaticWarningCode.ARGUMENT_TYPE_NOT_ASSIGNABLE]);
    verify([source]);
  }

  void test_topLevelVarAssignable_null() {
    Source source = addSource(EngineTestCase.createSource([
        "const int x = null;"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_topLevelVarAssignable_undefined_null() {
    // Null always passes runtime type checks, even when the type is
    // unresolved.
    Source source = addSource(EngineTestCase.createSource([
        "const Unresolved x = null;"]));
    resolve(source);
    assertErrors(source, [
        StaticWarningCode.UNDEFINED_CLASS]);
    verify([source]);
  }

  void test_topLevelVarNotAssignable() {
    Source source = addSource(EngineTestCase.createSource([
        "const int x = 'foo';"]));
    resolve(source);
    assertErrors(source, [
        CheckedModeCompileTimeErrorCode.VARIABLE_TYPE_MISMATCH,
        StaticTypeWarningCode.INVALID_ASSIGNMENT]);
    verify([source]);
  }

  void test_topLevelVarNotAssignable_undefined() {
    Source source = addSource(EngineTestCase.createSource([
        "const Unresolved x = 'foo';"]));
    resolve(source);
    assertErrors(source, [
        CheckedModeCompileTimeErrorCode.VARIABLE_TYPE_MISMATCH,
        StaticWarningCode.UNDEFINED_CLASS]);
    verify([source]);
  }
}

class DeclarationMatcherTest extends ResolverTestCase {
  void test_compilationUnitMatches_false_topLevelVariable() {
    _assertCompilationUnitMatches(false, EngineTestCase.createSource([
        "class C {",
        "  int m(int p) {",
        "    return p + p;",
        "  }",
        "}"]), EngineTestCase.createSource([
        "const int ZERO = 0;",
        "class C {",
        "  int m(int p) {",
        "    return (p * p) + (p * p) + ZERO;",
        "  }",
        "}"]));
  }

  void test_compilationUnitMatches_true_different() {
    _assertCompilationUnitMatches(true, EngineTestCase.createSource([
        "class C {",
        "  int m(int p) {",
        "    return p + p;",
        "  }",
        "}"]), EngineTestCase.createSource([
        "class C {",
        "  int m(int p) {",
        "    return (p * p) + (p * p);",
        "  }",
        "}"]));
  }

  void test_compilationUnitMatches_true_same() {
    String content = EngineTestCase.createSource([
        "class C {",
        "  int m(int p) {",
        "    return p + p;",
        "  }",
        "}"]);
    _assertCompilationUnitMatches(true, content, content);
  }

  void test_methodDeclarationMatches_false_localVariable() {
    _assertMethodMatches(false, EngineTestCase.createSource([
        "class C {",
        "  int m(int p) {",
        "    return p + p;",
        "  }",
        "}"]), EngineTestCase.createSource([
        "class C {",
        "  int m(int p) {",
        "    int product = p * p;",
        "    return product + product;",
        "  }",
        "}"]));
  }

  void test_methodDeclarationMatches_false_parameter() {
    _assertMethodMatches(false, EngineTestCase.createSource([
        "class C {",
        "  int m(int p) {",
        "    return p + p;",
        "  }",
        "}"]), EngineTestCase.createSource([
        "class C {",
        "  int m(int p, int q) {",
        "    return (p * q) + (q * p);",
        "  }",
        "}"]));
  }

  void test_methodDeclarationMatches_true_different() {
    _assertMethodMatches(true, EngineTestCase.createSource([
        "class C {",
        "  int m(int p) {",
        "    return p + p;",
        "  }",
        "}"]), EngineTestCase.createSource([
        "class C {",
        "  int m(int p) {",
        "    return (p * p) + (p * p);",
        "  }",
        "}"]));
  }

  void test_methodDeclarationMatches_true_same() {
    String content = EngineTestCase.createSource([
        "class C {",
        "  int m(int p) {",
        "    return p + p;",
        "  }",
        "}"]);
    _assertMethodMatches(true, content, content);
  }

  void _assertCompilationUnitMatches(bool expectMatch, String oldContent, String newContent) {
    Source source = addSource(oldContent);
    LibraryElement library = resolve(source);
    CompilationUnit oldUnit = resolveCompilationUnit(source, library);
    AnalysisContext context = analysisContext;
    context.setContents(source, newContent);
    CompilationUnit newUnit = context.parseCompilationUnit(source);
    DeclarationMatcher matcher = new DeclarationMatcher();
    JUnitTestCase.assertEquals(expectMatch, matcher.matches(newUnit, oldUnit.element));
  }

  void _assertMethodMatches(bool expectMatch, String oldContent, String newContent) {
    Source source = addSource(oldContent);
    LibraryElement library = resolve(source);
    CompilationUnit oldUnit = resolveCompilationUnit(source, library);
    MethodElement element = _getFirstMethod(oldUnit).element as MethodElement;
    AnalysisContext context = analysisContext;
    context.setContents(source, newContent);
    CompilationUnit newUnit = context.parseCompilationUnit(source);
    MethodDeclaration newMethod = _getFirstMethod(newUnit);
    DeclarationMatcher matcher = new DeclarationMatcher();
    JUnitTestCase.assertEquals(expectMatch, matcher.matches(newMethod, element));
  }

  MethodDeclaration _getFirstMethod(CompilationUnit unit) {
    ClassDeclaration classNode = unit.declarations[0] as ClassDeclaration;
    return classNode.members[0] as MethodDeclaration;
  }
}

class DirectoryBasedDartSdk_AnalysisContextFactory_initContextWithCore extends DirectoryBasedDartSdk {
  DirectoryBasedDartSdk_AnalysisContextFactory_initContextWithCore(JavaFile arg0) : super(arg0);

  @override
  LibraryMap initialLibraryMap(bool useDart2jsPaths) {
    LibraryMap map = new LibraryMap();
    _addLibrary(map, DartSdk.DART_ASYNC, false, "async.dart");
    _addLibrary(map, DartSdk.DART_CORE, false, "core.dart");
    _addLibrary(map, DartSdk.DART_HTML, false, "html_dartium.dart");
    _addLibrary(map, AnalysisContextFactory._DART_MATH, false, "math.dart");
    _addLibrary(map, AnalysisContextFactory._DART_INTERCEPTORS, true, "_interceptors.dart");
    _addLibrary(map, AnalysisContextFactory._DART_JS_HELPER, true, "_js_helper.dart");
    return map;
  }

  void _addLibrary(LibraryMap map, String uri, bool isInternal, String path) {
    SdkLibraryImpl library = new SdkLibraryImpl(uri);
    if (isInternal) {
      library.category = "Internal";
    }
    library.path = path;
    map.setLibrary(uri, library);
  }
}

class ElementResolverTest extends EngineTestCase {
  /**
   * The error listener to which errors will be reported.
   */
  GatheringErrorListener _listener;

  /**
   * The type provider used to access the types.
   */
  TestTypeProvider _typeProvider;

  /**
   * The library containing the code being resolved.
   */
  LibraryElementImpl _definingLibrary;

  /**
   * The resolver visitor that maintains the state for the resolver.
   */
  ResolverVisitor _visitor;

  /**
   * The resolver being used to resolve the test cases.
   */
  ElementResolver _resolver;

  void fail_visitExportDirective_combinators() {
    JUnitTestCase.fail("Not yet tested");
    // Need to set up the exported library so that the identifier can be resolved
    ExportDirective directive = AstFactory.exportDirective2(null, [AstFactory.hideCombinator2(["A"])]);
    _resolveNode(directive, []);
    _listener.assertNoErrors();
  }

  void fail_visitFunctionExpressionInvocation() {
    JUnitTestCase.fail("Not yet tested");
    _listener.assertNoErrors();
  }

  void fail_visitImportDirective_combinators_noPrefix() {
    JUnitTestCase.fail("Not yet tested");
    // Need to set up the imported library so that the identifier can be resolved
    ImportDirective directive = AstFactory.importDirective3(null, null, [AstFactory.showCombinator2(["A"])]);
    _resolveNode(directive, []);
    _listener.assertNoErrors();
  }

  void fail_visitImportDirective_combinators_prefix() {
    JUnitTestCase.fail("Not yet tested");
    // Need to set up the imported library so that the identifiers can be resolved
    String prefixName = "p";
    _definingLibrary.imports = <ImportElement> [ElementFactory.importFor(null, ElementFactory.prefix(prefixName), [])];
    ImportDirective directive = AstFactory.importDirective3(null, prefixName, [
        AstFactory.showCombinator2(["A"]),
        AstFactory.hideCombinator2(["B"])]);
    _resolveNode(directive, []);
    _listener.assertNoErrors();
  }

  void fail_visitRedirectingConstructorInvocation() {
    JUnitTestCase.fail("Not yet tested");
    _listener.assertNoErrors();
  }

  @override
  void setUp() {
    _listener = new GatheringErrorListener();
    _typeProvider = new TestTypeProvider();
    _resolver = _createResolver();
  }

  void test_lookUpMethodInInterfaces() {
    InterfaceType intType = _typeProvider.intType;
    //
    // abstract class A { int operator[](int index); }
    //
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    MethodElement operator = ElementFactory.methodElement("[]", intType, [intType]);
    classA.methods = <MethodElement> [operator];
    //
    // class B implements A {}
    //
    ClassElementImpl classB = ElementFactory.classElement2("B", []);
    classB.interfaces = <InterfaceType> [classA.type];
    //
    // class C extends Object with B {}
    //
    ClassElementImpl classC = ElementFactory.classElement2("C", []);
    classC.mixins = <InterfaceType> [classB.type];
    //
    // class D extends C {}
    //
    ClassElementImpl classD = ElementFactory.classElement("D", classC.type, []);
    //
    // D a;
    // a[i];
    //
    SimpleIdentifier array = AstFactory.identifier3("a");
    array.staticType = classD.type;
    IndexExpression expression = AstFactory.indexExpression(array, AstFactory.identifier3("i"));
    JUnitTestCase.assertSame(operator, _resolveIndexExpression(expression, []));
    _listener.assertNoErrors();
  }

  void test_visitAssignmentExpression_compound() {
    InterfaceType intType = _typeProvider.intType;
    SimpleIdentifier leftHandSide = AstFactory.identifier3("a");
    leftHandSide.staticType = intType;
    AssignmentExpression assignment = AstFactory.assignmentExpression(leftHandSide, TokenType.PLUS_EQ, AstFactory.integer(1));
    _resolveNode(assignment, []);
    JUnitTestCase.assertSame(getMethod(_typeProvider.numType, "+"), assignment.staticElement);
    _listener.assertNoErrors();
  }

  void test_visitAssignmentExpression_simple() {
    AssignmentExpression expression = AstFactory.assignmentExpression(AstFactory.identifier3("x"), TokenType.EQ, AstFactory.integer(0));
    _resolveNode(expression, []);
    JUnitTestCase.assertNull(expression.staticElement);
    _listener.assertNoErrors();
  }

  void test_visitBinaryExpression() {
    // num i;
    // var j;
    // i + j
    InterfaceType numType = _typeProvider.numType;
    SimpleIdentifier left = AstFactory.identifier3("i");
    left.staticType = numType;
    BinaryExpression expression = AstFactory.binaryExpression(left, TokenType.PLUS, AstFactory.identifier3("j"));
    _resolveNode(expression, []);
    JUnitTestCase.assertEquals(getMethod(numType, "+"), expression.staticElement);
    JUnitTestCase.assertNull(expression.propagatedElement);
    _listener.assertNoErrors();
  }

  void test_visitBinaryExpression_propagatedElement() {
    // var i = 1;
    // var j;
    // i + j
    InterfaceType numType = _typeProvider.numType;
    SimpleIdentifier left = AstFactory.identifier3("i");
    left.propagatedType = numType;
    BinaryExpression expression = AstFactory.binaryExpression(left, TokenType.PLUS, AstFactory.identifier3("j"));
    _resolveNode(expression, []);
    JUnitTestCase.assertNull(expression.staticElement);
    JUnitTestCase.assertEquals(getMethod(numType, "+"), expression.propagatedElement);
    _listener.assertNoErrors();
  }

  void test_visitBreakStatement_withLabel() {
    String label = "loop";
    LabelElementImpl labelElement = new LabelElementImpl(AstFactory.identifier3(label), false, false);
    BreakStatement statement = AstFactory.breakStatement2(label);
    JUnitTestCase.assertSame(labelElement, _resolveBreak(statement, labelElement));
    _listener.assertNoErrors();
  }

  void test_visitBreakStatement_withoutLabel() {
    BreakStatement statement = AstFactory.breakStatement();
    _resolveStatement(statement, null);
    _listener.assertNoErrors();
  }

  void test_visitConstructorName_named() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String constructorName = "a";
    ConstructorElement constructor = ElementFactory.constructorElement2(classA, constructorName, []);
    classA.constructors = <ConstructorElement> [constructor];
    ConstructorName name = AstFactory.constructorName(AstFactory.typeName(classA, []), constructorName);
    _resolveNode(name, []);
    JUnitTestCase.assertSame(constructor, name.staticElement);
    _listener.assertNoErrors();
  }

  void test_visitConstructorName_unnamed() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String constructorName = null;
    ConstructorElement constructor = ElementFactory.constructorElement2(classA, constructorName, []);
    classA.constructors = <ConstructorElement> [constructor];
    ConstructorName name = AstFactory.constructorName(AstFactory.typeName(classA, []), constructorName);
    _resolveNode(name, []);
    JUnitTestCase.assertSame(constructor, name.staticElement);
    _listener.assertNoErrors();
  }

  void test_visitContinueStatement_withLabel() {
    String label = "loop";
    LabelElementImpl labelElement = new LabelElementImpl(AstFactory.identifier3(label), false, false);
    ContinueStatement statement = AstFactory.continueStatement(label);
    JUnitTestCase.assertSame(labelElement, _resolveContinue(statement, labelElement));
    _listener.assertNoErrors();
  }

  void test_visitContinueStatement_withoutLabel() {
    ContinueStatement statement = AstFactory.continueStatement();
    _resolveStatement(statement, null);
    _listener.assertNoErrors();
  }

  void test_visitExportDirective_noCombinators() {
    ExportDirective directive = AstFactory.exportDirective2(null, []);
    directive.element = ElementFactory.exportFor(ElementFactory.library(_definingLibrary.context, "lib"), []);
    _resolveNode(directive, []);
    _listener.assertNoErrors();
  }

  void test_visitFieldFormalParameter() {
    String fieldName = "f";
    InterfaceType intType = _typeProvider.intType;
    FieldElementImpl fieldElement = ElementFactory.fieldElement(fieldName, false, false, false, intType);
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    classA.fields = <FieldElement> [fieldElement];
    FieldFormalParameter parameter = AstFactory.fieldFormalParameter2(fieldName);
    FieldFormalParameterElementImpl parameterElement = ElementFactory.fieldFormalParameter(parameter.identifier);
    parameterElement.field = fieldElement;
    parameterElement.type = intType;
    parameter.identifier.staticElement = parameterElement;
    _resolveInClass(parameter, classA);
    JUnitTestCase.assertSame(intType, parameter.element.type);
  }

  void test_visitImportDirective_noCombinators_noPrefix() {
    ImportDirective directive = AstFactory.importDirective3(null, null, []);
    directive.element = ElementFactory.importFor(ElementFactory.library(_definingLibrary.context, "lib"), null, []);
    _resolveNode(directive, []);
    _listener.assertNoErrors();
  }

  void test_visitImportDirective_noCombinators_prefix() {
    String prefixName = "p";
    ImportElement importElement = ElementFactory.importFor(ElementFactory.library(_definingLibrary.context, "lib"), ElementFactory.prefix(prefixName), []);
    _definingLibrary.imports = <ImportElement> [importElement];
    ImportDirective directive = AstFactory.importDirective3(null, prefixName, []);
    directive.element = importElement;
    _resolveNode(directive, []);
    _listener.assertNoErrors();
  }

  void test_visitImportDirective_withCombinators() {
    ShowCombinator combinator = AstFactory.showCombinator2(["A", "B", "C"]);
    ImportDirective directive = AstFactory.importDirective3(null, null, [combinator]);
    LibraryElementImpl library = ElementFactory.library(_definingLibrary.context, "lib");
    TopLevelVariableElementImpl varA = ElementFactory.topLevelVariableElement2("A");
    TopLevelVariableElementImpl varB = ElementFactory.topLevelVariableElement2("B");
    TopLevelVariableElementImpl varC = ElementFactory.topLevelVariableElement2("C");
    CompilationUnitElementImpl unit = library.definingCompilationUnit as CompilationUnitElementImpl;
    unit.accessors = <PropertyAccessorElement> [varA.getter, varA.setter, varB.getter, varC.setter];
    unit.topLevelVariables = <TopLevelVariableElement> [varA, varB, varC];
    directive.element = ElementFactory.importFor(library, null, []);
    _resolveNode(directive, []);
    JUnitTestCase.assertSame(varA, combinator.shownNames[0].staticElement);
    JUnitTestCase.assertSame(varB, combinator.shownNames[1].staticElement);
    JUnitTestCase.assertSame(varC, combinator.shownNames[2].staticElement);
    _listener.assertNoErrors();
  }

  void test_visitIndexExpression_get() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    InterfaceType intType = _typeProvider.intType;
    MethodElement getter = ElementFactory.methodElement("[]", intType, [intType]);
    classA.methods = <MethodElement> [getter];
    SimpleIdentifier array = AstFactory.identifier3("a");
    array.staticType = classA.type;
    IndexExpression expression = AstFactory.indexExpression(array, AstFactory.identifier3("i"));
    JUnitTestCase.assertSame(getter, _resolveIndexExpression(expression, []));
    _listener.assertNoErrors();
  }

  void test_visitIndexExpression_set() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    InterfaceType intType = _typeProvider.intType;
    MethodElement setter = ElementFactory.methodElement("[]=", intType, [intType]);
    classA.methods = <MethodElement> [setter];
    SimpleIdentifier array = AstFactory.identifier3("a");
    array.staticType = classA.type;
    IndexExpression expression = AstFactory.indexExpression(array, AstFactory.identifier3("i"));
    AstFactory.assignmentExpression(expression, TokenType.EQ, AstFactory.integer(0));
    JUnitTestCase.assertSame(setter, _resolveIndexExpression(expression, []));
    _listener.assertNoErrors();
  }

  void test_visitInstanceCreationExpression_named() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String constructorName = "a";
    ConstructorElement constructor = ElementFactory.constructorElement2(classA, constructorName, []);
    classA.constructors = <ConstructorElement> [constructor];
    ConstructorName name = AstFactory.constructorName(AstFactory.typeName(classA, []), constructorName);
    name.staticElement = constructor;
    InstanceCreationExpression creation = AstFactory.instanceCreationExpression(Keyword.NEW, name, []);
    _resolveNode(creation, []);
    JUnitTestCase.assertSame(constructor, creation.staticElement);
    _listener.assertNoErrors();
  }

  void test_visitInstanceCreationExpression_unnamed() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String constructorName = null;
    ConstructorElement constructor = ElementFactory.constructorElement2(classA, constructorName, []);
    classA.constructors = <ConstructorElement> [constructor];
    ConstructorName name = AstFactory.constructorName(AstFactory.typeName(classA, []), constructorName);
    name.staticElement = constructor;
    InstanceCreationExpression creation = AstFactory.instanceCreationExpression(Keyword.NEW, name, []);
    _resolveNode(creation, []);
    JUnitTestCase.assertSame(constructor, creation.staticElement);
    _listener.assertNoErrors();
  }

  void test_visitInstanceCreationExpression_unnamed_namedParameter() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String constructorName = null;
    ConstructorElementImpl constructor = ElementFactory.constructorElement2(classA, constructorName, []);
    String parameterName = "a";
    ParameterElement parameter = ElementFactory.namedParameter(parameterName);
    constructor.parameters = <ParameterElement> [parameter];
    classA.constructors = <ConstructorElement> [constructor];
    ConstructorName name = AstFactory.constructorName(AstFactory.typeName(classA, []), constructorName);
    name.staticElement = constructor;
    InstanceCreationExpression creation = AstFactory.instanceCreationExpression(Keyword.NEW, name, [AstFactory.namedExpression2(parameterName, AstFactory.integer(0))]);
    _resolveNode(creation, []);
    JUnitTestCase.assertSame(constructor, creation.staticElement);
    JUnitTestCase.assertSame(parameter, (creation.argumentList.arguments[0] as NamedExpression).name.label.staticElement);
    _listener.assertNoErrors();
  }

  void test_visitMethodInvocation() {
    InterfaceType numType = _typeProvider.numType;
    SimpleIdentifier left = AstFactory.identifier3("i");
    left.staticType = numType;
    String methodName = "abs";
    MethodInvocation invocation = AstFactory.methodInvocation(left, methodName, []);
    _resolveNode(invocation, []);
    JUnitTestCase.assertSame(getMethod(numType, methodName), invocation.methodName.staticElement);
    _listener.assertNoErrors();
  }

  void test_visitMethodInvocation_namedParameter() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String methodName = "m";
    String parameterName = "p";
    MethodElementImpl method = ElementFactory.methodElement(methodName, null, []);
    ParameterElement parameter = ElementFactory.namedParameter(parameterName);
    method.parameters = <ParameterElement> [parameter];
    classA.methods = <MethodElement> [method];
    SimpleIdentifier left = AstFactory.identifier3("i");
    left.staticType = classA.type;
    MethodInvocation invocation = AstFactory.methodInvocation(left, methodName, [AstFactory.namedExpression2(parameterName, AstFactory.integer(0))]);
    _resolveNode(invocation, []);
    JUnitTestCase.assertSame(method, invocation.methodName.staticElement);
    JUnitTestCase.assertSame(parameter, (invocation.argumentList.arguments[0] as NamedExpression).name.label.staticElement);
    _listener.assertNoErrors();
  }

  void test_visitPostfixExpression() {
    InterfaceType numType = _typeProvider.numType;
    SimpleIdentifier operand = AstFactory.identifier3("i");
    operand.staticType = numType;
    PostfixExpression expression = AstFactory.postfixExpression(operand, TokenType.PLUS_PLUS);
    _resolveNode(expression, []);
    JUnitTestCase.assertEquals(getMethod(numType, "+"), expression.staticElement);
    _listener.assertNoErrors();
  }

  void test_visitPrefixedIdentifier_dynamic() {
    DartType dynamicType = _typeProvider.dynamicType;
    SimpleIdentifier target = AstFactory.identifier3("a");
    VariableElementImpl variable = ElementFactory.localVariableElement(target);
    variable.type = dynamicType;
    target.staticElement = variable;
    target.staticType = dynamicType;
    PrefixedIdentifier identifier = AstFactory.identifier(target, AstFactory.identifier3("b"));
    _resolveNode(identifier, []);
    JUnitTestCase.assertNull(identifier.staticElement);
    JUnitTestCase.assertNull(identifier.identifier.staticElement);
    _listener.assertNoErrors();
  }

  void test_visitPrefixedIdentifier_nonDynamic() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String getterName = "b";
    PropertyAccessorElement getter = ElementFactory.getterElement(getterName, false, _typeProvider.intType);
    classA.accessors = <PropertyAccessorElement> [getter];
    SimpleIdentifier target = AstFactory.identifier3("a");
    VariableElementImpl variable = ElementFactory.localVariableElement(target);
    variable.type = classA.type;
    target.staticElement = variable;
    target.staticType = classA.type;
    PrefixedIdentifier identifier = AstFactory.identifier(target, AstFactory.identifier3(getterName));
    _resolveNode(identifier, []);
    JUnitTestCase.assertSame(getter, identifier.staticElement);
    JUnitTestCase.assertSame(getter, identifier.identifier.staticElement);
    _listener.assertNoErrors();
  }

  void test_visitPrefixedIdentifier_staticClassMember_getter() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    // set accessors
    String propName = "b";
    PropertyAccessorElement getter = ElementFactory.getterElement(propName, false, _typeProvider.intType);
    PropertyAccessorElement setter = ElementFactory.setterElement(propName, false, _typeProvider.intType);
    classA.accessors = <PropertyAccessorElement> [getter, setter];
    // prepare "A.m"
    SimpleIdentifier target = AstFactory.identifier3("A");
    target.staticElement = classA;
    target.staticType = classA.type;
    PrefixedIdentifier identifier = AstFactory.identifier(target, AstFactory.identifier3(propName));
    // resolve
    _resolveNode(identifier, []);
    JUnitTestCase.assertSame(getter, identifier.staticElement);
    JUnitTestCase.assertSame(getter, identifier.identifier.staticElement);
    _listener.assertNoErrors();
  }

  void test_visitPrefixedIdentifier_staticClassMember_method() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    // set accessors
    String propName = "m";
    PropertyAccessorElement setter = ElementFactory.setterElement(propName, false, _typeProvider.intType);
    classA.accessors = <PropertyAccessorElement> [setter];
    // set methods
    MethodElement method = ElementFactory.methodElement("m", _typeProvider.intType, []);
    classA.methods = <MethodElement> [method];
    // prepare "A.m"
    SimpleIdentifier target = AstFactory.identifier3("A");
    target.staticElement = classA;
    target.staticType = classA.type;
    PrefixedIdentifier identifier = AstFactory.identifier(target, AstFactory.identifier3(propName));
    AstFactory.assignmentExpression(identifier, TokenType.EQ, AstFactory.nullLiteral());
    // resolve
    _resolveNode(identifier, []);
    JUnitTestCase.assertSame(method, identifier.staticElement);
    JUnitTestCase.assertSame(method, identifier.identifier.staticElement);
    _listener.assertNoErrors();
  }

  void test_visitPrefixedIdentifier_staticClassMember_setter() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    // set accessors
    String propName = "b";
    PropertyAccessorElement getter = ElementFactory.getterElement(propName, false, _typeProvider.intType);
    PropertyAccessorElement setter = ElementFactory.setterElement(propName, false, _typeProvider.intType);
    classA.accessors = <PropertyAccessorElement> [getter, setter];
    // prepare "A.b = null"
    SimpleIdentifier target = AstFactory.identifier3("A");
    target.staticElement = classA;
    target.staticType = classA.type;
    PrefixedIdentifier identifier = AstFactory.identifier(target, AstFactory.identifier3(propName));
    AstFactory.assignmentExpression(identifier, TokenType.EQ, AstFactory.nullLiteral());
    // resolve
    _resolveNode(identifier, []);
    JUnitTestCase.assertSame(setter, identifier.staticElement);
    JUnitTestCase.assertSame(setter, identifier.identifier.staticElement);
    _listener.assertNoErrors();
  }

  void test_visitPrefixExpression() {
    InterfaceType numType = _typeProvider.numType;
    SimpleIdentifier operand = AstFactory.identifier3("i");
    operand.staticType = numType;
    PrefixExpression expression = AstFactory.prefixExpression(TokenType.PLUS_PLUS, operand);
    _resolveNode(expression, []);
    JUnitTestCase.assertEquals(getMethod(numType, "+"), expression.staticElement);
    _listener.assertNoErrors();
  }

  void test_visitPropertyAccess_getter_identifier() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String getterName = "b";
    PropertyAccessorElement getter = ElementFactory.getterElement(getterName, false, _typeProvider.intType);
    classA.accessors = <PropertyAccessorElement> [getter];
    SimpleIdentifier target = AstFactory.identifier3("a");
    target.staticType = classA.type;
    PropertyAccess access = AstFactory.propertyAccess2(target, getterName);
    _resolveNode(access, []);
    JUnitTestCase.assertSame(getter, access.propertyName.staticElement);
    _listener.assertNoErrors();
  }

  void test_visitPropertyAccess_getter_super() {
    //
    // class A {
    //  int get b;
    // }
    // class B {
    //   ... super.m ...
    // }
    //
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String getterName = "b";
    PropertyAccessorElement getter = ElementFactory.getterElement(getterName, false, _typeProvider.intType);
    classA.accessors = <PropertyAccessorElement> [getter];
    SuperExpression target = AstFactory.superExpression();
    target.staticType = ElementFactory.classElement("B", classA.type, []).type;
    PropertyAccess access = AstFactory.propertyAccess2(target, getterName);
    AstFactory.methodDeclaration2(null, null, null, null, AstFactory.identifier3("m"), AstFactory.formalParameterList([]), AstFactory.expressionFunctionBody(access));
    _resolveNode(access, []);
    JUnitTestCase.assertSame(getter, access.propertyName.staticElement);
    _listener.assertNoErrors();
  }

  void test_visitPropertyAccess_setter_this() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String setterName = "b";
    PropertyAccessorElement setter = ElementFactory.setterElement(setterName, false, _typeProvider.intType);
    classA.accessors = <PropertyAccessorElement> [setter];
    ThisExpression target = AstFactory.thisExpression();
    target.staticType = classA.type;
    PropertyAccess access = AstFactory.propertyAccess2(target, setterName);
    AstFactory.assignmentExpression(access, TokenType.EQ, AstFactory.integer(0));
    _resolveNode(access, []);
    JUnitTestCase.assertSame(setter, access.propertyName.staticElement);
    _listener.assertNoErrors();
  }

  void test_visitSimpleIdentifier_classScope() {
    InterfaceType doubleType = _typeProvider.doubleType;
    String fieldName = "NAN";
    SimpleIdentifier node = AstFactory.identifier3(fieldName);
    _resolveInClass(node, doubleType.element);
    JUnitTestCase.assertEquals(getGetter(doubleType, fieldName), node.staticElement);
    _listener.assertNoErrors();
  }

  void test_visitSimpleIdentifier_dynamic() {
    SimpleIdentifier node = AstFactory.identifier3("dynamic");
    _resolveIdentifier(node, []);
    JUnitTestCase.assertSame(_typeProvider.dynamicType.element, node.staticElement);
    JUnitTestCase.assertSame(_typeProvider.typeType, node.staticType);
    _listener.assertNoErrors();
  }

  void test_visitSimpleIdentifier_lexicalScope() {
    SimpleIdentifier node = AstFactory.identifier3("i");
    VariableElementImpl element = ElementFactory.localVariableElement(node);
    JUnitTestCase.assertSame(element, _resolveIdentifier(node, [element]));
    _listener.assertNoErrors();
  }

  void test_visitSimpleIdentifier_lexicalScope_field_setter() {
    InterfaceType intType = _typeProvider.intType;
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String fieldName = "a";
    FieldElement field = ElementFactory.fieldElement(fieldName, false, false, false, intType);
    classA.fields = <FieldElement> [field];
    classA.accessors = <PropertyAccessorElement> [field.getter, field.setter];
    SimpleIdentifier node = AstFactory.identifier3(fieldName);
    AstFactory.assignmentExpression(node, TokenType.EQ, AstFactory.integer(0));
    _resolveInClass(node, classA);
    Element element = node.staticElement;
    EngineTestCase.assertInstanceOf((obj) => obj is PropertyAccessorElement, PropertyAccessorElement, element);
    JUnitTestCase.assertTrue((element as PropertyAccessorElement).isSetter);
    _listener.assertNoErrors();
  }

  void test_visitSuperConstructorInvocation() {
    ClassElementImpl superclass = ElementFactory.classElement2("A", []);
    ConstructorElementImpl superConstructor = ElementFactory.constructorElement2(superclass, null, []);
    superclass.constructors = <ConstructorElement> [superConstructor];
    ClassElementImpl subclass = ElementFactory.classElement("B", superclass.type, []);
    ConstructorElementImpl subConstructor = ElementFactory.constructorElement2(subclass, null, []);
    subclass.constructors = <ConstructorElement> [subConstructor];
    SuperConstructorInvocation invocation = AstFactory.superConstructorInvocation([]);
    _resolveInClass(invocation, subclass);
    JUnitTestCase.assertEquals(superConstructor, invocation.staticElement);
    _listener.assertNoErrors();
  }

  void test_visitSuperConstructorInvocation_namedParameter() {
    ClassElementImpl superclass = ElementFactory.classElement2("A", []);
    ConstructorElementImpl superConstructor = ElementFactory.constructorElement2(superclass, null, []);
    String parameterName = "p";
    ParameterElement parameter = ElementFactory.namedParameter(parameterName);
    superConstructor.parameters = <ParameterElement> [parameter];
    superclass.constructors = <ConstructorElement> [superConstructor];
    ClassElementImpl subclass = ElementFactory.classElement("B", superclass.type, []);
    ConstructorElementImpl subConstructor = ElementFactory.constructorElement2(subclass, null, []);
    subclass.constructors = <ConstructorElement> [subConstructor];
    SuperConstructorInvocation invocation = AstFactory.superConstructorInvocation([AstFactory.namedExpression2(parameterName, AstFactory.integer(0))]);
    _resolveInClass(invocation, subclass);
    JUnitTestCase.assertEquals(superConstructor, invocation.staticElement);
    JUnitTestCase.assertSame(parameter, (invocation.argumentList.arguments[0] as NamedExpression).name.label.staticElement);
    _listener.assertNoErrors();
  }

  /**
   * Create the resolver used by the tests.
   *
   * @return the resolver that was created
   */
  ElementResolver _createResolver() {
    AnalysisContextImpl context = new AnalysisContextImpl();
    SourceFactory sourceFactory = new SourceFactory([new DartUriResolver(DirectoryBasedDartSdk.defaultSdk)]);
    context.sourceFactory = sourceFactory;
    FileBasedSource source = new FileBasedSource.con1(FileUtilities2.createFile("/test.dart"));
    CompilationUnitElementImpl definingCompilationUnit = new CompilationUnitElementImpl("test.dart");
    definingCompilationUnit.source = source;
    _definingLibrary = ElementFactory.library(context, "test");
    _definingLibrary.definingCompilationUnit = definingCompilationUnit;
    Library library = new Library(context, _listener, source);
    library.libraryElement = _definingLibrary;
    _visitor = new ResolverVisitor.con1(library, source, _typeProvider);
    try {
      return _visitor.elementResolver_J2DAccessor as ElementResolver;
    } catch (exception) {
      throw new IllegalArgumentException("Could not create resolver", exception);
    }
  }

  /**
   * Return the element associated with the label of the given statement after the resolver has
   * resolved the statement.
   *
   * @param statement the statement to be resolved
   * @param labelElement the label element to be defined in the statement's label scope
   * @return the element to which the statement's label was resolved
   */
  Element _resolveBreak(BreakStatement statement, LabelElementImpl labelElement) {
    _resolveStatement(statement, labelElement);
    return statement.label.staticElement;
  }

  /**
   * Return the element associated with the label of the given statement after the resolver has
   * resolved the statement.
   *
   * @param statement the statement to be resolved
   * @param labelElement the label element to be defined in the statement's label scope
   * @return the element to which the statement's label was resolved
   */
  Element _resolveContinue(ContinueStatement statement, LabelElementImpl labelElement) {
    _resolveStatement(statement, labelElement);
    return statement.label.staticElement;
  }

  /**
   * Return the element associated with the given identifier after the resolver has resolved the
   * identifier.
   *
   * @param node the expression to be resolved
   * @param definedElements the elements that are to be defined in the scope in which the element is
   *          being resolved
   * @return the element to which the expression was resolved
   */
  Element _resolveIdentifier(Identifier node, List<Element> definedElements) {
    _resolveNode(node, definedElements);
    return node.staticElement;
  }

  /**
   * Return the element associated with the given identifier after the resolver has resolved the
   * identifier.
   *
   * @param node the expression to be resolved
   * @param enclosingClass the element representing the class enclosing the identifier
   * @return the element to which the expression was resolved
   */
  void _resolveInClass(AstNode node, ClassElement enclosingClass) {
    try {
      Scope outerScope = _visitor.nameScope_J2DAccessor as Scope;
      try {
        _visitor.enclosingClass_J2DAccessor = enclosingClass;
        EnclosedScope innerScope = new ClassScope(new TypeParameterScope(outerScope, enclosingClass), enclosingClass);
        _visitor.nameScope_J2DAccessor = innerScope;
        node.accept(_resolver);
      } finally {
        _visitor.enclosingClass_J2DAccessor = null;
        _visitor.nameScope_J2DAccessor = outerScope;
      }
    } catch (exception) {
      throw new IllegalArgumentException("Could not resolve node", exception);
    }
  }

  /**
   * Return the element associated with the given expression after the resolver has resolved the
   * expression.
   *
   * @param node the expression to be resolved
   * @param definedElements the elements that are to be defined in the scope in which the element is
   *          being resolved
   * @return the element to which the expression was resolved
   */
  Element _resolveIndexExpression(IndexExpression node, List<Element> definedElements) {
    _resolveNode(node, definedElements);
    return node.staticElement;
  }

  /**
   * Return the element associated with the given identifier after the resolver has resolved the
   * identifier.
   *
   * @param node the expression to be resolved
   * @param definedElements the elements that are to be defined in the scope in which the element is
   *          being resolved
   * @return the element to which the expression was resolved
   */
  void _resolveNode(AstNode node, List<Element> definedElements) {
    try {
      Scope outerScope = _visitor.nameScope_J2DAccessor as Scope;
      try {
        EnclosedScope innerScope = new EnclosedScope(outerScope);
        for (Element element in definedElements) {
          innerScope.define(element);
        }
        _visitor.nameScope_J2DAccessor = innerScope;
        node.accept(_resolver);
      } finally {
        _visitor.nameScope_J2DAccessor = outerScope;
      }
    } catch (exception) {
      throw new IllegalArgumentException("Could not resolve node", exception);
    }
  }

  /**
   * Return the element associated with the label of the given statement after the resolver has
   * resolved the statement.
   *
   * @param statement the statement to be resolved
   * @param labelElement the label element to be defined in the statement's label scope
   * @return the element to which the statement's label was resolved
   */
  void _resolveStatement(Statement statement, LabelElementImpl labelElement) {
    try {
      LabelScope outerScope = _visitor.labelScope_J2DAccessor as LabelScope;
      try {
        LabelScope innerScope;
        if (labelElement == null) {
          innerScope = new LabelScope.con1(outerScope, false, false);
        } else {
          innerScope = new LabelScope.con2(outerScope, labelElement.name, labelElement);
        }
        _visitor.labelScope_J2DAccessor = innerScope;
        statement.accept(_resolver);
      } finally {
        _visitor.labelScope_J2DAccessor = outerScope;
      }
    } catch (exception) {
      throw new IllegalArgumentException("Could not resolve node", exception);
    }
  }
}

class EnclosedScopeTest extends ResolverTestCase {
  void test_define_duplicate() {
    GatheringErrorListener listener = new GatheringErrorListener();
    Scope rootScope = new Scope_EnclosedScopeTest_test_define_duplicate(listener);
    EnclosedScope scope = new EnclosedScope(rootScope);
    VariableElement element1 = ElementFactory.localVariableElement(AstFactory.identifier3("v1"));
    VariableElement element2 = ElementFactory.localVariableElement(AstFactory.identifier3("v1"));
    scope.define(element1);
    scope.define(element2);
    listener.assertErrorsWithSeverities([ErrorSeverity.ERROR]);
  }

  void test_define_normal() {
    GatheringErrorListener listener = new GatheringErrorListener();
    Scope rootScope = new Scope_EnclosedScopeTest_test_define_normal(listener);
    EnclosedScope outerScope = new EnclosedScope(rootScope);
    EnclosedScope innerScope = new EnclosedScope(outerScope);
    VariableElement element1 = ElementFactory.localVariableElement(AstFactory.identifier3("v1"));
    VariableElement element2 = ElementFactory.localVariableElement(AstFactory.identifier3("v2"));
    outerScope.define(element1);
    innerScope.define(element2);
    listener.assertNoErrors();
  }
}

class ErrorResolverTest extends ResolverTestCase {
  void test_breakLabelOnSwitchMember() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  void m(int i) {",
        "    switch (i) {",
        "      l: case 0:",
        "        break;",
        "      case 1:",
        "        break l;",
        "    }",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [ResolverErrorCode.BREAK_LABEL_ON_SWITCH_MEMBER]);
    verify([source]);
  }

  void test_continueLabelOnSwitch() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  void m(int i) {",
        "    l: switch (i) {",
        "      case 0:",
        "        continue l;",
        "    }",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [ResolverErrorCode.CONTINUE_LABEL_ON_SWITCH]);
    verify([source]);
  }

  void test_enclosingElement_invalidLocalFunction() {
    Source source = addSource(EngineTestCase.createSource([
        "class C {",
        "  C() {",
        "    int get x => 0;",
        "  }",
        "}"]));
    LibraryElement library = resolve(source);
    JUnitTestCase.assertNotNull(library);
    var unit = library.definingCompilationUnit;
    JUnitTestCase.assertNotNull(unit);
    var types = unit.types;
    JUnitTestCase.assertNotNull(types);
    EngineTestCase.assertSizeOfList(1, types);
    var type = types[0];
    JUnitTestCase.assertNotNull(type);
    var constructors = type.constructors;
    JUnitTestCase.assertNotNull(constructors);
    EngineTestCase.assertSizeOfList(1, constructors);
    ConstructorElement constructor = constructors[0];
    JUnitTestCase.assertNotNull(constructor);
    List<FunctionElement> functions = constructor.functions;
    JUnitTestCase.assertNotNull(functions);
    EngineTestCase.assertSizeOfList(1, functions);
    JUnitTestCase.assertEquals(constructor, functions[0].enclosingElement);
    assertErrors(source, [ParserErrorCode.GETTER_IN_FUNCTION]);
  }
}

class HintCodeTest extends ResolverTestCase {
  void fail_deadCode_statementAfterRehrow() {
    Source source = addSource(EngineTestCase.createSource([
        "f() {",
        "  try {",
        "    var one = 1;",
        "  } catch (e) {",
        "    rethrow;",
        "    var two = 2;",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void fail_deadCode_statementAfterThrow() {
    Source source = addSource(EngineTestCase.createSource([
        "f() {",
        "  var one = 1;",
        "  throw 'Stop here';",
        "  var two = 2;",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void fail_isInt() {
    Source source = addSource(EngineTestCase.createSource(["var v = 1 is int;"]));
    resolve(source);
    assertErrors(source, [HintCode.IS_INT]);
    verify([source]);
  }

  void fail_isNotInt() {
    Source source = addSource(EngineTestCase.createSource(["var v = 1 is! int;"]));
    resolve(source);
    assertErrors(source, [HintCode.IS_NOT_INT]);
    verify([source]);
  }

  void fail_overrideEqualsButNotHashCode() {
    Source source = addSource(EngineTestCase.createSource(["class A {", "  bool operator ==(x) {}", "}"]));
    resolve(source);
    assertErrors(source, [HintCode.OVERRIDE_EQUALS_BUT_NOT_HASH_CODE]);
    verify([source]);
  }

  void fail_unusedImport_as_equalPrefixes() {
    // See todo at ImportsVerifier.prefixElementMap.
    Source source = addSource(EngineTestCase.createSource([
        "library L;",
        "import 'lib1.dart' as one;",
        "import 'lib2.dart' as one;",
        "one.A a;"]));
    Source source2 = addNamedSource("/lib1.dart", EngineTestCase.createSource(["library lib1;", "class A {}"]));
    Source source3 = addNamedSource("/lib2.dart", EngineTestCase.createSource(["library lib2;", "class B {}"]));
    resolve(source);
    assertErrors(source, [HintCode.UNUSED_IMPORT]);
    assertNoErrors(source2);
    assertNoErrors(source3);
    verify([source, source2, source3]);
  }

  void test_argumentTypeNotAssignable_functionType() {
    Source source = addSource(EngineTestCase.createSource([
        "m() {",
        "  var a = new A();",
        "  a.n(() => 0);",
        "}",
        "class A {",
        "  n(void f(int i)) {}",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.ARGUMENT_TYPE_NOT_ASSIGNABLE]);
    verify([source]);
  }

  void test_argumentTypeNotAssignable_message() {
    // The implementation of HintCode.ARGUMENT_TYPE_NOT_ASSIGNABLE assumes that
    // StaticWarningCode.ARGUMENT_TYPE_NOT_ASSIGNABLE has the same message.
    JUnitTestCase.assertEquals(HintCode.ARGUMENT_TYPE_NOT_ASSIGNABLE.message, StaticWarningCode.ARGUMENT_TYPE_NOT_ASSIGNABLE.message);
  }

  void test_argumentTypeNotAssignable_type() {
    Source source = addSource(EngineTestCase.createSource(["m() {", "  var i = '';", "  n(i);", "}", "n(int i) {}"]));
    resolve(source);
    assertErrors(source, [HintCode.ARGUMENT_TYPE_NOT_ASSIGNABLE]);
    verify([source]);
  }

  void test_argumentTypeNotAssignable_unionTypeMethodMerge() {
    enableUnionTypes(false);
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  int m(int x) => 0;",
        "}",
        "class B {",
        "  String m(String x) => '0';",
        "}",
        "f(A a, B b) {",
        "  var ab;",
        "  if (0 < 1) {",
        "    ab = a;",
        "  } else {",
        "    ab = b;",
        "  }",
        "  ab.m(0.5);",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.ARGUMENT_TYPE_NOT_ASSIGNABLE]);
    verify([source]);
  }

  void test_deadCode_deadBlock_conditionalElse() {
    Source source = addSource(EngineTestCase.createSource(["f() {", "  true ? 1 : 2;", "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void test_deadCode_deadBlock_conditionalElse_nested() {
    // test that a dead else-statement can't generate additional violations
    Source source = addSource(EngineTestCase.createSource(["f() {", "  true ? true : false && false;", "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void test_deadCode_deadBlock_conditionalIf() {
    Source source = addSource(EngineTestCase.createSource(["f() {", "  false ? 1 : 2;", "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void test_deadCode_deadBlock_conditionalIf_nested() {
    // test that a dead then-statement can't generate additional violations
    Source source = addSource(EngineTestCase.createSource(["f() {", "  false ? false && false : true;", "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void test_deadCode_deadBlock_else() {
    Source source = addSource(EngineTestCase.createSource(["f() {", "  if(true) {} else {}", "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void test_deadCode_deadBlock_else_nested() {
    // test that a dead else-statement can't generate additional violations
    Source source = addSource(EngineTestCase.createSource(["f() {", "  if(true) {} else {if (false) {}}", "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void test_deadCode_deadBlock_if() {
    Source source = addSource(EngineTestCase.createSource(["f() {", "  if(false) {}", "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void test_deadCode_deadBlock_if_nested() {
    // test that a dead then-statement can't generate additional violations
    Source source = addSource(EngineTestCase.createSource(["f() {", "  if(false) {if(false) {}}", "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void test_deadCode_deadBlock_while() {
    Source source = addSource(EngineTestCase.createSource(["f() {", "  while(false) {}", "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void test_deadCode_deadBlock_while_nested() {
    // test that a dead while body can't generate additional violations
    Source source = addSource(EngineTestCase.createSource(["f() {", "  while(false) {if(false) {}}", "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void test_deadCode_deadCatch_catchFollowingCatch() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "f() {",
        "  try {} catch (e) {} catch (e) {}",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE_CATCH_FOLLOWING_CATCH]);
    verify([source]);
  }

  void test_deadCode_deadCatch_catchFollowingCatch_nested() {
    // test that a dead catch clause can't generate additional violations
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "f() {",
        "  try {} catch (e) {} catch (e) {if(false) {}}",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE_CATCH_FOLLOWING_CATCH]);
    verify([source]);
  }

  void test_deadCode_deadCatch_catchFollowingCatch_object() {
    Source source = addSource(EngineTestCase.createSource([
        "f() {",
        "  try {} on Object catch (e) {} catch (e) {}",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE_CATCH_FOLLOWING_CATCH]);
    verify([source]);
  }

  void test_deadCode_deadCatch_catchFollowingCatch_object_nested() {
    // test that a dead catch clause can't generate additional violations
    Source source = addSource(EngineTestCase.createSource([
        "f() {",
        "  try {} on Object catch (e) {} catch (e) {if(false) {}}",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE_CATCH_FOLLOWING_CATCH]);
    verify([source]);
  }

  void test_deadCode_deadCatch_onCatchSubtype() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "class B extends A {}",
        "f() {",
        "  try {} on A catch (e) {} on B catch (e) {}",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE_ON_CATCH_SUBTYPE]);
    verify([source]);
  }

  void test_deadCode_deadCatch_onCatchSubtype_nested() {
    // test that a dead catch clause can't generate additional violations
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "class B extends A {}",
        "f() {",
        "  try {} on A catch (e) {} on B catch (e) {if(false) {}}",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE_ON_CATCH_SUBTYPE]);
    verify([source]);
  }

  void test_deadCode_deadOperandLHS_and() {
    Source source = addSource(EngineTestCase.createSource(["f() {", "  bool b = false && false;", "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void test_deadCode_deadOperandLHS_and_nested() {
    Source source = addSource(EngineTestCase.createSource(["f() {", "  bool b = false && (false && false);", "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void test_deadCode_deadOperandLHS_or() {
    Source source = addSource(EngineTestCase.createSource(["f() {", "  bool b = true || true;", "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void test_deadCode_deadOperandLHS_or_nested() {
    Source source = addSource(EngineTestCase.createSource(["f() {", "  bool b = true || (false && false);", "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void test_deadCode_statementAfterBreak_inDefaultCase() {
    Source source = addSource(EngineTestCase.createSource([
        "f(v) {",
        "  switch(v) {",
        "    case 1:",
        "    default:",
        "      break;",
        "      var a;",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void test_deadCode_statementAfterBreak_inForEachStatement() {
    Source source = addSource(EngineTestCase.createSource([
        "f() {",
        "  var list;",
        "  for(var l in list) {",
        "    break;",
        "    var a;",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void test_deadCode_statementAfterBreak_inForStatement() {
    Source source = addSource(EngineTestCase.createSource([
        "f() {",
        "  for(;;) {",
        "    break;",
        "    var a;",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void test_deadCode_statementAfterBreak_inSwitchCase() {
    Source source = addSource(EngineTestCase.createSource([
        "f(v) {",
        "  switch(v) {",
        "    case 1:",
        "      break;",
        "      var a;",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void test_deadCode_statementAfterBreak_inWhileStatement() {
    Source source = addSource(EngineTestCase.createSource([
        "f(v) {",
        "  while(v) {",
        "    break;",
        "    var a;",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void test_deadCode_statementAfterContinue_inForEachStatement() {
    Source source = addSource(EngineTestCase.createSource([
        "f() {",
        "  var list;",
        "  for(var l in list) {",
        "    continue;",
        "    var a;",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void test_deadCode_statementAfterContinue_inForStatement() {
    Source source = addSource(EngineTestCase.createSource([
        "f() {",
        "  for(;;) {",
        "    continue;",
        "    var a;",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void test_deadCode_statementAfterContinue_inWhileStatement() {
    Source source = addSource(EngineTestCase.createSource([
        "f(v) {",
        "  while(v) {",
        "    continue;",
        "    var a;",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void test_deadCode_statementAfterReturn_function() {
    Source source = addSource(EngineTestCase.createSource([
        "f() {",
        "  var one = 1;",
        "  return;",
        "  var two = 2;",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void test_deadCode_statementAfterReturn_ifStatement() {
    Source source = addSource(EngineTestCase.createSource([
        "f(bool b) {",
        "  if(b) {",
        "    var one = 1;",
        "    return;",
        "    var two = 2;",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void test_deadCode_statementAfterReturn_method() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  m() {",
        "    var one = 1;",
        "    return;",
        "    var two = 2;",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void test_deadCode_statementAfterReturn_nested() {
    Source source = addSource(EngineTestCase.createSource([
        "f() {",
        "  var one = 1;",
        "  return;",
        "  if(false) {}",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void test_deadCode_statementAfterReturn_twoReturns() {
    Source source = addSource(EngineTestCase.createSource([
        "f() {",
        "  var one = 1;",
        "  return;",
        "  var two = 2;",
        "  return;",
        "  var three = 3;",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEAD_CODE]);
    verify([source]);
  }

  void test_deprecatedAnnotationUse_assignment() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  @deprecated",
        "  A operator+(A a) { return a; }",
        "}",
        "f(A a) {",
        "  A b;",
        "  a += b;",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEPRECATED_MEMBER_USE]);
    verify([source]);
  }

  void test_deprecatedAnnotationUse_deprecated() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  @deprecated",
        "  m() {}",
        "  n() {m();}",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEPRECATED_MEMBER_USE]);
    verify([source]);
  }

  void test_deprecatedAnnotationUse_Deprecated() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  @Deprecated('0.9')",
        "  m() {}",
        "  n() {m();}",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEPRECATED_MEMBER_USE]);
    verify([source]);
  }

  void test_deprecatedAnnotationUse_deprecatedMethodCalledOnUnionType() {
    enableUnionTypes(false);
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  @deprecated f() => 0;",
        "}",
        "class B extends A {}",
        "main(A a, B b) {",
        "  var x;",
        "  if (0 < 1) {",
        "    x = a;",
        "  } else {",
        "    x = b;",
        "  }",
        "  x.f(); // Here [x] has type [{A,B}] but we still want the deprecation warning.",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEPRECATED_MEMBER_USE]);
    verify([source]);
  }

  void test_deprecatedAnnotationUse_export() {
    Source source = addSource(EngineTestCase.createSource(["export 'deprecated_library.dart';"]));
    addNamedSource("/deprecated_library.dart", EngineTestCase.createSource([
        "@deprecated",
        "library deprecated_library;",
        "class A {}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEPRECATED_MEMBER_USE]);
    verify([source]);
  }

  void test_deprecatedAnnotationUse_getter() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  @deprecated",
        "  get m => 1;",
        "}",
        "f(A a) {",
        "  return a.m;",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEPRECATED_MEMBER_USE]);
    verify([source]);
  }

  void test_deprecatedAnnotationUse_import() {
    Source source = addSource(EngineTestCase.createSource(["import 'deprecated_library.dart';", "f(A a) {}"]));
    addNamedSource("/deprecated_library.dart", EngineTestCase.createSource([
        "@deprecated",
        "library deprecated_library;",
        "class A {}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEPRECATED_MEMBER_USE]);
    verify([source]);
  }

  void test_deprecatedAnnotationUse_indexExpression() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  @deprecated",
        "  operator[](int i) {}",
        "}",
        "f(A a) {",
        "  return a[1];",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEPRECATED_MEMBER_USE]);
    verify([source]);
  }

  void test_deprecatedAnnotationUse_instanceCreation() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  @deprecated",
        "  A(int i) {}",
        "}",
        "f() {",
        "  A a = new A(1);",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEPRECATED_MEMBER_USE]);
    verify([source]);
  }

  void test_deprecatedAnnotationUse_instanceCreation_namedConstructor() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  @deprecated",
        "  A.named(int i) {}",
        "}",
        "f() {",
        "  A a = new A.named(1);",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEPRECATED_MEMBER_USE]);
    verify([source]);
  }

  void test_deprecatedAnnotationUse_operator() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  @deprecated",
        "  operator+(A a) {}",
        "}",
        "f(A a) {",
        "  A b;",
        "  return a + b;",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEPRECATED_MEMBER_USE]);
    verify([source]);
  }

  void test_deprecatedAnnotationUse_setter() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  @deprecated",
        "  set s(v) {}",
        "}",
        "f(A a) {",
        "  return a.s = 1;",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEPRECATED_MEMBER_USE]);
    verify([source]);
  }

  void test_deprecatedAnnotationUse_superConstructor() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  @deprecated",
        "  A() {}",
        "}",
        "class B extends A {",
        "  B() : super() {}",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEPRECATED_MEMBER_USE]);
    verify([source]);
  }

  void test_deprecatedAnnotationUse_superConstructor_namedConstructor() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  @deprecated",
        "  A.named() {}",
        "}",
        "class B extends A {",
        "  B() : super.named() {}",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DEPRECATED_MEMBER_USE]);
    verify([source]);
  }

  void test_divisionOptimization_double() {
    Source source = addSource(EngineTestCase.createSource([
        "f(double x, double y) {",
        "  var v = (x / y).toInt();",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DIVISION_OPTIMIZATION]);
    verify([source]);
  }

  void test_divisionOptimization_int() {
    Source source = addSource(EngineTestCase.createSource(["f(int x, int y) {", "  var v = (x / y).toInt();", "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DIVISION_OPTIMIZATION]);
    verify([source]);
  }

  void test_divisionOptimization_propagatedType() {
    // Tests the propagated type information of the '/' method
    Source source = addSource(EngineTestCase.createSource([
        "f(x, y) {",
        "  x = 1;",
        "  y = 1;",
        "  var v = (x / y).toInt();",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DIVISION_OPTIMIZATION]);
    verify([source]);
  }

  void test_divisionOptimization_wrappedBinaryExpression() {
    Source source = addSource(EngineTestCase.createSource([
        "f(int x, int y) {",
        "  var v = (((x / y))).toInt();",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.DIVISION_OPTIMIZATION]);
    verify([source]);
  }

  void test_duplicateImport() {
    Source source = addSource(EngineTestCase.createSource([
        "library L;",
        "import 'lib1.dart';",
        "import 'lib1.dart';",
        "A a;"]));
    addNamedSource("/lib1.dart", EngineTestCase.createSource(["library lib1;", "class A {}"]));
    resolve(source);
    assertErrors(source, [HintCode.DUPLICATE_IMPORT]);
    verify([source]);
  }

  void test_duplicateImport2() {
    Source source = addSource(EngineTestCase.createSource([
        "library L;",
        "import 'lib1.dart';",
        "import 'lib1.dart';",
        "import 'lib1.dart';",
        "A a;"]));
    addNamedSource("/lib1.dart", EngineTestCase.createSource(["library lib1;", "class A {}"]));
    resolve(source);
    assertErrors(source, [HintCode.DUPLICATE_IMPORT, HintCode.DUPLICATE_IMPORT]);
    verify([source]);
  }

  void test_duplicateImport3() {
    Source source = addSource(EngineTestCase.createSource([
        "library L;",
        "import 'lib1.dart' as M show A hide B;",
        "import 'lib1.dart' as M show A hide B;",
        "M.A a;"]));
    addNamedSource("/lib1.dart", EngineTestCase.createSource(["library lib1;", "class A {}", "class B {}"]));
    resolve(source);
    assertErrors(source, [HintCode.DUPLICATE_IMPORT]);
    verify([source]);
  }

  void test_importDeferredLibraryWithLoadFunction() {
    resolveWithAndWithoutExperimental(<String> [
        EngineTestCase.createSource(["library lib1;", "loadLibrary() {}", "f() {}"]),
        EngineTestCase.createSource([
        "library root;",
        "import 'lib1.dart' deferred as lib1;",
        "main() { lib1.f(); }"])], <ErrorCode> [ParserErrorCode.DEFERRED_IMPORTS_NOT_SUPPORTED], <ErrorCode> [HintCode.IMPORT_DEFERRED_LIBRARY_WITH_LOAD_FUNCTION]);
  }

  void test_invalidAssignment_instanceVariable() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  int x;",
        "}",
        "f(var y) {",
        "  A a;",
        "  if(y is String) {",
        "    a.x = y;",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.INVALID_ASSIGNMENT]);
    verify([source]);
  }

  void test_invalidAssignment_localVariable() {
    Source source = addSource(EngineTestCase.createSource([
        "f(var y) {",
        "  if(y is String) {",
        "    int x = y;",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.INVALID_ASSIGNMENT]);
    verify([source]);
  }

  void test_invalidAssignment_message() {
    // The implementation of HintCode.INVALID_ASSIGNMENT assumes that
    // StaticTypeWarningCode.INVALID_ASSIGNMENT has the same message.
    JUnitTestCase.assertEquals(HintCode.INVALID_ASSIGNMENT.message, StaticTypeWarningCode.INVALID_ASSIGNMENT.message);
  }

  void test_invalidAssignment_staticVariable() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  static int x;",
        "}",
        "f(var y) {",
        "  if(y is String) {",
        "    A.x = y;",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.INVALID_ASSIGNMENT]);
    verify([source]);
  }

  void test_invalidAssignment_variableDeclaration() {
    // 17971
    Source source = addSource(EngineTestCase.createSource([
        "class Point {",
        "  final num x, y;",
        "  Point(this.x, this.y);",
        "  Point operator +(Point other) {",
        "    return new Point(x+other.x, y+other.y);",
        "  }",
        "}",
        "main() {",
        "  var p1 = new Point(0, 0);",
        "  var p2 = new Point(10, 10);",
        "  int n = p1 + p2;",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.INVALID_ASSIGNMENT]);
    verify([source]);
  }

  void test_isDouble() {
    Source source = addSource(EngineTestCase.createSource(["var v = 1 is double;"]));
    resolve(source);
    assertErrors(source, [HintCode.IS_DOUBLE]);
    verify([source]);
  }

  void test_isNotDouble() {
    Source source = addSource(EngineTestCase.createSource(["var v = 1 is! double;"]));
    resolve(source);
    assertErrors(source, [HintCode.IS_NOT_DOUBLE]);
    verify([source]);
  }

  void test_missingReturn_function() {
    Source source = addSource(EngineTestCase.createSource(["int f() {}"]));
    resolve(source);
    assertErrors(source, [HintCode.MISSING_RETURN]);
    verify([source]);
  }

  void test_missingReturn_method() {
    Source source = addSource(EngineTestCase.createSource(["class A {", "  int m() {}", "}"]));
    resolve(source);
    assertErrors(source, [HintCode.MISSING_RETURN]);
    verify([source]);
  }

  void test_overrideOnNonOverridingGetter_invalid() {
    Source source = addSource(EngineTestCase.createSource([
        "library dart.core;",
        "const override = null;",
        "class A {",
        "}",
        "class B extends A {",
        "  @override",
        "  int get m => 1;",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.OVERRIDE_ON_NON_OVERRIDING_GETTER]);
    verify([source]);
  }

  void test_overrideOnNonOverridingMethod_invalid() {
    Source source = addSource(EngineTestCase.createSource([
        "library dart.core;",
        "const override = null;",
        "class A {",
        "}",
        "class B extends A {",
        "  @override",
        "  int m() => 1;",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.OVERRIDE_ON_NON_OVERRIDING_METHOD]);
    verify([source]);
  }

  void test_overrideOnNonOverridingSetter_invalid() {
    Source source = addSource(EngineTestCase.createSource([
        "library dart.core;",
        "const override = null;",
        "class A {",
        "}",
        "class B extends A {",
        "  @override",
        "  set m(int x) {}",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.OVERRIDE_ON_NON_OVERRIDING_SETTER]);
    verify([source]);
  }

  void test_typeCheck_type_is_Null() {
    Source source = addSource(EngineTestCase.createSource(["m(i) {", "  bool b = i is Null;", "}"]));
    resolve(source);
    assertErrors(source, [HintCode.TYPE_CHECK_IS_NULL]);
    verify([source]);
  }

  void test_typeCheck_type_not_Null() {
    Source source = addSource(EngineTestCase.createSource(["m(i) {", "  bool b = i is! Null;", "}"]));
    resolve(source);
    assertErrors(source, [HintCode.TYPE_CHECK_IS_NOT_NULL]);
    verify([source]);
  }

  void test_undefinedGetter() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "f(var a) {",
        "  if(a is A) {",
        "    return a.m;",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.UNDEFINED_GETTER]);
  }

  void test_undefinedGetter_message() {
    // The implementation of HintCode.UNDEFINED_SETTER assumes that UNDEFINED_SETTER in
    // StaticTypeWarningCode and StaticWarningCode are the same, this verifies that assumption.
    JUnitTestCase.assertEquals(StaticTypeWarningCode.UNDEFINED_GETTER.message, StaticWarningCode.UNDEFINED_GETTER.message);
  }

  void test_undefinedMethod() {
    Source source = addSource(EngineTestCase.createSource([
        "f() {",
        "  var a = 'str';",
        "  a.notAMethodOnString();",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.UNDEFINED_METHOD]);
  }

  void test_undefinedMethod_assignmentExpression() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "class B {",
        "  f(var a, var a2) {",
        "    a = new A();",
        "    a2 = new A();",
        "    a += a2;",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.UNDEFINED_METHOD]);
  }

  void test_undefinedMethod_unionType_noSuchMethod() {
    enableUnionTypes(false);
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  int m(int x) => 0;",
        "}",
        "class B {",
        "  String m() => '0';",
        "}",
        "f(A a, B b) {",
        "  var ab;",
        "  if (0 < 1) {",
        "    ab = a;",
        "  } else {",
        "    ab = b;",
        "  }",
        "  ab.n();",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.UNDEFINED_METHOD]);
  }

  void test_undefinedOperator_binaryExpression() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "f(var a) {",
        "  if(a is A) {",
        "    a + 1;",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.UNDEFINED_OPERATOR]);
  }

  void test_undefinedOperator_indexBoth() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "f(var a) {",
        "  if(a is A) {",
        "    a[0]++;",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.UNDEFINED_OPERATOR]);
  }

  void test_undefinedOperator_indexGetter() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "f(var a) {",
        "  if(a is A) {",
        "    a[0];",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.UNDEFINED_OPERATOR]);
  }

  void test_undefinedOperator_indexSetter() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "f(var a) {",
        "  if(a is A) {",
        "    a[0] = 1;",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.UNDEFINED_OPERATOR]);
  }

  void test_undefinedOperator_postfixExpression() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "f(var a) {",
        "  if(a is A) {",
        "    a++;",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.UNDEFINED_OPERATOR]);
  }

  void test_undefinedOperator_prefixExpression() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "f(var a) {",
        "  if(a is A) {",
        "    ++a;",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.UNDEFINED_OPERATOR]);
  }

  void test_undefinedSetter() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "f(var a) {",
        "  if(a is A) {",
        "    a.m = 0;",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.UNDEFINED_SETTER]);
  }

  void test_undefinedSetter_message() {
    // The implementation of HintCode.UNDEFINED_SETTER assumes that UNDEFINED_SETTER in
    // StaticTypeWarningCode and StaticWarningCode are the same, this verifies that assumption.
    JUnitTestCase.assertEquals(StaticTypeWarningCode.UNDEFINED_SETTER.message, StaticWarningCode.UNDEFINED_SETTER.message);
  }

  void test_unnecessaryCast_type_supertype() {
    Source source = addSource(EngineTestCase.createSource(["m(int i) {", "  var b = i as Object;", "}"]));
    resolve(source);
    assertErrors(source, [HintCode.UNNECESSARY_CAST]);
    verify([source]);
  }

  void test_unnecessaryCast_type_type() {
    Source source = addSource(EngineTestCase.createSource(["m(num i) {", "  var b = i as num;", "}"]));
    resolve(source);
    assertErrors(source, [HintCode.UNNECESSARY_CAST]);
    verify([source]);
  }

  void test_unnecessaryTypeCheck_null_is_Null() {
    Source source = addSource(EngineTestCase.createSource(["bool b = null is Null;"]));
    resolve(source);
    assertErrors(source, [HintCode.UNNECESSARY_TYPE_CHECK_TRUE]);
    verify([source]);
  }

  void test_unnecessaryTypeCheck_null_not_Null() {
    Source source = addSource(EngineTestCase.createSource(["bool b = null is! Null;"]));
    resolve(source);
    assertErrors(source, [HintCode.UNNECESSARY_TYPE_CHECK_FALSE]);
    verify([source]);
  }

  void test_unnecessaryTypeCheck_type_is_dynamic() {
    Source source = addSource(EngineTestCase.createSource(["m(i) {", "  bool b = i is dynamic;", "}"]));
    resolve(source);
    assertErrors(source, [HintCode.UNNECESSARY_TYPE_CHECK_TRUE]);
    verify([source]);
  }

  void test_unnecessaryTypeCheck_type_is_object() {
    Source source = addSource(EngineTestCase.createSource(["m(i) {", "  bool b = i is Object;", "}"]));
    resolve(source);
    assertErrors(source, [HintCode.UNNECESSARY_TYPE_CHECK_TRUE]);
    verify([source]);
  }

  void test_unnecessaryTypeCheck_type_not_dynamic() {
    Source source = addSource(EngineTestCase.createSource(["m(i) {", "  bool b = i is! dynamic;", "}"]));
    resolve(source);
    assertErrors(source, [HintCode.UNNECESSARY_TYPE_CHECK_FALSE]);
    verify([source]);
  }

  void test_unnecessaryTypeCheck_type_not_object() {
    Source source = addSource(EngineTestCase.createSource(["m(i) {", "  bool b = i is! Object;", "}"]));
    resolve(source);
    assertErrors(source, [HintCode.UNNECESSARY_TYPE_CHECK_FALSE]);
    verify([source]);
  }

  void test_unusedImport() {
    Source source = addSource(EngineTestCase.createSource(["library L;", "import 'lib1.dart';"]));
    Source source2 = addNamedSource("/lib1.dart", EngineTestCase.createSource(["library lib1;"]));
    resolve(source);
    assertErrors(source, [HintCode.UNUSED_IMPORT]);
    assertNoErrors(source2);
    verify([source, source2]);
  }

  void test_unusedImport_as() {
    Source source = addSource(EngineTestCase.createSource([
        "library L;",
        "import 'lib1.dart';",
        "import 'lib1.dart' as one;",
        "one.A a;"]));
    Source source2 = addNamedSource("/lib1.dart", EngineTestCase.createSource(["library lib1;", "class A {}"]));
    resolve(source);
    assertErrors(source, [HintCode.UNUSED_IMPORT]);
    assertNoErrors(source2);
    verify([source, source2]);
  }

  void test_unusedImport_hide() {
    Source source = addSource(EngineTestCase.createSource([
        "library L;",
        "import 'lib1.dart';",
        "import 'lib1.dart' hide A;",
        "A a;"]));
    Source source2 = addNamedSource("/lib1.dart", EngineTestCase.createSource(["library lib1;", "class A {}"]));
    resolve(source);
    assertErrors(source, [HintCode.UNUSED_IMPORT]);
    assertNoErrors(source2);
    verify([source, source2]);
  }

  void test_unusedImport_show() {
    Source source = addSource(EngineTestCase.createSource([
        "library L;",
        "import 'lib1.dart' show A;",
        "import 'lib1.dart' show B;",
        "A a;"]));
    Source source2 = addNamedSource("/lib1.dart", EngineTestCase.createSource(["library lib1;", "class A {}", "class B {}"]));
    resolve(source);
    assertErrors(source, [HintCode.UNUSED_IMPORT]);
    assertNoErrors(source2);
    verify([source, source2]);
  }

  void test_useOfVoidResult_assignmentExpression_function() {
    Source source = addSource(EngineTestCase.createSource([
        "void f() {}",
        "class A {",
        "  n() {",
        "    var a;",
        "    a = f();",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.USE_OF_VOID_RESULT]);
    verify([source]);
  }

  void test_useOfVoidResult_assignmentExpression_method() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  void m() {}",
        "  n() {",
        "    var a;",
        "    a = m();",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.USE_OF_VOID_RESULT]);
    verify([source]);
  }

  void test_useOfVoidResult_inForLoop() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  void m() {}",
        "  n() {",
        "    for(var a = m();;) {}",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.USE_OF_VOID_RESULT]);
    verify([source]);
  }

  void test_useOfVoidResult_variableDeclaration_function() {
    Source source = addSource(EngineTestCase.createSource([
        "void f() {}",
        "class A {",
        "  n() {",
        "    var a = f();",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.USE_OF_VOID_RESULT]);
    verify([source]);
  }

  void test_useOfVoidResult_variableDeclaration_method() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  void m() {}",
        "  n() {",
        "    var a = m();",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.USE_OF_VOID_RESULT]);
    verify([source]);
  }

  void test_useOfVoidResult_variableDeclaration_method2() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  void m() {}",
        "  n() {",
        "    var a = m(), b = m();",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [HintCode.USE_OF_VOID_RESULT, HintCode.USE_OF_VOID_RESULT]);
    verify([source]);
  }
}

class IncrementalResolverTest extends ResolverTestCase {
  void test_resolve() {
    MethodDeclaration method = _resolveMethod(EngineTestCase.createSource([
        "class C {",
        "  int m(int a) {",
        "    return a + a;",
        "  }",
        "}"]));
    BlockFunctionBody body = method.body as BlockFunctionBody;
    ReturnStatement statement = body.block.statements[0] as ReturnStatement;
    BinaryExpression expression = statement.expression as BinaryExpression;
    SimpleIdentifier left = expression.leftOperand as SimpleIdentifier;
    Element leftElement = left.staticElement;
    SimpleIdentifier right = expression.rightOperand as SimpleIdentifier;
    Element rightElement = right.staticElement;
    JUnitTestCase.assertNotNull(leftElement);
    JUnitTestCase.assertSame(leftElement, rightElement);
  }

  MethodDeclaration _resolveMethod(String content) {
    Source source = addSource(content);
    LibraryElement library = resolve(source);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    ClassDeclaration classNode = unit.declarations[0] as ClassDeclaration;
    MethodDeclaration method = classNode.members[0] as MethodDeclaration;
    method.body.accept(new ResolutionEraser());
    GatheringErrorListener errorListener = new GatheringErrorListener();
    IncrementalResolver resolver = new IncrementalResolver(library, source, typeProvider, errorListener);
    resolver.resolve(method.body);
    return method;
  }
}

class InheritanceManagerTest extends EngineTestCase {
  /**
   * The type provider used to access the types.
   */
  TestTypeProvider _typeProvider;

  /**
   * The library containing the code being resolved.
   */
  LibraryElementImpl _definingLibrary;

  /**
   * The inheritance manager being tested.
   */
  InheritanceManager _inheritanceManager;

  /**
   * The number of members that Object implements (as determined by [TestTypeProvider]).
   */
  int _numOfMembersInObject = 0;

  @override
  void setUp() {
    _typeProvider = new TestTypeProvider();
    _inheritanceManager = _createInheritanceManager();
    InterfaceType objectType = _typeProvider.objectType;
    _numOfMembersInObject = objectType.methods.length + objectType.accessors.length;
  }

  void test_getMapOfMembersInheritedFromClasses_accessor_extends() {
    // class A { int get g; }
    // class B extends A {}
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String getterName = "g";
    PropertyAccessorElement getterG = ElementFactory.getterElement(getterName, false, _typeProvider.intType);
    classA.accessors = <PropertyAccessorElement> [getterG];
    ClassElementImpl classB = ElementFactory.classElement("B", classA.type, []);
    MemberMap mapB = _inheritanceManager.getMapOfMembersInheritedFromClasses(classB);
    MemberMap mapA = _inheritanceManager.getMapOfMembersInheritedFromClasses(classA);
    JUnitTestCase.assertEquals(_numOfMembersInObject, mapA.size);
    JUnitTestCase.assertEquals(_numOfMembersInObject + 1, mapB.size);
    JUnitTestCase.assertSame(getterG, mapB.get(getterName));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
  }

  void test_getMapOfMembersInheritedFromClasses_accessor_implements() {
    // class A { int get g; }
    // class B implements A {}
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String getterName = "g";
    PropertyAccessorElement getterG = ElementFactory.getterElement(getterName, false, _typeProvider.intType);
    classA.accessors = <PropertyAccessorElement> [getterG];
    ClassElementImpl classB = ElementFactory.classElement2("B", []);
    classB.interfaces = <InterfaceType> [classA.type];
    MemberMap mapB = _inheritanceManager.getMapOfMembersInheritedFromClasses(classB);
    MemberMap mapA = _inheritanceManager.getMapOfMembersInheritedFromClasses(classA);
    JUnitTestCase.assertEquals(_numOfMembersInObject, mapA.size);
    JUnitTestCase.assertEquals(_numOfMembersInObject, mapB.size);
    JUnitTestCase.assertNull(mapB.get(getterName));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
  }

  void test_getMapOfMembersInheritedFromClasses_accessor_with() {
    // class A { int get g; }
    // class B extends Object with A {}
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String getterName = "g";
    PropertyAccessorElement getterG = ElementFactory.getterElement(getterName, false, _typeProvider.intType);
    classA.accessors = <PropertyAccessorElement> [getterG];
    ClassElementImpl classB = ElementFactory.classElement2("B", []);
    classB.mixins = <InterfaceType> [classA.type];
    MemberMap mapB = _inheritanceManager.getMapOfMembersInheritedFromClasses(classB);
    MemberMap mapA = _inheritanceManager.getMapOfMembersInheritedFromClasses(classA);
    JUnitTestCase.assertEquals(_numOfMembersInObject, mapA.size);
    JUnitTestCase.assertEquals(_numOfMembersInObject + 1, mapB.size);
    JUnitTestCase.assertSame(getterG, mapB.get(getterName));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
  }

  void test_getMapOfMembersInheritedFromClasses_implicitExtends() {
    // class A {}
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    MemberMap mapA = _inheritanceManager.getMapOfMembersInheritedFromClasses(classA);
    JUnitTestCase.assertEquals(_numOfMembersInObject, mapA.size);
    _assertNoErrors(classA);
  }

  void test_getMapOfMembersInheritedFromClasses_method_extends() {
    // class A { int g(); }
    // class B extends A {}
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String methodName = "m";
    MethodElement methodM = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    classA.methods = <MethodElement> [methodM];
    ClassElementImpl classB = ElementFactory.classElement2("B", []);
    classB.supertype = classA.type;
    MemberMap mapB = _inheritanceManager.getMapOfMembersInheritedFromClasses(classB);
    MemberMap mapA = _inheritanceManager.getMapOfMembersInheritedFromClasses(classA);
    JUnitTestCase.assertEquals(_numOfMembersInObject, mapA.size);
    JUnitTestCase.assertEquals(_numOfMembersInObject + 1, mapB.size);
    JUnitTestCase.assertSame(methodM, mapB.get(methodName));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
  }

  void test_getMapOfMembersInheritedFromClasses_method_implements() {
    // class A { int g(); }
    // class B implements A {}
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String methodName = "m";
    MethodElement methodM = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    classA.methods = <MethodElement> [methodM];
    ClassElementImpl classB = ElementFactory.classElement2("B", []);
    classB.interfaces = <InterfaceType> [classA.type];
    MemberMap mapB = _inheritanceManager.getMapOfMembersInheritedFromClasses(classB);
    MemberMap mapA = _inheritanceManager.getMapOfMembersInheritedFromClasses(classA);
    JUnitTestCase.assertEquals(_numOfMembersInObject, mapA.size);
    JUnitTestCase.assertEquals(_numOfMembersInObject, mapB.size);
    JUnitTestCase.assertNull(mapB.get(methodName));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
  }

  void test_getMapOfMembersInheritedFromClasses_method_with() {
    // class A { int g(); }
    // class B extends Object with A {}
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String methodName = "m";
    MethodElement methodM = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    classA.methods = <MethodElement> [methodM];
    ClassElementImpl classB = ElementFactory.classElement2("B", []);
    classB.mixins = <InterfaceType> [classA.type];
    MemberMap mapB = _inheritanceManager.getMapOfMembersInheritedFromClasses(classB);
    MemberMap mapA = _inheritanceManager.getMapOfMembersInheritedFromClasses(classA);
    JUnitTestCase.assertEquals(_numOfMembersInObject, mapA.size);
    JUnitTestCase.assertEquals(_numOfMembersInObject + 1, mapB.size);
    JUnitTestCase.assertSame(methodM, mapB.get(methodName));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
  }

  void test_getMapOfMembersInheritedFromInterfaces_accessor_extends() {
    // class A { int get g; }
    // class B extends A {}
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String getterName = "g";
    PropertyAccessorElement getterG = ElementFactory.getterElement(getterName, false, _typeProvider.intType);
    classA.accessors = <PropertyAccessorElement> [getterG];
    ClassElementImpl classB = ElementFactory.classElement("B", classA.type, []);
    MemberMap mapB = _inheritanceManager.getMapOfMembersInheritedFromInterfaces(classB);
    MemberMap mapA = _inheritanceManager.getMapOfMembersInheritedFromInterfaces(classA);
    JUnitTestCase.assertEquals(_numOfMembersInObject, mapA.size);
    JUnitTestCase.assertEquals(_numOfMembersInObject + 1, mapB.size);
    JUnitTestCase.assertSame(getterG, mapB.get(getterName));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
  }

  void test_getMapOfMembersInheritedFromInterfaces_accessor_implements() {
    // class A { int get g; }
    // class B implements A {}
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String getterName = "g";
    PropertyAccessorElement getterG = ElementFactory.getterElement(getterName, false, _typeProvider.intType);
    classA.accessors = <PropertyAccessorElement> [getterG];
    ClassElementImpl classB = ElementFactory.classElement2("B", []);
    classB.interfaces = <InterfaceType> [classA.type];
    MemberMap mapB = _inheritanceManager.getMapOfMembersInheritedFromInterfaces(classB);
    MemberMap mapA = _inheritanceManager.getMapOfMembersInheritedFromInterfaces(classA);
    JUnitTestCase.assertEquals(_numOfMembersInObject, mapA.size);
    JUnitTestCase.assertEquals(_numOfMembersInObject + 1, mapB.size);
    JUnitTestCase.assertSame(getterG, mapB.get(getterName));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
  }

  void test_getMapOfMembersInheritedFromInterfaces_accessor_with() {
    // class A { int get g; }
    // class B extends Object with A {}
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String getterName = "g";
    PropertyAccessorElement getterG = ElementFactory.getterElement(getterName, false, _typeProvider.intType);
    classA.accessors = <PropertyAccessorElement> [getterG];
    ClassElementImpl classB = ElementFactory.classElement2("B", []);
    classB.mixins = <InterfaceType> [classA.type];
    MemberMap mapB = _inheritanceManager.getMapOfMembersInheritedFromInterfaces(classB);
    MemberMap mapA = _inheritanceManager.getMapOfMembersInheritedFromInterfaces(classA);
    JUnitTestCase.assertEquals(_numOfMembersInObject, mapA.size);
    JUnitTestCase.assertEquals(_numOfMembersInObject + 1, mapB.size);
    JUnitTestCase.assertSame(getterG, mapB.get(getterName));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
  }

  void test_getMapOfMembersInheritedFromInterfaces_implicitExtends() {
    // class A {}
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    MemberMap mapA = _inheritanceManager.getMapOfMembersInheritedFromInterfaces(classA);
    JUnitTestCase.assertEquals(_numOfMembersInObject, mapA.size);
    _assertNoErrors(classA);
  }

  void test_getMapOfMembersInheritedFromInterfaces_inconsistentMethodInheritance_getter_method() {
    // class I1 { int m(); }
    // class I2 { int get m; }
    // class A implements I2, I1 {}
    ClassElementImpl classI1 = ElementFactory.classElement2("I1", []);
    String methodName = "m";
    MethodElement methodM = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    classI1.methods = <MethodElement> [methodM];
    ClassElementImpl classI2 = ElementFactory.classElement2("I2", []);
    PropertyAccessorElement getter = ElementFactory.getterElement(methodName, false, _typeProvider.intType);
    classI2.accessors = <PropertyAccessorElement> [getter];
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    classA.interfaces = <InterfaceType> [classI2.type, classI1.type];
    MemberMap mapA = _inheritanceManager.getMapOfMembersInheritedFromInterfaces(classA);
    JUnitTestCase.assertEquals(_numOfMembersInObject, mapA.size);
    JUnitTestCase.assertNull(mapA.get(methodName));
    _assertErrors(classA, [StaticWarningCode.INCONSISTENT_METHOD_INHERITANCE_GETTER_AND_METHOD]);
  }

  void test_getMapOfMembersInheritedFromInterfaces_inconsistentMethodInheritance_int_str() {
    // class I1 { int m(); }
    // class I2 { String m(); }
    // class A implements I1, I2 {}
    ClassElementImpl classI1 = ElementFactory.classElement2("I1", []);
    String methodName = "m";
    MethodElement methodM1 = ElementFactory.methodElement(methodName, null, [_typeProvider.intType]);
    classI1.methods = <MethodElement> [methodM1];
    ClassElementImpl classI2 = ElementFactory.classElement2("I2", []);
    MethodElement methodM2 = ElementFactory.methodElement(methodName, null, [_typeProvider.stringType]);
    classI2.methods = <MethodElement> [methodM2];
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    classA.interfaces = <InterfaceType> [classI1.type, classI2.type];
    MemberMap mapA = _inheritanceManager.getMapOfMembersInheritedFromInterfaces(classA);
    JUnitTestCase.assertEquals(_numOfMembersInObject, mapA.size);
    JUnitTestCase.assertNull(mapA.get(methodName));
    _assertErrors(classA, [StaticTypeWarningCode.INCONSISTENT_METHOD_INHERITANCE]);
  }

  void test_getMapOfMembersInheritedFromInterfaces_inconsistentMethodInheritance_method_getter() {
    // class I1 { int m(); }
    // class I2 { int get m; }
    // class A implements I1, I2 {}
    ClassElementImpl classI1 = ElementFactory.classElement2("I1", []);
    String methodName = "m";
    MethodElement methodM = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    classI1.methods = <MethodElement> [methodM];
    ClassElementImpl classI2 = ElementFactory.classElement2("I2", []);
    PropertyAccessorElement getter = ElementFactory.getterElement(methodName, false, _typeProvider.intType);
    classI2.accessors = <PropertyAccessorElement> [getter];
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    classA.interfaces = <InterfaceType> [classI1.type, classI2.type];
    MemberMap mapA = _inheritanceManager.getMapOfMembersInheritedFromInterfaces(classA);
    JUnitTestCase.assertEquals(_numOfMembersInObject, mapA.size);
    JUnitTestCase.assertNull(mapA.get(methodName));
    _assertErrors(classA, [StaticWarningCode.INCONSISTENT_METHOD_INHERITANCE_GETTER_AND_METHOD]);
  }

  void test_getMapOfMembersInheritedFromInterfaces_inconsistentMethodInheritance_numOfRequiredParams() {
    // class I1 { dynamic m(int, [int]); }
    // class I2 { dynamic m(int, int, int); }
    // class A implements I1, I2 {}
    ClassElementImpl classI1 = ElementFactory.classElement2("I1", []);
    String methodName = "m";
    MethodElementImpl methodM1 = ElementFactory.methodElement(methodName, _typeProvider.dynamicType, []);
    ParameterElementImpl parameter1 = new ParameterElementImpl.forNode(AstFactory.identifier3("a1"));
    parameter1.type = _typeProvider.intType;
    parameter1.parameterKind = ParameterKind.REQUIRED;
    ParameterElementImpl parameter2 = new ParameterElementImpl.forNode(AstFactory.identifier3("a2"));
    parameter2.type = _typeProvider.intType;
    parameter2.parameterKind = ParameterKind.POSITIONAL;
    methodM1.parameters = <ParameterElement> [parameter1, parameter2];
    classI1.methods = <MethodElement> [methodM1];
    ClassElementImpl classI2 = ElementFactory.classElement2("I2", []);
    MethodElementImpl methodM2 = ElementFactory.methodElement(methodName, _typeProvider.dynamicType, []);
    ParameterElementImpl parameter3 = new ParameterElementImpl.forNode(AstFactory.identifier3("a3"));
    parameter3.type = _typeProvider.intType;
    parameter3.parameterKind = ParameterKind.REQUIRED;
    ParameterElementImpl parameter4 = new ParameterElementImpl.forNode(AstFactory.identifier3("a4"));
    parameter4.type = _typeProvider.intType;
    parameter4.parameterKind = ParameterKind.REQUIRED;
    ParameterElementImpl parameter5 = new ParameterElementImpl.forNode(AstFactory.identifier3("a5"));
    parameter5.type = _typeProvider.intType;
    parameter5.parameterKind = ParameterKind.REQUIRED;
    methodM2.parameters = <ParameterElement> [parameter3, parameter4, parameter5];
    classI2.methods = <MethodElement> [methodM2];
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    classA.interfaces = <InterfaceType> [classI1.type, classI2.type];
    MemberMap mapA = _inheritanceManager.getMapOfMembersInheritedFromInterfaces(classA);
    JUnitTestCase.assertEquals(_numOfMembersInObject, mapA.size);
    JUnitTestCase.assertNull(mapA.get(methodName));
    _assertErrors(classA, [StaticTypeWarningCode.INCONSISTENT_METHOD_INHERITANCE]);
  }

  void test_getMapOfMembersInheritedFromInterfaces_inconsistentMethodInheritance_str_int() {
    // class I1 { int m(); }
    // class I2 { String m(); }
    // class A implements I2, I1 {}
    ClassElementImpl classI1 = ElementFactory.classElement2("I1", []);
    String methodName = "m";
    MethodElement methodM1 = ElementFactory.methodElement(methodName, null, [_typeProvider.stringType]);
    classI1.methods = <MethodElement> [methodM1];
    ClassElementImpl classI2 = ElementFactory.classElement2("I2", []);
    MethodElement methodM2 = ElementFactory.methodElement(methodName, null, [_typeProvider.intType]);
    classI2.methods = <MethodElement> [methodM2];
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    classA.interfaces = <InterfaceType> [classI2.type, classI1.type];
    MemberMap mapA = _inheritanceManager.getMapOfMembersInheritedFromInterfaces(classA);
    JUnitTestCase.assertEquals(_numOfMembersInObject, mapA.size);
    JUnitTestCase.assertNull(mapA.get(methodName));
    _assertErrors(classA, [StaticTypeWarningCode.INCONSISTENT_METHOD_INHERITANCE]);
  }

  void test_getMapOfMembersInheritedFromInterfaces_method_extends() {
    // class A { int g(); }
    // class B extends A {}
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String methodName = "m";
    MethodElement methodM = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    classA.methods = <MethodElement> [methodM];
    ClassElementImpl classB = ElementFactory.classElement("B", classA.type, []);
    MemberMap mapB = _inheritanceManager.getMapOfMembersInheritedFromInterfaces(classB);
    MemberMap mapA = _inheritanceManager.getMapOfMembersInheritedFromInterfaces(classA);
    JUnitTestCase.assertEquals(_numOfMembersInObject, mapA.size);
    JUnitTestCase.assertEquals(_numOfMembersInObject + 1, mapB.size);
    JUnitTestCase.assertSame(methodM, mapB.get(methodName));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
  }

  void test_getMapOfMembersInheritedFromInterfaces_method_implements() {
    // class A { int g(); }
    // class B implements A {}
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String methodName = "m";
    MethodElement methodM = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    classA.methods = <MethodElement> [methodM];
    ClassElementImpl classB = ElementFactory.classElement2("B", []);
    classB.interfaces = <InterfaceType> [classA.type];
    MemberMap mapB = _inheritanceManager.getMapOfMembersInheritedFromInterfaces(classB);
    MemberMap mapA = _inheritanceManager.getMapOfMembersInheritedFromInterfaces(classA);
    JUnitTestCase.assertEquals(_numOfMembersInObject, mapA.size);
    JUnitTestCase.assertEquals(_numOfMembersInObject + 1, mapB.size);
    JUnitTestCase.assertSame(methodM, mapB.get(methodName));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
  }

  void test_getMapOfMembersInheritedFromInterfaces_method_with() {
    // class A { int g(); }
    // class B extends Object with A {}
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String methodName = "m";
    MethodElement methodM = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    classA.methods = <MethodElement> [methodM];
    ClassElementImpl classB = ElementFactory.classElement2("B", []);
    classB.mixins = <InterfaceType> [classA.type];
    MemberMap mapB = _inheritanceManager.getMapOfMembersInheritedFromInterfaces(classB);
    MemberMap mapA = _inheritanceManager.getMapOfMembersInheritedFromInterfaces(classA);
    JUnitTestCase.assertEquals(_numOfMembersInObject, mapA.size);
    JUnitTestCase.assertEquals(_numOfMembersInObject + 1, mapB.size);
    JUnitTestCase.assertSame(methodM, mapB.get(methodName));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
  }

  void test_getMapOfMembersInheritedFromInterfaces_union_differentNames() {
    // class I1 { int m1(); }
    // class I2 { int m2(); }
    // class A implements I1, I2 {}
    ClassElementImpl classI1 = ElementFactory.classElement2("I1", []);
    String methodName1 = "m1";
    MethodElement methodM1 = ElementFactory.methodElement(methodName1, _typeProvider.intType, []);
    classI1.methods = <MethodElement> [methodM1];
    ClassElementImpl classI2 = ElementFactory.classElement2("I2", []);
    String methodName2 = "m2";
    MethodElement methodM2 = ElementFactory.methodElement(methodName2, _typeProvider.intType, []);
    classI2.methods = <MethodElement> [methodM2];
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    classA.interfaces = <InterfaceType> [classI1.type, classI2.type];
    MemberMap mapA = _inheritanceManager.getMapOfMembersInheritedFromInterfaces(classA);
    JUnitTestCase.assertEquals(_numOfMembersInObject + 2, mapA.size);
    JUnitTestCase.assertSame(methodM1, mapA.get(methodName1));
    JUnitTestCase.assertSame(methodM2, mapA.get(methodName2));
    _assertNoErrors(classA);
  }

  void test_getMapOfMembersInheritedFromInterfaces_union_multipleSubtypes_2_getters() {
    // class I1 { int get g; }
    // class I2 { num get g; }
    // class A implements I1, I2 {}
    ClassElementImpl classI1 = ElementFactory.classElement2("I1", []);
    String accessorName = "g";
    PropertyAccessorElement getter1 = ElementFactory.getterElement(accessorName, false, _typeProvider.intType);
    classI1.accessors = <PropertyAccessorElement> [getter1];
    ClassElementImpl classI2 = ElementFactory.classElement2("I2", []);
    PropertyAccessorElement getter2 = ElementFactory.getterElement(accessorName, false, _typeProvider.numType);
    classI2.accessors = <PropertyAccessorElement> [getter2];
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    classA.interfaces = <InterfaceType> [classI1.type, classI2.type];
    MemberMap mapA = _inheritanceManager.getMapOfMembersInheritedFromInterfaces(classA);
    JUnitTestCase.assertEquals(_numOfMembersInObject + 1, mapA.size);
    PropertyAccessorElement syntheticAccessor = ElementFactory.getterElement(accessorName, false, _typeProvider.dynamicType);
    JUnitTestCase.assertEquals(syntheticAccessor.type, mapA.get(accessorName).type);
    _assertNoErrors(classA);
  }

  void test_getMapOfMembersInheritedFromInterfaces_union_multipleSubtypes_2_methods() {
    // class I1 { dynamic m(int); }
    // class I2 { dynamic m(num); }
    // class A implements I1, I2 {}
    ClassElementImpl classI1 = ElementFactory.classElement2("I1", []);
    String methodName = "m";
    MethodElementImpl methodM1 = ElementFactory.methodElement(methodName, _typeProvider.dynamicType, []);
    ParameterElementImpl parameter1 = new ParameterElementImpl.forNode(AstFactory.identifier3("a0"));
    parameter1.type = _typeProvider.intType;
    parameter1.parameterKind = ParameterKind.REQUIRED;
    methodM1.parameters = <ParameterElement> [parameter1];
    classI1.methods = <MethodElement> [methodM1];
    ClassElementImpl classI2 = ElementFactory.classElement2("I2", []);
    MethodElementImpl methodM2 = ElementFactory.methodElement(methodName, _typeProvider.dynamicType, []);
    ParameterElementImpl parameter2 = new ParameterElementImpl.forNode(AstFactory.identifier3("a0"));
    parameter2.type = _typeProvider.numType;
    parameter2.parameterKind = ParameterKind.REQUIRED;
    methodM2.parameters = <ParameterElement> [parameter2];
    classI2.methods = <MethodElement> [methodM2];
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    classA.interfaces = <InterfaceType> [classI1.type, classI2.type];
    MemberMap mapA = _inheritanceManager.getMapOfMembersInheritedFromInterfaces(classA);
    JUnitTestCase.assertEquals(_numOfMembersInObject + 1, mapA.size);
    MethodElement syntheticMethod = ElementFactory.methodElement(methodName, _typeProvider.dynamicType, [_typeProvider.dynamicType]);
    JUnitTestCase.assertEquals(syntheticMethod.type, mapA.get(methodName).type);
    _assertNoErrors(classA);
  }

  void test_getMapOfMembersInheritedFromInterfaces_union_multipleSubtypes_2_setters() {
    // class I1 { set s(int); }
    // class I2 { set s(num); }
    // class A implements I1, I2 {}
    ClassElementImpl classI1 = ElementFactory.classElement2("I1", []);
    String accessorName = "s";
    PropertyAccessorElement setter1 = ElementFactory.setterElement(accessorName, false, _typeProvider.intType);
    classI1.accessors = <PropertyAccessorElement> [setter1];
    ClassElementImpl classI2 = ElementFactory.classElement2("I2", []);
    PropertyAccessorElement setter2 = ElementFactory.setterElement(accessorName, false, _typeProvider.numType);
    classI2.accessors = <PropertyAccessorElement> [setter2];
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    classA.interfaces = <InterfaceType> [classI1.type, classI2.type];
    MemberMap mapA = _inheritanceManager.getMapOfMembersInheritedFromInterfaces(classA);
    JUnitTestCase.assertEquals(_numOfMembersInObject + 1, mapA.size);
    PropertyAccessorElementImpl syntheticAccessor = ElementFactory.setterElement(accessorName, false, _typeProvider.dynamicType);
    syntheticAccessor.returnType = _typeProvider.dynamicType;
    JUnitTestCase.assertEquals(syntheticAccessor.type, mapA.get("${accessorName}=").type);
    _assertNoErrors(classA);
  }

  void test_getMapOfMembersInheritedFromInterfaces_union_multipleSubtypes_3_getters() {
    // class A {}
    // class B extends A {}
    // class C extends B {}
    // class I1 { A get g; }
    // class I2 { B get g; }
    // class I3 { C get g; }
    // class D implements I1, I2, I3 {}
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    ClassElementImpl classB = ElementFactory.classElement("B", classA.type, []);
    ClassElementImpl classC = ElementFactory.classElement("C", classB.type, []);
    ClassElementImpl classI1 = ElementFactory.classElement2("I1", []);
    String accessorName = "g";
    PropertyAccessorElement getter1 = ElementFactory.getterElement(accessorName, false, classA.type);
    classI1.accessors = <PropertyAccessorElement> [getter1];
    ClassElementImpl classI2 = ElementFactory.classElement2("I2", []);
    PropertyAccessorElement getter2 = ElementFactory.getterElement(accessorName, false, classB.type);
    classI2.accessors = <PropertyAccessorElement> [getter2];
    ClassElementImpl classI3 = ElementFactory.classElement2("I3", []);
    PropertyAccessorElement getter3 = ElementFactory.getterElement(accessorName, false, classC.type);
    classI3.accessors = <PropertyAccessorElement> [getter3];
    ClassElementImpl classD = ElementFactory.classElement2("D", []);
    classD.interfaces = <InterfaceType> [classI1.type, classI2.type, classI3.type];
    MemberMap mapD = _inheritanceManager.getMapOfMembersInheritedFromInterfaces(classD);
    JUnitTestCase.assertEquals(_numOfMembersInObject + 1, mapD.size);
    PropertyAccessorElement syntheticAccessor = ElementFactory.getterElement(accessorName, false, _typeProvider.dynamicType);
    JUnitTestCase.assertEquals(syntheticAccessor.type, mapD.get(accessorName).type);
    _assertNoErrors(classD);
  }

  void test_getMapOfMembersInheritedFromInterfaces_union_multipleSubtypes_3_methods() {
    // class A {}
    // class B extends A {}
    // class C extends B {}
    // class I1 { dynamic m(A a); }
    // class I2 { dynamic m(B b); }
    // class I3 { dynamic m(C c); }
    // class D implements I1, I2, I3 {}
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    ClassElementImpl classB = ElementFactory.classElement("B", classA.type, []);
    ClassElementImpl classC = ElementFactory.classElement("C", classB.type, []);
    ClassElementImpl classI1 = ElementFactory.classElement2("I1", []);
    String methodName = "m";
    MethodElementImpl methodM1 = ElementFactory.methodElement(methodName, _typeProvider.dynamicType, []);
    ParameterElementImpl parameter1 = new ParameterElementImpl.forNode(AstFactory.identifier3("a0"));
    parameter1.type = classA.type;
    parameter1.parameterKind = ParameterKind.REQUIRED;
    methodM1.parameters = <ParameterElement> [parameter1];
    classI1.methods = <MethodElement> [methodM1];
    ClassElementImpl classI2 = ElementFactory.classElement2("I2", []);
    MethodElementImpl methodM2 = ElementFactory.methodElement(methodName, _typeProvider.dynamicType, []);
    ParameterElementImpl parameter2 = new ParameterElementImpl.forNode(AstFactory.identifier3("a0"));
    parameter2.type = classB.type;
    parameter2.parameterKind = ParameterKind.REQUIRED;
    methodM2.parameters = <ParameterElement> [parameter2];
    classI2.methods = <MethodElement> [methodM2];
    ClassElementImpl classI3 = ElementFactory.classElement2("I3", []);
    MethodElementImpl methodM3 = ElementFactory.methodElement(methodName, _typeProvider.dynamicType, []);
    ParameterElementImpl parameter3 = new ParameterElementImpl.forNode(AstFactory.identifier3("a0"));
    parameter3.type = classC.type;
    parameter3.parameterKind = ParameterKind.REQUIRED;
    methodM3.parameters = <ParameterElement> [parameter3];
    classI3.methods = <MethodElement> [methodM3];
    ClassElementImpl classD = ElementFactory.classElement2("D", []);
    classD.interfaces = <InterfaceType> [classI1.type, classI2.type, classI3.type];
    MemberMap mapD = _inheritanceManager.getMapOfMembersInheritedFromInterfaces(classD);
    JUnitTestCase.assertEquals(_numOfMembersInObject + 1, mapD.size);
    MethodElement syntheticMethod = ElementFactory.methodElement(methodName, _typeProvider.dynamicType, [_typeProvider.dynamicType]);
    JUnitTestCase.assertEquals(syntheticMethod.type, mapD.get(methodName).type);
    _assertNoErrors(classD);
  }

  void test_getMapOfMembersInheritedFromInterfaces_union_multipleSubtypes_3_setters() {
    // class A {}
    // class B extends A {}
    // class C extends B {}
    // class I1 { set s(A); }
    // class I2 { set s(B); }
    // class I3 { set s(C); }
    // class D implements I1, I2, I3 {}
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    ClassElementImpl classB = ElementFactory.classElement("B", classA.type, []);
    ClassElementImpl classC = ElementFactory.classElement("C", classB.type, []);
    ClassElementImpl classI1 = ElementFactory.classElement2("I1", []);
    String accessorName = "s";
    PropertyAccessorElement setter1 = ElementFactory.setterElement(accessorName, false, classA.type);
    classI1.accessors = <PropertyAccessorElement> [setter1];
    ClassElementImpl classI2 = ElementFactory.classElement2("I2", []);
    PropertyAccessorElement setter2 = ElementFactory.setterElement(accessorName, false, classB.type);
    classI2.accessors = <PropertyAccessorElement> [setter2];
    ClassElementImpl classI3 = ElementFactory.classElement2("I3", []);
    PropertyAccessorElement setter3 = ElementFactory.setterElement(accessorName, false, classC.type);
    classI3.accessors = <PropertyAccessorElement> [setter3];
    ClassElementImpl classD = ElementFactory.classElement2("D", []);
    classD.interfaces = <InterfaceType> [classI1.type, classI2.type, classI3.type];
    MemberMap mapD = _inheritanceManager.getMapOfMembersInheritedFromInterfaces(classD);
    JUnitTestCase.assertEquals(_numOfMembersInObject + 1, mapD.size);
    PropertyAccessorElementImpl syntheticAccessor = ElementFactory.setterElement(accessorName, false, _typeProvider.dynamicType);
    syntheticAccessor.returnType = _typeProvider.dynamicType;
    JUnitTestCase.assertEquals(syntheticAccessor.type, mapD.get("${accessorName}=").type);
    _assertNoErrors(classD);
  }

  void test_getMapOfMembersInheritedFromInterfaces_union_oneSubtype_2_methods() {
    // class I1 { int m(); }
    // class I2 { int m([int]); }
    // class A implements I1, I2 {}
    ClassElementImpl classI1 = ElementFactory.classElement2("I1", []);
    String methodName = "m";
    MethodElement methodM1 = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    classI1.methods = <MethodElement> [methodM1];
    ClassElementImpl classI2 = ElementFactory.classElement2("I2", []);
    MethodElementImpl methodM2 = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    ParameterElementImpl parameter1 = new ParameterElementImpl.forNode(AstFactory.identifier3("a1"));
    parameter1.type = _typeProvider.intType;
    parameter1.parameterKind = ParameterKind.POSITIONAL;
    methodM2.parameters = <ParameterElement> [parameter1];
    classI2.methods = <MethodElement> [methodM2];
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    classA.interfaces = <InterfaceType> [classI1.type, classI2.type];
    MemberMap mapA = _inheritanceManager.getMapOfMembersInheritedFromInterfaces(classA);
    JUnitTestCase.assertEquals(_numOfMembersInObject + 1, mapA.size);
    JUnitTestCase.assertSame(methodM2, mapA.get(methodName));
    _assertNoErrors(classA);
  }

  void test_getMapOfMembersInheritedFromInterfaces_union_oneSubtype_3_methods() {
    // class I1 { int m(); }
    // class I2 { int m([int]); }
    // class I3 { int m([int, int]); }
    // class A implements I1, I2, I3 {}
    ClassElementImpl classI1 = ElementFactory.classElement2("I1", []);
    String methodName = "m";
    MethodElementImpl methodM1 = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    classI1.methods = <MethodElement> [methodM1];
    ClassElementImpl classI2 = ElementFactory.classElement2("I2", []);
    MethodElementImpl methodM2 = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    ParameterElementImpl parameter1 = new ParameterElementImpl.forNode(AstFactory.identifier3("a1"));
    parameter1.type = _typeProvider.intType;
    parameter1.parameterKind = ParameterKind.POSITIONAL;
    methodM1.parameters = <ParameterElement> [parameter1];
    classI2.methods = <MethodElement> [methodM2];
    ClassElementImpl classI3 = ElementFactory.classElement2("I3", []);
    MethodElementImpl methodM3 = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    ParameterElementImpl parameter2 = new ParameterElementImpl.forNode(AstFactory.identifier3("a2"));
    parameter2.type = _typeProvider.intType;
    parameter2.parameterKind = ParameterKind.POSITIONAL;
    ParameterElementImpl parameter3 = new ParameterElementImpl.forNode(AstFactory.identifier3("a3"));
    parameter3.type = _typeProvider.intType;
    parameter3.parameterKind = ParameterKind.POSITIONAL;
    methodM3.parameters = <ParameterElement> [parameter2, parameter3];
    classI3.methods = <MethodElement> [methodM3];
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    classA.interfaces = <InterfaceType> [classI1.type, classI2.type, classI3.type];
    MemberMap mapA = _inheritanceManager.getMapOfMembersInheritedFromInterfaces(classA);
    JUnitTestCase.assertEquals(_numOfMembersInObject + 1, mapA.size);
    JUnitTestCase.assertSame(methodM3, mapA.get(methodName));
    _assertNoErrors(classA);
  }

  void test_getMapOfMembersInheritedFromInterfaces_union_oneSubtype_4_methods() {
    // class I1 { int m(); }
    // class I2 { int m(); }
    // class I3 { int m([int]); }
    // class I4 { int m([int, int]); }
    // class A implements I1, I2, I3, I4 {}
    ClassElementImpl classI1 = ElementFactory.classElement2("I1", []);
    String methodName = "m";
    MethodElement methodM1 = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    classI1.methods = <MethodElement> [methodM1];
    ClassElementImpl classI2 = ElementFactory.classElement2("I2", []);
    MethodElement methodM2 = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    classI2.methods = <MethodElement> [methodM2];
    ClassElementImpl classI3 = ElementFactory.classElement2("I3", []);
    MethodElementImpl methodM3 = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    ParameterElementImpl parameter1 = new ParameterElementImpl.forNode(AstFactory.identifier3("a1"));
    parameter1.type = _typeProvider.intType;
    parameter1.parameterKind = ParameterKind.POSITIONAL;
    methodM3.parameters = <ParameterElement> [parameter1];
    classI3.methods = <MethodElement> [methodM3];
    ClassElementImpl classI4 = ElementFactory.classElement2("I4", []);
    MethodElementImpl methodM4 = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    ParameterElementImpl parameter2 = new ParameterElementImpl.forNode(AstFactory.identifier3("a2"));
    parameter2.type = _typeProvider.intType;
    parameter2.parameterKind = ParameterKind.POSITIONAL;
    ParameterElementImpl parameter3 = new ParameterElementImpl.forNode(AstFactory.identifier3("a3"));
    parameter3.type = _typeProvider.intType;
    parameter3.parameterKind = ParameterKind.POSITIONAL;
    methodM4.parameters = <ParameterElement> [parameter2, parameter3];
    classI4.methods = <MethodElement> [methodM4];
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    classA.interfaces = <InterfaceType> [classI1.type, classI2.type, classI3.type, classI4.type];
    MemberMap mapA = _inheritanceManager.getMapOfMembersInheritedFromInterfaces(classA);
    JUnitTestCase.assertEquals(_numOfMembersInObject + 1, mapA.size);
    JUnitTestCase.assertSame(methodM4, mapA.get(methodName));
    _assertNoErrors(classA);
  }

  void test_lookupInheritance_interface_getter() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String getterName = "g";
    PropertyAccessorElement getterG = ElementFactory.getterElement(getterName, false, _typeProvider.intType);
    classA.accessors = <PropertyAccessorElement> [getterG];
    ClassElementImpl classB = ElementFactory.classElement2("B", []);
    classB.interfaces = <InterfaceType> [classA.type];
    JUnitTestCase.assertSame(getterG, _inheritanceManager.lookupInheritance(classB, getterName));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
  }

  void test_lookupInheritance_interface_method() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String methodName = "m";
    MethodElement methodM = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    classA.methods = <MethodElement> [methodM];
    ClassElementImpl classB = ElementFactory.classElement2("B", []);
    classB.interfaces = <InterfaceType> [classA.type];
    JUnitTestCase.assertSame(methodM, _inheritanceManager.lookupInheritance(classB, methodName));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
  }

  void test_lookupInheritance_interface_setter() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String setterName = "s";
    PropertyAccessorElement setterS = ElementFactory.setterElement(setterName, false, _typeProvider.intType);
    classA.accessors = <PropertyAccessorElement> [setterS];
    ClassElementImpl classB = ElementFactory.classElement2("B", []);
    classB.interfaces = <InterfaceType> [classA.type];
    JUnitTestCase.assertSame(setterS, _inheritanceManager.lookupInheritance(classB, "${setterName}="));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
  }

  void test_lookupInheritance_interface_staticMember() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String methodName = "m";
    MethodElement methodM = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    (methodM as MethodElementImpl).static = true;
    classA.methods = <MethodElement> [methodM];
    ClassElementImpl classB = ElementFactory.classElement2("B", []);
    classB.interfaces = <InterfaceType> [classA.type];
    JUnitTestCase.assertNull(_inheritanceManager.lookupInheritance(classB, methodName));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
  }

  void test_lookupInheritance_interfaces_infiniteLoop() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    classA.interfaces = <InterfaceType> [classA.type];
    JUnitTestCase.assertNull(_inheritanceManager.lookupInheritance(classA, "name"));
    _assertNoErrors(classA);
  }

  void test_lookupInheritance_interfaces_infiniteLoop2() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    ClassElementImpl classB = ElementFactory.classElement2("B", []);
    classA.interfaces = <InterfaceType> [classB.type];
    classB.interfaces = <InterfaceType> [classA.type];
    JUnitTestCase.assertNull(_inheritanceManager.lookupInheritance(classA, "name"));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
  }

  void test_lookupInheritance_interfaces_union2() {
    ClassElementImpl classI1 = ElementFactory.classElement2("I1", []);
    String methodName1 = "m1";
    MethodElement methodM1 = ElementFactory.methodElement(methodName1, _typeProvider.intType, []);
    classI1.methods = <MethodElement> [methodM1];
    ClassElementImpl classI2 = ElementFactory.classElement2("I2", []);
    String methodName2 = "m2";
    MethodElement methodM2 = ElementFactory.methodElement(methodName2, _typeProvider.intType, []);
    classI2.methods = <MethodElement> [methodM2];
    classI2.interfaces = <InterfaceType> [classI1.type];
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    classA.interfaces = <InterfaceType> [classI2.type];
    JUnitTestCase.assertSame(methodM1, _inheritanceManager.lookupInheritance(classA, methodName1));
    JUnitTestCase.assertSame(methodM2, _inheritanceManager.lookupInheritance(classA, methodName2));
    _assertNoErrors(classI1);
    _assertNoErrors(classI2);
    _assertNoErrors(classA);
  }

  void test_lookupInheritance_mixin_getter() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String getterName = "g";
    PropertyAccessorElement getterG = ElementFactory.getterElement(getterName, false, _typeProvider.intType);
    classA.accessors = <PropertyAccessorElement> [getterG];
    ClassElementImpl classB = ElementFactory.classElement2("B", []);
    classB.mixins = <InterfaceType> [classA.type];
    JUnitTestCase.assertSame(getterG, _inheritanceManager.lookupInheritance(classB, getterName));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
  }

  void test_lookupInheritance_mixin_method() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String methodName = "m";
    MethodElement methodM = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    classA.methods = <MethodElement> [methodM];
    ClassElementImpl classB = ElementFactory.classElement2("B", []);
    classB.mixins = <InterfaceType> [classA.type];
    JUnitTestCase.assertSame(methodM, _inheritanceManager.lookupInheritance(classB, methodName));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
  }

  void test_lookupInheritance_mixin_setter() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String setterName = "s";
    PropertyAccessorElement setterS = ElementFactory.setterElement(setterName, false, _typeProvider.intType);
    classA.accessors = <PropertyAccessorElement> [setterS];
    ClassElementImpl classB = ElementFactory.classElement2("B", []);
    classB.mixins = <InterfaceType> [classA.type];
    JUnitTestCase.assertSame(setterS, _inheritanceManager.lookupInheritance(classB, "${setterName}="));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
  }

  void test_lookupInheritance_mixin_staticMember() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String methodName = "m";
    MethodElement methodM = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    (methodM as MethodElementImpl).static = true;
    classA.methods = <MethodElement> [methodM];
    ClassElementImpl classB = ElementFactory.classElement2("B", []);
    classB.mixins = <InterfaceType> [classA.type];
    JUnitTestCase.assertNull(_inheritanceManager.lookupInheritance(classB, methodName));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
  }

  void test_lookupInheritance_noMember() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    JUnitTestCase.assertNull(_inheritanceManager.lookupInheritance(classA, "a"));
    _assertNoErrors(classA);
  }

  void test_lookupInheritance_superclass_getter() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String getterName = "g";
    PropertyAccessorElement getterG = ElementFactory.getterElement(getterName, false, _typeProvider.intType);
    classA.accessors = <PropertyAccessorElement> [getterG];
    ClassElementImpl classB = ElementFactory.classElement("B", classA.type, []);
    JUnitTestCase.assertSame(getterG, _inheritanceManager.lookupInheritance(classB, getterName));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
  }

  void test_lookupInheritance_superclass_infiniteLoop() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    classA.supertype = classA.type;
    JUnitTestCase.assertNull(_inheritanceManager.lookupInheritance(classA, "name"));
    _assertNoErrors(classA);
  }

  void test_lookupInheritance_superclass_infiniteLoop2() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    ClassElementImpl classB = ElementFactory.classElement2("B", []);
    classA.supertype = classB.type;
    classB.supertype = classA.type;
    JUnitTestCase.assertNull(_inheritanceManager.lookupInheritance(classA, "name"));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
  }

  void test_lookupInheritance_superclass_method() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String methodName = "m";
    MethodElement methodM = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    classA.methods = <MethodElement> [methodM];
    ClassElementImpl classB = ElementFactory.classElement("B", classA.type, []);
    JUnitTestCase.assertSame(methodM, _inheritanceManager.lookupInheritance(classB, methodName));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
  }

  void test_lookupInheritance_superclass_setter() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String setterName = "s";
    PropertyAccessorElement setterS = ElementFactory.setterElement(setterName, false, _typeProvider.intType);
    classA.accessors = <PropertyAccessorElement> [setterS];
    ClassElementImpl classB = ElementFactory.classElement("B", classA.type, []);
    JUnitTestCase.assertSame(setterS, _inheritanceManager.lookupInheritance(classB, "${setterName}="));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
  }

  void test_lookupInheritance_superclass_staticMember() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String methodName = "m";
    MethodElement methodM = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    (methodM as MethodElementImpl).static = true;
    classA.methods = <MethodElement> [methodM];
    ClassElementImpl classB = ElementFactory.classElement("B", classA.type, []);
    JUnitTestCase.assertNull(_inheritanceManager.lookupInheritance(classB, methodName));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
  }

  void test_lookupMember_getter() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String getterName = "g";
    PropertyAccessorElement getterG = ElementFactory.getterElement(getterName, false, _typeProvider.intType);
    classA.accessors = <PropertyAccessorElement> [getterG];
    JUnitTestCase.assertSame(getterG, _inheritanceManager.lookupMember(classA, getterName));
    _assertNoErrors(classA);
  }

  void test_lookupMember_getter_static() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String getterName = "g";
    PropertyAccessorElement getterG = ElementFactory.getterElement(getterName, true, _typeProvider.intType);
    classA.accessors = <PropertyAccessorElement> [getterG];
    JUnitTestCase.assertNull(_inheritanceManager.lookupMember(classA, getterName));
    _assertNoErrors(classA);
  }

  void test_lookupMember_method() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String methodName = "m";
    MethodElement methodM = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    classA.methods = <MethodElement> [methodM];
    JUnitTestCase.assertSame(methodM, _inheritanceManager.lookupMember(classA, methodName));
    _assertNoErrors(classA);
  }

  void test_lookupMember_method_static() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String methodName = "m";
    MethodElement methodM = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    (methodM as MethodElementImpl).static = true;
    classA.methods = <MethodElement> [methodM];
    JUnitTestCase.assertNull(_inheritanceManager.lookupMember(classA, methodName));
    _assertNoErrors(classA);
  }

  void test_lookupMember_noMember() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    JUnitTestCase.assertNull(_inheritanceManager.lookupMember(classA, "a"));
    _assertNoErrors(classA);
  }

  void test_lookupMember_setter() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String setterName = "s";
    PropertyAccessorElement setterS = ElementFactory.setterElement(setterName, false, _typeProvider.intType);
    classA.accessors = <PropertyAccessorElement> [setterS];
    JUnitTestCase.assertSame(setterS, _inheritanceManager.lookupMember(classA, "${setterName}="));
    _assertNoErrors(classA);
  }

  void test_lookupMember_setter_static() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String setterName = "s";
    PropertyAccessorElement setterS = ElementFactory.setterElement(setterName, true, _typeProvider.intType);
    classA.accessors = <PropertyAccessorElement> [setterS];
    JUnitTestCase.assertNull(_inheritanceManager.lookupMember(classA, setterName));
    _assertNoErrors(classA);
  }

  void test_lookupOverrides_noParentClasses() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String methodName = "m";
    MethodElementImpl methodM = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    classA.methods = <MethodElement> [methodM];
    EngineTestCase.assertSizeOfList(0, _inheritanceManager.lookupOverrides(classA, methodName));
    _assertNoErrors(classA);
  }

  void test_lookupOverrides_overrideBaseClass() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String methodName = "m";
    MethodElementImpl methodMinA = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    classA.methods = <MethodElement> [methodMinA];
    ClassElementImpl classB = ElementFactory.classElement("B", classA.type, []);
    MethodElementImpl methodMinB = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    classB.methods = <MethodElement> [methodMinB];
    List<ExecutableElement> overrides = _inheritanceManager.lookupOverrides(classB, methodName);
    EngineTestCase.assertEqualsIgnoreOrder(<Object> [methodMinA], new List.from(overrides));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
  }

  void test_lookupOverrides_overrideInterface() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String methodName = "m";
    MethodElementImpl methodMinA = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    classA.methods = <MethodElement> [methodMinA];
    ClassElementImpl classB = ElementFactory.classElement2("B", []);
    classB.interfaces = <InterfaceType> [classA.type];
    MethodElementImpl methodMinB = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    classB.methods = <MethodElement> [methodMinB];
    List<ExecutableElement> overrides = _inheritanceManager.lookupOverrides(classB, methodName);
    EngineTestCase.assertEqualsIgnoreOrder(<Object> [methodMinA], new List.from(overrides));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
  }

  void test_lookupOverrides_overrideTwoInterfaces() {
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    String methodName = "m";
    MethodElementImpl methodMinA = ElementFactory.methodElement(methodName, _typeProvider.intType, []);
    classA.methods = <MethodElement> [methodMinA];
    ClassElementImpl classB = ElementFactory.classElement2("B", []);
    MethodElementImpl methodMinB = ElementFactory.methodElement(methodName, _typeProvider.doubleType, []);
    classB.methods = <MethodElement> [methodMinB];
    ClassElementImpl classC = ElementFactory.classElement2("C", []);
    classC.interfaces = <InterfaceType> [classA.type, classB.type];
    MethodElementImpl methodMinC = ElementFactory.methodElement(methodName, _typeProvider.numType, []);
    classC.methods = <MethodElement> [methodMinC];
    List<ExecutableElement> overrides = _inheritanceManager.lookupOverrides(classC, methodName);
    EngineTestCase.assertEqualsIgnoreOrder(<Object> [methodMinA, methodMinB], new List.from(overrides));
    _assertNoErrors(classA);
    _assertNoErrors(classB);
    _assertNoErrors(classC);
  }

  void _assertErrors(ClassElement classElt, List<ErrorCode> expectedErrorCodes) {
    GatheringErrorListener errorListener = new GatheringErrorListener();
    HashSet<AnalysisError> actualErrors = _inheritanceManager.getErrors(classElt);
    if (actualErrors != null) {
      for (AnalysisError error in actualErrors) {
        errorListener.onError(error);
      }
    }
    errorListener.assertErrorsWithCodes(expectedErrorCodes);
  }

  void _assertNoErrors(ClassElement classElt) {
    _assertErrors(classElt, []);
  }

  /**
   * Create the inheritance manager used by the tests.
   *
   * @return the inheritance manager that was created
   */
  InheritanceManager _createInheritanceManager() {
    AnalysisContextImpl context = AnalysisContextFactory.contextWithCore();
    FileBasedSource source = new FileBasedSource.con1(FileUtilities2.createFile("/test.dart"));
    CompilationUnitElementImpl definingCompilationUnit = new CompilationUnitElementImpl("test.dart");
    definingCompilationUnit.source = source;
    _definingLibrary = ElementFactory.library(context, "test");
    _definingLibrary.definingCompilationUnit = definingCompilationUnit;
    return new InheritanceManager(_definingLibrary);
  }
}

class LibraryElementBuilderTest extends EngineTestCase {
  /**
   * The analysis context used to analyze sources.
   */
  AnalysisContextImpl _context;

  @override
  void setUp() {
    SourceFactory sourceFactory = new SourceFactory([
        new DartUriResolver(DirectoryBasedDartSdk.defaultSdk),
        new FileUriResolver()]);
    _context = new AnalysisContextImpl();
    _context.sourceFactory = sourceFactory;
  }

  void test_accessorsAcrossFiles() {
    Source librarySource = addSource("/lib.dart", EngineTestCase.createSource([
        "library lib;",
        "part 'first.dart';",
        "part 'second.dart';"]));
    addSource("/first.dart", EngineTestCase.createSource(["part of lib;", "int get V => 0;"]));
    addSource("/second.dart", EngineTestCase.createSource(["part of lib;", "void set V(int v) {}"]));
    LibraryElement element = _buildLibrary(librarySource, []);
    JUnitTestCase.assertNotNull(element);
    List<CompilationUnitElement> sourcedUnits = element.parts;
    EngineTestCase.assertLength(2, sourcedUnits);
    List<PropertyAccessorElement> firstAccessors = sourcedUnits[0].accessors;
    EngineTestCase.assertLength(1, firstAccessors);
    List<PropertyAccessorElement> secondAccessors = sourcedUnits[1].accessors;
    EngineTestCase.assertLength(1, secondAccessors);
    JUnitTestCase.assertSame(firstAccessors[0].variable, secondAccessors[0].variable);
  }

  void test_empty() {
    Source librarySource = addSource("/lib.dart", "library lib;");
    LibraryElement element = _buildLibrary(librarySource, []);
    JUnitTestCase.assertNotNull(element);
    JUnitTestCase.assertEquals("lib", element.name);
    JUnitTestCase.assertNull(element.entryPoint);
    EngineTestCase.assertLength(0, element.importedLibraries);
    EngineTestCase.assertLength(0, element.imports);
    JUnitTestCase.assertSame(element, element.library);
    EngineTestCase.assertLength(0, element.prefixes);
    EngineTestCase.assertLength(0, element.parts);
    CompilationUnitElement unit = element.definingCompilationUnit;
    JUnitTestCase.assertNotNull(unit);
    JUnitTestCase.assertEquals("lib.dart", unit.name);
    JUnitTestCase.assertEquals(element, unit.library);
    EngineTestCase.assertLength(0, unit.accessors);
    EngineTestCase.assertLength(0, unit.functions);
    EngineTestCase.assertLength(0, unit.functionTypeAliases);
    EngineTestCase.assertLength(0, unit.types);
    EngineTestCase.assertLength(0, unit.topLevelVariables);
  }

  void test_missingLibraryDirectiveWithPart() {
    addSource("/a.dart", EngineTestCase.createSource(["part of lib;"]));
    Source librarySource = addSource("/lib.dart", EngineTestCase.createSource(["part 'a.dart';"]));
    LibraryElement element = _buildLibrary(librarySource, [ResolverErrorCode.MISSING_LIBRARY_DIRECTIVE_WITH_PART]);
    JUnitTestCase.assertNotNull(element);
  }

  void test_missingPartOfDirective() {
    addSource("/a.dart", "class A {}");
    Source librarySource = addSource("/lib.dart", EngineTestCase.createSource(["library lib;", "", "part 'a.dart';"]));
    LibraryElement element = _buildLibrary(librarySource, [CompileTimeErrorCode.PART_OF_NON_PART]);
    JUnitTestCase.assertNotNull(element);
  }

  void test_multipleFiles() {
    Source librarySource = addSource("/lib.dart", EngineTestCase.createSource([
        "library lib;",
        "part 'first.dart';",
        "part 'second.dart';",
        "",
        "class A {}"]));
    addSource("/first.dart", EngineTestCase.createSource(["part of lib;", "class B {}"]));
    addSource("/second.dart", EngineTestCase.createSource(["part of lib;", "class C {}"]));
    LibraryElement element = _buildLibrary(librarySource, []);
    JUnitTestCase.assertNotNull(element);
    List<CompilationUnitElement> sourcedUnits = element.parts;
    EngineTestCase.assertLength(2, sourcedUnits);
    _assertTypes(element.definingCompilationUnit, ["A"]);
    if (sourcedUnits[0].name == "first.dart") {
      _assertTypes(sourcedUnits[0], ["B"]);
      _assertTypes(sourcedUnits[1], ["C"]);
    } else {
      _assertTypes(sourcedUnits[0], ["C"]);
      _assertTypes(sourcedUnits[1], ["B"]);
    }
  }

  void test_singleFile() {
    Source librarySource = addSource("/lib.dart", EngineTestCase.createSource(["library lib;", "", "class A {}"]));
    LibraryElement element = _buildLibrary(librarySource, []);
    JUnitTestCase.assertNotNull(element);
    _assertTypes(element.definingCompilationUnit, ["A"]);
  }

  /**
   * Add a source file to the content provider. The file path should be absolute.
   *
   * @param filePath the path of the file being added
   * @param contents the contents to be returned by the content provider for the specified file
   * @return the source object representing the added file
   */
  Source addSource(String filePath, String contents) {
    Source source = new FileBasedSource.con1(FileUtilities2.createFile(filePath));
    _context.setContents(source, contents);
    return source;
  }

  @override
  void tearDown() {
    _context = null;
    super.tearDown();
  }

  /**
   * Ensure that there are elements representing all of the types in the given array of type names.
   *
   * @param unit the compilation unit containing the types
   * @param typeNames the names of the types that should be found
   */
  void _assertTypes(CompilationUnitElement unit, List<String> typeNames) {
    JUnitTestCase.assertNotNull(unit);
    List<ClassElement> types = unit.types;
    EngineTestCase.assertLength(typeNames.length, types);
    for (ClassElement type in types) {
      JUnitTestCase.assertNotNull(type);
      String actualTypeName = type.displayName;
      bool wasExpected = false;
      for (String expectedTypeName in typeNames) {
        if (expectedTypeName == actualTypeName) {
          wasExpected = true;
        }
      }
      if (!wasExpected) {
        JUnitTestCase.fail("Found unexpected type ${actualTypeName}");
      }
    }
  }

  /**
   * Build the element model for the library whose defining compilation unit has the given source.
   *
   * @param librarySource the source of the defining compilation unit for the library
   * @param expectedErrorCodes the errors that are expected to be found while building the element
   *          model
   * @return the element model that was built for the library
   * @throws Exception if the element model could not be built
   */
  LibraryElement _buildLibrary(Source librarySource, List<ErrorCode> expectedErrorCodes) {
    LibraryResolver resolver = new LibraryResolver(_context);
    LibraryElementBuilder builder = new LibraryElementBuilder(resolver.analysisContext, resolver.errorListener);
    Library library = resolver.createLibrary(librarySource);
    LibraryElement element = builder.buildLibrary(library);
    GatheringErrorListener listener = new GatheringErrorListener();
    listener.addAll2(resolver.errorListener);
    listener.assertErrorsWithCodes(expectedErrorCodes);
    return element;
  }
}

class LibraryImportScopeTest extends ResolverTestCase {
  void test_conflictingImports() {
    AnalysisContext context = new AnalysisContextImpl();
    context.sourceFactory = new SourceFactory([]);
    String typeNameA = "A";
    String typeNameB = "B";
    String typeNameC = "C";
    ClassElement typeA = ElementFactory.classElement2(typeNameA, []);
    ClassElement typeB1 = ElementFactory.classElement2(typeNameB, []);
    ClassElement typeB2 = ElementFactory.classElement2(typeNameB, []);
    ClassElement typeC = ElementFactory.classElement2(typeNameC, []);
    LibraryElement importedLibrary1 = createTestLibrary(context, "imported1", []);
    (importedLibrary1.definingCompilationUnit as CompilationUnitElementImpl).types = <ClassElement> [typeA, typeB1];
    ImportElementImpl import1 = ElementFactory.importFor(importedLibrary1, null, []);
    LibraryElement importedLibrary2 = createTestLibrary(context, "imported2", []);
    (importedLibrary2.definingCompilationUnit as CompilationUnitElementImpl).types = <ClassElement> [typeB2, typeC];
    ImportElementImpl import2 = ElementFactory.importFor(importedLibrary2, null, []);
    LibraryElementImpl importingLibrary = createTestLibrary(context, "importing", []);
    importingLibrary.imports = <ImportElement> [import1, import2];
    {
      GatheringErrorListener errorListener = new GatheringErrorListener();
      Scope scope = new LibraryImportScope(importingLibrary, errorListener);
      JUnitTestCase.assertEquals(typeA, scope.lookup(AstFactory.identifier3(typeNameA), importingLibrary));
      errorListener.assertNoErrors();
      JUnitTestCase.assertEquals(typeC, scope.lookup(AstFactory.identifier3(typeNameC), importingLibrary));
      errorListener.assertNoErrors();
      Element element = scope.lookup(AstFactory.identifier3(typeNameB), importingLibrary);
      errorListener.assertErrorsWithCodes([StaticWarningCode.AMBIGUOUS_IMPORT]);
      EngineTestCase.assertInstanceOf((obj) => obj is MultiplyDefinedElement, MultiplyDefinedElement, element);
      List<Element> conflictingElements = (element as MultiplyDefinedElement).conflictingElements;
      EngineTestCase.assertLength(2, conflictingElements);
      if (identical(conflictingElements[0], typeB1)) {
        JUnitTestCase.assertSame(typeB2, conflictingElements[1]);
      } else if (identical(conflictingElements[0], typeB2)) {
        JUnitTestCase.assertSame(typeB1, conflictingElements[1]);
      } else {
        JUnitTestCase.assertSame(typeB1, conflictingElements[0]);
      }
    }
    {
      GatheringErrorListener errorListener = new GatheringErrorListener();
      Scope scope = new LibraryImportScope(importingLibrary, errorListener);
      Identifier identifier = AstFactory.identifier3(typeNameB);
      AstFactory.methodDeclaration(null, AstFactory.typeName3(identifier, []), null, null, AstFactory.identifier3("foo"), null);
      Element element = scope.lookup(identifier, importingLibrary);
      errorListener.assertErrorsWithCodes([StaticWarningCode.AMBIGUOUS_IMPORT]);
      EngineTestCase.assertInstanceOf((obj) => obj is MultiplyDefinedElement, MultiplyDefinedElement, element);
    }
  }

  void test_creation_empty() {
    LibraryElement definingLibrary = createDefaultTestLibrary();
    GatheringErrorListener errorListener = new GatheringErrorListener();
    new LibraryImportScope(definingLibrary, errorListener);
  }

  void test_creation_nonEmpty() {
    AnalysisContext context = new AnalysisContextImpl();
    context.sourceFactory = new SourceFactory([]);
    String importedTypeName = "A";
    ClassElement importedType = new ClassElementImpl.forNode(AstFactory.identifier3(importedTypeName));
    LibraryElement importedLibrary = createTestLibrary(context, "imported", []);
    (importedLibrary.definingCompilationUnit as CompilationUnitElementImpl).types = <ClassElement> [importedType];
    LibraryElementImpl definingLibrary = createTestLibrary(context, "importing", []);
    ImportElementImpl importElement = new ImportElementImpl(0);
    importElement.importedLibrary = importedLibrary;
    definingLibrary.imports = <ImportElement> [importElement];
    GatheringErrorListener errorListener = new GatheringErrorListener();
    Scope scope = new LibraryImportScope(definingLibrary, errorListener);
    JUnitTestCase.assertEquals(importedType, scope.lookup(AstFactory.identifier3(importedTypeName), definingLibrary));
  }

  void test_getErrorListener() {
    LibraryElement definingLibrary = createDefaultTestLibrary();
    GatheringErrorListener errorListener = new GatheringErrorListener();
    LibraryImportScope scope = new LibraryImportScope(definingLibrary, errorListener);
    JUnitTestCase.assertEquals(errorListener, scope.errorListener);
  }

  void test_nonConflictingImports_fromSdk() {
    AnalysisContext context = AnalysisContextFactory.contextWithCore();
    String typeName = "List";
    ClassElement type = ElementFactory.classElement2(typeName, []);
    LibraryElement importedLibrary = createTestLibrary(context, "lib", []);
    (importedLibrary.definingCompilationUnit as CompilationUnitElementImpl).types = <ClassElement> [type];
    ImportElementImpl importCore = ElementFactory.importFor(context.getLibraryElement(context.sourceFactory.forUri("dart:core")), null, []);
    ImportElementImpl importLib = ElementFactory.importFor(importedLibrary, null, []);
    LibraryElementImpl importingLibrary = createTestLibrary(context, "importing", []);
    importingLibrary.imports = <ImportElement> [importCore, importLib];
    GatheringErrorListener errorListener = new GatheringErrorListener();
    Scope scope = new LibraryImportScope(importingLibrary, errorListener);
    JUnitTestCase.assertEquals(type, scope.lookup(AstFactory.identifier3(typeName), importingLibrary));
    errorListener.assertErrorsWithCodes([StaticWarningCode.CONFLICTING_DART_IMPORT]);
  }

  void test_nonConflictingImports_sameElement() {
    AnalysisContext context = new AnalysisContextImpl();
    context.sourceFactory = new SourceFactory([]);
    String typeNameA = "A";
    String typeNameB = "B";
    ClassElement typeA = ElementFactory.classElement2(typeNameA, []);
    ClassElement typeB = ElementFactory.classElement2(typeNameB, []);
    LibraryElement importedLibrary = createTestLibrary(context, "imported", []);
    (importedLibrary.definingCompilationUnit as CompilationUnitElementImpl).types = <ClassElement> [typeA, typeB];
    ImportElementImpl import1 = ElementFactory.importFor(importedLibrary, null, []);
    ImportElementImpl import2 = ElementFactory.importFor(importedLibrary, null, []);
    LibraryElementImpl importingLibrary = createTestLibrary(context, "importing", []);
    importingLibrary.imports = <ImportElement> [import1, import2];
    GatheringErrorListener errorListener = new GatheringErrorListener();
    Scope scope = new LibraryImportScope(importingLibrary, errorListener);
    JUnitTestCase.assertEquals(typeA, scope.lookup(AstFactory.identifier3(typeNameA), importingLibrary));
    errorListener.assertNoErrors();
    JUnitTestCase.assertEquals(typeB, scope.lookup(AstFactory.identifier3(typeNameB), importingLibrary));
    errorListener.assertNoErrors();
  }

  void test_prefixedAndNonPrefixed() {
    AnalysisContext context = new AnalysisContextImpl();
    context.sourceFactory = new SourceFactory([]);
    String typeName = "C";
    String prefixName = "p";
    ClassElement prefixedType = ElementFactory.classElement2(typeName, []);
    ClassElement nonPrefixedType = ElementFactory.classElement2(typeName, []);
    LibraryElement prefixedLibrary = createTestLibrary(context, "import.prefixed", []);
    (prefixedLibrary.definingCompilationUnit as CompilationUnitElementImpl).types = <ClassElement> [prefixedType];
    ImportElementImpl prefixedImport = ElementFactory.importFor(prefixedLibrary, ElementFactory.prefix(prefixName), []);
    LibraryElement nonPrefixedLibrary = createTestLibrary(context, "import.nonPrefixed", []);
    (nonPrefixedLibrary.definingCompilationUnit as CompilationUnitElementImpl).types = <ClassElement> [nonPrefixedType];
    ImportElementImpl nonPrefixedImport = ElementFactory.importFor(nonPrefixedLibrary, null, []);
    LibraryElementImpl importingLibrary = createTestLibrary(context, "importing", []);
    importingLibrary.imports = <ImportElement> [prefixedImport, nonPrefixedImport];
    GatheringErrorListener errorListener = new GatheringErrorListener();
    Scope scope = new LibraryImportScope(importingLibrary, errorListener);
    Element prefixedElement = scope.lookup(AstFactory.identifier5(prefixName, typeName), importingLibrary);
    errorListener.assertNoErrors();
    JUnitTestCase.assertSame(prefixedType, prefixedElement);
    Element nonPrefixedElement = scope.lookup(AstFactory.identifier3(typeName), importingLibrary);
    errorListener.assertNoErrors();
    JUnitTestCase.assertSame(nonPrefixedType, nonPrefixedElement);
  }
}

class LibraryResolver2Test extends ResolverTestCase {
  LibraryResolver2 _resolver;

  Source _coreLibrarySource;

  @override
  void setUp() {
    super.setUp();
    _resolver = new LibraryResolver2(analysisContext2);
    _coreLibrarySource = analysisContext2.sourceFactory.forUri(DartSdk.DART_CORE);
  }

  void test_imports_relative() {
    Source sourceA = addSource(EngineTestCase.createSource(["library libA;", "import 'libB.dart';", "class A {}"]));
    Source sourceB = addNamedSource("/libB.dart", EngineTestCase.createSource(["library libB;", "import 'test.dart", "class B {}"]));
    List<ResolvableLibrary> cycle = new List<ResolvableLibrary>();
    ResolvableLibrary coreLib = _createResolvableLibrary(_coreLibrarySource);
    coreLib.libraryElement = analysisContext2.computeLibraryElement(_coreLibrarySource) as LibraryElementImpl;
    ResolvableLibrary libA = _createResolvableLibrary(sourceA);
    ResolvableLibrary libB = _createResolvableLibrary(sourceB);
    libA.importedLibraries = <ResolvableLibrary> [coreLib, libB];
    libB.importedLibraries = <ResolvableLibrary> [coreLib, libA];
    cycle.add(libA);
    cycle.add(libB);
    LibraryElement library = _resolver.resolveLibrary(sourceA, cycle);
    List<LibraryElement> importedLibraries = library.importedLibraries;
    assertNamedElements(importedLibraries, ["dart.core", "libB"]);
  }

  ResolvableLibrary _createResolvableLibrary(Source source) {
    CompilationUnit unit = analysisContext2.parseCompilationUnit(source);
    ResolvableLibrary resolvableLibrary = new ResolvableLibrary(source);
    resolvableLibrary.resolvableCompilationUnits = <ResolvableCompilationUnit>[
        new ResolvableCompilationUnit(source, unit)
    ];
    return resolvableLibrary;
  }
}

class LibraryResolverTest extends ResolverTestCase {
  LibraryResolver _resolver;

  @override
  void setUp() {
    super.setUp();
    _resolver = new LibraryResolver(analysisContext2);
  }

  void test_imports_dart_html() {
    Source source = addSource(EngineTestCase.createSource(["library libA;", "import 'dart:html';", "class A {}"]));
    LibraryElement library = _resolver.resolveLibrary(source, true);
    List<LibraryElement> importedLibraries = library.importedLibraries;
    assertNamedElements(importedLibraries, ["dart.core", "dart.dom.html"]);
  }

  void test_imports_none() {
    Source source = addSource(EngineTestCase.createSource(["library libA;", "class A {}"]));
    LibraryElement library = _resolver.resolveLibrary(source, true);
    List<LibraryElement> importedLibraries = library.importedLibraries;
    assertNamedElements(importedLibraries, ["dart.core"]);
  }

  void test_imports_relative() {
    addNamedSource("/libB.dart", "library libB;");
    Source source = addSource(EngineTestCase.createSource(["library libA;", "import 'libB.dart';", "class A {}"]));
    LibraryElement library = _resolver.resolveLibrary(source, true);
    List<LibraryElement> importedLibraries = library.importedLibraries;
    assertNamedElements(importedLibraries, ["dart.core", "libB"]);
  }
}

class LibraryScopeTest extends ResolverTestCase {
  void test_creation_empty() {
    LibraryElement definingLibrary = createDefaultTestLibrary();
    GatheringErrorListener errorListener = new GatheringErrorListener();
    new LibraryScope(definingLibrary, errorListener);
  }

  void test_creation_nonEmpty() {
    AnalysisContext context = new AnalysisContextImpl();
    context.sourceFactory = new SourceFactory([]);
    String importedTypeName = "A";
    ClassElement importedType = new ClassElementImpl.forNode(AstFactory.identifier3(importedTypeName));
    LibraryElement importedLibrary = createTestLibrary(context, "imported", []);
    (importedLibrary.definingCompilationUnit as CompilationUnitElementImpl).types = <ClassElement> [importedType];
    LibraryElementImpl definingLibrary = createTestLibrary(context, "importing", []);
    ImportElementImpl importElement = new ImportElementImpl(0);
    importElement.importedLibrary = importedLibrary;
    definingLibrary.imports = <ImportElement> [importElement];
    GatheringErrorListener errorListener = new GatheringErrorListener();
    Scope scope = new LibraryScope(definingLibrary, errorListener);
    JUnitTestCase.assertEquals(importedType, scope.lookup(AstFactory.identifier3(importedTypeName), definingLibrary));
  }

  void test_getErrorListener() {
    LibraryElement definingLibrary = createDefaultTestLibrary();
    GatheringErrorListener errorListener = new GatheringErrorListener();
    LibraryScope scope = new LibraryScope(definingLibrary, errorListener);
    JUnitTestCase.assertEquals(errorListener, scope.errorListener);
  }
}

class LibraryTest extends EngineTestCase {
  /**
   * The error listener to which all errors will be reported.
   */
  GatheringErrorListener _errorListener;

  /**
   * The source factory used to create libraries.
   */
  SourceFactory _sourceFactory;

  /**
   * The analysis context to pass in to all libraries created by the tests.
   */
  AnalysisContextImpl _analysisContext;

  /**
   * The library used by the tests.
   */
  Library _library;

  @override
  void setUp() {
    _sourceFactory = new SourceFactory([new FileUriResolver()]);
    _analysisContext = new AnalysisContextImpl();
    _analysisContext.sourceFactory = _sourceFactory;
    _errorListener = new GatheringErrorListener();
    _library = _createLibrary("/lib.dart");
  }

  void test_getExplicitlyImportsCore() {
    JUnitTestCase.assertFalse(_library.explicitlyImportsCore);
    _errorListener.assertNoErrors();
  }

  void test_getExports() {
    EngineTestCase.assertLength(0, _library.exports);
    _errorListener.assertNoErrors();
  }

  void test_getImports() {
    EngineTestCase.assertLength(0, _library.imports);
    _errorListener.assertNoErrors();
  }

  void test_getImportsAndExports() {
    _library.importedLibraries = <Library> [_createLibrary("/imported.dart")];
    _library.exportedLibraries = <Library> [_createLibrary("/exported.dart")];
    EngineTestCase.assertLength(2, _library.importsAndExports);
    _errorListener.assertNoErrors();
  }

  void test_getLibraryScope() {
    LibraryElementImpl element = new LibraryElementImpl.forNode(_analysisContext, AstFactory.libraryIdentifier2(["lib"]));
    element.definingCompilationUnit = new CompilationUnitElementImpl("lib.dart");
    _library.libraryElement = element;
    JUnitTestCase.assertNotNull(_library.libraryScope);
    _errorListener.assertNoErrors();
  }

  void test_getLibrarySource() {
    JUnitTestCase.assertNotNull(_library.librarySource);
  }

  void test_setExplicitlyImportsCore() {
    _library.explicitlyImportsCore = true;
    JUnitTestCase.assertTrue(_library.explicitlyImportsCore);
    _errorListener.assertNoErrors();
  }

  void test_setExportedLibraries() {
    Library exportLibrary = _createLibrary("/exported.dart");
    _library.exportedLibraries = <Library> [exportLibrary];
    List<Library> exports = _library.exports;
    EngineTestCase.assertLength(1, exports);
    JUnitTestCase.assertSame(exportLibrary, exports[0]);
    _errorListener.assertNoErrors();
  }

  void test_setImportedLibraries() {
    Library importLibrary = _createLibrary("/imported.dart");
    _library.importedLibraries = <Library> [importLibrary];
    List<Library> imports = _library.imports;
    EngineTestCase.assertLength(1, imports);
    JUnitTestCase.assertSame(importLibrary, imports[0]);
    _errorListener.assertNoErrors();
  }

  void test_setLibraryElement() {
    LibraryElementImpl element = new LibraryElementImpl.forNode(_analysisContext, AstFactory.libraryIdentifier2(["lib"]));
    _library.libraryElement = element;
    JUnitTestCase.assertSame(element, _library.libraryElement);
  }

  @override
  void tearDown() {
    _errorListener = null;
    _sourceFactory = null;
    _analysisContext = null;
    _library = null;
    super.tearDown();
  }

  Library _createLibrary(String definingCompilationUnitPath) => new Library(_analysisContext, _errorListener, new FileBasedSource.con1(FileUtilities2.createFile(definingCompilationUnitPath)));
}

class MemberMapTest extends JUnitTestCase {
  /**
   * The null type.
   */
  InterfaceType _nullType;

  @override
  void setUp() {
    _nullType = new TestTypeProvider().nullType;
  }

  void test_MemberMap_copyConstructor() {
    MethodElement m1 = ElementFactory.methodElement("m1", _nullType, []);
    MethodElement m2 = ElementFactory.methodElement("m2", _nullType, []);
    MethodElement m3 = ElementFactory.methodElement("m3", _nullType, []);
    MemberMap map = new MemberMap();
    map.put(m1.name, m1);
    map.put(m2.name, m2);
    map.put(m3.name, m3);
    MemberMap copy = new MemberMap.con2(map);
    JUnitTestCase.assertEquals(map.size, copy.size);
    JUnitTestCase.assertEquals(m1, copy.get(m1.name));
    JUnitTestCase.assertEquals(m2, copy.get(m2.name));
    JUnitTestCase.assertEquals(m3, copy.get(m3.name));
  }

  void test_MemberMap_override() {
    MethodElement m1 = ElementFactory.methodElement("m", _nullType, []);
    MethodElement m2 = ElementFactory.methodElement("m", _nullType, []);
    MemberMap map = new MemberMap();
    map.put(m1.name, m1);
    map.put(m2.name, m2);
    JUnitTestCase.assertEquals(1, map.size);
    JUnitTestCase.assertEquals(m2, map.get("m"));
  }

  void test_MemberMap_put() {
    MethodElement m1 = ElementFactory.methodElement("m1", _nullType, []);
    MemberMap map = new MemberMap();
    JUnitTestCase.assertEquals(0, map.size);
    map.put(m1.name, m1);
    JUnitTestCase.assertEquals(1, map.size);
    JUnitTestCase.assertEquals(m1, map.get("m1"));
  }
}

class NonHintCodeTest extends ResolverTestCase {
  void test_deadCode_deadBlock_conditionalElse_debugConst() {
    Source source = addSource(EngineTestCase.createSource([
        "const bool DEBUG = true;",
        "f() {",
        "  DEBUG ? 1 : 2;",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_deadCode_deadBlock_conditionalIf_debugConst() {
    Source source = addSource(EngineTestCase.createSource([
        "const bool DEBUG = false;",
        "f() {",
        "  DEBUG ? 1 : 2;",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_deadCode_deadBlock_else() {
    Source source = addSource(EngineTestCase.createSource([
        "const bool DEBUG = true;",
        "f() {",
        "  if(DEBUG) {} else {}",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_deadCode_deadBlock_if_debugConst_prefixedIdentifier() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  static const bool DEBUG = false;",
        "}",
        "f() {",
        "  if(A.DEBUG) {}",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_deadCode_deadBlock_if_debugConst_prefixedIdentifier2() {
    Source source = addSource(EngineTestCase.createSource([
        "library L;",
        "import 'lib2.dart';",
        "f() {",
        "  if(A.DEBUG) {}",
        "}"]));
    addNamedSource("/lib2.dart", EngineTestCase.createSource([
        "library lib2;",
        "class A {",
        "  static const bool DEBUG = false;",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_deadCode_deadBlock_if_debugConst_propertyAccessor() {
    Source source = addSource(EngineTestCase.createSource([
        "library L;",
        "import 'lib2.dart' as LIB;",
        "f() {",
        "  if(LIB.A.DEBUG) {}",
        "}"]));
    addNamedSource("/lib2.dart", EngineTestCase.createSource([
        "library lib2;",
        "class A {",
        "  static const bool DEBUG = false;",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_deadCode_deadBlock_if_debugConst_simpleIdentifier() {
    Source source = addSource(EngineTestCase.createSource([
        "const bool DEBUG = false;",
        "f() {",
        "  if(DEBUG) {}",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_deadCode_deadBlock_while_debugConst() {
    Source source = addSource(EngineTestCase.createSource([
        "const bool DEBUG = false;",
        "f() {",
        "  while(DEBUG) {}",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_deadCode_deadCatch_onCatchSubtype() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "class B extends A {}",
        "f() {",
        "  try {} on B catch (e) {} on A catch (e) {} catch (e) {}",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_deadCode_deadOperandLHS_and_debugConst() {
    Source source = addSource(EngineTestCase.createSource([
        "const bool DEBUG = false;",
        "f() {",
        "  bool b = DEBUG && false;",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_deadCode_deadOperandLHS_or_debugConst() {
    Source source = addSource(EngineTestCase.createSource([
        "const bool DEBUG = true;",
        "f() {",
        "  bool b = DEBUG || true;",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_divisionOptimization() {
    Source source = addSource(EngineTestCase.createSource(["f(int x, int y) {", "  var v = x / y.toInt();", "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_divisionOptimization_supressIfDivisionNotDefinedInCore() {
    Source source = addSource(EngineTestCase.createSource(["f(x, y) {", "  var v = (x / y).toInt();", "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_divisionOptimization_supressIfDivisionOverridden() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  num operator /(x) { return x; }",
        "}",
        "f(A x, A y) {",
        "  var v = (x / y).toInt();",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_duplicateImport_as() {
    Source source = addSource(EngineTestCase.createSource([
        "library L;",
        "import 'lib1.dart';",
        "import 'lib1.dart' as one;",
        "A a;",
        "one.A a2;"]));
    addNamedSource("/lib1.dart", EngineTestCase.createSource(["library lib1;", "class A {}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_duplicateImport_hide() {
    Source source = addSource(EngineTestCase.createSource([
        "library L;",
        "import 'lib1.dart';",
        "import 'lib1.dart' hide A;",
        "A a;",
        "B b;"]));
    addNamedSource("/lib1.dart", EngineTestCase.createSource(["library lib1;", "class A {}", "class B {}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_duplicateImport_show() {
    Source source = addSource(EngineTestCase.createSource([
        "library L;",
        "import 'lib1.dart';",
        "import 'lib1.dart' show A;",
        "A a;",
        "B b;"]));
    addNamedSource("/lib1.dart", EngineTestCase.createSource(["library lib1;", "class A {}", "class B {}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_importDeferredLibraryWithLoadFunction() {
    resolveWithAndWithoutExperimental(<String> [
        EngineTestCase.createSource(["library lib1;", "f() {}"]),
        EngineTestCase.createSource([
        "library root;",
        "import 'lib1.dart' deferred as lib1;",
        "main() { lib1.f(); }"])], <ErrorCode> [ParserErrorCode.DEFERRED_IMPORTS_NOT_SUPPORTED], <ErrorCode> []);
  }

  void test_issue20904BuggyTypePromotionAtIfJoin_1() {
    // https://code.google.com/p/dart/issues/detail?id=20904
    Source source = addSource(EngineTestCase.createSource([
        "f(var message, var dynamic_) {",
        "  if (message is Function) {",
        "    message = dynamic_;",
        "  }",
        "  int s = message;",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_issue20904BuggyTypePromotionAtIfJoin_2() {
    // https://code.google.com/p/dart/issues/detail?id=20904
    enableUnionTypes(false);
    Source source = addSource(EngineTestCase.createSource([
        "f(var message) {",
        "  if (message is Function) {",
        "    message = '';",
        "  }",
        "  int s = message;",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_issue20904BuggyTypePromotionAtIfJoin_3() {
    // https://code.google.com/p/dart/issues/detail?id=20904
    Source source = addSource(EngineTestCase.createSource([
        "f(var message) {",
        "  var dynamic_;",
        "  if (message is Function) {",
        "    message = dynamic_;",
        "  } else {",
        "    return;",
        "  }",
        "  int s = message;",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_issue20904BuggyTypePromotionAtIfJoin_4() {
    // https://code.google.com/p/dart/issues/detail?id=20904
    Source source = addSource(EngineTestCase.createSource([
        "f(var message) {",
        "  if (message is Function) {",
        "    message = '';",
        "  } else {",
        "    return;",
        "  }",
        "  String s = message;",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_missingReturn_emptyFunctionBody() {
    Source source = addSource(EngineTestCase.createSource(["abstract class A {", "  int m();", "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_missingReturn_expressionFunctionBody() {
    Source source = addSource(EngineTestCase.createSource(["int f() => 0;"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_missingReturn_noReturnType() {
    Source source = addSource(EngineTestCase.createSource(["f() {}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_missingReturn_voidReturnType() {
    Source source = addSource(EngineTestCase.createSource(["void f() {}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_overrideEqualsButNotHashCode() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  bool operator ==(x) { return x; }",
        "  get hashCode => 0;",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_overrideOnNonOverridingGetter_inInterface() {
    Source source = addSource(EngineTestCase.createSource([
        "library dart.core;",
        "const override = null;",
        "class A {",
        "  int get m => 0;",
        "}",
        "class B implements A {",
        "  @override",
        "  int get m => 1;",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_overrideOnNonOverridingGetter_inSuperclass() {
    Source source = addSource(EngineTestCase.createSource([
        "library dart.core;",
        "const override = null;",
        "class A {",
        "  int get m => 0;",
        "}",
        "class B extends A {",
        "  @override",
        "  int get m => 1;",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_overrideOnNonOverridingMethod_inInterface() {
    Source source = addSource(EngineTestCase.createSource([
        "library dart.core;",
        "const override = null;",
        "class A {",
        "  int m() => 0;",
        "}",
        "class B implements A {",
        "  @override",
        "  int m() => 1;",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_overrideOnNonOverridingMethod_inSuperclass() {
    Source source = addSource(EngineTestCase.createSource([
        "library dart.core;",
        "const override = null;",
        "class A {",
        "  int m() => 0;",
        "}",
        "class B extends A {",
        "  @override",
        "  int m() => 1;",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_overrideOnNonOverridingSetter_inInterface() {
    Source source = addSource(EngineTestCase.createSource([
        "library dart.core;",
        "const override = null;",
        "class A {",
        "  set m(int x) {}",
        "}",
        "class B implements A {",
        "  @override",
        "  set m(int x) {}",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_overrideOnNonOverridingSetter_inSuperclass() {
    Source source = addSource(EngineTestCase.createSource([
        "library dart.core;",
        "const override = null;",
        "class A {",
        "  set m(int x) {}",
        "}",
        "class B extends A {",
        "  @override",
        "  set m(int x) {}",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_propagatedFieldType() {
    // From dartbug.com/20019
    Source source = addSource(EngineTestCase.createSource([
        "class A { }",
        "class X<T> {",
        "  final x = new List<T>();",
        "}",
        "class Z {",
        "  final X<A> y = new X<A>();",
        "  foo() {",
        "    y.x.add(new A());",
        "  }",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_proxy_annotation_prefixed() {
    Source source = addSource(EngineTestCase.createSource([
        "library L;",
        "@proxy",
        "class A {}",
        "f(var a) {",
        "  a = new A();",
        "  a.m();",
        "  var x = a.g;",
        "  a.s = 1;",
        "  var y = a + a;",
        "  a++;",
        "  ++a;",
        "}"]));
    resolve(source);
    assertNoErrors(source);
  }

  void test_proxy_annotation_prefixed2() {
    Source source = addSource(EngineTestCase.createSource([
        "library L;",
        "@proxy",
        "class A {}",
        "class B {",
        "  f(var a) {",
        "    a = new A();",
        "    a.m();",
        "    var x = a.g;",
        "    a.s = 1;",
        "    var y = a + a;",
        "    a++;",
        "    ++a;",
        "  }",
        "}"]));
    resolve(source);
    assertNoErrors(source);
  }

  void test_proxy_annotation_prefixed3() {
    Source source = addSource(EngineTestCase.createSource([
        "library L;",
        "class B {",
        "  f(var a) {",
        "    a = new A();",
        "    a.m();",
        "    var x = a.g;",
        "    a.s = 1;",
        "    var y = a + a;",
        "    a++;",
        "    ++a;",
        "  }",
        "}",
        "@proxy",
        "class A {}"]));
    resolve(source);
    assertNoErrors(source);
  }

  void test_undefinedGetter_inSubtype() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "class B extends A {",
        "  get b => 0;",
        "}",
        "f(var a) {",
        "  if(a is A) {",
        "    return a.b;",
        "  }",
        "}"]));
    resolve(source);
    assertNoErrors(source);
  }

  void test_undefinedMethod_assignmentExpression_inSubtype() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "class B extends A {",
        "  operator +(B b) {return new B();}",
        "}",
        "f(var a, var a2) {",
        "  a = new A();",
        "  a2 = new A();",
        "  a += a2;",
        "}"]));
    resolve(source);
    assertNoErrors(source);
  }

  void test_undefinedMethod_inSubtype() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "class B extends A {",
        "  b() {}",
        "}",
        "f() {",
        "  var a = new A();",
        "  a.b();",
        "}"]));
    resolve(source);
    assertNoErrors(source);
  }

  void test_undefinedMethod_unionType_all() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  int m(int x) => 0;",
        "}",
        "class B {",
        "  String m() => '0';",
        "}",
        "f(A a, B b) {",
        "  var ab;",
        "  if (0 < 1) {",
        "    ab = a;",
        "  } else {",
        "    ab = b;",
        "  }",
        "  ab.m();",
        "}"]));
    resolve(source);
    assertNoErrors(source);
  }

  void test_undefinedMethod_unionType_some() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  int m(int x) => 0;",
        "}",
        "class B {}",
        "f(A a, B b) {",
        "  var ab;",
        "  if (0 < 1) {",
        "    ab = a;",
        "  } else {",
        "    ab = b;",
        "  }",
        "  ab.m(0);",
        "}"]));
    resolve(source);
    assertNoErrors(source);
  }

  void test_undefinedOperator_binaryExpression_inSubtype() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "class B extends A {",
        "  operator +(B b) {}",
        "}",
        "f(var a) {",
        "  if(a is A) {",
        "    a + 1;",
        "  }",
        "}"]));
    resolve(source);
    assertNoErrors(source);
  }

  void test_undefinedOperator_indexBoth_inSubtype() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "class B extends A {",
        "  operator [](int index) {}",
        "}",
        "f(var a) {",
        "  if(a is A) {",
        "    a[0]++;",
        "  }",
        "}"]));
    resolve(source);
    assertNoErrors(source);
  }

  void test_undefinedOperator_indexGetter_inSubtype() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "class B extends A {",
        "  operator [](int index) {}",
        "}",
        "f(var a) {",
        "  if(a is A) {",
        "    a[0];",
        "  }",
        "}"]));
    resolve(source);
    assertNoErrors(source);
  }

  void test_undefinedOperator_indexSetter_inSubtype() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "class B extends A {",
        "  operator []=(i, v) {}",
        "}",
        "f(var a) {",
        "  if(a is A) {",
        "    a[0] = 1;",
        "  }",
        "}"]));
    resolve(source);
    assertNoErrors(source);
  }

  void test_undefinedOperator_postfixExpression() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "class B extends A {",
        "  operator +(B b) {return new B();}",
        "}",
        "f(var a) {",
        "  if(a is A) {",
        "    a++;",
        "  }",
        "}"]));
    resolve(source);
    assertNoErrors(source);
  }

  void test_undefinedOperator_prefixExpression() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "class B extends A {",
        "  operator +(B b) {return new B();}",
        "}",
        "f(var a) {",
        "  if(a is A) {",
        "    ++a;",
        "  }",
        "}"]));
    resolve(source);
    assertNoErrors(source);
  }

  void test_undefinedSetter_inSubtype() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "class B extends A {",
        "  set b(x) {}",
        "}",
        "f(var a) {",
        "  if(a is A) {",
        "    a.b = 0;",
        "  }",
        "}"]));
    resolve(source);
    assertNoErrors(source);
  }

  void test_unnecessaryCast_13855_parameter_A() {
    // dartbug.com/13855, dartbug.com/13732
    Source source = addSource(EngineTestCase.createSource([
        "class A{",
        "  a() {}",
        "}",
        "class B<E> {",
        "  E e;",
        "  m() {",
        "    (e as A).a();",
        "  }",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_unnecessaryCast_dynamic_type() {
    Source source = addSource(EngineTestCase.createSource(["m(v) {", "  var b = v as Object;", "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_unnecessaryCast_generics() {
    // dartbug.com/18953
    Source source = addSource(EngineTestCase.createSource([
        "import 'dart:async';",
        "Future<int> f() => new Future.value(0);",
        "void g(bool c) {",
        "  (c ? f(): new Future.value(0) as Future<int>).then((int value) {});",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_unnecessaryCast_type_dynamic() {
    Source source = addSource(EngineTestCase.createSource(["m(v) {", "  var b = Object as dynamic;", "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_unusedImport_annotationOnDirective() {
    Source source = addSource(EngineTestCase.createSource(["library L;", "@A()", "import 'lib1.dart';"]));
    Source source2 = addNamedSource("/lib1.dart", EngineTestCase.createSource(["library lib1;", "class A {", "  const A() {}", "}"]));
    resolve(source);
    assertErrors(source, []);
    verify([source, source2]);
  }

  void test_unusedImport_as_equalPrefixes() {
    // 18818
    Source source = addSource(EngineTestCase.createSource([
        "library L;",
        "import 'lib1.dart' as one;",
        "import 'lib2.dart' as one;",
        "one.A a;",
        "one.B b;"]));
    Source source2 = addNamedSource("/lib1.dart", EngineTestCase.createSource(["library lib1;", "class A {}"]));
    Source source3 = addNamedSource("/lib2.dart", EngineTestCase.createSource(["library lib2;", "class B {}"]));
    resolve(source);
    assertErrors(source, []);
    assertNoErrors(source2);
    assertNoErrors(source3);
    verify([source, source2, source3]);
  }

  void test_unusedImport_core_library() {
    Source source = addSource(EngineTestCase.createSource(["library L;", "import 'dart:core';"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_unusedImport_export() {
    Source source = addSource(EngineTestCase.createSource(["library L;", "import 'lib1.dart';", "Two two;"]));
    addNamedSource("/lib1.dart", EngineTestCase.createSource(["library lib1;", "export 'lib2.dart';", "class One {}"]));
    addNamedSource("/lib2.dart", EngineTestCase.createSource(["library lib2;", "class Two {}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_unusedImport_export_infiniteLoop() {
    Source source = addSource(EngineTestCase.createSource(["library L;", "import 'lib1.dart';", "Two two;"]));
    addNamedSource("/lib1.dart", EngineTestCase.createSource(["library lib1;", "export 'lib2.dart';", "class One {}"]));
    addNamedSource("/lib2.dart", EngineTestCase.createSource(["library lib2;", "export 'lib3.dart';", "class Two {}"]));
    addNamedSource("/lib3.dart", EngineTestCase.createSource(["library lib3;", "export 'lib2.dart';", "class Three {}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_unusedImport_export2() {
    Source source = addSource(EngineTestCase.createSource(["library L;", "import 'lib1.dart';", "Three three;"]));
    addNamedSource("/lib1.dart", EngineTestCase.createSource(["library lib1;", "export 'lib2.dart';", "class One {}"]));
    addNamedSource("/lib2.dart", EngineTestCase.createSource(["library lib2;", "export 'lib3.dart';", "class Two {}"]));
    addNamedSource("/lib3.dart", EngineTestCase.createSource(["library lib3;", "class Three {}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_unusedImport_metadata() {
    Source source = addSource(EngineTestCase.createSource([
        "library L;",
        "@A(x)",
        "import 'lib1.dart';",
        "class A {",
        "  final int value;",
        "  const A(this.value);",
        "}"]));
    addNamedSource("/lib1.dart", EngineTestCase.createSource(["library lib1;", "const x = 0;"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_unusedImport_prefix_topLevelFunction() {
    Source source = addSource(EngineTestCase.createSource([
        "library L;",
        "import 'lib1.dart' hide topLevelFunction;",
        "import 'lib1.dart' as one show topLevelFunction;",
        "class A {",
        "  static void x() {",
        "    One o;",
        "    one.topLevelFunction();",
        "  }",
        "}"]));
    addNamedSource("/lib1.dart", EngineTestCase.createSource(["library lib1;", "class One {}", "topLevelFunction() {}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_useOfVoidResult_implicitReturnValue() {
    Source source = addSource(EngineTestCase.createSource([
        "f() {}",
        "class A {",
        "  n() {",
        "    var a = f();",
        "  }",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_useOfVoidResult_nonVoidReturnValue() {
    Source source = addSource(EngineTestCase.createSource(["int f() => 1;", "g() {", "  var a = f();", "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }
}

class PubSuggestionCodeTest extends ResolverTestCase {
  void test_import_package() {
    Source source = addSource(EngineTestCase.createSource(["import 'package:somepackage/other.dart';"]));
    resolve(source);
    assertErrors(source, [CompileTimeErrorCode.URI_DOES_NOT_EXIST]);
  }

  void test_import_packageWithDotDot() {
    Source source = addSource(EngineTestCase.createSource(["import 'package:somepackage/../other.dart';"]));
    resolve(source);
    assertErrors(source, [
        CompileTimeErrorCode.URI_DOES_NOT_EXIST,
        HintCode.PACKAGE_IMPORT_CONTAINS_DOT_DOT]);
  }

  void test_import_packageWithLeadingDotDot() {
    Source source = addSource(EngineTestCase.createSource(["import 'package:../other.dart';"]));
    resolve(source);
    assertErrors(source, [
        CompileTimeErrorCode.URI_DOES_NOT_EXIST,
        HintCode.PACKAGE_IMPORT_CONTAINS_DOT_DOT]);
  }

  void test_import_referenceIntoLibDirectory() {
    cacheSource("/myproj/pubspec.yaml", "");
    cacheSource("/myproj/lib/other.dart", "");
    Source source = addNamedSource("/myproj/web/test.dart", EngineTestCase.createSource(["import '../lib/other.dart';"]));
    resolve(source);
    assertErrors(source, [HintCode.FILE_IMPORT_OUTSIDE_LIB_REFERENCES_FILE_INSIDE]);
  }

  void test_import_referenceIntoLibDirectory_no_pubspec() {
    cacheSource("/myproj/lib/other.dart", "");
    Source source = addNamedSource("/myproj/web/test.dart", EngineTestCase.createSource(["import '../lib/other.dart';"]));
    resolve(source);
    assertNoErrors(source);
  }

  void test_import_referenceOutOfLibDirectory() {
    cacheSource("/myproj/pubspec.yaml", "");
    cacheSource("/myproj/web/other.dart", "");
    Source source = addNamedSource("/myproj/lib/test.dart", EngineTestCase.createSource(["import '../web/other.dart';"]));
    resolve(source);
    assertErrors(source, [HintCode.FILE_IMPORT_INSIDE_LIB_REFERENCES_FILE_OUTSIDE]);
  }

  void test_import_referenceOutOfLibDirectory_no_pubspec() {
    cacheSource("/myproj/web/other.dart", "");
    Source source = addNamedSource("/myproj/lib/test.dart", EngineTestCase.createSource(["import '../web/other.dart';"]));
    resolve(source);
    assertNoErrors(source);
  }

  void test_import_valid_inside_lib1() {
    cacheSource("/myproj/pubspec.yaml", "");
    cacheSource("/myproj/lib/other.dart", "");
    Source source = addNamedSource("/myproj/lib/test.dart", EngineTestCase.createSource(["import 'other.dart';"]));
    resolve(source);
    assertNoErrors(source);
  }

  void test_import_valid_inside_lib2() {
    cacheSource("/myproj/pubspec.yaml", "");
    cacheSource("/myproj/lib/bar/other.dart", "");
    Source source = addNamedSource("/myproj/lib/foo/test.dart", EngineTestCase.createSource(["import '../bar/other.dart';"]));
    resolve(source);
    assertNoErrors(source);
  }

  void test_import_valid_outside_lib() {
    cacheSource("/myproj/pubspec.yaml", "");
    cacheSource("/myproj/web/other.dart", "");
    Source source = addNamedSource("/myproj/lib2/test.dart", EngineTestCase.createSource(["import '../web/other.dart';"]));
    resolve(source);
    assertNoErrors(source);
  }
}

class RecursiveAstVisitor_SimpleResolverTest_test_localVariable_types_invoked extends RecursiveAstVisitor<Object> {
  final SimpleResolverTest SimpleResolverTest_this;

  List<bool> found;

  List<CaughtException> thrownException;

  RecursiveAstVisitor_SimpleResolverTest_test_localVariable_types_invoked(this.SimpleResolverTest_this, this.found, this.thrownException) : super();

  @override
  Object visitSimpleIdentifier(SimpleIdentifier node) {
    if (node.name == "myVar" && node.parent is MethodInvocation) {
      try {
        found[0] = true;
        // check static type
        DartType staticType = node.staticType;
        JUnitTestCase.assertSame(SimpleResolverTest_this.typeProvider.dynamicType, staticType);
        // check propagated type
        FunctionType propagatedType = node.propagatedType as FunctionType;
        JUnitTestCase.assertEquals(SimpleResolverTest_this.typeProvider.stringType, propagatedType.returnType);
      } on AnalysisException catch (e, stackTrace) {
        thrownException[0] = new CaughtException(e, stackTrace);
      }
    }
    return null;
  }
}

/**
 * Instances of the class `ResolutionVerifier` verify that all of the nodes in an AST
 * structure that should have been resolved were resolved.
 */
class ResolutionVerifier extends RecursiveAstVisitor<Object> {
  /**
   * A set containing nodes that are known to not be resolvable and should therefore not cause the
   * test to fail.
   */
  final Set<AstNode> _knownExceptions;

  /**
   * A list containing all of the AST nodes that were not resolved.
   */
  List<AstNode> _unresolvedNodes = new List<AstNode>();

  /**
   * A list containing all of the AST nodes that were resolved to an element of the wrong type.
   */
  List<AstNode> _wrongTypedNodes = new List<AstNode>();

  /**
   * Initialize a newly created verifier to verify that all of the nodes in the visited AST
   * structures that are expected to have been resolved have an element associated with them.
   */
  ResolutionVerifier() : this.con1(null);

  /**
   * Initialize a newly created verifier to verify that all of the identifiers in the visited AST
   * structures that are expected to have been resolved have an element associated with them. Nodes
   * in the set of known exceptions are not expected to have been resolved, even if they normally
   * would have been expected to have been resolved.
   *
   * @param knownExceptions a set containing nodes that are known to not be resolvable and should
   *          therefore not cause the test to fail
   **/
  ResolutionVerifier.con1(this._knownExceptions);

  /**
   * Assert that all of the visited identifiers were resolved.
   */
  void assertResolved() {
    if (!_unresolvedNodes.isEmpty || !_wrongTypedNodes.isEmpty) {
      PrintStringWriter writer = new PrintStringWriter();
      if (!_unresolvedNodes.isEmpty) {
        writer.print("Failed to resolve ");
        writer.print(_unresolvedNodes.length);
        writer.println(" nodes:");
        _printNodes(writer, _unresolvedNodes);
      }
      if (!_wrongTypedNodes.isEmpty) {
        writer.print("Resolved ");
        writer.print(_wrongTypedNodes.length);
        writer.println(" to the wrong type of element:");
        _printNodes(writer, _wrongTypedNodes);
      }
      JUnitTestCase.fail(writer.toString());
    }
  }

  @override
  Object visitAnnotation(Annotation node) {
    node.visitChildren(this);
    ElementAnnotation elementAnnotation = node.elementAnnotation;
    if (elementAnnotation == null) {
      if (_knownExceptions == null || !_knownExceptions.contains(node)) {
        _unresolvedNodes.add(node);
      }
    } else if (elementAnnotation is! ElementAnnotation) {
      _wrongTypedNodes.add(node);
    }
    return null;
  }

  @override
  Object visitBinaryExpression(BinaryExpression node) {
    node.visitChildren(this);
    if (!node.operator.isUserDefinableOperator) {
      return null;
    }
    DartType operandType = node.leftOperand.staticType;
    if (operandType == null || operandType.isDynamic) {
      return null;
    }
    return _checkResolved(node, node.staticElement, (node) => node is MethodElement);
  }

  @override
  Object visitCommentReference(CommentReference node) => null;

  @override
  Object visitCompilationUnit(CompilationUnit node) {
    node.visitChildren(this);
    return _checkResolved(node, node.element, (node) => node is CompilationUnitElement);
  }

  @override
  Object visitExportDirective(ExportDirective node) => _checkResolved(node, node.element, (node) => node is ExportElement);

  @override
  Object visitFunctionDeclaration(FunctionDeclaration node) {
    node.visitChildren(this);
    if (node.element is LibraryElement) {
      _wrongTypedNodes.add(node);
    }
    return null;
  }

  @override
  Object visitFunctionExpressionInvocation(FunctionExpressionInvocation node) {
    node.visitChildren(this);
    // TODO(brianwilkerson) If we start resolving function expressions, then conditionally check to
    // see whether the node was resolved correctly.
    return null;
    //checkResolved(node, node.getElement(), FunctionElement.class);
  }

  @override
  Object visitImportDirective(ImportDirective node) {
    // Not sure how to test the combinators given that it isn't an error if the names are not defined.
    _checkResolved(node, node.element, (node) => node is ImportElement);
    SimpleIdentifier prefix = node.prefix;
    if (prefix == null) {
      return null;
    }
    return _checkResolved(prefix, prefix.staticElement, (node) => node is PrefixElement);
  }

  @override
  Object visitIndexExpression(IndexExpression node) {
    node.visitChildren(this);
    DartType targetType = node.realTarget.staticType;
    if (targetType == null || targetType.isDynamic) {
      return null;
    }
    return _checkResolved(node, node.staticElement, (node) => node is MethodElement);
  }

  @override
  Object visitLibraryDirective(LibraryDirective node) => _checkResolved(node, node.element, (node) => node is LibraryElement);

  @override
  Object visitNamedExpression(NamedExpression node) => node.expression.accept(this);

  @override
  Object visitPartDirective(PartDirective node) => _checkResolved(node, node.element, (node) => node is CompilationUnitElement);

  @override
  Object visitPartOfDirective(PartOfDirective node) => _checkResolved(node, node.element, (node) => node is LibraryElement);

  @override
  Object visitPostfixExpression(PostfixExpression node) {
    node.visitChildren(this);
    if (!node.operator.isUserDefinableOperator) {
      return null;
    }
    DartType operandType = node.operand.staticType;
    if (operandType == null || operandType.isDynamic) {
      return null;
    }
    return _checkResolved(node, node.staticElement, (node) => node is MethodElement);
  }

  @override
  Object visitPrefixedIdentifier(PrefixedIdentifier node) {
    SimpleIdentifier prefix = node.prefix;
    prefix.accept(this);
    DartType prefixType = prefix.staticType;
    if (prefixType == null || prefixType.isDynamic) {
      return null;
    }
    return _checkResolved(node, node.staticElement, null);
  }

  @override
  Object visitPrefixExpression(PrefixExpression node) {
    node.visitChildren(this);
    if (!node.operator.isUserDefinableOperator) {
      return null;
    }
    DartType operandType = node.operand.staticType;
    if (operandType == null || operandType.isDynamic) {
      return null;
    }
    return _checkResolved(node, node.staticElement, (node) => node is MethodElement);
  }

  @override
  Object visitPropertyAccess(PropertyAccess node) {
    Expression target = node.realTarget;
    target.accept(this);
    DartType targetType = target.staticType;
    if (targetType == null || targetType.isDynamic) {
      return null;
    }
    return node.propertyName.accept(this);
  }

  @override
  Object visitSimpleIdentifier(SimpleIdentifier node) {
    if (node.name == "void") {
      return null;
    }
    AstNode parent = node.parent;
    if (parent is MethodInvocation) {
      MethodInvocation invocation = parent;
      if (identical(invocation.methodName, node)) {
        Expression target = invocation.realTarget;
        DartType targetType = target == null ? null : target.staticType;
        if (targetType == null || targetType.isDynamic) {
          return null;
        }
      }
    }
    return _checkResolved(node, node.staticElement, null);
  }

  Object _checkResolved(AstNode node, Element element, Predicate<Element> predicate) {
    if (element == null) {
      if (_knownExceptions == null || !_knownExceptions.contains(node)) {
        _unresolvedNodes.add(node);
      }
    } else if (predicate != null) {
      if (!predicate(element)) {
        _wrongTypedNodes.add(node);
      }
    }
    return null;
  }

  String _getFileName(AstNode node) {
    // TODO (jwren) there are two copies of this method, one here and one in StaticTypeVerifier,
    // they should be resolved into a single method
    if (node != null) {
      AstNode root = node.root;
      if (root is CompilationUnit) {
        CompilationUnit rootCU = root;
        if (rootCU.element != null) {
          return rootCU.element.source.fullName;
        } else {
          return "<unknown file- CompilationUnit.getElement() returned null>";
        }
      } else {
        return "<unknown file- CompilationUnit.getRoot() is not a CompilationUnit>";
      }
    }
    return "<unknown file- ASTNode is null>";
  }

  void _printNodes(PrintStringWriter writer, List<AstNode> nodes) {
    for (AstNode identifier in nodes) {
      writer.print("  ");
      writer.print(identifier.toString());
      writer.print(" (");
      writer.print(_getFileName(identifier));
      writer.print(" : ");
      writer.print(identifier.offset);
      writer.println(")");
    }
  }
}

class ResolverTestCase extends EngineTestCase {
  /**
   * The analysis context used to parse the compilation units being resolved.
   */
  AnalysisContextImpl analysisContext2;

  @override
  void setUp() {
    reset();
  }

  /**
   * Add a source file to the content provider. The file path should be absolute.
   *
   * @param filePath the path of the file being added
   * @param contents the contents to be returned by the content provider for the specified file
   * @return the source object representing the added file
   */
  Source addNamedSource(String filePath, String contents) {
    Source source = cacheSource(filePath, contents);
    ChangeSet changeSet = new ChangeSet();
    changeSet.addedSource(source);
    analysisContext2.applyChanges(changeSet);
    return source;
  }

  /**
   * Add a source file to the content provider.
   *
   * @param contents the contents to be returned by the content provider for the specified file
   * @return the source object representing the added file
   */
  Source addSource(String contents) => addNamedSource("/test.dart", contents);

  /**
   * Assert that the number of errors reported against the given source matches the number of errors
   * that are given and that they have the expected error codes. The order in which the errors were
   * gathered is ignored.
   *
   * @param source the source against which the errors should have been reported
   * @param expectedErrorCodes the error codes of the errors that should have been reported
   * @throws AnalysisException if the reported errors could not be computed
   * @throws AssertionFailedError if a different number of errors have been reported than were
   *           expected
   */
  void assertErrors(Source source, List<ErrorCode> expectedErrorCodes) {
    GatheringErrorListener errorListener = new GatheringErrorListener();
    for (AnalysisError error in analysisContext2.computeErrors(source)) {
      errorListener.onError(error);
    }
    errorListener.assertErrorsWithCodes(expectedErrorCodes);
  }

  /**
   * Assert that no errors have been reported against the given source.
   *
   * @param source the source against which no errors should have been reported
   * @throws AnalysisException if the reported errors could not be computed
   * @throws AssertionFailedError if any errors have been reported
   */
  void assertNoErrors(Source source) {
    assertErrors(source, []);
  }

  /**
   * Cache the source file content in the source factory but don't add the source to the analysis
   * context. The file path should be absolute.
   *
   * @param filePath the path of the file being cached
   * @param contents the contents to be returned by the content provider for the specified file
   * @return the source object representing the cached file
   */
  Source cacheSource(String filePath, String contents) {
    Source source = new FileBasedSource.con1(FileUtilities2.createFile(filePath));
    analysisContext2.setContents(source, contents);
    return source;
  }

  /**
   * Create a library element that represents a library named `"test"` containing a single
   * empty compilation unit.
   *
   * @return the library element that was created
   */
  LibraryElementImpl createDefaultTestLibrary() => createTestLibrary(new AnalysisContextImpl(), "test", []);

  /**
   * Create a library element that represents a library with the given name containing a single
   * empty compilation unit.
   *
   * @param libraryName the name of the library to be created
   * @return the library element that was created
   */
  LibraryElementImpl createTestLibrary(AnalysisContext context, String libraryName, List<String> typeNames) {
    int count = typeNames.length;
    List<CompilationUnitElementImpl> sourcedCompilationUnits = new List<CompilationUnitElementImpl>(count);
    for (int i = 0; i < count; i++) {
      String typeName = typeNames[i];
      ClassElementImpl type = new ClassElementImpl.forNode(AstFactory.identifier3(typeName));
      String fileName = "${typeName}.dart";
      CompilationUnitElementImpl compilationUnit = new CompilationUnitElementImpl(fileName);
      compilationUnit.source = _createNamedSource(fileName);
      compilationUnit.types = <ClassElement> [type];
      sourcedCompilationUnits[i] = compilationUnit;
    }
    String fileName = "${libraryName}.dart";
    CompilationUnitElementImpl compilationUnit = new CompilationUnitElementImpl(fileName);
    compilationUnit.source = _createNamedSource(fileName);
    LibraryElementImpl library = new LibraryElementImpl.forNode(context, AstFactory.libraryIdentifier2([libraryName]));
    library.definingCompilationUnit = compilationUnit;
    library.parts = sourcedCompilationUnits;
    return library;
  }

  /**
   * Enable optionally strict union types for the current test.
   *
   * @param strictUnionTypes `true` if union types should be strict.
   */
  void enableUnionTypes(bool strictUnionTypes) {
    AnalysisEngine.instance.enableUnionTypes = true;
    AnalysisEngine.instance.strictUnionTypes = strictUnionTypes;
  }

  Expression findTopLevelConstantExpression(CompilationUnit compilationUnit, String name) => findTopLevelDeclaration(compilationUnit, name).initializer;

  VariableDeclaration findTopLevelDeclaration(CompilationUnit compilationUnit, String name) {
    for (CompilationUnitMember member in compilationUnit.declarations) {
      if (member is TopLevelVariableDeclaration) {
        for (VariableDeclaration variable in member.variables.variables) {
          if (variable.name.name == name) {
            return variable;
          }
        }
      }
    }
    return null;
    // Not found
  }

  AnalysisContext get analysisContext => analysisContext2;

  /**
   * Return a type provider that can be used to test the results of resolution.
   *
   * @return a type provider
   * @throws AnalysisException if dart:core cannot be resolved
   */
  TypeProvider get typeProvider => analysisContext2.typeProvider;

  /**
   * In the rare cases we want to group several tests into single "test_" method, so need a way to
   * reset test instance to reuse it.
   */
  void reset() {
    analysisContext2 = AnalysisContextFactory.contextWithCore();
    // These defaults are duplicated for the editor in
    // editor/tools/plugins/com.google.dart.tools.core/.options .
    AnalysisEngine.instance.enableUnionTypes = false;
    AnalysisEngine.instance.strictUnionTypes = false;
  }

  /**
   * Reset the analysis context to have the 'enableAsync' option set to true.
   */
  void resetWithAsync() {
    AnalysisOptionsImpl options = new AnalysisOptionsImpl();
    options.enableAsync = true;
    analysisContext2 = AnalysisContextFactory.contextWithCoreAndOptions(options);
  }

  /**
   * Reset the analysis context to have the given options applied.
   *
   * @param options the analysis options to be applied to the context
   */
  void resetWithOptions(AnalysisOptions options) {
    analysisContext2 = AnalysisContextFactory.contextWithCoreAndOptions(options);
  }

  /**
   * Given a library and all of its parts, resolve the contents of the library and the contents of
   * the parts. This assumes that the sources for the library and its parts have already been added
   * to the content provider using the method [addNamedSource].
   *
   * @param librarySource the source for the compilation unit that defines the library
   * @return the element representing the resolved library
   * @throws AnalysisException if the analysis could not be performed
   */
  LibraryElement resolve(Source librarySource) => analysisContext2.computeLibraryElement(librarySource);

  /**
   * Return the resolved compilation unit corresponding to the given source in the given library.
   *
   * @param source the source of the compilation unit to be returned
   * @param library the library in which the compilation unit is to be resolved
   * @return the resolved compilation unit
   * @throws Exception if the compilation unit could not be resolved
   */
  CompilationUnit resolveCompilationUnit(Source source, LibraryElement library) => analysisContext2.resolveCompilationUnit(source, library);

  CompilationUnit resolveSource(String sourceText) => resolveSource2("/test.dart", sourceText);

  CompilationUnit resolveSource2(String fileName, String sourceText) {
    Source source = addNamedSource(fileName, sourceText);
    LibraryElement library = analysisContext.computeLibraryElement(source);
    return analysisContext.resolveCompilationUnit(source, library);
  }

  Source resolveSources(List<String> sourceTexts) {
    for (int i = 0; i < sourceTexts.length; i++) {
      CompilationUnit unit = resolveSource2("/lib${(i + 1)}.dart", sourceTexts[i]);
      // reference the source if this is the last source
      if (i + 1 == sourceTexts.length) {
        return unit.element.source;
      }
    }
    return null;
  }

  void resolveWithAndWithoutExperimental(List<String> strSources, List<ErrorCode> codesWithoutExperimental, List<ErrorCode> codesWithExperimental) {
    // Setup analysis context as non-experimental
    AnalysisOptionsImpl options = new AnalysisOptionsImpl();
    options.enableDeferredLoading = false;
    resetWithOptions(options);
    // Analysis and assertions
    Source source = resolveSources(strSources);
    assertErrors(source, codesWithoutExperimental);
    verify([source]);
    // Setup analysis context as experimental
    reset();
    // Analysis and assertions
    source = resolveSources(strSources);
    assertErrors(source, codesWithExperimental);
    verify([source]);
  }

  @override
  void tearDown() {
    analysisContext2 = null;
    super.tearDown();
  }

  /**
   * Verify that all of the identifiers in the compilation units associated with the given sources
   * have been resolved.
   *
   * @param resolvedElementMap a table mapping the AST nodes that have been resolved to the element
   *          to which they were resolved
   * @param sources the sources identifying the compilation units to be verified
   * @throws Exception if the contents of the compilation unit cannot be accessed
   */
  void verify(List<Source> sources) {
    ResolutionVerifier verifier = new ResolutionVerifier();
    for (Source source in sources) {
      analysisContext2.parseCompilationUnit(source).accept(verifier);
    }
    verifier.assertResolved();
  }

  /**
   * Create a source object representing a file with the given name and give it an empty content.
   *
   * @param fileName the name of the file for which a source is to be created
   * @return the source that was created
   */
  FileBasedSource _createNamedSource(String fileName) {
    FileBasedSource source = new FileBasedSource.con1(FileUtilities2.createFile(fileName));
    analysisContext2.setContents(source, "");
    return source;
  }
}

class ScopeBuilderTest extends EngineTestCase {
  void test_scopeFor_ClassDeclaration() {
    GatheringErrorListener listener = new GatheringErrorListener();
    Scope scope = ScopeBuilder.scopeFor(_createResolvedClassDeclaration(), listener);
    EngineTestCase.assertInstanceOf((obj) => obj is LibraryScope, LibraryScope, scope);
  }

  void test_scopeFor_ClassTypeAlias() {
    GatheringErrorListener listener = new GatheringErrorListener();
    Scope scope = ScopeBuilder.scopeFor(_createResolvedClassTypeAlias(), listener);
    EngineTestCase.assertInstanceOf((obj) => obj is LibraryScope, LibraryScope, scope);
  }

  void test_scopeFor_CompilationUnit() {
    GatheringErrorListener listener = new GatheringErrorListener();
    Scope scope = ScopeBuilder.scopeFor(_createResolvedCompilationUnit(), listener);
    EngineTestCase.assertInstanceOf((obj) => obj is LibraryScope, LibraryScope, scope);
  }

  void test_scopeFor_ConstructorDeclaration() {
    GatheringErrorListener listener = new GatheringErrorListener();
    Scope scope = ScopeBuilder.scopeFor(_createResolvedConstructorDeclaration(), listener);
    EngineTestCase.assertInstanceOf((obj) => obj is ClassScope, ClassScope, scope);
  }

  void test_scopeFor_ConstructorDeclaration_parameters() {
    GatheringErrorListener listener = new GatheringErrorListener();
    Scope scope = ScopeBuilder.scopeFor(_createResolvedConstructorDeclaration().parameters, listener);
    EngineTestCase.assertInstanceOf((obj) => obj is FunctionScope, FunctionScope, scope);
  }

  void test_scopeFor_FunctionDeclaration() {
    GatheringErrorListener listener = new GatheringErrorListener();
    Scope scope = ScopeBuilder.scopeFor(_createResolvedFunctionDeclaration(), listener);
    EngineTestCase.assertInstanceOf((obj) => obj is LibraryScope, LibraryScope, scope);
  }

  void test_scopeFor_FunctionDeclaration_parameters() {
    GatheringErrorListener listener = new GatheringErrorListener();
    Scope scope = ScopeBuilder.scopeFor(_createResolvedFunctionDeclaration().functionExpression.parameters, listener);
    EngineTestCase.assertInstanceOf((obj) => obj is FunctionScope, FunctionScope, scope);
  }

  void test_scopeFor_FunctionTypeAlias() {
    GatheringErrorListener listener = new GatheringErrorListener();
    Scope scope = ScopeBuilder.scopeFor(_createResolvedFunctionTypeAlias(), listener);
    EngineTestCase.assertInstanceOf((obj) => obj is LibraryScope, LibraryScope, scope);
  }

  void test_scopeFor_FunctionTypeAlias_parameters() {
    GatheringErrorListener listener = new GatheringErrorListener();
    Scope scope = ScopeBuilder.scopeFor(_createResolvedFunctionTypeAlias().parameters, listener);
    EngineTestCase.assertInstanceOf((obj) => obj is FunctionTypeScope, FunctionTypeScope, scope);
  }

  void test_scopeFor_MethodDeclaration() {
    GatheringErrorListener listener = new GatheringErrorListener();
    Scope scope = ScopeBuilder.scopeFor(_createResolvedMethodDeclaration(), listener);
    EngineTestCase.assertInstanceOf((obj) => obj is ClassScope, ClassScope, scope);
  }

  void test_scopeFor_MethodDeclaration_body() {
    GatheringErrorListener listener = new GatheringErrorListener();
    Scope scope = ScopeBuilder.scopeFor(_createResolvedMethodDeclaration().body, listener);
    EngineTestCase.assertInstanceOf((obj) => obj is FunctionScope, FunctionScope, scope);
  }

  void test_scopeFor_notInCompilationUnit() {
    GatheringErrorListener listener = new GatheringErrorListener();
    try {
      ScopeBuilder.scopeFor(AstFactory.identifier3("x"), listener);
      JUnitTestCase.fail("Expected AnalysisException");
    } on AnalysisException catch (exception) {
      // Expected
    }
  }

  void test_scopeFor_null() {
    GatheringErrorListener listener = new GatheringErrorListener();
    try {
      ScopeBuilder.scopeFor(null, listener);
      JUnitTestCase.fail("Expected AnalysisException");
    } on AnalysisException catch (exception) {
      // Expected
    }
  }

  void test_scopeFor_unresolved() {
    GatheringErrorListener listener = new GatheringErrorListener();
    try {
      ScopeBuilder.scopeFor(AstFactory.compilationUnit(), listener);
      JUnitTestCase.fail("Expected AnalysisException");
    } on AnalysisException catch (exception) {
      // Expected
    }
  }

  ClassDeclaration _createResolvedClassDeclaration() {
    CompilationUnit unit = _createResolvedCompilationUnit();
    String className = "C";
    ClassDeclaration classNode = AstFactory.classDeclaration(null, className, AstFactory.typeParameterList([]), null, null, null, []);
    unit.declarations.add(classNode);
    ClassElement classElement = ElementFactory.classElement2(className, []);
    classNode.name.staticElement = classElement;
    (unit.element as CompilationUnitElementImpl).types = <ClassElement> [classElement];
    return classNode;
  }

  ClassTypeAlias _createResolvedClassTypeAlias() {
    CompilationUnit unit = _createResolvedCompilationUnit();
    String className = "C";
    ClassTypeAlias classNode = AstFactory.classTypeAlias(className, AstFactory.typeParameterList([]), null, null, null, null);
    unit.declarations.add(classNode);
    ClassElement classElement = ElementFactory.classElement2(className, []);
    classNode.name.staticElement = classElement;
    (unit.element as CompilationUnitElementImpl).types = <ClassElement> [classElement];
    return classNode;
  }

  CompilationUnit _createResolvedCompilationUnit() {
    CompilationUnit unit = AstFactory.compilationUnit();
    LibraryElementImpl library = ElementFactory.library(AnalysisContextFactory.contextWithCore(), "lib");
    unit.element = library.definingCompilationUnit;
    return unit;
  }

  ConstructorDeclaration _createResolvedConstructorDeclaration() {
    ClassDeclaration classNode = _createResolvedClassDeclaration();
    String constructorName = "f";
    ConstructorDeclaration constructorNode = AstFactory.constructorDeclaration(AstFactory.identifier3(constructorName), null, AstFactory.formalParameterList([]), null);
    classNode.members.add(constructorNode);
    ConstructorElement constructorElement = ElementFactory.constructorElement2(classNode.element, null, []);
    constructorNode.element = constructorElement;
    (classNode.element as ClassElementImpl).constructors = <ConstructorElement> [constructorElement];
    return constructorNode;
  }

  FunctionDeclaration _createResolvedFunctionDeclaration() {
    CompilationUnit unit = _createResolvedCompilationUnit();
    String functionName = "f";
    FunctionDeclaration functionNode = AstFactory.functionDeclaration(null, null, functionName, AstFactory.functionExpression());
    unit.declarations.add(functionNode);
    FunctionElement functionElement = ElementFactory.functionElement(functionName);
    functionNode.name.staticElement = functionElement;
    (unit.element as CompilationUnitElementImpl).functions = <FunctionElement> [functionElement];
    return functionNode;
  }

  FunctionTypeAlias _createResolvedFunctionTypeAlias() {
    CompilationUnit unit = _createResolvedCompilationUnit();
    FunctionTypeAlias aliasNode = AstFactory.typeAlias(AstFactory.typeName4("A", []), "F", AstFactory.typeParameterList([]), AstFactory.formalParameterList([]));
    unit.declarations.add(aliasNode);
    SimpleIdentifier aliasName = aliasNode.name;
    FunctionTypeAliasElement aliasElement = new FunctionTypeAliasElementImpl.forNode(aliasName);
    aliasName.staticElement = aliasElement;
    (unit.element as CompilationUnitElementImpl).typeAliases = <FunctionTypeAliasElement> [aliasElement];
    return aliasNode;
  }

  MethodDeclaration _createResolvedMethodDeclaration() {
    ClassDeclaration classNode = _createResolvedClassDeclaration();
    String methodName = "f";
    MethodDeclaration methodNode = AstFactory.methodDeclaration(null, null, null, null, AstFactory.identifier3(methodName), AstFactory.formalParameterList([]));
    classNode.members.add(methodNode);
    MethodElement methodElement = ElementFactory.methodElement(methodName, null, []);
    methodNode.name.staticElement = methodElement;
    (classNode.element as ClassElementImpl).methods = <MethodElement> [methodElement];
    return methodNode;
  }
}

class ScopeTest extends ResolverTestCase {
  void test_define_duplicate() {
    GatheringErrorListener errorListener = new GatheringErrorListener();
    ScopeTest_TestScope scope = new ScopeTest_TestScope(errorListener);
    VariableElement element1 = ElementFactory.localVariableElement(AstFactory.identifier3("v1"));
    VariableElement element2 = ElementFactory.localVariableElement(AstFactory.identifier3("v1"));
    scope.define(element1);
    scope.define(element2);
    errorListener.assertErrorsWithSeverities([ErrorSeverity.ERROR]);
  }

  void test_define_normal() {
    GatheringErrorListener errorListener = new GatheringErrorListener();
    ScopeTest_TestScope scope = new ScopeTest_TestScope(errorListener);
    VariableElement element1 = ElementFactory.localVariableElement(AstFactory.identifier3("v1"));
    VariableElement element2 = ElementFactory.localVariableElement(AstFactory.identifier3("v2"));
    scope.define(element1);
    scope.define(element2);
    errorListener.assertNoErrors();
  }

  void test_getErrorListener() {
    GatheringErrorListener errorListener = new GatheringErrorListener();
    ScopeTest_TestScope scope = new ScopeTest_TestScope(errorListener);
    JUnitTestCase.assertEquals(errorListener, scope.errorListener);
  }

  void test_isPrivateName_nonPrivate() {
    JUnitTestCase.assertFalse(Scope.isPrivateName("Public"));
  }

  void test_isPrivateName_private() {
    JUnitTestCase.assertTrue(Scope.isPrivateName("_Private"));
  }
}

/**
 * A non-abstract subclass that can be used for testing purposes.
 */
class ScopeTest_TestScope extends Scope {
  /**
   * The listener that is to be informed when an error is encountered.
   */
  final AnalysisErrorListener errorListener;

  ScopeTest_TestScope(this.errorListener);

  @override
  Element internalLookup(Identifier identifier, String name, LibraryElement referencingLibrary) => localLookup(name, referencingLibrary);
}

class Scope_EnclosedScopeTest_test_define_duplicate extends Scope {
  GatheringErrorListener listener;

  Scope_EnclosedScopeTest_test_define_duplicate(this.listener) : super();

  @override
  AnalysisErrorListener get errorListener => listener;

  @override
  Element internalLookup(Identifier identifier, String name, LibraryElement referencingLibrary) => null;
}

class Scope_EnclosedScopeTest_test_define_normal extends Scope {
  GatheringErrorListener listener;

  Scope_EnclosedScopeTest_test_define_normal(this.listener) : super();

  @override
  AnalysisErrorListener get errorListener => listener;

  @override
  Element internalLookup(Identifier identifier, String name, LibraryElement referencingLibrary) => null;
}

class SimpleResolverTest extends ResolverTestCase {
  void fail_staticInvocation() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  static int get g => (a,b) => 0;",
        "}",
        "class B {",
        "  f() {",
        "    A.g(1,0);",
        "  }",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_argumentResolution_required_matching() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  void f() {",
        "    g(1, 2, 3);",
        "  }",
        "  void g(a, b, c) {}",
        "}"]));
    _validateArgumentResolution(source, [0, 1, 2]);
  }

  void test_argumentResolution_required_tooFew() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  void f() {",
        "    g(1, 2);",
        "  }",
        "  void g(a, b, c) {}",
        "}"]));
    _validateArgumentResolution(source, [0, 1]);
  }

  void test_argumentResolution_required_tooMany() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  void f() {",
        "    g(1, 2, 3);",
        "  }",
        "  void g(a, b) {}",
        "}"]));
    _validateArgumentResolution(source, [0, 1, -1]);
  }

  void test_argumentResolution_requiredAndNamed_extra() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  void f() {",
        "    g(1, 2, c: 3, d: 4);",
        "  }",
        "  void g(a, b, {c}) {}",
        "}"]));
    _validateArgumentResolution(source, [0, 1, 2, -1]);
  }

  void test_argumentResolution_requiredAndNamed_matching() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  void f() {",
        "    g(1, 2, c: 3);",
        "  }",
        "  void g(a, b, {c}) {}",
        "}"]));
    _validateArgumentResolution(source, [0, 1, 2]);
  }

  void test_argumentResolution_requiredAndNamed_missing() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  void f() {",
        "    g(1, 2, d: 3);",
        "  }",
        "  void g(a, b, {c, d}) {}",
        "}"]));
    _validateArgumentResolution(source, [0, 1, 3]);
  }

  void test_argumentResolution_requiredAndPositional_fewer() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  void f() {",
        "    g(1, 2, 3);",
        "  }",
        "  void g(a, b, [c, d]) {}",
        "}"]));
    _validateArgumentResolution(source, [0, 1, 2]);
  }

  void test_argumentResolution_requiredAndPositional_matching() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  void f() {",
        "    g(1, 2, 3, 4);",
        "  }",
        "  void g(a, b, [c, d]) {}",
        "}"]));
    _validateArgumentResolution(source, [0, 1, 2, 3]);
  }

  void test_argumentResolution_requiredAndPositional_more() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  void f() {",
        "    g(1, 2, 3, 4);",
        "  }",
        "  void g(a, b, [c]) {}",
        "}"]));
    _validateArgumentResolution(source, [0, 1, 2, -1]);
  }

  void test_argumentResolution_setter_propagated() {
    Source source = addSource(EngineTestCase.createSource([
        "main() {",
        "  var a = new A();",
        "  a.sss = 0;",
        "}",
        "class A {",
        "  set sss(x) {}",
        "}"]));
    LibraryElement library = resolve(source);
    CompilationUnitElement unit = library.definingCompilationUnit;
    // find "a.sss = 0"
    AssignmentExpression assignment;
    {
      FunctionElement mainElement = unit.functions[0];
      FunctionBody mainBody = mainElement.node.functionExpression.body;
      Statement statement = (mainBody as BlockFunctionBody).block.statements[1];
      ExpressionStatement expressionStatement = statement as ExpressionStatement;
      assignment = expressionStatement.expression as AssignmentExpression;
    }
    // get parameter
    Expression rhs = assignment.rightHandSide;
    JUnitTestCase.assertNull(rhs.staticParameterElement);
    ParameterElement parameter = rhs.propagatedParameterElement;
    JUnitTestCase.assertNotNull(parameter);
    JUnitTestCase.assertEquals("x", parameter.displayName);
    // validate
    ClassElement classA = unit.types[0];
    PropertyAccessorElement setter = classA.accessors[0];
    JUnitTestCase.assertSame(parameter, setter.parameters[0]);
  }

  void test_argumentResolution_setter_propagated_propertyAccess() {
    Source source = addSource(EngineTestCase.createSource([
        "main() {",
        "  var a = new A();",
        "  a.b.sss = 0;",
        "}",
        "class A {",
        "  B b = new B();",
        "}",
        "class B {",
        "  set sss(x) {}",
        "}"]));
    LibraryElement library = resolve(source);
    CompilationUnitElement unit = library.definingCompilationUnit;
    // find "a.b.sss = 0"
    AssignmentExpression assignment;
    {
      FunctionElement mainElement = unit.functions[0];
      FunctionBody mainBody = mainElement.node.functionExpression.body;
      Statement statement = (mainBody as BlockFunctionBody).block.statements[1];
      ExpressionStatement expressionStatement = statement as ExpressionStatement;
      assignment = expressionStatement.expression as AssignmentExpression;
    }
    // get parameter
    Expression rhs = assignment.rightHandSide;
    JUnitTestCase.assertNull(rhs.staticParameterElement);
    ParameterElement parameter = rhs.propagatedParameterElement;
    JUnitTestCase.assertNotNull(parameter);
    JUnitTestCase.assertEquals("x", parameter.displayName);
    // validate
    ClassElement classB = unit.types[1];
    PropertyAccessorElement setter = classB.accessors[0];
    JUnitTestCase.assertSame(parameter, setter.parameters[0]);
  }

  void test_argumentResolution_setter_static() {
    Source source = addSource(EngineTestCase.createSource([
        "main() {",
        "  A a = new A();",
        "  a.sss = 0;",
        "}",
        "class A {",
        "  set sss(x) {}",
        "}"]));
    LibraryElement library = resolve(source);
    CompilationUnitElement unit = library.definingCompilationUnit;
    // find "a.sss = 0"
    AssignmentExpression assignment;
    {
      FunctionElement mainElement = unit.functions[0];
      FunctionBody mainBody = mainElement.node.functionExpression.body;
      Statement statement = (mainBody as BlockFunctionBody).block.statements[1];
      ExpressionStatement expressionStatement = statement as ExpressionStatement;
      assignment = expressionStatement.expression as AssignmentExpression;
    }
    // get parameter
    Expression rhs = assignment.rightHandSide;
    ParameterElement parameter = rhs.staticParameterElement;
    JUnitTestCase.assertNotNull(parameter);
    JUnitTestCase.assertEquals("x", parameter.displayName);
    // validate
    ClassElement classA = unit.types[0];
    PropertyAccessorElement setter = classA.accessors[0];
    JUnitTestCase.assertSame(parameter, setter.parameters[0]);
  }

  void test_argumentResolution_setter_static_propertyAccess() {
    Source source = addSource(EngineTestCase.createSource([
        "main() {",
        "  A a = new A();",
        "  a.b.sss = 0;",
        "}",
        "class A {",
        "  B b = new B();",
        "}",
        "class B {",
        "  set sss(x) {}",
        "}"]));
    LibraryElement library = resolve(source);
    CompilationUnitElement unit = library.definingCompilationUnit;
    // find "a.b.sss = 0"
    AssignmentExpression assignment;
    {
      FunctionElement mainElement = unit.functions[0];
      FunctionBody mainBody = mainElement.node.functionExpression.body;
      Statement statement = (mainBody as BlockFunctionBody).block.statements[1];
      ExpressionStatement expressionStatement = statement as ExpressionStatement;
      assignment = expressionStatement.expression as AssignmentExpression;
    }
    // get parameter
    Expression rhs = assignment.rightHandSide;
    ParameterElement parameter = rhs.staticParameterElement;
    JUnitTestCase.assertNotNull(parameter);
    JUnitTestCase.assertEquals("x", parameter.displayName);
    // validate
    ClassElement classB = unit.types[1];
    PropertyAccessorElement setter = classB.accessors[0];
    JUnitTestCase.assertSame(parameter, setter.parameters[0]);
  }

  void test_class_definesCall() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  int call(int x) { return x; }",
        "}",
        "int f(A a) {",
        "  return a(0);",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_class_extends_implements() {
    Source source = addSource(EngineTestCase.createSource([
        "class A extends B implements C {}",
        "class B {}",
        "class C {}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_commentReference_class() {
    Source source = addSource(EngineTestCase.createSource([
        "f() {}",
        "/** [A] [new A] [A.n] [new A.n] [m] [f] */",
        "class A {",
        "  A() {}",
        "  A.n() {}",
        "  m() {}",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_commentReference_parameter() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  A() {}",
        "  A.n() {}",
        "  /** [e] [f] */",
        "  m(e, f()) {}",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_commentReference_singleLine() {
    Source source = addSource(EngineTestCase.createSource(["/// [A]", "class A {}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_empty() {
    Source source = addSource("");
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_entryPoint_exported() {
    addNamedSource("/two.dart", EngineTestCase.createSource(["library two;", "main() {}"]));
    Source source = addNamedSource("/one.dart", EngineTestCase.createSource(["library one;", "export 'two.dart';"]));
    LibraryElement library = resolve(source);
    JUnitTestCase.assertNotNull(library);
    FunctionElement main = library.entryPoint;
    JUnitTestCase.assertNotNull(main);
    JUnitTestCase.assertNotSame(library, main.library);
    assertNoErrors(source);
    verify([source]);
  }

  void test_entryPoint_local() {
    Source source = addNamedSource("/one.dart", EngineTestCase.createSource(["library one;", "main() {}"]));
    LibraryElement library = resolve(source);
    JUnitTestCase.assertNotNull(library);
    FunctionElement main = library.entryPoint;
    JUnitTestCase.assertNotNull(main);
    JUnitTestCase.assertSame(library, main.library);
    assertNoErrors(source);
    verify([source]);
  }

  void test_entryPoint_none() {
    Source source = addNamedSource("/one.dart", EngineTestCase.createSource(["library one;"]));
    LibraryElement library = resolve(source);
    JUnitTestCase.assertNotNull(library);
    JUnitTestCase.assertNull(library.entryPoint);
    assertNoErrors(source);
    verify([source]);
  }

  void test_extractedMethodAsConstant() {
    Source source = addSource(EngineTestCase.createSource([
        "abstract class Comparable<T> {",
        "  int compareTo(T other);",
        "  static int compare(Comparable a, Comparable b) => a.compareTo(b);",
        "}",
        "class A {",
        "  void sort([compare = Comparable.compare]) {}",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_fieldFormalParameter() {
    Source source = addSource(EngineTestCase.createSource(["class A {", "  int x;", "  A(this.x) {}", "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_forEachLoops_nonConflicting() {
    Source source = addSource(EngineTestCase.createSource([
        "f() {",
        "  List list = [1,2,3];",
        "  for (int x in list) {}",
        "  for (int x in list) {}",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_forLoops_nonConflicting() {
    Source source = addSource(EngineTestCase.createSource([
        "f() {",
        "  for (int i = 0; i < 3; i++) {",
        "  }",
        "  for (int i = 0; i < 3; i++) {",
        "  }",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_functionTypeAlias() {
    Source source = addSource(EngineTestCase.createSource([
        "typedef bool P(e);",
        "class A {",
        "  P p;",
        "  m(e) {",
        "    if (p(e)) {}",
        "  }",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_getterAndSetterWithDifferentTypes() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  int get f => 0;",
        "  void set f(String s) {}",
        "}",
        "g (A a) {",
        "  a.f = a.f.toString();",
        "}"]));
    resolve(source);
    assertErrors(source, [StaticWarningCode.MISMATCHED_GETTER_AND_SETTER_TYPES]);
    verify([source]);
  }

  void test_hasReferenceToSuper() {
    Source source = addSource(EngineTestCase.createSource(["class A {}", "class B {toString() => super.toString();}"]));
    LibraryElement library = resolve(source);
    JUnitTestCase.assertNotNull(library);
    CompilationUnitElement unit = library.definingCompilationUnit;
    JUnitTestCase.assertNotNull(unit);
    List<ClassElement> classes = unit.types;
    EngineTestCase.assertLength(2, classes);
    JUnitTestCase.assertFalse(classes[0].hasReferenceToSuper);
    JUnitTestCase.assertTrue(classes[1].hasReferenceToSuper);
    assertNoErrors(source);
    verify([source]);
  }

  void test_import_hide() {
    addNamedSource("lib1.dart", EngineTestCase.createSource(["library lib1;", "set foo(value) {}", "class A {}"]));
    addNamedSource("lib2.dart", EngineTestCase.createSource(["library lib2;", "set foo(value) {}"]));
    Source source = addNamedSource("lib3.dart", EngineTestCase.createSource([
        "import 'lib1.dart' hide foo;",
        "import 'lib2.dart';",
        "",
        "main() {",
        "  foo = 0;",
        "}",
        "A a;"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_import_prefix() {
    addNamedSource("/two.dart", EngineTestCase.createSource(["library two;", "f(int x) {", "  return x * x;", "}"]));
    Source source = addNamedSource("/one.dart", EngineTestCase.createSource([
        "library one;",
        "import 'two.dart' as _two;",
        "main() {",
        "  _two.f(0);",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_import_spaceInUri() {
    addNamedSource("sub folder/lib.dart", EngineTestCase.createSource(["library lib;", "foo() {}"]));
    Source source = addNamedSource("app.dart", EngineTestCase.createSource([
        "import 'sub folder/lib.dart';",
        "",
        "main() {",
        "  foo();",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_indexExpression_typeParameters() {
    Source source = addSource(EngineTestCase.createSource([
        "f() {",
        "  List<int> a;",
        "  a[0];",
        "  List<List<int>> b;",
        "  b[0][0];",
        "  List<List<List<int>>> c;",
        "  c[0][0][0];",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_indexExpression_typeParameters_invalidAssignmentWarning() {
    Source source = addSource(EngineTestCase.createSource(["f() {", "  List<List<int>> b;", "  b[0][0] = 'hi';", "}"]));
    resolve(source);
    assertErrors(source, [StaticTypeWarningCode.INVALID_ASSIGNMENT]);
    verify([source]);
  }

  void test_indirectOperatorThroughCall() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  B call() { return new B(); }",
        "}",
        "",
        "class B {",
        "  int operator [](int i) { return i; }",
        "}",
        "",
        "A f = new A();",
        "",
        "g(int x) {}",
        "",
        "main() {",
        "  g(f()[0]);",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_invoke_dynamicThroughGetter() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  List get X => [() => 0];",
        "  m(A a) {",
        "    X.last;",
        "  }",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_isValidMixin_badSuperclass() {
    Source source = addSource(EngineTestCase.createSource(["class A extends B {}", "class B {}"]));
    LibraryElement library = resolve(source);
    JUnitTestCase.assertNotNull(library);
    CompilationUnitElement unit = library.definingCompilationUnit;
    JUnitTestCase.assertNotNull(unit);
    List<ClassElement> classes = unit.types;
    EngineTestCase.assertLength(2, classes);
    JUnitTestCase.assertFalse(classes[0].isValidMixin);
    assertNoErrors(source);
    verify([source]);
  }

  void test_isValidMixin_constructor() {
    Source source = addSource(EngineTestCase.createSource(["class A {", "  A() {}", "}"]));
    LibraryElement library = resolve(source);
    JUnitTestCase.assertNotNull(library);
    CompilationUnitElement unit = library.definingCompilationUnit;
    JUnitTestCase.assertNotNull(unit);
    List<ClassElement> classes = unit.types;
    EngineTestCase.assertLength(1, classes);
    JUnitTestCase.assertFalse(classes[0].isValidMixin);
    assertNoErrors(source);
    verify([source]);
  }

  void test_isValidMixin_super() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  toString() {",
        "    return super.toString();",
        "  }",
        "}"]));
    LibraryElement library = resolve(source);
    JUnitTestCase.assertNotNull(library);
    CompilationUnitElement unit = library.definingCompilationUnit;
    JUnitTestCase.assertNotNull(unit);
    List<ClassElement> classes = unit.types;
    EngineTestCase.assertLength(1, classes);
    JUnitTestCase.assertFalse(classes[0].isValidMixin);
    assertNoErrors(source);
    verify([source]);
  }

  void test_isValidMixin_valid() {
    Source source = addSource(EngineTestCase.createSource(["class A {}"]));
    LibraryElement library = resolve(source);
    JUnitTestCase.assertNotNull(library);
    CompilationUnitElement unit = library.definingCompilationUnit;
    JUnitTestCase.assertNotNull(unit);
    List<ClassElement> classes = unit.types;
    EngineTestCase.assertLength(1, classes);
    JUnitTestCase.assertTrue(classes[0].isValidMixin);
    assertNoErrors(source);
    verify([source]);
  }

  void test_labels_switch() {
    Source source = addSource(EngineTestCase.createSource([
        "void doSwitch(int target) {",
        "  switch (target) {",
        "    l0: case 0:",
        "      continue l1;",
        "    l1: case 1:",
        "      continue l0;",
        "    default:",
        "      continue l1;",
        "  }",
        "}"]));
    LibraryElement library = resolve(source);
    JUnitTestCase.assertNotNull(library);
    assertNoErrors(source);
    verify([source]);
  }

  void test_localVariable_types_invoked() {
    Source source = addSource(EngineTestCase.createSource([
        "const A = null;",
        "main() {",
        "  var myVar = (int p) => 'foo';",
        "  myVar(42);",
        "}"]));
    LibraryElement library = resolve(source);
    JUnitTestCase.assertNotNull(library);
    CompilationUnit unit = analysisContext.getResolvedCompilationUnit(source, library);
    JUnitTestCase.assertNotNull(unit);
    List<bool> found = [false];
    List<CaughtException> thrownException = new List<CaughtException>(1);
    unit.accept(new RecursiveAstVisitor_SimpleResolverTest_test_localVariable_types_invoked(this, found, thrownException));
    if (thrownException[0] != null) {
      throw new AnalysisException("Exception", new CaughtException(thrownException[0], null));
    }
    JUnitTestCase.assertTrue(found[0]);
  }

  void test_metadata_class() {
    Source source = addSource(EngineTestCase.createSource(["const A = null;", "@A class C<A> {}"]));
    LibraryElement library = resolve(source);
    JUnitTestCase.assertNotNull(library);
    CompilationUnitElement unitElement = library.definingCompilationUnit;
    JUnitTestCase.assertNotNull(unitElement);
    List<ClassElement> classes = unitElement.types;
    EngineTestCase.assertLength(1, classes);
    List<ElementAnnotation> annotations = classes[0].metadata;
    EngineTestCase.assertLength(1, annotations);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    NodeList<CompilationUnitMember> declarations = unit.declarations;
    EngineTestCase.assertSizeOfList(2, declarations);
    Element expectedElement = (declarations[0] as TopLevelVariableDeclaration).variables.variables[0].name.staticElement;
    EngineTestCase.assertInstanceOf((obj) => obj is PropertyInducingElement, PropertyInducingElement, expectedElement);
    expectedElement = (expectedElement as PropertyInducingElement).getter;
    Element actualElement = (declarations[1] as ClassDeclaration).metadata[0].name.staticElement;
    JUnitTestCase.assertSame(expectedElement, actualElement);
  }

  void test_metadata_field() {
    Source source = addSource(EngineTestCase.createSource(["const A = null;", "class C {", "  @A int f;", "}"]));
    LibraryElement library = resolve(source);
    JUnitTestCase.assertNotNull(library);
    CompilationUnitElement unit = library.definingCompilationUnit;
    JUnitTestCase.assertNotNull(unit);
    List<ClassElement> classes = unit.types;
    EngineTestCase.assertLength(1, classes);
    FieldElement field = classes[0].fields[0];
    List<ElementAnnotation> annotations = field.metadata;
    EngineTestCase.assertLength(1, annotations);
    assertNoErrors(source);
    verify([source]);
  }

  void test_metadata_fieldFormalParameter() {
    Source source = addSource(EngineTestCase.createSource([
        "const A = null;",
        "class C {",
        "  int f;",
        "  C(@A this.f);",
        "}"]));
    LibraryElement library = resolve(source);
    JUnitTestCase.assertNotNull(library);
    CompilationUnitElement unit = library.definingCompilationUnit;
    JUnitTestCase.assertNotNull(unit);
    List<ClassElement> classes = unit.types;
    EngineTestCase.assertLength(1, classes);
    List<ConstructorElement> constructors = classes[0].constructors;
    EngineTestCase.assertLength(1, constructors);
    List<ParameterElement> parameters = constructors[0].parameters;
    EngineTestCase.assertLength(1, parameters);
    List<ElementAnnotation> annotations = parameters[0].metadata;
    EngineTestCase.assertLength(1, annotations);
    assertNoErrors(source);
    verify([source]);
  }

  void test_metadata_function() {
    Source source = addSource(EngineTestCase.createSource(["const A = null;", "@A f() {}"]));
    LibraryElement library = resolve(source);
    JUnitTestCase.assertNotNull(library);
    CompilationUnitElement unit = library.definingCompilationUnit;
    JUnitTestCase.assertNotNull(unit);
    List<FunctionElement> functions = unit.functions;
    EngineTestCase.assertLength(1, functions);
    List<ElementAnnotation> annotations = functions[0].metadata;
    EngineTestCase.assertLength(1, annotations);
    assertNoErrors(source);
    verify([source]);
  }

  void test_metadata_functionTypedParameter() {
    Source source = addSource(EngineTestCase.createSource(["const A = null;", "f(@A int p(int x)) {}"]));
    LibraryElement library = resolve(source);
    JUnitTestCase.assertNotNull(library);
    CompilationUnitElement unit = library.definingCompilationUnit;
    JUnitTestCase.assertNotNull(unit);
    List<FunctionElement> functions = unit.functions;
    EngineTestCase.assertLength(1, functions);
    List<ParameterElement> parameters = functions[0].parameters;
    EngineTestCase.assertLength(1, parameters);
    List<ElementAnnotation> annotations1 = parameters[0].metadata;
    EngineTestCase.assertLength(1, annotations1);
    assertNoErrors(source);
    verify([source]);
  }

  void test_metadata_libraryDirective() {
    Source source = addSource(EngineTestCase.createSource(["@A library lib;", "const A = null;"]));
    LibraryElement library = resolve(source);
    JUnitTestCase.assertNotNull(library);
    List<ElementAnnotation> annotations = library.metadata;
    EngineTestCase.assertLength(1, annotations);
    assertNoErrors(source);
    verify([source]);
  }

  void test_metadata_method() {
    Source source = addSource(EngineTestCase.createSource(["const A = null;", "class C {", "  @A void m() {}", "}"]));
    LibraryElement library = resolve(source);
    JUnitTestCase.assertNotNull(library);
    CompilationUnitElement unit = library.definingCompilationUnit;
    JUnitTestCase.assertNotNull(unit);
    List<ClassElement> classes = unit.types;
    EngineTestCase.assertLength(1, classes);
    MethodElement method = classes[0].methods[0];
    List<ElementAnnotation> annotations = method.metadata;
    EngineTestCase.assertLength(1, annotations);
    assertNoErrors(source);
    verify([source]);
  }

  void test_metadata_namedParameter() {
    Source source = addSource(EngineTestCase.createSource(["const A = null;", "f({@A int p : 0}) {}"]));
    LibraryElement library = resolve(source);
    JUnitTestCase.assertNotNull(library);
    CompilationUnitElement unit = library.definingCompilationUnit;
    JUnitTestCase.assertNotNull(unit);
    List<FunctionElement> functions = unit.functions;
    EngineTestCase.assertLength(1, functions);
    List<ParameterElement> parameters = functions[0].parameters;
    EngineTestCase.assertLength(1, parameters);
    List<ElementAnnotation> annotations1 = parameters[0].metadata;
    EngineTestCase.assertLength(1, annotations1);
    assertNoErrors(source);
    verify([source]);
  }

  void test_metadata_positionalParameter() {
    Source source = addSource(EngineTestCase.createSource(["const A = null;", "f([@A int p = 0]) {}"]));
    LibraryElement library = resolve(source);
    JUnitTestCase.assertNotNull(library);
    CompilationUnitElement unit = library.definingCompilationUnit;
    JUnitTestCase.assertNotNull(unit);
    List<FunctionElement> functions = unit.functions;
    EngineTestCase.assertLength(1, functions);
    List<ParameterElement> parameters = functions[0].parameters;
    EngineTestCase.assertLength(1, parameters);
    List<ElementAnnotation> annotations1 = parameters[0].metadata;
    EngineTestCase.assertLength(1, annotations1);
    assertNoErrors(source);
    verify([source]);
  }

  void test_metadata_simpleParameter() {
    Source source = addSource(EngineTestCase.createSource(["const A = null;", "f(@A p1, @A int p2) {}"]));
    LibraryElement library = resolve(source);
    JUnitTestCase.assertNotNull(library);
    CompilationUnitElement unit = library.definingCompilationUnit;
    JUnitTestCase.assertNotNull(unit);
    List<FunctionElement> functions = unit.functions;
    EngineTestCase.assertLength(1, functions);
    List<ParameterElement> parameters = functions[0].parameters;
    EngineTestCase.assertLength(2, parameters);
    List<ElementAnnotation> annotations1 = parameters[0].metadata;
    EngineTestCase.assertLength(1, annotations1);
    List<ElementAnnotation> annotations2 = parameters[1].metadata;
    EngineTestCase.assertLength(1, annotations2);
    assertNoErrors(source);
    verify([source]);
  }

  void test_metadata_typedef() {
    Source source = addSource(EngineTestCase.createSource(["const A = null;", "@A typedef F<A>();"]));
    LibraryElement library = resolve(source);
    JUnitTestCase.assertNotNull(library);
    CompilationUnitElement unitElement = library.definingCompilationUnit;
    JUnitTestCase.assertNotNull(unitElement);
    List<FunctionTypeAliasElement> aliases = unitElement.functionTypeAliases;
    EngineTestCase.assertLength(1, aliases);
    List<ElementAnnotation> annotations = aliases[0].metadata;
    EngineTestCase.assertLength(1, annotations);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    NodeList<CompilationUnitMember> declarations = unit.declarations;
    EngineTestCase.assertSizeOfList(2, declarations);
    Element expectedElement = (declarations[0] as TopLevelVariableDeclaration).variables.variables[0].name.staticElement;
    EngineTestCase.assertInstanceOf((obj) => obj is PropertyInducingElement, PropertyInducingElement, expectedElement);
    expectedElement = (expectedElement as PropertyInducingElement).getter;
    Element actualElement = (declarations[1] as FunctionTypeAlias).metadata[0].name.staticElement;
    JUnitTestCase.assertSame(expectedElement, actualElement);
  }

  void test_method_fromMixin() {
    Source source = addSource(EngineTestCase.createSource([
        "class B {",
        "  bar() => 1;",
        "}",
        "class A {",
        "  foo() => 2;",
        "}",
        "",
        "class C extends B with A {",
        "  bar() => super.bar();",
        "  foo() => super.foo();",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_method_fromSuperclassMixin() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  void m1() {}",
        "}",
        "class B extends Object with A {",
        "}",
        "class C extends B {",
        "}",
        "f(C c) {",
        "  c.m1();",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_methodCascades() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  void m1() {}",
        "  void m2() {}",
        "  void m() {",
        "    A a = new A();",
        "    a..m1()",
        "     ..m2();",
        "  }",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_methodCascades_withSetter() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  String name;",
        "  void m1() {}",
        "  void m2() {}",
        "  void m() {",
        "    A a = new A();",
        "    a..m1()",
        "     ..name = 'name'",
        "     ..m2();",
        "  }",
        "}"]));
    resolve(source);
    // failing with error code: INVOCATION_OF_NON_FUNCTION
    assertNoErrors(source);
    verify([source]);
  }

  void test_resolveAgainstNull() {
    Source source = addSource(EngineTestCase.createSource(["f(var p) {", "  return null == p;", "}"]));
    resolve(source);
    assertNoErrors(source);
  }

  void test_setter_inherited() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  int get x => 0;",
        "  set x(int p) {}",
        "}",
        "class B extends A {",
        "  int get x => super.x == null ? 0 : super.x;",
        "  int f() => x = 1;",
        "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  void test_setter_static() {
    Source source = addSource(EngineTestCase.createSource(["set s(x) {", "}", "", "main() {", "  s = 123;", "}"]));
    resolve(source);
    assertNoErrors(source);
    verify([source]);
  }

  /**
   * Resolve the given source and verify that the arguments in a specific method invocation were
   * correctly resolved.
   *
   * The source is expected to be source for a compilation unit, the first declaration is expected
   * to be a class, the first member of which is expected to be a method with a block body, and the
   * first statement in the body is expected to be an expression statement whose expression is a
   * method invocation. It is the arguments to that method invocation that are tested. The method
   * invocation can contain errors.
   *
   * The arguments were resolved correctly if the number of expressions in the list matches the
   * length of the array of indices and if, for each index in the array of indices, the parameter to
   * which the argument expression was resolved is the parameter in the invoked method's list of
   * parameters at that index. Arguments that should not be resolved to a parameter because of an
   * error can be denoted by including a negative index in the array of indices.
   *
   * @param source the source to be resolved
   * @param indices the array of indices used to associate arguments with parameters
   * @throws Exception if the source could not be resolved or if the structure of the source is not
   *           valid
   */
  void _validateArgumentResolution(Source source, List<int> indices) {
    LibraryElement library = resolve(source);
    JUnitTestCase.assertNotNull(library);
    ClassElement classElement = library.definingCompilationUnit.types[0];
    List<ParameterElement> parameters = classElement.methods[1].parameters;
    CompilationUnit unit = resolveCompilationUnit(source, library);
    JUnitTestCase.assertNotNull(unit);
    ClassDeclaration classDeclaration = unit.declarations[0] as ClassDeclaration;
    MethodDeclaration methodDeclaration = classDeclaration.members[0] as MethodDeclaration;
    Block block = (methodDeclaration.body as BlockFunctionBody).block;
    ExpressionStatement statement = block.statements[0] as ExpressionStatement;
    MethodInvocation invocation = statement.expression as MethodInvocation;
    NodeList<Expression> arguments = invocation.argumentList.arguments;
    int argumentCount = arguments.length;
    JUnitTestCase.assertEquals(indices.length, argumentCount);
    for (int i = 0; i < argumentCount; i++) {
      Expression argument = arguments[i];
      ParameterElement element = argument.staticParameterElement;
      int index = indices[i];
      if (index < 0) {
        JUnitTestCase.assertNull(element);
      } else {
        JUnitTestCase.assertSame(parameters[index], element);
      }
    }
  }
}

class SourceContainer_ChangeSetTest_test_toString implements SourceContainer {
  @override
  bool contains(Source source) => false;
}

class StaticTypeAnalyzerTest extends EngineTestCase {
  /**
   * The error listener to which errors will be reported.
   */
  GatheringErrorListener _listener;

  /**
   * The resolver visitor used to create the analyzer.
   */
  ResolverVisitor _visitor;

  /**
   * The analyzer being used to analyze the test cases.
   */
  StaticTypeAnalyzer _analyzer;

  /**
   * The type provider used to access the types.
   */
  TestTypeProvider _typeProvider;

  void fail_visitFunctionExpressionInvocation() {
    JUnitTestCase.fail("Not yet tested");
    _listener.assertNoErrors();
  }

  void fail_visitMethodInvocation() {
    JUnitTestCase.fail("Not yet tested");
    _listener.assertNoErrors();
  }

  void fail_visitSimpleIdentifier() {
    JUnitTestCase.fail("Not yet tested");
    _listener.assertNoErrors();
  }

  @override
  void setUp() {
    _listener = new GatheringErrorListener();
    _typeProvider = new TestTypeProvider();
    _analyzer = _createAnalyzer();
  }

  void test_visitAdjacentStrings() {
    // "a" "b"
    Expression node = AstFactory.adjacentStrings([_resolvedString("a"), _resolvedString("b")]);
    JUnitTestCase.assertSame(_typeProvider.stringType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitAsExpression() {
    // class A { ... this as B ... }
    // class B extends A {}
    ClassElement superclass = ElementFactory.classElement2("A", []);
    InterfaceType superclassType = superclass.type;
    ClassElement subclass = ElementFactory.classElement("B", superclassType, []);
    Expression node = AstFactory.asExpression(AstFactory.thisExpression(), AstFactory.typeName(subclass, []));
    JUnitTestCase.assertSame(subclass.type, _analyze3(node, superclassType));
    _listener.assertNoErrors();
  }

  void test_visitAssignmentExpression_compound() {
    // i += 1
    InterfaceType numType = _typeProvider.numType;
    SimpleIdentifier identifier = _resolvedVariable(_typeProvider.intType, "i");
    AssignmentExpression node = AstFactory.assignmentExpression(identifier, TokenType.PLUS_EQ, _resolvedInteger(1));
    MethodElement plusMethod = getMethod(numType, "+");
    node.staticElement = plusMethod;
    JUnitTestCase.assertSame(numType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitAssignmentExpression_simple() {
    // i = 0
    InterfaceType intType = _typeProvider.intType;
    Expression node = AstFactory.assignmentExpression(_resolvedVariable(intType, "i"), TokenType.EQ, _resolvedInteger(0));
    JUnitTestCase.assertSame(intType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitBinaryExpression_equals() {
    // 2 == 3
    Expression node = AstFactory.binaryExpression(_resolvedInteger(2), TokenType.EQ_EQ, _resolvedInteger(3));
    JUnitTestCase.assertSame(_typeProvider.boolType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitBinaryExpression_logicalAnd() {
    // false && true
    Expression node = AstFactory.binaryExpression(AstFactory.booleanLiteral(false), TokenType.AMPERSAND_AMPERSAND, AstFactory.booleanLiteral(true));
    JUnitTestCase.assertSame(_typeProvider.boolType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitBinaryExpression_logicalOr() {
    // false || true
    Expression node = AstFactory.binaryExpression(AstFactory.booleanLiteral(false), TokenType.BAR_BAR, AstFactory.booleanLiteral(true));
    JUnitTestCase.assertSame(_typeProvider.boolType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitBinaryExpression_notEquals() {
    // 2 != 3
    Expression node = AstFactory.binaryExpression(_resolvedInteger(2), TokenType.BANG_EQ, _resolvedInteger(3));
    JUnitTestCase.assertSame(_typeProvider.boolType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitBinaryExpression_plusID() {
    // 1 + 2.0
    BinaryExpression node = AstFactory.binaryExpression(_resolvedInteger(1), TokenType.PLUS, _resolvedDouble(2.0));
    node.staticElement = getMethod(_typeProvider.numType, "+");
    JUnitTestCase.assertSame(_typeProvider.doubleType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitBinaryExpression_plusII() {
    // 1 + 2
    BinaryExpression node = AstFactory.binaryExpression(_resolvedInteger(1), TokenType.PLUS, _resolvedInteger(2));
    node.staticElement = getMethod(_typeProvider.numType, "+");
    JUnitTestCase.assertSame(_typeProvider.intType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitBinaryExpression_slash() {
    // 2 / 2
    BinaryExpression node = AstFactory.binaryExpression(_resolvedInteger(2), TokenType.SLASH, _resolvedInteger(2));
    node.staticElement = getMethod(_typeProvider.numType, "/");
    JUnitTestCase.assertSame(_typeProvider.doubleType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitBinaryExpression_star_notSpecial() {
    // class A {
    //   A operator *(double value);
    // }
    // (a as A) * 2.0
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    InterfaceType typeA = classA.type;
    MethodElement operator = ElementFactory.methodElement("*", typeA, [_typeProvider.doubleType]);
    classA.methods = <MethodElement> [operator];
    BinaryExpression node = AstFactory.binaryExpression(AstFactory.asExpression(AstFactory.identifier3("a"), AstFactory.typeName(classA, [])), TokenType.PLUS, _resolvedDouble(2.0));
    node.staticElement = operator;
    JUnitTestCase.assertSame(typeA, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitBinaryExpression_starID() {
    // 1 * 2.0
    BinaryExpression node = AstFactory.binaryExpression(_resolvedInteger(1), TokenType.PLUS, _resolvedDouble(2.0));
    node.staticElement = getMethod(_typeProvider.numType, "*");
    JUnitTestCase.assertSame(_typeProvider.doubleType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitBooleanLiteral_false() {
    // false
    Expression node = AstFactory.booleanLiteral(false);
    JUnitTestCase.assertSame(_typeProvider.boolType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitBooleanLiteral_true() {
    // true
    Expression node = AstFactory.booleanLiteral(true);
    JUnitTestCase.assertSame(_typeProvider.boolType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitCascadeExpression() {
    // a..length
    Expression node = AstFactory.cascadeExpression(_resolvedString("a"), [AstFactory.propertyAccess2(null, "length")]);
    JUnitTestCase.assertSame(_typeProvider.stringType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitConditionalExpression_differentTypes() {
    // true ? 1.0 : 0
    Expression node = AstFactory.conditionalExpression(AstFactory.booleanLiteral(true), _resolvedDouble(1.0), _resolvedInteger(0));
    JUnitTestCase.assertSame(_typeProvider.numType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitConditionalExpression_sameTypes() {
    // true ? 1 : 0
    Expression node = AstFactory.conditionalExpression(AstFactory.booleanLiteral(true), _resolvedInteger(1), _resolvedInteger(0));
    JUnitTestCase.assertSame(_typeProvider.intType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitDoubleLiteral() {
    // 4.33
    Expression node = AstFactory.doubleLiteral(4.33);
    JUnitTestCase.assertSame(_typeProvider.doubleType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitFunctionExpression_named_block() {
    // ({p1 : 0, p2 : 0}) {}
    DartType dynamicType = _typeProvider.dynamicType;
    FormalParameter p1 = AstFactory.namedFormalParameter(AstFactory.simpleFormalParameter3("p1"), _resolvedInteger(0));
    _setType(p1, dynamicType);
    FormalParameter p2 = AstFactory.namedFormalParameter(AstFactory.simpleFormalParameter3("p2"), _resolvedInteger(0));
    _setType(p2, dynamicType);
    FunctionExpression node = _resolvedFunctionExpression(AstFactory.formalParameterList([p1, p2]), AstFactory.blockFunctionBody2([]));
    _analyze5(p1);
    _analyze5(p2);
    DartType resultType = _analyze(node);
    Map<String, DartType> expectedNamedTypes = new HashMap<String, DartType>();
    expectedNamedTypes["p1"] = dynamicType;
    expectedNamedTypes["p2"] = dynamicType;
    _assertFunctionType(dynamicType, null, null, expectedNamedTypes, resultType);
    _listener.assertNoErrors();
  }

  void test_visitFunctionExpression_named_expression() {
    // ({p : 0}) -> 0;
    DartType dynamicType = _typeProvider.dynamicType;
    FormalParameter p = AstFactory.namedFormalParameter(AstFactory.simpleFormalParameter3("p"), _resolvedInteger(0));
    _setType(p, dynamicType);
    FunctionExpression node = _resolvedFunctionExpression(AstFactory.formalParameterList([p]), AstFactory.expressionFunctionBody(_resolvedInteger(0)));
    _analyze5(p);
    DartType resultType = _analyze(node);
    Map<String, DartType> expectedNamedTypes = new HashMap<String, DartType>();
    expectedNamedTypes["p"] = dynamicType;
    _assertFunctionType(_typeProvider.intType, null, null, expectedNamedTypes, resultType);
    _listener.assertNoErrors();
  }

  void test_visitFunctionExpression_normal_block() {
    // (p1, p2) {}
    DartType dynamicType = _typeProvider.dynamicType;
    FormalParameter p1 = AstFactory.simpleFormalParameter3("p1");
    _setType(p1, dynamicType);
    FormalParameter p2 = AstFactory.simpleFormalParameter3("p2");
    _setType(p2, dynamicType);
    FunctionExpression node = _resolvedFunctionExpression(AstFactory.formalParameterList([p1, p2]), AstFactory.blockFunctionBody2([]));
    _analyze5(p1);
    _analyze5(p2);
    DartType resultType = _analyze(node);
    _assertFunctionType(dynamicType, <DartType> [dynamicType, dynamicType], null, null, resultType);
    _listener.assertNoErrors();
  }

  void test_visitFunctionExpression_normal_expression() {
    // (p1, p2) -> 0
    DartType dynamicType = _typeProvider.dynamicType;
    FormalParameter p = AstFactory.simpleFormalParameter3("p");
    _setType(p, dynamicType);
    FunctionExpression node = _resolvedFunctionExpression(AstFactory.formalParameterList([p]), AstFactory.expressionFunctionBody(_resolvedInteger(0)));
    _analyze5(p);
    DartType resultType = _analyze(node);
    _assertFunctionType(_typeProvider.intType, <DartType> [dynamicType], null, null, resultType);
    _listener.assertNoErrors();
  }

  void test_visitFunctionExpression_normalAndNamed_block() {
    // (p1, {p2 : 0}) {}
    DartType dynamicType = _typeProvider.dynamicType;
    FormalParameter p1 = AstFactory.simpleFormalParameter3("p1");
    _setType(p1, dynamicType);
    FormalParameter p2 = AstFactory.namedFormalParameter(AstFactory.simpleFormalParameter3("p2"), _resolvedInteger(0));
    _setType(p2, dynamicType);
    FunctionExpression node = _resolvedFunctionExpression(AstFactory.formalParameterList([p1, p2]), AstFactory.blockFunctionBody2([]));
    _analyze5(p2);
    DartType resultType = _analyze(node);
    Map<String, DartType> expectedNamedTypes = new HashMap<String, DartType>();
    expectedNamedTypes["p2"] = dynamicType;
    _assertFunctionType(dynamicType, <DartType> [dynamicType], null, expectedNamedTypes, resultType);
    _listener.assertNoErrors();
  }

  void test_visitFunctionExpression_normalAndNamed_expression() {
    // (p1, {p2 : 0}) -> 0
    DartType dynamicType = _typeProvider.dynamicType;
    FormalParameter p1 = AstFactory.simpleFormalParameter3("p1");
    _setType(p1, dynamicType);
    FormalParameter p2 = AstFactory.namedFormalParameter(AstFactory.simpleFormalParameter3("p2"), _resolvedInteger(0));
    _setType(p2, dynamicType);
    FunctionExpression node = _resolvedFunctionExpression(AstFactory.formalParameterList([p1, p2]), AstFactory.expressionFunctionBody(_resolvedInteger(0)));
    _analyze5(p2);
    DartType resultType = _analyze(node);
    Map<String, DartType> expectedNamedTypes = new HashMap<String, DartType>();
    expectedNamedTypes["p2"] = dynamicType;
    _assertFunctionType(_typeProvider.intType, <DartType> [dynamicType], null, expectedNamedTypes, resultType);
    _listener.assertNoErrors();
  }

  void test_visitFunctionExpression_normalAndPositional_block() {
    // (p1, [p2 = 0]) {}
    DartType dynamicType = _typeProvider.dynamicType;
    FormalParameter p1 = AstFactory.simpleFormalParameter3("p1");
    _setType(p1, dynamicType);
    FormalParameter p2 = AstFactory.positionalFormalParameter(AstFactory.simpleFormalParameter3("p2"), _resolvedInteger(0));
    _setType(p2, dynamicType);
    FunctionExpression node = _resolvedFunctionExpression(AstFactory.formalParameterList([p1, p2]), AstFactory.blockFunctionBody2([]));
    _analyze5(p1);
    _analyze5(p2);
    DartType resultType = _analyze(node);
    _assertFunctionType(dynamicType, <DartType> [dynamicType], <DartType> [dynamicType], null, resultType);
    _listener.assertNoErrors();
  }

  void test_visitFunctionExpression_normalAndPositional_expression() {
    // (p1, [p2 = 0]) -> 0
    DartType dynamicType = _typeProvider.dynamicType;
    FormalParameter p1 = AstFactory.simpleFormalParameter3("p1");
    _setType(p1, dynamicType);
    FormalParameter p2 = AstFactory.positionalFormalParameter(AstFactory.simpleFormalParameter3("p2"), _resolvedInteger(0));
    _setType(p2, dynamicType);
    FunctionExpression node = _resolvedFunctionExpression(AstFactory.formalParameterList([p1, p2]), AstFactory.expressionFunctionBody(_resolvedInteger(0)));
    _analyze5(p1);
    _analyze5(p2);
    DartType resultType = _analyze(node);
    _assertFunctionType(_typeProvider.intType, <DartType> [dynamicType], <DartType> [dynamicType], null, resultType);
    _listener.assertNoErrors();
  }

  void test_visitFunctionExpression_positional_block() {
    // ([p1 = 0, p2 = 0]) {}
    DartType dynamicType = _typeProvider.dynamicType;
    FormalParameter p1 = AstFactory.positionalFormalParameter(AstFactory.simpleFormalParameter3("p1"), _resolvedInteger(0));
    _setType(p1, dynamicType);
    FormalParameter p2 = AstFactory.positionalFormalParameter(AstFactory.simpleFormalParameter3("p2"), _resolvedInteger(0));
    _setType(p2, dynamicType);
    FunctionExpression node = _resolvedFunctionExpression(AstFactory.formalParameterList([p1, p2]), AstFactory.blockFunctionBody2([]));
    _analyze5(p1);
    _analyze5(p2);
    DartType resultType = _analyze(node);
    _assertFunctionType(dynamicType, null, <DartType> [dynamicType, dynamicType], null, resultType);
    _listener.assertNoErrors();
  }

  void test_visitFunctionExpression_positional_expression() {
    // ([p1 = 0, p2 = 0]) -> 0
    DartType dynamicType = _typeProvider.dynamicType;
    FormalParameter p = AstFactory.positionalFormalParameter(AstFactory.simpleFormalParameter3("p"), _resolvedInteger(0));
    _setType(p, dynamicType);
    FunctionExpression node = _resolvedFunctionExpression(AstFactory.formalParameterList([p]), AstFactory.expressionFunctionBody(_resolvedInteger(0)));
    _analyze5(p);
    DartType resultType = _analyze(node);
    _assertFunctionType(_typeProvider.intType, null, <DartType> [dynamicType], null, resultType);
    _listener.assertNoErrors();
  }

  void test_visitIndexExpression_getter() {
    // List a;
    // a[2]
    InterfaceType listType = _typeProvider.listType;
    SimpleIdentifier identifier = _resolvedVariable(listType, "a");
    IndexExpression node = AstFactory.indexExpression(identifier, _resolvedInteger(2));
    MethodElement indexMethod = listType.element.methods[0];
    node.staticElement = indexMethod;
    JUnitTestCase.assertSame(listType.typeArguments[0], _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitIndexExpression_setter() {
    // List a;
    // a[2] = 0
    InterfaceType listType = _typeProvider.listType;
    SimpleIdentifier identifier = _resolvedVariable(listType, "a");
    IndexExpression node = AstFactory.indexExpression(identifier, _resolvedInteger(2));
    MethodElement indexMethod = listType.element.methods[1];
    node.staticElement = indexMethod;
    AstFactory.assignmentExpression(node, TokenType.EQ, AstFactory.integer(0));
    JUnitTestCase.assertSame(listType.typeArguments[0], _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitIndexExpression_typeParameters() {
    // List<int> list = ...
    // list[0]
    InterfaceType intType = _typeProvider.intType;
    InterfaceType listType = _typeProvider.listType;
    // (int) -> E
    MethodElement methodElement = getMethod(listType, "[]");
    // "list" has type List<int>
    SimpleIdentifier identifier = AstFactory.identifier3("list");
    InterfaceType listOfIntType = listType.substitute4(<DartType> [intType]);
    identifier.staticType = listOfIntType;
    // list[0] has MethodElement element (int) -> E
    IndexExpression indexExpression = AstFactory.indexExpression(identifier, AstFactory.integer(0));
    MethodElement indexMethod = MethodMember.from(methodElement, listOfIntType);
    indexExpression.staticElement = indexMethod;
    // analyze and assert result of the index expression
    JUnitTestCase.assertSame(intType, _analyze(indexExpression));
    _listener.assertNoErrors();
  }

  void test_visitIndexExpression_typeParameters_inSetterContext() {
    // List<int> list = ...
    // list[0] = 0;
    InterfaceType intType = _typeProvider.intType;
    InterfaceType listType = _typeProvider.listType;
    // (int, E) -> void
    MethodElement methodElement = getMethod(listType, "[]=");
    // "list" has type List<int>
    SimpleIdentifier identifier = AstFactory.identifier3("list");
    InterfaceType listOfIntType = listType.substitute4(<DartType> [intType]);
    identifier.staticType = listOfIntType;
    // list[0] has MethodElement element (int) -> E
    IndexExpression indexExpression = AstFactory.indexExpression(identifier, AstFactory.integer(0));
    MethodElement indexMethod = MethodMember.from(methodElement, listOfIntType);
    indexExpression.staticElement = indexMethod;
    // list[0] should be in a setter context
    AstFactory.assignmentExpression(indexExpression, TokenType.EQ, AstFactory.integer(0));
    // analyze and assert result of the index expression
    JUnitTestCase.assertSame(intType, _analyze(indexExpression));
    _listener.assertNoErrors();
  }

  void test_visitInstanceCreationExpression_named() {
    // new C.m()
    ClassElementImpl classElement = ElementFactory.classElement2("C", []);
    String constructorName = "m";
    ConstructorElementImpl constructor = ElementFactory.constructorElement2(classElement, constructorName, []);
    constructor.returnType = classElement.type;
    FunctionTypeImpl constructorType = new FunctionTypeImpl.con1(constructor);
    constructor.type = constructorType;
    classElement.constructors = <ConstructorElement> [constructor];
    InstanceCreationExpression node = AstFactory.instanceCreationExpression2(null, AstFactory.typeName(classElement, []), [AstFactory.identifier3(constructorName)]);
    node.staticElement = constructor;
    JUnitTestCase.assertSame(classElement.type, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitInstanceCreationExpression_typeParameters() {
    // new C<I>()
    ClassElementImpl elementC = ElementFactory.classElement2("C", ["E"]);
    ClassElementImpl elementI = ElementFactory.classElement2("I", []);
    ConstructorElementImpl constructor = ElementFactory.constructorElement2(elementC, null, []);
    elementC.constructors = <ConstructorElement> [constructor];
    constructor.returnType = elementC.type;
    FunctionTypeImpl constructorType = new FunctionTypeImpl.con1(constructor);
    constructor.type = constructorType;
    TypeName typeName = AstFactory.typeName(elementC, [AstFactory.typeName(elementI, [])]);
    typeName.type = elementC.type.substitute4(<DartType> [elementI.type]);
    InstanceCreationExpression node = AstFactory.instanceCreationExpression2(null, typeName, []);
    node.staticElement = constructor;
    InterfaceType interfaceType = _analyze(node) as InterfaceType;
    List<DartType> typeArgs = interfaceType.typeArguments;
    JUnitTestCase.assertEquals(1, typeArgs.length);
    JUnitTestCase.assertEquals(elementI.type, typeArgs[0]);
    _listener.assertNoErrors();
  }

  void test_visitInstanceCreationExpression_unnamed() {
    // new C()
    ClassElementImpl classElement = ElementFactory.classElement2("C", []);
    ConstructorElementImpl constructor = ElementFactory.constructorElement2(classElement, null, []);
    constructor.returnType = classElement.type;
    FunctionTypeImpl constructorType = new FunctionTypeImpl.con1(constructor);
    constructor.type = constructorType;
    classElement.constructors = <ConstructorElement> [constructor];
    InstanceCreationExpression node = AstFactory.instanceCreationExpression2(null, AstFactory.typeName(classElement, []), []);
    node.staticElement = constructor;
    JUnitTestCase.assertSame(classElement.type, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitIntegerLiteral() {
    // 42
    Expression node = _resolvedInteger(42);
    JUnitTestCase.assertSame(_typeProvider.intType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitIsExpression_negated() {
    // a is! String
    Expression node = AstFactory.isExpression(_resolvedString("a"), true, AstFactory.typeName4("String", []));
    JUnitTestCase.assertSame(_typeProvider.boolType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitIsExpression_notNegated() {
    // a is String
    Expression node = AstFactory.isExpression(_resolvedString("a"), false, AstFactory.typeName4("String", []));
    JUnitTestCase.assertSame(_typeProvider.boolType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitListLiteral_empty() {
    // []
    Expression node = AstFactory.listLiteral([]);
    DartType resultType = _analyze(node);
    _assertType2(_typeProvider.listType.substitute4(<DartType> [_typeProvider.dynamicType]), resultType);
    _listener.assertNoErrors();
  }

  void test_visitListLiteral_nonEmpty() {
    // [0]
    Expression node = AstFactory.listLiteral([_resolvedInteger(0)]);
    DartType resultType = _analyze(node);
    _assertType2(_typeProvider.listType.substitute4(<DartType> [_typeProvider.dynamicType]), resultType);
    _listener.assertNoErrors();
  }

  void test_visitMapLiteral_empty() {
    // {}
    Expression node = AstFactory.mapLiteral2([]);
    DartType resultType = _analyze(node);
    _assertType2(_typeProvider.mapType.substitute4(<DartType> [_typeProvider.dynamicType, _typeProvider.dynamicType]), resultType);
    _listener.assertNoErrors();
  }

  void test_visitMapLiteral_nonEmpty() {
    // {"k" : 0}
    Expression node = AstFactory.mapLiteral2([AstFactory.mapLiteralEntry("k", _resolvedInteger(0))]);
    DartType resultType = _analyze(node);
    _assertType2(_typeProvider.mapType.substitute4(<DartType> [_typeProvider.dynamicType, _typeProvider.dynamicType]), resultType);
    _listener.assertNoErrors();
  }

  void test_visitMethodInvocation_then() {
    // then()
    Expression node = AstFactory.methodInvocation(null, "then", []);
    _analyze(node);
    _listener.assertNoErrors();
  }

  void test_visitNamedExpression() {
    // n: a
    Expression node = AstFactory.namedExpression2("n", _resolvedString("a"));
    JUnitTestCase.assertSame(_typeProvider.stringType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitNullLiteral() {
    // null
    Expression node = AstFactory.nullLiteral();
    JUnitTestCase.assertSame(_typeProvider.bottomType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitParenthesizedExpression() {
    // (0)
    Expression node = AstFactory.parenthesizedExpression(_resolvedInteger(0));
    JUnitTestCase.assertSame(_typeProvider.intType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitPostfixExpression_minusMinus() {
    // 0--
    PostfixExpression node = AstFactory.postfixExpression(_resolvedInteger(0), TokenType.MINUS_MINUS);
    JUnitTestCase.assertSame(_typeProvider.intType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitPostfixExpression_plusPlus() {
    // 0++
    PostfixExpression node = AstFactory.postfixExpression(_resolvedInteger(0), TokenType.PLUS_PLUS);
    JUnitTestCase.assertSame(_typeProvider.intType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitPrefixedIdentifier_getter() {
    DartType boolType = _typeProvider.boolType;
    PropertyAccessorElementImpl getter = ElementFactory.getterElement("b", false, boolType);
    PrefixedIdentifier node = AstFactory.identifier5("a", "b");
    node.identifier.staticElement = getter;
    JUnitTestCase.assertSame(boolType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitPrefixedIdentifier_setter() {
    DartType boolType = _typeProvider.boolType;
    FieldElementImpl field = ElementFactory.fieldElement("b", false, false, false, boolType);
    PropertyAccessorElement setter = field.setter;
    PrefixedIdentifier node = AstFactory.identifier5("a", "b");
    node.identifier.staticElement = setter;
    JUnitTestCase.assertSame(boolType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitPrefixedIdentifier_variable() {
    VariableElementImpl variable = ElementFactory.localVariableElement2("b");
    variable.type = _typeProvider.boolType;
    PrefixedIdentifier node = AstFactory.identifier5("a", "b");
    node.identifier.staticElement = variable;
    JUnitTestCase.assertSame(_typeProvider.boolType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitPrefixExpression_bang() {
    // !0
    PrefixExpression node = AstFactory.prefixExpression(TokenType.BANG, _resolvedInteger(0));
    JUnitTestCase.assertSame(_typeProvider.boolType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitPrefixExpression_minus() {
    // -0
    PrefixExpression node = AstFactory.prefixExpression(TokenType.MINUS, _resolvedInteger(0));
    MethodElement minusMethod = getMethod(_typeProvider.numType, "-");
    node.staticElement = minusMethod;
    JUnitTestCase.assertSame(_typeProvider.numType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitPrefixExpression_minusMinus() {
    // --0
    PrefixExpression node = AstFactory.prefixExpression(TokenType.MINUS_MINUS, _resolvedInteger(0));
    MethodElement minusMethod = getMethod(_typeProvider.numType, "-");
    node.staticElement = minusMethod;
    JUnitTestCase.assertSame(_typeProvider.intType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitPrefixExpression_not() {
    // !true
    Expression node = AstFactory.prefixExpression(TokenType.BANG, AstFactory.booleanLiteral(true));
    JUnitTestCase.assertSame(_typeProvider.boolType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitPrefixExpression_plusPlus() {
    // ++0
    PrefixExpression node = AstFactory.prefixExpression(TokenType.PLUS_PLUS, _resolvedInteger(0));
    MethodElement plusMethod = getMethod(_typeProvider.numType, "+");
    node.staticElement = plusMethod;
    JUnitTestCase.assertSame(_typeProvider.intType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitPrefixExpression_tilde() {
    // ~0
    PrefixExpression node = AstFactory.prefixExpression(TokenType.TILDE, _resolvedInteger(0));
    MethodElement tildeMethod = getMethod(_typeProvider.intType, "~");
    node.staticElement = tildeMethod;
    JUnitTestCase.assertSame(_typeProvider.intType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitPropertyAccess_propagated_getter() {
    DartType boolType = _typeProvider.boolType;
    PropertyAccessorElementImpl getter = ElementFactory.getterElement("b", false, boolType);
    PropertyAccess node = AstFactory.propertyAccess2(AstFactory.identifier3("a"), "b");
    node.propertyName.propagatedElement = getter;
    JUnitTestCase.assertSame(boolType, _analyze2(node, false));
    _listener.assertNoErrors();
  }

  void test_visitPropertyAccess_propagated_setter() {
    DartType boolType = _typeProvider.boolType;
    FieldElementImpl field = ElementFactory.fieldElement("b", false, false, false, boolType);
    PropertyAccessorElement setter = field.setter;
    PropertyAccess node = AstFactory.propertyAccess2(AstFactory.identifier3("a"), "b");
    node.propertyName.propagatedElement = setter;
    JUnitTestCase.assertSame(boolType, _analyze2(node, false));
    _listener.assertNoErrors();
  }

  void test_visitPropertyAccess_static_getter() {
    DartType boolType = _typeProvider.boolType;
    PropertyAccessorElementImpl getter = ElementFactory.getterElement("b", false, boolType);
    PropertyAccess node = AstFactory.propertyAccess2(AstFactory.identifier3("a"), "b");
    node.propertyName.staticElement = getter;
    JUnitTestCase.assertSame(boolType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitPropertyAccess_static_setter() {
    DartType boolType = _typeProvider.boolType;
    FieldElementImpl field = ElementFactory.fieldElement("b", false, false, false, boolType);
    PropertyAccessorElement setter = field.setter;
    PropertyAccess node = AstFactory.propertyAccess2(AstFactory.identifier3("a"), "b");
    node.propertyName.staticElement = setter;
    JUnitTestCase.assertSame(boolType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitSimpleStringLiteral() {
    // "a"
    Expression node = _resolvedString("a");
    JUnitTestCase.assertSame(_typeProvider.stringType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitStringInterpolation() {
    // "a${'b'}c"
    Expression node = AstFactory.string([
        AstFactory.interpolationString("a", "a"),
        AstFactory.interpolationExpression(_resolvedString("b")),
        AstFactory.interpolationString("c", "c")]);
    JUnitTestCase.assertSame(_typeProvider.stringType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitSuperExpression() {
    // super
    InterfaceType superType = ElementFactory.classElement2("A", []).type;
    InterfaceType thisType = ElementFactory.classElement("B", superType, []).type;
    Expression node = AstFactory.superExpression();
    JUnitTestCase.assertSame(thisType, _analyze3(node, thisType));
    _listener.assertNoErrors();
  }

  void test_visitSymbolLiteral() {
    JUnitTestCase.assertSame(_typeProvider.symbolType, _analyze(AstFactory.symbolLiteral(["a"])));
  }

  void test_visitThisExpression() {
    // this
    InterfaceType thisType = ElementFactory.classElement("B", ElementFactory.classElement2("A", []).type, []).type;
    Expression node = AstFactory.thisExpression();
    JUnitTestCase.assertSame(thisType, _analyze3(node, thisType));
    _listener.assertNoErrors();
  }

  void test_visitThrowExpression_withoutValue() {
    // throw
    Expression node = AstFactory.throwExpression();
    JUnitTestCase.assertSame(_typeProvider.bottomType, _analyze(node));
    _listener.assertNoErrors();
  }

  void test_visitThrowExpression_withValue() {
    // throw 0
    Expression node = AstFactory.throwExpression2(_resolvedInteger(0));
    JUnitTestCase.assertSame(_typeProvider.bottomType, _analyze(node));
    _listener.assertNoErrors();
  }

  /**
   * Return the type associated with the given expression after the static type analyzer has
   * computed a type for it.
   *
   * @param node the expression with which the type is associated
   * @return the type associated with the expression
   */
  DartType _analyze(Expression node) => _analyze4(node, null, true);

  /**
   * Return the type associated with the given expression after the static or propagated type
   * analyzer has computed a type for it.
   *
   * @param node the expression with which the type is associated
   * @param useStaticType `true` if the static type is being requested, and `false` if
   *          the propagated type is being requested
   * @return the type associated with the expression
   */
  DartType _analyze2(Expression node, bool useStaticType) => _analyze4(node, null, useStaticType);

  /**
   * Return the type associated with the given expression after the static type analyzer has
   * computed a type for it.
   *
   * @param node the expression with which the type is associated
   * @param thisType the type of 'this'
   * @return the type associated with the expression
   */
  DartType _analyze3(Expression node, InterfaceType thisType) => _analyze4(node, thisType, true);

  /**
   * Return the type associated with the given expression after the static type analyzer has
   * computed a type for it.
   *
   * @param node the expression with which the type is associated
   * @param thisType the type of 'this'
   * @param useStaticType `true` if the static type is being requested, and `false` if
   *          the propagated type is being requested
   * @return the type associated with the expression
   */
  DartType _analyze4(Expression node, InterfaceType thisType, bool useStaticType) {
    try {
      _analyzer.thisType_J2DAccessor = thisType;
    } catch (exception) {
      throw new IllegalArgumentException("Could not set type of 'this'", exception);
    }
    node.accept(_analyzer);
    if (useStaticType) {
      return node.staticType;
    } else {
      return node.propagatedType;
    }
  }

  /**
   * Return the type associated with the given parameter after the static type analyzer has computed
   * a type for it.
   *
   * @param node the parameter with which the type is associated
   * @return the type associated with the parameter
   */
  DartType _analyze5(FormalParameter node) {
    node.accept(_analyzer);
    return (node.identifier.staticElement as ParameterElement).type;
  }

  /**
   * Assert that the actual type is a function type with the expected characteristics.
   *
   * @param expectedReturnType the expected return type of the function
   * @param expectedNormalTypes the expected types of the normal parameters
   * @param expectedOptionalTypes the expected types of the optional parameters
   * @param expectedNamedTypes the expected types of the named parameters
   * @param actualType the type being tested
   */
  void _assertFunctionType(DartType expectedReturnType, List<DartType> expectedNormalTypes, List<DartType> expectedOptionalTypes, Map<String, DartType> expectedNamedTypes, DartType actualType) {
    EngineTestCase.assertInstanceOf((obj) => obj is FunctionType, FunctionType, actualType);
    FunctionType functionType = actualType as FunctionType;
    List<DartType> normalTypes = functionType.normalParameterTypes;
    if (expectedNormalTypes == null) {
      EngineTestCase.assertLength(0, normalTypes);
    } else {
      int expectedCount = expectedNormalTypes.length;
      EngineTestCase.assertLength(expectedCount, normalTypes);
      for (int i = 0; i < expectedCount; i++) {
        JUnitTestCase.assertSame(expectedNormalTypes[i], normalTypes[i]);
      }
    }
    List<DartType> optionalTypes = functionType.optionalParameterTypes;
    if (expectedOptionalTypes == null) {
      EngineTestCase.assertLength(0, optionalTypes);
    } else {
      int expectedCount = expectedOptionalTypes.length;
      EngineTestCase.assertLength(expectedCount, optionalTypes);
      for (int i = 0; i < expectedCount; i++) {
        JUnitTestCase.assertSame(expectedOptionalTypes[i], optionalTypes[i]);
      }
    }
    Map<String, DartType> namedTypes = functionType.namedParameterTypes;
    if (expectedNamedTypes == null) {
      EngineTestCase.assertSizeOfMap(0, namedTypes);
    } else {
      EngineTestCase.assertSizeOfMap(expectedNamedTypes.length, namedTypes);
      for (MapEntry<String, DartType> entry in getMapEntrySet(expectedNamedTypes)) {
        JUnitTestCase.assertSame(entry.getValue(), namedTypes[entry.getKey()]);
      }
    }
    JUnitTestCase.assertSame(expectedReturnType, functionType.returnType);
  }

  void _assertType(InterfaceTypeImpl expectedType, InterfaceTypeImpl actualType) {
    JUnitTestCase.assertEquals(expectedType.displayName, actualType.displayName);
    JUnitTestCase.assertEquals(expectedType.element, actualType.element);
    List<DartType> expectedArguments = expectedType.typeArguments;
    int length = expectedArguments.length;
    List<DartType> actualArguments = actualType.typeArguments;
    EngineTestCase.assertLength(length, actualArguments);
    for (int i = 0; i < length; i++) {
      _assertType2(expectedArguments[i], actualArguments[i]);
    }
  }

  void _assertType2(DartType expectedType, DartType actualType) {
    if (expectedType is InterfaceTypeImpl) {
      EngineTestCase.assertInstanceOf((obj) => obj is InterfaceTypeImpl, InterfaceTypeImpl, actualType);
      _assertType(expectedType, actualType as InterfaceTypeImpl);
    }
    // TODO(brianwilkerson) Compare other kinds of types then make this a shared utility method
  }

  /**
   * Create the analyzer used by the tests.
   *
   * @return the analyzer to be used by the tests
   */
  StaticTypeAnalyzer _createAnalyzer() {
    AnalysisContextImpl context = new AnalysisContextImpl();
    SourceFactory sourceFactory = new SourceFactory([new DartUriResolver(DirectoryBasedDartSdk.defaultSdk)]);
    context.sourceFactory = sourceFactory;
    FileBasedSource source = new FileBasedSource.con1(FileUtilities2.createFile("/lib.dart"));
    CompilationUnitElementImpl definingCompilationUnit = new CompilationUnitElementImpl("lib.dart");
    definingCompilationUnit.source = source;
    LibraryElementImpl definingLibrary = new LibraryElementImpl.forNode(context, null);
    definingLibrary.definingCompilationUnit = definingCompilationUnit;
    Library library = new Library(context, _listener, source);
    library.libraryElement = definingLibrary;
    _visitor = new ResolverVisitor.con1(library, source, _typeProvider);
    _visitor.overrideManager.enterScope();
    try {
      return _visitor.typeAnalyzer_J2DAccessor as StaticTypeAnalyzer;
    } catch (exception) {
      throw new IllegalArgumentException("Could not create analyzer", exception);
    }
  }

  /**
   * Return an integer literal that has been resolved to the correct type.
   *
   * @param value the value of the literal
   * @return an integer literal that has been resolved to the correct type
   */
  DoubleLiteral _resolvedDouble(double value) {
    DoubleLiteral literal = AstFactory.doubleLiteral(value);
    literal.staticType = _typeProvider.doubleType;
    return literal;
  }

  /**
   * Create a function expression that has an element associated with it, where the element has an
   * incomplete type associated with it (just like the one
   * [ElementBuilder#visitFunctionExpression] would have built if we had
   * run it).
   *
   * @param parameters the parameters to the function
   * @param body the body of the function
   * @return a resolved function expression
   */
  FunctionExpression _resolvedFunctionExpression(FormalParameterList parameters, FunctionBody body) {
    List<ParameterElement> parameterElements = new List<ParameterElement>();
    for (FormalParameter parameter in parameters.parameters) {
      ParameterElementImpl element = new ParameterElementImpl.forNode(parameter.identifier);
      element.parameterKind = parameter.kind;
      element.type = _typeProvider.dynamicType;
      parameter.identifier.staticElement = element;
      parameterElements.add(element);
    }
    FunctionExpression node = AstFactory.functionExpression2(parameters, body);
    FunctionElementImpl element = new FunctionElementImpl.forNode(null);
    element.parameters = new List.from(parameterElements);
    element.type = new FunctionTypeImpl.con1(element);
    node.element = element;
    return node;
  }

  /**
   * Return an integer literal that has been resolved to the correct type.
   *
   * @param value the value of the literal
   * @return an integer literal that has been resolved to the correct type
   */
  IntegerLiteral _resolvedInteger(int value) {
    IntegerLiteral literal = AstFactory.integer(value);
    literal.staticType = _typeProvider.intType;
    return literal;
  }

  /**
   * Return a string literal that has been resolved to the correct type.
   *
   * @param value the value of the literal
   * @return a string literal that has been resolved to the correct type
   */
  SimpleStringLiteral _resolvedString(String value) {
    SimpleStringLiteral string = AstFactory.string2(value);
    string.staticType = _typeProvider.stringType;
    return string;
  }

  /**
   * Return a simple identifier that has been resolved to a variable element with the given type.
   *
   * @param type the type of the variable being represented
   * @param variableName the name of the variable
   * @return a simple identifier that has been resolved to a variable element with the given type
   */
  SimpleIdentifier _resolvedVariable(InterfaceType type, String variableName) {
    SimpleIdentifier identifier = AstFactory.identifier3(variableName);
    VariableElementImpl element = ElementFactory.localVariableElement(identifier);
    element.type = type;
    identifier.staticElement = element;
    identifier.staticType = type;
    return identifier;
  }

  /**
   * Set the type of the given parameter to the given type.
   *
   * @param parameter the parameter whose type is to be set
   * @param type the new type of the given parameter
   */
  void _setType(FormalParameter parameter, DartType type) {
    SimpleIdentifier identifier = parameter.identifier;
    Element element = identifier.staticElement;
    if (element is! ParameterElement) {
      element = new ParameterElementImpl.forNode(identifier);
      identifier.staticElement = element;
    }
    (element as ParameterElementImpl).type = type;
  }
}


/**
 * Like [StaticTypeAnalyzerTest], but as end-to-end tests.
 */
class StaticTypeAnalyzer2Test extends ResolverTestCase {
  String testCode;
  Source testSource;
  CompilationUnit testUnit;

  void test_MethodInvocation_nameType_localVariable() {
    String code = r"""
typedef Foo();
main() {
  Foo foo;
  foo();
}
""";
    _resolveTestUnit(code);
    // "foo" should be resolved to the "Foo" type
    SimpleIdentifier identifier = _findIdentifier("foo();");
    DartType type = identifier.staticType;
    _ut.expect(type, new _ut.isInstanceOf<FunctionType>());
  }

  void test_MethodInvocation_nameType_parameter_FunctionTypeAlias() {
    String code = r"""
typedef Foo();
main(Foo foo) {
  foo();
}
""";
    _resolveTestUnit(code);
    // "foo" should be resolved to the "Foo" type
    SimpleIdentifier identifier = _findIdentifier("foo();");
    DartType type = identifier.staticType;
    _ut.expect(type, new _ut.isInstanceOf<FunctionType>());
  }

  void test_MethodInvocation_nameType_parameter_propagatedType() {
    String code = r"""
typedef Foo();
main(p) {
  if (p is Foo) {
    p();
  }
}
""";
    _resolveTestUnit(code);
    SimpleIdentifier identifier = _findIdentifier("p()");
    _ut.expect(identifier.staticType, DynamicTypeImpl.instance);
    {
      FunctionType type = identifier.propagatedType;
      _ut.expect(type, _ut.isNotNull);
      _ut.expect(type.name, 'Foo');
    }
  }

  SimpleIdentifier _findIdentifier(String search) {
    SimpleIdentifier identifier = EngineTestCase.findNode(
        testUnit,
        testCode,
        search,
        (node) => node is SimpleIdentifier);
    return identifier;
  }

  void _resolveTestUnit(String code) {
    testCode = code;
    testSource = addSource(testCode);
    LibraryElement library = resolve(testSource);
    assertNoErrors(testSource);
    verify([testSource]);
    testUnit = resolveCompilationUnit(testSource, library);
  }
}

/**
 * Instances of the class `StaticTypeVerifier` verify that all of the nodes in an AST
 * structure that should have a static type associated with them do have a static type.
 */
class StaticTypeVerifier extends GeneralizingAstVisitor<Object> {
  /**
   * A list containing all of the AST Expression nodes that were not resolved.
   */
  List<Expression> _unresolvedExpressions = new List<Expression>();

  /**
   * A list containing all of the AST Expression nodes for which a propagated type was computed but
   * where that type was not more specific than the static type.
   */
  List<Expression> _invalidlyPropagatedExpressions = new List<Expression>();

  /**
   * A list containing all of the AST TypeName nodes that were not resolved.
   */
  List<TypeName> _unresolvedTypes = new List<TypeName>();

  /**
   * Counter for the number of Expression nodes visited that are resolved.
   */
  int _resolvedExpressionCount = 0;

  /**
   * Counter for the number of Expression nodes visited that have propagated type information.
   */
  int _propagatedExpressionCount = 0;

  /**
   * Counter for the number of TypeName nodes visited that are resolved.
   */
  int _resolvedTypeCount = 0;

  /**
   * Assert that all of the visited nodes have a static type associated with them.
   */
  void assertResolved() {
    if (!_unresolvedExpressions.isEmpty || !_unresolvedTypes.isEmpty) {
      PrintStringWriter writer = new PrintStringWriter();
      int unresolvedTypeCount = _unresolvedTypes.length;
      if (unresolvedTypeCount > 0) {
        writer.print("Failed to resolve ");
        writer.print(unresolvedTypeCount);
        writer.print(" of ");
        writer.print(_resolvedTypeCount + unresolvedTypeCount);
        writer.println(" type names:");
        for (TypeName identifier in _unresolvedTypes) {
          writer.print("  ");
          writer.print(identifier.toString());
          writer.print(" (");
          writer.print(_getFileName(identifier));
          writer.print(" : ");
          writer.print(identifier.offset);
          writer.println(")");
        }
      }
      int unresolvedExpressionCount = _unresolvedExpressions.length;
      if (unresolvedExpressionCount > 0) {
        writer.println("Failed to resolve ");
        writer.print(unresolvedExpressionCount);
        writer.print(" of ");
        writer.print(_resolvedExpressionCount + unresolvedExpressionCount);
        writer.println(" expressions:");
        for (Expression expression in _unresolvedExpressions) {
          writer.print("  ");
          writer.print(expression.toString());
          writer.print(" (");
          writer.print(_getFileName(expression));
          writer.print(" : ");
          writer.print(expression.offset);
          writer.println(")");
        }
      }
      int invalidlyPropagatedExpressionCount = _invalidlyPropagatedExpressions.length;
      if (invalidlyPropagatedExpressionCount > 0) {
        writer.println("Incorrectly propagated ");
        writer.print(invalidlyPropagatedExpressionCount);
        writer.print(" of ");
        writer.print(_propagatedExpressionCount);
        writer.println(" expressions:");
        for (Expression expression in _invalidlyPropagatedExpressions) {
          writer.print("  ");
          writer.print(expression.toString());
          writer.print(" [");
          writer.print(expression.staticType.displayName);
          writer.print(", ");
          writer.print(expression.propagatedType.displayName);
          writer.println("]");
          writer.print("    ");
          writer.print(_getFileName(expression));
          writer.print(" : ");
          writer.print(expression.offset);
          writer.println(")");
        }
      }
      JUnitTestCase.fail(writer.toString());
    }
  }

  @override
  Object visitBreakStatement(BreakStatement node) => null;

  @override
  Object visitCommentReference(CommentReference node) => null;

  @override
  Object visitContinueStatement(ContinueStatement node) => null;

  @override
  Object visitExportDirective(ExportDirective node) => null;

  @override
  Object visitExpression(Expression node) {
    node.visitChildren(this);
    DartType staticType = node.staticType;
    if (staticType == null) {
      _unresolvedExpressions.add(node);
    } else {
      _resolvedExpressionCount++;
      DartType propagatedType = node.propagatedType;
      if (propagatedType != null) {
        _propagatedExpressionCount++;
        if (!propagatedType.isMoreSpecificThan(staticType)) {
          _invalidlyPropagatedExpressions.add(node);
        }
      }
    }
    return null;
  }

  @override
  Object visitImportDirective(ImportDirective node) => null;

  @override
  Object visitLabel(Label node) => null;

  @override
  Object visitLibraryIdentifier(LibraryIdentifier node) => null;

  @override
  Object visitPrefixedIdentifier(PrefixedIdentifier node) {
    // In cases where we have a prefixed identifier where the prefix is dynamic, we don't want to
    // assert that the node will have a type.
    if (node.staticType == null && node.prefix.staticType.isDynamic) {
      return null;
    }
    return super.visitPrefixedIdentifier(node);
  }

  @override
  Object visitSimpleIdentifier(SimpleIdentifier node) {
    // In cases where identifiers are being used for something other than an expressions,
    // then they can be ignored.
    AstNode parent = node.parent;
    if (parent is MethodInvocation && identical(node, parent.methodName)) {
      return null;
    } else if (parent is RedirectingConstructorInvocation && identical(node, parent.constructorName)) {
      return null;
    } else if (parent is SuperConstructorInvocation && identical(node, parent.constructorName)) {
      return null;
    } else if (parent is ConstructorName && identical(node, parent.name)) {
      return null;
    } else if (parent is ConstructorFieldInitializer && identical(node, parent.fieldName)) {
      return null;
    } else if (node.staticElement is PrefixElement) {
      // Prefixes don't have a type.
      return null;
    }
    return super.visitSimpleIdentifier(node);
  }

  @override
  Object visitTypeName(TypeName node) {
    // Note: do not visit children from this node, the child SimpleIdentifier in TypeName
    // (i.e. "String") does not have a static type defined.
    if (node.type == null) {
      _unresolvedTypes.add(node);
    } else {
      _resolvedTypeCount++;
    }
    return null;
  }

  String _getFileName(AstNode node) {
    // TODO (jwren) there are two copies of this method, one here and one in ResolutionVerifier,
    // they should be resolved into a single method
    if (node != null) {
      AstNode root = node.root;
      if (root is CompilationUnit) {
        CompilationUnit rootCU = root;
        if (rootCU.element != null) {
          return rootCU.element.source.fullName;
        } else {
          return "<unknown file- CompilationUnit.getElement() returned null>";
        }
      } else {
        return "<unknown file- CompilationUnit.getRoot() is not a CompilationUnit>";
      }
    }
    return "<unknown file- ASTNode is null>";
  }
}

/**
 * The class `StrictModeTest` contains tests to ensure that the correct errors and warnings
 * are reported when the analysis engine is run in strict mode.
 */
class StrictModeTest extends ResolverTestCase {
  void fail_for() {
    Source source = addSource(EngineTestCase.createSource([
        "int f(List<int> list) {",
        "  num sum = 0;",
        "  for (num i = 0; i < list.length; i++) {",
        "    sum += list[i];",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [StaticTypeWarningCode.UNDEFINED_OPERATOR]);
  }

  @override
  void setUp() {
    AnalysisOptionsImpl options = new AnalysisOptionsImpl();
    options.hint = false;
    resetWithOptions(options);
  }

  void test_assert_is() {
    Source source = addSource(EngineTestCase.createSource([
        "int f(num n) {",
        "  assert (n is int);",
        "  return n & 0x0F;",
        "}"]));
    resolve(source);
    assertErrors(source, [StaticTypeWarningCode.UNDEFINED_OPERATOR]);
  }

  void test_conditional_and_is() {
    Source source = addSource(EngineTestCase.createSource([
        "int f(num n) {",
        "  return (n is int && n > 0) ? n & 0x0F : 0;",
        "}"]));
    resolve(source);
    assertNoErrors(source);
  }

  void test_conditional_is() {
    Source source = addSource(EngineTestCase.createSource([
        "int f(num n) {",
        "  return (n is int) ? n & 0x0F : 0;",
        "}"]));
    resolve(source);
    assertNoErrors(source);
  }

  void test_conditional_isNot() {
    Source source = addSource(EngineTestCase.createSource([
        "int f(num n) {",
        "  return (n is! int) ? 0 : n & 0x0F;",
        "}"]));
    resolve(source);
    assertErrors(source, [StaticTypeWarningCode.UNDEFINED_OPERATOR]);
  }

  void test_conditional_or_is() {
    Source source = addSource(EngineTestCase.createSource([
        "int f(num n) {",
        "  return (n is! int || n < 0) ? 0 : n & 0x0F;",
        "}"]));
    resolve(source);
    assertErrors(source, [StaticTypeWarningCode.UNDEFINED_OPERATOR]);
  }

  void test_forEach() {
    Source source = addSource(EngineTestCase.createSource([
        "int f(List<int> list) {",
        "  num sum = 0;",
        "  for (num n in list) {",
        "    sum += n & 0x0F;",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [StaticTypeWarningCode.UNDEFINED_OPERATOR]);
  }

  void test_if_and_is() {
    Source source = addSource(EngineTestCase.createSource([
        "int f(num n) {",
        "  if (n is int && n > 0) {",
        "    return n & 0x0F;",
        "  }",
        "  return 0;",
        "}"]));
    resolve(source);
    assertNoErrors(source);
  }

  void test_if_is() {
    Source source = addSource(EngineTestCase.createSource([
        "int f(num n) {",
        "  if (n is int) {",
        "    return n & 0x0F;",
        "  }",
        "  return 0;",
        "}"]));
    resolve(source);
    assertNoErrors(source);
  }

  void test_if_isNot() {
    Source source = addSource(EngineTestCase.createSource([
        "int f(num n) {",
        "  if (n is! int) {",
        "    return 0;",
        "  } else {",
        "    return n & 0x0F;",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [StaticTypeWarningCode.UNDEFINED_OPERATOR]);
  }

  void test_if_isNot_abrupt() {
    Source source = addSource(EngineTestCase.createSource([
        "int f(num n) {",
        "  if (n is! int) {",
        "    return 0;",
        "  }",
        "  return n & 0x0F;",
        "}"]));
    resolve(source);
    assertErrors(source, [StaticTypeWarningCode.UNDEFINED_OPERATOR]);
  }

  void test_if_or_is() {
    Source source = addSource(EngineTestCase.createSource([
        "int f(num n) {",
        "  if (n is! int || n < 0) {",
        "    return 0;",
        "  } else {",
        "    return n & 0x0F;",
        "  }",
        "}"]));
    resolve(source);
    assertErrors(source, [StaticTypeWarningCode.UNDEFINED_OPERATOR]);
  }

  void test_localVar() {
    Source source = addSource(EngineTestCase.createSource(["int f() {", "  num n = 1234;", "  return n & 0x0F;", "}"]));
    resolve(source);
    assertErrors(source, [StaticTypeWarningCode.UNDEFINED_OPERATOR]);
  }
}

class SubtypeManagerTest extends EngineTestCase {
  /**
   * The inheritance manager being tested.
   */
  SubtypeManager _subtypeManager;

  /**
   * The compilation unit element containing all of the types setup in each test.
   */
  CompilationUnitElementImpl _definingCompilationUnit;

  void test_computeAllSubtypes_infiniteLoop() {
    //
    // class A extends B
    // class B extends A
    //
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    ClassElementImpl classB = ElementFactory.classElement("B", classA.type, []);
    classA.supertype = classB.type;
    _definingCompilationUnit.types = <ClassElement> [classA, classB];
    HashSet<ClassElement> subtypesOfA = _subtypeManager.computeAllSubtypes(classA);
    List<ClassElement> arraySubtypesOfA = new List.from(subtypesOfA);
    EngineTestCase.assertSizeOfSet(2, subtypesOfA);
    EngineTestCase.assertContains(arraySubtypesOfA, [classA, classB]);
  }

  void test_computeAllSubtypes_manyRecursiveSubtypes() {
    //
    // class A
    // class B extends A
    // class C extends B
    // class D extends B
    // class E extends B
    //
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    ClassElementImpl classB = ElementFactory.classElement("B", classA.type, []);
    ClassElementImpl classC = ElementFactory.classElement("C", classB.type, []);
    ClassElementImpl classD = ElementFactory.classElement("D", classB.type, []);
    ClassElementImpl classE = ElementFactory.classElement("E", classB.type, []);
    _definingCompilationUnit.types = <ClassElement> [classA, classB, classC, classD, classE];
    HashSet<ClassElement> subtypesOfA = _subtypeManager.computeAllSubtypes(classA);
    List<ClassElement> arraySubtypesOfA = new List.from(subtypesOfA);
    HashSet<ClassElement> subtypesOfB = _subtypeManager.computeAllSubtypes(classB);
    List<ClassElement> arraySubtypesOfB = new List.from(subtypesOfB);
    EngineTestCase.assertSizeOfSet(4, subtypesOfA);
    EngineTestCase.assertContains(arraySubtypesOfA, [classB, classC, classD, classE]);
    EngineTestCase.assertSizeOfSet(3, subtypesOfB);
    EngineTestCase.assertContains(arraySubtypesOfB, [classC, classD, classE]);
  }

  void test_computeAllSubtypes_noSubtypes() {
    //
    // class A
    //
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    _definingCompilationUnit.types = <ClassElement> [classA];
    HashSet<ClassElement> subtypesOfA = _subtypeManager.computeAllSubtypes(classA);
    EngineTestCase.assertSizeOfSet(0, subtypesOfA);
  }

  void test_computeAllSubtypes_oneSubtype() {
    //
    // class A
    // class B extends A
    //
    ClassElementImpl classA = ElementFactory.classElement2("A", []);
    ClassElementImpl classB = ElementFactory.classElement("B", classA.type, []);
    _definingCompilationUnit.types = <ClassElement> [classA, classB];
    HashSet<ClassElement> subtypesOfA = _subtypeManager.computeAllSubtypes(classA);
    List<ClassElement> arraySubtypesOfA = new List.from(subtypesOfA);
    EngineTestCase.assertSizeOfSet(1, subtypesOfA);
    EngineTestCase.assertContains(arraySubtypesOfA, [classB]);
  }

  @override
  void setUp() {
    super.setUp();
    AnalysisContextImpl context = AnalysisContextFactory.contextWithCore();
    FileBasedSource source = new FileBasedSource.con1(FileUtilities2.createFile("/test.dart"));
    _definingCompilationUnit = new CompilationUnitElementImpl("test.dart");
    _definingCompilationUnit.source = source;
    LibraryElementImpl definingLibrary = ElementFactory.library(context, "test");
    definingLibrary.definingCompilationUnit = _definingCompilationUnit;
    _subtypeManager = new SubtypeManager();
  }
}

/**
 * Instances of the class `TestTypeProvider` implement a type provider that can be used by
 * tests without creating the element model for the core library.
 */
class TestTypeProvider implements TypeProvider {
  /**
   * The type representing the built-in type 'bool'.
   */
  InterfaceType _boolType;

  /**
   * The type representing the type 'bottom'.
   */
  DartType _bottomType;

  /**
   * The type representing the built-in type 'double'.
   */
  InterfaceType _doubleType;

  /**
   * The type representing the built-in type 'deprecated'.
   */
  InterfaceType _deprecatedType;

  /**
   * The type representing the built-in type 'dynamic'.
   */
  DartType _dynamicType;

  /**
   * The type representing the built-in type 'Function'.
   */
  InterfaceType _functionType;

  /**
   * The type representing the built-in type 'int'.
   */
  InterfaceType _intType;

  /**
   * The type representing the built-in type 'Iterable'.
   */
  InterfaceType _iterableType;

  /**
   * The type representing the built-in type 'Iterator'.
   */
  InterfaceType _iteratorType;

  /**
   * The type representing the built-in type 'List'.
   */
  InterfaceType _listType;

  /**
   * The type representing the built-in type 'Map'.
   */
  InterfaceType _mapType;

  /**
   * The type representing the built-in type 'Null'.
   */
  InterfaceType _nullType;

  /**
   * The type representing the built-in type 'num'.
   */
  InterfaceType _numType;

  /**
   * The type representing the built-in type 'Object'.
   */
  InterfaceType _objectType;

  /**
   * The type representing the built-in type 'StackTrace'.
   */
  InterfaceType _stackTraceType;

  /**
   * The type representing the built-in type 'String'.
   */
  InterfaceType _stringType;

  /**
   * The type representing the built-in type 'Symbol'.
   */
  InterfaceType _symbolType;

  /**
   * The type representing the built-in type 'Type'.
   */
  InterfaceType _typeType;

  /**
   * The type representing typenames that can't be resolved.
   */
  DartType _undefinedType;

  @override
  InterfaceType get boolType {
    if (_boolType == null) {
      ClassElementImpl boolElement = ElementFactory.classElement2("bool", []);
      _boolType = boolElement.type;
      ConstructorElementImpl fromEnvironment = ElementFactory.constructorElement(boolElement, "fromEnvironment", true, []);
      fromEnvironment.parameters = <ParameterElement> [
          ElementFactory.requiredParameter2("name", stringType),
          ElementFactory.namedParameter2("defaultValue", _boolType)];
      fromEnvironment.factory = true;
      boolElement.constructors = <ConstructorElement> [fromEnvironment];
    }
    return _boolType;
  }

  @override
  DartType get bottomType {
    if (_bottomType == null) {
      _bottomType = BottomTypeImpl.instance;
    }
    return _bottomType;
  }

  @override
  InterfaceType get deprecatedType {
    if (_deprecatedType == null) {
      ClassElementImpl deprecatedElement = ElementFactory.classElement2("Deprecated", []);
      deprecatedElement.constructors = <ConstructorElement> [ElementFactory.constructorElement(deprecatedElement, null, true, [stringType])];
      _deprecatedType = deprecatedElement.type;
    }
    return _deprecatedType;
  }

  @override
  InterfaceType get doubleType {
    if (_doubleType == null) {
      _initializeNumericTypes();
    }
    return _doubleType;
  }

  @override
  DartType get dynamicType {
    if (_dynamicType == null) {
      _dynamicType = DynamicTypeImpl.instance;
    }
    return _dynamicType;
  }

  @override
  InterfaceType get functionType {
    if (_functionType == null) {
      _functionType = ElementFactory.classElement2("Function", []).type;
    }
    return _functionType;
  }

  @override
  InterfaceType get intType {
    if (_intType == null) {
      _initializeNumericTypes();
    }
    return _intType;
  }

  InterfaceType get iterableType {
    if (_iterableType == null) {
      ClassElementImpl iterableElement = ElementFactory.classElement2("Iterable", ["E"]);
      _iterableType = iterableElement.type;
      DartType eType = iterableElement.typeParameters[0].type;
      iterableElement.accessors = <PropertyAccessorElement> [
          ElementFactory.getterElement("iterator", false, iteratorType.substitute4(<DartType> [eType])),
          ElementFactory.getterElement("last", false, eType)];
      _propagateTypeArguments(iterableElement);
    }
    return _iterableType;
  }

  InterfaceType get iteratorType {
    if (_iteratorType == null) {
      ClassElementImpl iteratorElement = ElementFactory.classElement2("Iterator", ["E"]);
      _iteratorType = iteratorElement.type;
      DartType eType = iteratorElement.typeParameters[0].type;
      iteratorElement.accessors = <PropertyAccessorElement> [ElementFactory.getterElement("current", false, eType)];
      _propagateTypeArguments(iteratorElement);
    }
    return _iteratorType;
  }

  @override
  InterfaceType get listType {
    if (_listType == null) {
      ClassElementImpl listElement = ElementFactory.classElement2("List", ["E"]);
      listElement.constructors = <ConstructorElement> [ElementFactory.constructorElement2(listElement, null, [])];
      _listType = listElement.type;
      DartType eType = listElement.typeParameters[0].type;
      InterfaceType iterableType = this.iterableType.substitute4(<DartType> [eType]);
      listElement.interfaces = <InterfaceType> [iterableType];
      listElement.accessors = <PropertyAccessorElement> [ElementFactory.getterElement("length", false, intType)];
      listElement.methods = <MethodElement> [
          ElementFactory.methodElement("[]", eType, [intType]),
          ElementFactory.methodElement("[]=", VoidTypeImpl.instance, [intType, eType]),
          ElementFactory.methodElement("add", VoidTypeImpl.instance, [eType])];
      _propagateTypeArguments(listElement);
    }
    return _listType;
  }

  @override
  InterfaceType get mapType {
    if (_mapType == null) {
      ClassElementImpl mapElement = ElementFactory.classElement2("Map", ["K", "V"]);
      _mapType = mapElement.type;
      DartType kType = mapElement.typeParameters[0].type;
      DartType vType = mapElement.typeParameters[1].type;
      mapElement.accessors = <PropertyAccessorElement> [ElementFactory.getterElement("length", false, intType)];
      mapElement.methods = <MethodElement> [
          ElementFactory.methodElement("[]", vType, [objectType]),
          ElementFactory.methodElement("[]=", VoidTypeImpl.instance, [kType, vType])];
      _propagateTypeArguments(mapElement);
    }
    return _mapType;
  }

  @override
  InterfaceType get nullType {
    if (_nullType == null) {
      _nullType = ElementFactory.classElement2("Null", []).type;
    }
    return _nullType;
  }

  @override
  InterfaceType get numType {
    if (_numType == null) {
      _initializeNumericTypes();
    }
    return _numType;
  }

  @override
  InterfaceType get objectType {
    if (_objectType == null) {
      ClassElementImpl objectElement = ElementFactory.object;
      _objectType = objectElement.type;
      objectElement.constructors = <ConstructorElement> [ElementFactory.constructorElement2(objectElement, null, [])];
      objectElement.methods = <MethodElement> [
          ElementFactory.methodElement("toString", stringType, []),
          ElementFactory.methodElement("==", boolType, [_objectType]),
          ElementFactory.methodElement("noSuchMethod", dynamicType, [dynamicType])];
      objectElement.accessors = <PropertyAccessorElement> [
          ElementFactory.getterElement("hashCode", false, intType),
          ElementFactory.getterElement("runtimeType", false, typeType)];
    }
    return _objectType;
  }

  @override
  InterfaceType get stackTraceType {
    if (_stackTraceType == null) {
      _stackTraceType = ElementFactory.classElement2("StackTrace", []).type;
    }
    return _stackTraceType;
  }

  @override
  InterfaceType get stringType {
    if (_stringType == null) {
      _stringType = ElementFactory.classElement2("String", []).type;
      ClassElementImpl stringElement = _stringType.element as ClassElementImpl;
      stringElement.accessors = <PropertyAccessorElement> [
          ElementFactory.getterElement("isEmpty", false, boolType),
          ElementFactory.getterElement("length", false, intType),
          ElementFactory.getterElement("codeUnits", false, listType.substitute4(<DartType> [intType]))];
      stringElement.methods = <MethodElement> [
          ElementFactory.methodElement("+", _stringType, [_stringType]),
          ElementFactory.methodElement("toLowerCase", _stringType, []),
          ElementFactory.methodElement("toUpperCase", _stringType, [])];
      ConstructorElementImpl fromEnvironment = ElementFactory.constructorElement(stringElement, "fromEnvironment", true, []);
      fromEnvironment.parameters = <ParameterElement> [
          ElementFactory.requiredParameter2("name", stringType),
          ElementFactory.namedParameter2("defaultValue", _stringType)];
      fromEnvironment.factory = true;
      stringElement.constructors = <ConstructorElement> [fromEnvironment];
    }
    return _stringType;
  }

  @override
  InterfaceType get symbolType {
    if (_symbolType == null) {
      ClassElementImpl symbolClass = ElementFactory.classElement2("Symbol", []);
      ConstructorElementImpl constructor = ElementFactory.constructorElement(symbolClass, null, true, [stringType]);
      constructor.factory = true;
      symbolClass.constructors = <ConstructorElement> [constructor];
      _symbolType = symbolClass.type;
    }
    return _symbolType;
  }

  @override
  InterfaceType get typeType {
    if (_typeType == null) {
      _typeType = ElementFactory.classElement2("Type", []).type;
    }
    return _typeType;
  }

  @override
  DartType get undefinedType {
    if (_undefinedType == null) {
      _undefinedType = UndefinedTypeImpl.instance;
    }
    return _undefinedType;
  }

  /**
   * Initialize the numeric types. They are created as a group so that we can (a) create the right
   * hierarchy and (b) add members to them.
   */
  void _initializeNumericTypes() {
    //
    // Create the type hierarchy.
    //
    ClassElementImpl numElement = ElementFactory.classElement2("num", []);
    _numType = numElement.type;
    ClassElementImpl intElement = ElementFactory.classElement("int", _numType, []);
    _intType = intElement.type;
    ClassElementImpl doubleElement = ElementFactory.classElement("double", _numType, []);
    _doubleType = doubleElement.type;
    //
    // Force the referenced types to be cached.
    //
    objectType;
    boolType;
    stringType;
    //
    // Add the methods.
    //
    numElement.methods = <MethodElement> [
        ElementFactory.methodElement("+", _numType, [_numType]),
        ElementFactory.methodElement("-", _numType, [_numType]),
        ElementFactory.methodElement("*", _numType, [_numType]),
        ElementFactory.methodElement("%", _numType, [_numType]),
        ElementFactory.methodElement("/", _doubleType, [_numType]),
        ElementFactory.methodElement("~/", _numType, [_numType]),
        ElementFactory.methodElement("-", _numType, []),
        ElementFactory.methodElement("remainder", _numType, [_numType]),
        ElementFactory.methodElement("<", _boolType, [_numType]),
        ElementFactory.methodElement("<=", _boolType, [_numType]),
        ElementFactory.methodElement(">", _boolType, [_numType]),
        ElementFactory.methodElement(">=", _boolType, [_numType]),
        ElementFactory.methodElement("==", _boolType, [_objectType]),
        ElementFactory.methodElement("isNaN", _boolType, []),
        ElementFactory.methodElement("isNegative", _boolType, []),
        ElementFactory.methodElement("isInfinite", _boolType, []),
        ElementFactory.methodElement("abs", _numType, []),
        ElementFactory.methodElement("floor", _numType, []),
        ElementFactory.methodElement("ceil", _numType, []),
        ElementFactory.methodElement("round", _numType, []),
        ElementFactory.methodElement("truncate", _numType, []),
        ElementFactory.methodElement("toInt", _intType, []),
        ElementFactory.methodElement("toDouble", _doubleType, []),
        ElementFactory.methodElement("toStringAsFixed", _stringType, [_intType]),
        ElementFactory.methodElement("toStringAsExponential", _stringType, [_intType]),
        ElementFactory.methodElement("toStringAsPrecision", _stringType, [_intType]),
        ElementFactory.methodElement("toRadixString", _stringType, [_intType])];
    intElement.methods = <MethodElement> [
        ElementFactory.methodElement("&", _intType, [_intType]),
        ElementFactory.methodElement("|", _intType, [_intType]),
        ElementFactory.methodElement("^", _intType, [_intType]),
        ElementFactory.methodElement("~", _intType, []),
        ElementFactory.methodElement("<<", _intType, [_intType]),
        ElementFactory.methodElement(">>", _intType, [_intType]),
        ElementFactory.methodElement("-", _intType, []),
        ElementFactory.methodElement("abs", _intType, []),
        ElementFactory.methodElement("round", _intType, []),
        ElementFactory.methodElement("floor", _intType, []),
        ElementFactory.methodElement("ceil", _intType, []),
        ElementFactory.methodElement("truncate", _intType, []),
        ElementFactory.methodElement("toString", _stringType, [])];
    ConstructorElementImpl fromEnvironment = ElementFactory.constructorElement(intElement, "fromEnvironment", true, []);
    fromEnvironment.parameters = <ParameterElement> [
        ElementFactory.requiredParameter2("name", stringType),
        ElementFactory.namedParameter2("defaultValue", _intType)];
    fromEnvironment.factory = true;
    intElement.constructors = <ConstructorElement> [fromEnvironment];
    List<FieldElement> fields = <FieldElement> [
        ElementFactory.fieldElement("NAN", true, false, true, _doubleType),
        ElementFactory.fieldElement("INFINITY", true, false, true, _doubleType),
        ElementFactory.fieldElement("NEGATIVE_INFINITY", true, false, true, _doubleType),
        ElementFactory.fieldElement("MIN_POSITIVE", true, false, true, _doubleType),
        ElementFactory.fieldElement("MAX_FINITE", true, false, true, _doubleType)];
    doubleElement.fields = fields;
    int fieldCount = fields.length;
    List<PropertyAccessorElement> accessors = new List<PropertyAccessorElement>(fieldCount);
    for (int i = 0; i < fieldCount; i++) {
      accessors[i] = fields[i].getter;
    }
    doubleElement.accessors = accessors;
    doubleElement.methods = <MethodElement> [
        ElementFactory.methodElement("remainder", _doubleType, [_numType]),
        ElementFactory.methodElement("+", _doubleType, [_numType]),
        ElementFactory.methodElement("-", _doubleType, [_numType]),
        ElementFactory.methodElement("*", _doubleType, [_numType]),
        ElementFactory.methodElement("%", _doubleType, [_numType]),
        ElementFactory.methodElement("/", _doubleType, [_numType]),
        ElementFactory.methodElement("~/", _doubleType, [_numType]),
        ElementFactory.methodElement("-", _doubleType, []),
        ElementFactory.methodElement("abs", _doubleType, []),
        ElementFactory.methodElement("round", _doubleType, []),
        ElementFactory.methodElement("floor", _doubleType, []),
        ElementFactory.methodElement("ceil", _doubleType, []),
        ElementFactory.methodElement("truncate", _doubleType, []),
        ElementFactory.methodElement("toString", _stringType, [])];
  }

  /**
   * Given a class element representing a class with type parameters, propagate those type
   * parameters to all of the accessors, methods and constructors defined for the class.
   *
   * @param classElement the element representing the class with type parameters
   */
  void _propagateTypeArguments(ClassElementImpl classElement) {
    List<DartType> typeArguments = TypeParameterTypeImpl.getTypes(classElement.typeParameters);
    for (PropertyAccessorElement accessor in classElement.accessors) {
      FunctionTypeImpl functionType = accessor.type as FunctionTypeImpl;
      functionType.typeArguments = typeArguments;
    }
    for (MethodElement method in classElement.methods) {
      FunctionTypeImpl functionType = method.type as FunctionTypeImpl;
      functionType.typeArguments = typeArguments;
    }
    for (ConstructorElement constructor in classElement.constructors) {
      FunctionTypeImpl functionType = constructor.type as FunctionTypeImpl;
      functionType.typeArguments = typeArguments;
    }
  }
}

class TypeOverrideManagerTest extends EngineTestCase {
  void test_exitScope_noScopes() {
    TypeOverrideManager manager = new TypeOverrideManager();
    try {
      manager.exitScope();
      JUnitTestCase.fail("Expected IllegalStateException");
    } on IllegalStateException catch (exception) {
      // Expected
    }
  }

  void test_exitScope_oneScope() {
    TypeOverrideManager manager = new TypeOverrideManager();
    manager.enterScope();
    manager.exitScope();
    try {
      manager.exitScope();
      JUnitTestCase.fail("Expected IllegalStateException");
    } on IllegalStateException catch (exception) {
      // Expected
    }
  }

  void test_exitScope_twoScopes() {
    TypeOverrideManager manager = new TypeOverrideManager();
    manager.enterScope();
    manager.exitScope();
    manager.enterScope();
    manager.exitScope();
    try {
      manager.exitScope();
      JUnitTestCase.fail("Expected IllegalStateException");
    } on IllegalStateException catch (exception) {
      // Expected
    }
  }

  void test_getType_enclosedOverride() {
    TypeOverrideManager manager = new TypeOverrideManager();
    LocalVariableElementImpl element = ElementFactory.localVariableElement2("v");
    InterfaceType type = ElementFactory.classElement2("C", []).type;
    manager.enterScope();
    manager.setType(element, type);
    manager.enterScope();
    JUnitTestCase.assertSame(type, manager.getType(element));
  }

  void test_getType_immediateOverride() {
    TypeOverrideManager manager = new TypeOverrideManager();
    LocalVariableElementImpl element = ElementFactory.localVariableElement2("v");
    InterfaceType type = ElementFactory.classElement2("C", []).type;
    manager.enterScope();
    manager.setType(element, type);
    JUnitTestCase.assertSame(type, manager.getType(element));
  }

  void test_getType_noOverride() {
    TypeOverrideManager manager = new TypeOverrideManager();
    manager.enterScope();
    JUnitTestCase.assertNull(manager.getType(ElementFactory.localVariableElement2("v")));
  }

  void test_getType_noScope() {
    TypeOverrideManager manager = new TypeOverrideManager();
    JUnitTestCase.assertNull(manager.getType(ElementFactory.localVariableElement2("v")));
  }
}


class TypePropagationTest extends ResolverTestCase {
  void fail_mergePropagatedTypesAtJoinPoint_1() {
    // https://code.google.com/p/dart/issues/detail?id=19929
    _assertTypeOfMarkedExpression(EngineTestCase.createSource([
        "f1(x) {",
        "  var y = [];",
        "  if (x) {",
        "    y = 0;",
        "  } else {",
        "    y = '';",
        "  }",
        "  // Propagated type is [List] here: incorrect.",
        "  // Best we can do is [Object]?",
        "  return y; // marker",
        "}"]), null, typeProvider.dynamicType);
  }

  void fail_mergePropagatedTypesAtJoinPoint_2() {
    // https://code.google.com/p/dart/issues/detail?id=19929
    _assertTypeOfMarkedExpression(EngineTestCase.createSource([
        "f2(x) {",
        "  var y = [];",
        "  if (x) {",
        "    y = 0;",
        "  } else {",
        "  }",
        "  // Propagated type is [List] here: incorrect.",
        "  // Best we can do is [Object]?",
        "  return y; // marker",
        "}"]), null, typeProvider.dynamicType);
  }

  void fail_mergePropagatedTypesAtJoinPoint_3() {
    // https://code.google.com/p/dart/issues/detail?id=19929
    _assertTypeOfMarkedExpression(EngineTestCase.createSource([
        "f4(x) {",
        "  var y = [];",
        "  if (x) {",
        "    y = 0;",
        "  } else {",
        "    y = 1.5;",
        "  }",
        "  // Propagated type is [List] here: incorrect.",
        "  // A correct answer is the least upper bound of [int] and [double],",
        "  // i.e. [num].",
        "  return y; // marker",
        "}"]), null, typeProvider.numType);
  }

  void fail_mergePropagatedTypesAtJoinPoint_5() {
    // https://code.google.com/p/dart/issues/detail?id=19929
    _assertTypeOfMarkedExpression(EngineTestCase.createSource([
        "f6(x,y) {",
        "  var z = [];",
        "  if (x || (z = y) < 0) {",
        "  } else {",
        "    z = 0;",
        "  }",
        "  // Propagated type is [List] here: incorrect.",
        "  // Best we can do is [Object]?",
        "  return z; // marker",
        "}"]), null, typeProvider.dynamicType);
  }

  void fail_mergePropagatedTypesAtJoinPoint_7() {
    // https://code.google.com/p/dart/issues/detail?id=19929
    //
    // In general [continue]s are unsafe for the purposes of [isAbruptTerminationStatement].
    //
    // This is like example 6, but less tricky: the code in the branch that
    // [continue]s is in effect after the [if].
    String code = EngineTestCase.createSource([
        "f() {",
        "  var x = 0;",
        "  var c = false;",
        "  var d = true;",
        "  while (d) {",
        "    if (c) {",
        "      d = false;",
        "    } else {",
        "      x = '';",
        "      c = true;",
        "      continue;",
        "    }",
        "    x; // marker",
        "  }",
        "}"]);
    DartType t = _findMarkedIdentifier(code, "; // marker").propagatedType;
    JUnitTestCase.assertTrue(typeProvider.intType.isSubtypeOf(t));
    JUnitTestCase.assertTrue(typeProvider.stringType.isSubtypeOf(t));
  }

  void fail_mergePropagatedTypesAtJoinPoint_8() {
    // https://code.google.com/p/dart/issues/detail?id=19929
    //
    // In nested loops [breaks]s are unsafe for the purposes of [isAbruptTerminationStatement].
    //
    // This is a combination of 6 and 7: we use an unlabeled [break]
    // like a continue for the outer loop / like a labeled [break] to
    // jump just above the [if].
    String code = EngineTestCase.createSource([
        "f() {",
        "  var x = 0;",
        "  var c = false;",
        "  var d = true;",
        "  while (d) {",
        "    while (d) {",
        "      if (c) {",
        "        d = false;",
        "      } else {",
        "        x = '';",
        "        c = true;",
        "        break;",
        "      }",
        "      x; // marker",
        "    }",
        "  }",
        "}"]);
    DartType t = _findMarkedIdentifier(code, "; // marker").propagatedType;
    JUnitTestCase.assertTrue(typeProvider.intType.isSubtypeOf(t));
    JUnitTestCase.assertTrue(typeProvider.stringType.isSubtypeOf(t));
  }

  void fail_propagatedReturnType_functionExpression() {
    // TODO(scheglov) disabled because we don't resolve function expression
    String code = EngineTestCase.createSource(["main() {", "  var v = (() {return 42;})();", "}"]);
    _assertPropagatedReturnType(code, typeProvider.dynamicType, typeProvider.intType);
  }

  void test_as() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {",
        "  bool get g => true;",
        "}",
        "A f(var p) {",
        "  if ((p as A).g) {",
        "    return p;",
        "  } else {",
        "    return null;",
        "  }",
        "}"]));
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    ClassDeclaration classA = unit.declarations[0] as ClassDeclaration;
    InterfaceType typeA = classA.element.type;
    FunctionDeclaration function = unit.declarations[1] as FunctionDeclaration;
    BlockFunctionBody body = function.functionExpression.body as BlockFunctionBody;
    IfStatement ifStatement = body.block.statements[0] as IfStatement;
    ReturnStatement statement = (ifStatement.thenStatement as Block).statements[0] as ReturnStatement;
    SimpleIdentifier variableName = statement.expression as SimpleIdentifier;
    JUnitTestCase.assertSame(typeA, variableName.propagatedType);
  }

  void test_assert() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "A f(var p) {",
        "  assert (p is A);",
        "  return p;",
        "}"]));
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    ClassDeclaration classA = unit.declarations[0] as ClassDeclaration;
    InterfaceType typeA = classA.element.type;
    FunctionDeclaration function = unit.declarations[1] as FunctionDeclaration;
    BlockFunctionBody body = function.functionExpression.body as BlockFunctionBody;
    ReturnStatement statement = body.block.statements[1] as ReturnStatement;
    SimpleIdentifier variableName = statement.expression as SimpleIdentifier;
    JUnitTestCase.assertSame(typeA, variableName.propagatedType);
  }

  void test_assignment() {
    Source source = addSource(EngineTestCase.createSource(["f() {", "  var v;", "  v = 0;", "  return v;", "}"]));
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    FunctionDeclaration function = unit.declarations[0] as FunctionDeclaration;
    BlockFunctionBody body = function.functionExpression.body as BlockFunctionBody;
    ReturnStatement statement = body.block.statements[2] as ReturnStatement;
    SimpleIdentifier variableName = statement.expression as SimpleIdentifier;
    JUnitTestCase.assertSame(typeProvider.intType, variableName.propagatedType);
  }

  void test_assignment_afterInitializer() {
    Source source = addSource(EngineTestCase.createSource(["f() {", "  var v = 0;", "  v = 1.0;", "  return v;", "}"]));
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    FunctionDeclaration function = unit.declarations[0] as FunctionDeclaration;
    BlockFunctionBody body = function.functionExpression.body as BlockFunctionBody;
    ReturnStatement statement = body.block.statements[2] as ReturnStatement;
    SimpleIdentifier variableName = statement.expression as SimpleIdentifier;
    JUnitTestCase.assertSame(typeProvider.doubleType, variableName.propagatedType);
  }

  void test_assignment_null() {
    String code = EngineTestCase.createSource([
        "main() {",
        "  int v; // declare",
        "  v = null;",
        "  return v; // return",
        "}"]);
    CompilationUnit unit;
    {
      Source source = addSource(code);
      LibraryElement library = resolve(source);
      assertNoErrors(source);
      verify([source]);
      unit = resolveCompilationUnit(source, library);
    }
    {
      SimpleIdentifier identifier = EngineTestCase.findNode(unit, code, "v; // declare", (node) => node is SimpleIdentifier);
      JUnitTestCase.assertSame(typeProvider.intType, identifier.staticType);
      JUnitTestCase.assertSame(null, identifier.propagatedType);
    }
    {
      SimpleIdentifier identifier = EngineTestCase.findNode(unit, code, "v = null;", (node) => node is SimpleIdentifier);
      JUnitTestCase.assertSame(typeProvider.intType, identifier.staticType);
      JUnitTestCase.assertSame(null, identifier.propagatedType);
    }
    {
      SimpleIdentifier identifier = EngineTestCase.findNode(unit, code, "v; // return", (node) => node is SimpleIdentifier);
      JUnitTestCase.assertSame(typeProvider.intType, identifier.staticType);
      JUnitTestCase.assertSame(null, identifier.propagatedType);
    }
  }

  void test_CanvasElement_getContext() {
    String code = EngineTestCase.createSource([
        "import 'dart:html';",
        "main(CanvasElement canvas) {",
        "  var context = canvas.getContext('2d');",
        "}"]);
    Source source = addSource(code);
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    SimpleIdentifier identifier = EngineTestCase.findNode(unit, code, "context", (node) => node is SimpleIdentifier);
    JUnitTestCase.assertEquals("CanvasRenderingContext2D", identifier.propagatedType.name);
  }

  void test_finalPropertyInducingVariable_classMember_instance() {
    addNamedSource("/lib.dart", EngineTestCase.createSource(["class A {", "  final v = 0;", "}"]));
    String code = EngineTestCase.createSource([
        "import 'lib.dart';",
        "f(A a) {",
        "  return a.v; // marker",
        "}"]);
    _assertTypeOfMarkedExpression(code, typeProvider.dynamicType, typeProvider.intType);
  }

  void test_finalPropertyInducingVariable_classMember_instance_inherited() {
    addNamedSource("/lib.dart", EngineTestCase.createSource(["class A {", "  final v = 0;", "}"]));
    String code = EngineTestCase.createSource([
        "import 'lib.dart';",
        "class B extends A {",
        "  m() {",
        "    return v; // marker",
        "  }",
        "}"]);
    _assertTypeOfMarkedExpression(code, typeProvider.dynamicType, typeProvider.intType);
  }

  void test_finalPropertyInducingVariable_classMember_instance_propagatedTarget() {
    addNamedSource("/lib.dart", EngineTestCase.createSource(["class A {", "  final v = 0;", "}"]));
    String code = EngineTestCase.createSource([
        "import 'lib.dart';",
        "f(p) {",
        "  if (p is A) {",
        "    return p.v; // marker",
        "  }",
        "}"]);
    _assertTypeOfMarkedExpression(code, typeProvider.dynamicType, typeProvider.intType);
  }

  void test_finalPropertyInducingVariable_classMember_static() {
    addNamedSource("/lib.dart", EngineTestCase.createSource(["class A {", "  static final V = 0;", "}"]));
    String code = EngineTestCase.createSource([
        "import 'lib.dart';",
        "f() {",
        "  return A.V; // marker",
        "}"]);
    _assertTypeOfMarkedExpression(code, typeProvider.dynamicType, typeProvider.intType);
  }

  void test_finalPropertyInducingVariable_topLevelVaraible_prefixed() {
    addNamedSource("/lib.dart", "final V = 0;");
    String code = EngineTestCase.createSource([
        "import 'lib.dart' as p;",
        "f() {",
        "  var v2 = p.V; // marker prefixed",
        "}"]);
    _assertTypeOfMarkedExpression(code, typeProvider.dynamicType, typeProvider.intType);
  }

  void test_finalPropertyInducingVariable_topLevelVaraible_simple() {
    addNamedSource("/lib.dart", "final V = 0;");
    String code = EngineTestCase.createSource([
        "import 'lib.dart';",
        "f() {",
        "  return V; // marker simple",
        "}"]);
    _assertTypeOfMarkedExpression(code, typeProvider.dynamicType, typeProvider.intType);
  }

  void test_forEach() {
    String code = EngineTestCase.createSource([
        "main() {",
        "  var list = <String> [];",
        "  for (var e in list) {",
        "    e;",
        "  }",
        "}"]);
    Source source = addSource(code);
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    InterfaceType stringType = typeProvider.stringType;
    // in the declaration
    {
      SimpleIdentifier identifier = EngineTestCase.findNode(unit, code, "e in", (node) => node is SimpleIdentifier);
      JUnitTestCase.assertSame(stringType, identifier.propagatedType);
    }
    // in the loop body
    {
      SimpleIdentifier identifier = EngineTestCase.findNode(unit, code, "e;", (node) => node is SimpleIdentifier);
      JUnitTestCase.assertSame(stringType, identifier.propagatedType);
    }
  }

  void test_functionExpression_asInvocationArgument() {
    String code = EngineTestCase.createSource([
        "class MyMap<K, V> {",
        "  forEach(f(K key, V value)) {}",
        "}",
        "f(MyMap<int, String> m) {",
        "  m.forEach((k, v) {",
        "    k;",
        "    v;",
        "  });",
        "}"]);
    Source source = addSource(code);
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    // k
    DartType intType = typeProvider.intType;
    FormalParameter kParameter = EngineTestCase.findNode(unit, code, "k, ", (node) => node is SimpleFormalParameter);
    JUnitTestCase.assertSame(intType, kParameter.identifier.propagatedType);
    SimpleIdentifier kIdentifier = EngineTestCase.findNode(unit, code, "k;", (node) => node is SimpleIdentifier);
    JUnitTestCase.assertSame(intType, kIdentifier.propagatedType);
    JUnitTestCase.assertSame(typeProvider.dynamicType, kIdentifier.staticType);
    // v
    DartType stringType = typeProvider.stringType;
    FormalParameter vParameter = EngineTestCase.findNode(unit, code, "v)", (node) => node is SimpleFormalParameter);
    JUnitTestCase.assertSame(stringType, vParameter.identifier.propagatedType);
    SimpleIdentifier vIdentifier = EngineTestCase.findNode(unit, code, "v;", (node) => node is SimpleIdentifier);
    JUnitTestCase.assertSame(stringType, vIdentifier.propagatedType);
    JUnitTestCase.assertSame(typeProvider.dynamicType, vIdentifier.staticType);
  }

  void test_functionExpression_asInvocationArgument_fromInferredInvocation() {
    String code = EngineTestCase.createSource([
        "class MyMap<K, V> {",
        "  forEach(f(K key, V value)) {}",
        "}",
        "f(MyMap<int, String> m) {",
        "  var m2 = m;",
        "  m2.forEach((k, v) {});",
        "}"]);
    Source source = addSource(code);
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    // k
    DartType intType = typeProvider.intType;
    FormalParameter kParameter = EngineTestCase.findNode(unit, code, "k, ", (node) => node is SimpleFormalParameter);
    JUnitTestCase.assertSame(intType, kParameter.identifier.propagatedType);
    // v
    DartType stringType = typeProvider.stringType;
    FormalParameter vParameter = EngineTestCase.findNode(unit, code, "v)", (node) => node is SimpleFormalParameter);
    JUnitTestCase.assertSame(stringType, vParameter.identifier.propagatedType);
  }

  void test_functionExpression_asInvocationArgument_functionExpressionInvocation() {
    String code = EngineTestCase.createSource([
        "main() {",
        "  (f(String value)) {} ((v) {",
        "    v;",
        "  });",
        "}"]);
    Source source = addSource(code);
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    // v
    DartType dynamicType = typeProvider.dynamicType;
    DartType stringType = typeProvider.stringType;
    FormalParameter vParameter = EngineTestCase.findNode(unit, code, "v)", (node) => node is FormalParameter);
    JUnitTestCase.assertSame(stringType, vParameter.identifier.propagatedType);
    JUnitTestCase.assertSame(dynamicType, vParameter.identifier.staticType);
    SimpleIdentifier vIdentifier = EngineTestCase.findNode(unit, code, "v;", (node) => node is SimpleIdentifier);
    JUnitTestCase.assertSame(stringType, vIdentifier.propagatedType);
    JUnitTestCase.assertSame(dynamicType, vIdentifier.staticType);
  }

  void test_functionExpression_asInvocationArgument_keepIfLessSpecific() {
    String code = EngineTestCase.createSource([
        "class MyList {",
        "  forEach(f(Object value)) {}",
        "}",
        "f(MyList list) {",
        "  list.forEach((int v) {",
        "    v;",
        "  });",
        "}"]);
    Source source = addSource(code);
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    // v
    DartType intType = typeProvider.intType;
    FormalParameter vParameter = EngineTestCase.findNode(unit, code, "v)", (node) => node is SimpleFormalParameter);
    JUnitTestCase.assertSame(null, vParameter.identifier.propagatedType);
    JUnitTestCase.assertSame(intType, vParameter.identifier.staticType);
    SimpleIdentifier vIdentifier = EngineTestCase.findNode(unit, code, "v;", (node) => node is SimpleIdentifier);
    JUnitTestCase.assertSame(intType, vIdentifier.staticType);
    JUnitTestCase.assertSame(null, vIdentifier.propagatedType);
  }

  void test_functionExpression_asInvocationArgument_notSubtypeOfStaticType() {
    String code = EngineTestCase.createSource([
        "class A {",
        "  m(void f(int i)) {}",
        "}",
        "x() {",
        "  A a = new A();",
        "  a.m(() => 0);",
        "}"]);
    Source source = addSource(code);
    LibraryElement library = resolve(source);
    assertErrors(source, [StaticWarningCode.ARGUMENT_TYPE_NOT_ASSIGNABLE]);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    // () => 0
    FunctionExpression functionExpression = EngineTestCase.findNode(unit, code, "() => 0)", (node) => node is FunctionExpression);
    JUnitTestCase.assertSame(0, (functionExpression.staticType as FunctionType).parameters.length);
    JUnitTestCase.assertSame(null, functionExpression.propagatedType);
  }

  void test_functionExpression_asInvocationArgument_replaceIfMoreSpecific() {
    String code = EngineTestCase.createSource([
        "class MyList<E> {",
        "  forEach(f(E value)) {}",
        "}",
        "f(MyList<String> list) {",
        "  list.forEach((Object v) {",
        "    v;",
        "  });",
        "}"]);
    Source source = addSource(code);
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    // v
    DartType stringType = typeProvider.stringType;
    FormalParameter vParameter = EngineTestCase.findNode(unit, code, "v)", (node) => node is SimpleFormalParameter);
    JUnitTestCase.assertSame(stringType, vParameter.identifier.propagatedType);
    JUnitTestCase.assertSame(typeProvider.objectType, vParameter.identifier.staticType);
    SimpleIdentifier vIdentifier = EngineTestCase.findNode(unit, code, "v;", (node) => node is SimpleIdentifier);
    JUnitTestCase.assertSame(stringType, vIdentifier.propagatedType);
  }

  void test_Future_then() {
    String code = EngineTestCase.createSource([
        "import 'dart:async';",
        "main(Future<int> firstFuture) {",
        "  firstFuture.then((p1) {",
        "    return 1.0;",
        "  }).then((p2) {",
        "    return new Future<String>.value('str');",
        "  }).then((p3) {",
        "  });",
        "}"]);
    Source source = addSource(code);
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    // p1
    FormalParameter p1 = EngineTestCase.findNode(unit, code, "p1) {", (node) => node is SimpleFormalParameter);
    JUnitTestCase.assertSame(typeProvider.intType, p1.identifier.propagatedType);
    // p2
    FormalParameter p2 = EngineTestCase.findNode(unit, code, "p2) {", (node) => node is SimpleFormalParameter);
    JUnitTestCase.assertSame(typeProvider.doubleType, p2.identifier.propagatedType);
    // p3
    FormalParameter p3 = EngineTestCase.findNode(unit, code, "p3) {", (node) => node is SimpleFormalParameter);
    JUnitTestCase.assertSame(typeProvider.stringType, p3.identifier.propagatedType);
  }

  void test_initializer() {
    Source source = addSource(EngineTestCase.createSource(["f() {", "  var v = 0;", "  return v;", "}"]));
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    FunctionDeclaration function = unit.declarations[0] as FunctionDeclaration;
    BlockFunctionBody body = function.functionExpression.body as BlockFunctionBody;
    NodeList<Statement> statements = body.block.statements;
    // Type of 'v' in declaration.
    {
      VariableDeclarationStatement statement = statements[0] as VariableDeclarationStatement;
      SimpleIdentifier variableName = statement.variables.variables[0].name;
      JUnitTestCase.assertSame(typeProvider.dynamicType, variableName.staticType);
      JUnitTestCase.assertSame(typeProvider.intType, variableName.propagatedType);
    }
    // Type of 'v' in reference.
    {
      ReturnStatement statement = statements[1] as ReturnStatement;
      SimpleIdentifier variableName = statement.expression as SimpleIdentifier;
      JUnitTestCase.assertSame(typeProvider.intType, variableName.propagatedType);
    }
  }

  void test_initializer_dereference() {
    Source source = addSource(EngineTestCase.createSource(["f() {", "  var v = 'String';", "  v.", "}"]));
    LibraryElement library = resolve(source);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    FunctionDeclaration function = unit.declarations[0] as FunctionDeclaration;
    BlockFunctionBody body = function.functionExpression.body as BlockFunctionBody;
    ExpressionStatement statement = body.block.statements[1] as ExpressionStatement;
    PrefixedIdentifier invocation = statement.expression as PrefixedIdentifier;
    SimpleIdentifier variableName = invocation.prefix;
    JUnitTestCase.assertSame(typeProvider.stringType, variableName.propagatedType);
  }

  void test_initializer_null() {
    String code = EngineTestCase.createSource([
        "main() {",
        "  int v = null;",
        "  return v; // marker",
        "}"]);
    CompilationUnit unit;
    {
      Source source = addSource(code);
      LibraryElement library = resolve(source);
      assertNoErrors(source);
      verify([source]);
      unit = resolveCompilationUnit(source, library);
    }
    {
      SimpleIdentifier identifier = EngineTestCase.findNode(unit, code, "v = null;", (node) => node is SimpleIdentifier);
      JUnitTestCase.assertSame(typeProvider.intType, identifier.staticType);
      JUnitTestCase.assertSame(null, identifier.propagatedType);
    }
    {
      SimpleIdentifier identifier = EngineTestCase.findNode(unit, code, "v; // marker", (node) => node is SimpleIdentifier);
      JUnitTestCase.assertSame(typeProvider.intType, identifier.staticType);
      JUnitTestCase.assertSame(null, identifier.propagatedType);
    }
  }

  void test_is_conditional() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "A f(var p) {",
        "  return (p is A) ? p : null;",
        "}"]));
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    ClassDeclaration classA = unit.declarations[0] as ClassDeclaration;
    InterfaceType typeA = classA.element.type;
    FunctionDeclaration function = unit.declarations[1] as FunctionDeclaration;
    BlockFunctionBody body = function.functionExpression.body as BlockFunctionBody;
    ReturnStatement statement = body.block.statements[0] as ReturnStatement;
    ConditionalExpression conditional = statement.expression as ConditionalExpression;
    SimpleIdentifier variableName = conditional.thenExpression as SimpleIdentifier;
    JUnitTestCase.assertSame(typeA, variableName.propagatedType);
  }

  void test_is_if() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "A f(var p) {",
        "  if (p is A) {",
        "    return p;",
        "  } else {",
        "    return null;",
        "  }",
        "}"]));
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    ClassDeclaration classA = unit.declarations[0] as ClassDeclaration;
    InterfaceType typeA = classA.element.type;
    FunctionDeclaration function = unit.declarations[1] as FunctionDeclaration;
    BlockFunctionBody body = function.functionExpression.body as BlockFunctionBody;
    IfStatement ifStatement = body.block.statements[0] as IfStatement;
    ReturnStatement statement = (ifStatement.thenStatement as Block).statements[0] as ReturnStatement;
    SimpleIdentifier variableName = statement.expression as SimpleIdentifier;
    JUnitTestCase.assertSame(typeA, variableName.propagatedType);
  }

  void test_is_if_lessSpecific() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "A f(A p) {",
        "  if (p is String) {",
        "    return p;",
        "  } else {",
        "    return null;",
        "  }",
        "}"]));
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    //    ClassDeclaration classA = (ClassDeclaration) unit.getDeclarations().get(0);
    //    InterfaceType typeA = classA.getElement().getType();
    FunctionDeclaration function = unit.declarations[1] as FunctionDeclaration;
    BlockFunctionBody body = function.functionExpression.body as BlockFunctionBody;
    IfStatement ifStatement = body.block.statements[0] as IfStatement;
    ReturnStatement statement = (ifStatement.thenStatement as Block).statements[0] as ReturnStatement;
    SimpleIdentifier variableName = statement.expression as SimpleIdentifier;
    JUnitTestCase.assertSame(null, variableName.propagatedType);
  }

  void test_is_if_logicalAnd() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "A f(var p) {",
        "  if (p is A && p != null) {",
        "    return p;",
        "  } else {",
        "    return null;",
        "  }",
        "}"]));
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    ClassDeclaration classA = unit.declarations[0] as ClassDeclaration;
    InterfaceType typeA = classA.element.type;
    FunctionDeclaration function = unit.declarations[1] as FunctionDeclaration;
    BlockFunctionBody body = function.functionExpression.body as BlockFunctionBody;
    IfStatement ifStatement = body.block.statements[0] as IfStatement;
    ReturnStatement statement = (ifStatement.thenStatement as Block).statements[0] as ReturnStatement;
    SimpleIdentifier variableName = statement.expression as SimpleIdentifier;
    JUnitTestCase.assertSame(typeA, variableName.propagatedType);
  }

  void test_is_postConditional() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "A f(var p) {",
        "  A a = (p is A) ? p : throw null;",
        "  return p;",
        "}"]));
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    ClassDeclaration classA = unit.declarations[0] as ClassDeclaration;
    InterfaceType typeA = classA.element.type;
    FunctionDeclaration function = unit.declarations[1] as FunctionDeclaration;
    BlockFunctionBody body = function.functionExpression.body as BlockFunctionBody;
    ReturnStatement statement = body.block.statements[1] as ReturnStatement;
    SimpleIdentifier variableName = statement.expression as SimpleIdentifier;
    JUnitTestCase.assertSame(typeA, variableName.propagatedType);
  }

  void test_is_postIf() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "A f(var p) {",
        "  if (p is A) {",
        "    A a = p;",
        "  } else {",
        "    return null;",
        "  }",
        "  return p;",
        "}"]));
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    ClassDeclaration classA = unit.declarations[0] as ClassDeclaration;
    InterfaceType typeA = classA.element.type;
    FunctionDeclaration function = unit.declarations[1] as FunctionDeclaration;
    BlockFunctionBody body = function.functionExpression.body as BlockFunctionBody;
    ReturnStatement statement = body.block.statements[1] as ReturnStatement;
    SimpleIdentifier variableName = statement.expression as SimpleIdentifier;
    JUnitTestCase.assertSame(typeA, variableName.propagatedType);
  }

  void test_is_subclass() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "class B extends A {",
        "  B m() => this;",
        "}",
        "A f(A p) {",
        "  if (p is B) {",
        "    return p.m();",
        "  }",
        "  return p;",
        "}"]));
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    FunctionDeclaration function = unit.declarations[2] as FunctionDeclaration;
    BlockFunctionBody body = function.functionExpression.body as BlockFunctionBody;
    IfStatement ifStatement = body.block.statements[0] as IfStatement;
    ReturnStatement statement = (ifStatement.thenStatement as Block).statements[0] as ReturnStatement;
    MethodInvocation invocation = statement.expression as MethodInvocation;
    JUnitTestCase.assertNotNull(invocation.methodName.propagatedElement);
  }

  void test_is_while() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "A f(var p) {",
        "  while (p is A) {",
        "    return p;",
        "  }",
        "  return p;",
        "}"]));
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    ClassDeclaration classA = unit.declarations[0] as ClassDeclaration;
    InterfaceType typeA = classA.element.type;
    FunctionDeclaration function = unit.declarations[1] as FunctionDeclaration;
    BlockFunctionBody body = function.functionExpression.body as BlockFunctionBody;
    WhileStatement whileStatement = body.block.statements[0] as WhileStatement;
    ReturnStatement statement = (whileStatement.body as Block).statements[0] as ReturnStatement;
    SimpleIdentifier variableName = statement.expression as SimpleIdentifier;
    JUnitTestCase.assertSame(typeA, variableName.propagatedType);
  }

  void test_isNot_conditional() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "A f(var p) {",
        "  return (p is! A) ? null : p;",
        "}"]));
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    ClassDeclaration classA = unit.declarations[0] as ClassDeclaration;
    InterfaceType typeA = classA.element.type;
    FunctionDeclaration function = unit.declarations[1] as FunctionDeclaration;
    BlockFunctionBody body = function.functionExpression.body as BlockFunctionBody;
    ReturnStatement statement = body.block.statements[0] as ReturnStatement;
    ConditionalExpression conditional = statement.expression as ConditionalExpression;
    SimpleIdentifier variableName = conditional.elseExpression as SimpleIdentifier;
    JUnitTestCase.assertSame(typeA, variableName.propagatedType);
  }

  void test_isNot_if() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "A f(var p) {",
        "  if (p is! A) {",
        "    return null;",
        "  } else {",
        "    return p;",
        "  }",
        "}"]));
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    ClassDeclaration classA = unit.declarations[0] as ClassDeclaration;
    InterfaceType typeA = classA.element.type;
    FunctionDeclaration function = unit.declarations[1] as FunctionDeclaration;
    BlockFunctionBody body = function.functionExpression.body as BlockFunctionBody;
    IfStatement ifStatement = body.block.statements[0] as IfStatement;
    ReturnStatement statement = (ifStatement.elseStatement as Block).statements[0] as ReturnStatement;
    SimpleIdentifier variableName = statement.expression as SimpleIdentifier;
    JUnitTestCase.assertSame(typeA, variableName.propagatedType);
  }

  void test_isNot_if_logicalOr() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "A f(var p) {",
        "  if (p is! A || null == p) {",
        "    return null;",
        "  } else {",
        "    return p;",
        "  }",
        "}"]));
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    ClassDeclaration classA = unit.declarations[0] as ClassDeclaration;
    InterfaceType typeA = classA.element.type;
    FunctionDeclaration function = unit.declarations[1] as FunctionDeclaration;
    BlockFunctionBody body = function.functionExpression.body as BlockFunctionBody;
    IfStatement ifStatement = body.block.statements[0] as IfStatement;
    ReturnStatement statement = (ifStatement.elseStatement as Block).statements[0] as ReturnStatement;
    SimpleIdentifier variableName = statement.expression as SimpleIdentifier;
    JUnitTestCase.assertSame(typeA, variableName.propagatedType);
  }

  void test_isNot_postConditional() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "A f(var p) {",
        "  A a = (p is! A) ? throw null : p;",
        "  return p;",
        "}"]));
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    ClassDeclaration classA = unit.declarations[0] as ClassDeclaration;
    InterfaceType typeA = classA.element.type;
    FunctionDeclaration function = unit.declarations[1] as FunctionDeclaration;
    BlockFunctionBody body = function.functionExpression.body as BlockFunctionBody;
    ReturnStatement statement = body.block.statements[1] as ReturnStatement;
    SimpleIdentifier variableName = statement.expression as SimpleIdentifier;
    JUnitTestCase.assertSame(typeA, variableName.propagatedType);
  }

  void test_isNot_postIf() {
    Source source = addSource(EngineTestCase.createSource([
        "class A {}",
        "A f(var p) {",
        "  if (p is! A) {",
        "    return null;",
        "  }",
        "  return p;",
        "}"]));
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    ClassDeclaration classA = unit.declarations[0] as ClassDeclaration;
    InterfaceType typeA = classA.element.type;
    FunctionDeclaration function = unit.declarations[1] as FunctionDeclaration;
    BlockFunctionBody body = function.functionExpression.body as BlockFunctionBody;
    ReturnStatement statement = body.block.statements[1] as ReturnStatement;
    SimpleIdentifier variableName = statement.expression as SimpleIdentifier;
    JUnitTestCase.assertSame(typeA, variableName.propagatedType);
  }

  void test_issue20904BuggyTypePromotionAtIfJoin_2() {
    // https://code.google.com/p/dart/issues/detail?id=20904
    enableUnionTypes(false);
    String code = EngineTestCase.createSource([
        "f(var message) {",
        "  if (message is Function) {",
        "    message = '';",
        "  }",
        "  message; // marker",
        "}"]);
    DartType t = _findMarkedIdentifier(code, "; // marker").propagatedType;
    JUnitTestCase.assertFalse(typeProvider.stringType == t);
    JUnitTestCase.assertFalse(typeProvider.functionType == t);
  }

  void test_issue20904BuggyTypePromotionAtIfJoin_5() {
    // https://code.google.com/p/dart/issues/detail?id=20904
    //
    // This is not an example of the 20904 bug, but rather,
    // an example of something that one obvious fix changes inadvertently: we
    // want to avoid using type information from is-checks when it
    // loses precision. I can't see how to get a bad hint this way, since
    // it seems the propagated type is not used to generate hints when a
    // more precise type would cause no hint. For example, for code like the
    // following, when the propagated type of [x] is [A] -- as happens for the
    // fix these tests aim to warn against -- there is no warning for
    // calling a method defined on [B] but not [A] (there aren't any, but pretend),
    // but there is for calling a method not defined on either.
    // By not overriding the propagated type via an is-check that loses
    // precision, we get more precise completion under an is-check. However,
    // I can only imagine strange code would make use of this feature.
    //
    // Here the is-check improves precision, so we use it.
    String code = EngineTestCase.createSource([
        "class A {}",
        "class B extends A {}",
        "f() {",
        "  var a = new A();",
        "  var b = new B();",
        "  b; // B",
        "  if (a is B) {",
        "    return a; // marker",
        "  }",
        "}"]);
    DartType tB = _findMarkedIdentifier(code, "; // B").propagatedType;
    _assertTypeOfMarkedExpression(code, null, tB);
  }

  void test_issue20904BuggyTypePromotionAtIfJoin_6() {
    // https://code.google.com/p/dart/issues/detail?id=20904
    //
    // The other half of the *_5() test.
    //
    // Here the is-check loses precision, so we don't use it.
    String code = EngineTestCase.createSource([
        "class A {}",
        "class B extends A {}",
        "f() {",
        "  var b = new B();",
        "  b; // B",
        "  if (b is A) {",
        "    return b; // marker",
        "  }",
        "}"]);
    DartType tB = _findMarkedIdentifier(code, "; // B").propagatedType;
    _assertTypeOfMarkedExpression(code, null, tB);
  }

  void test_listLiteral_different() {
    Source source = addSource(EngineTestCase.createSource(["f() {", "  var v = [0, '1', 2];", "  return v[2];", "}"]));
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    FunctionDeclaration function = unit.declarations[0] as FunctionDeclaration;
    BlockFunctionBody body = function.functionExpression.body as BlockFunctionBody;
    ReturnStatement statement = body.block.statements[1] as ReturnStatement;
    IndexExpression indexExpression = statement.expression as IndexExpression;
    JUnitTestCase.assertNull(indexExpression.propagatedType);
  }

  void test_listLiteral_same() {
    Source source = addSource(EngineTestCase.createSource(["f() {", "  var v = [0, 1, 2];", "  return v[2];", "}"]));
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    FunctionDeclaration function = unit.declarations[0] as FunctionDeclaration;
    BlockFunctionBody body = function.functionExpression.body as BlockFunctionBody;
    ReturnStatement statement = body.block.statements[1] as ReturnStatement;
    IndexExpression indexExpression = statement.expression as IndexExpression;
    JUnitTestCase.assertNull(indexExpression.propagatedType);
    Expression v = indexExpression.target;
    InterfaceType propagatedType = v.propagatedType as InterfaceType;
    JUnitTestCase.assertSame(typeProvider.listType.element, propagatedType.element);
    List<DartType> typeArguments = propagatedType.typeArguments;
    EngineTestCase.assertLength(1, typeArguments);
    JUnitTestCase.assertSame(typeProvider.dynamicType, typeArguments[0]);
  }

  void test_mapLiteral_different() {
    Source source = addSource(EngineTestCase.createSource([
        "f() {",
        "  var v = {'0' : 0, 1 : '1', '2' : 2};",
        "  return v;",
        "}"]));
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    FunctionDeclaration function = unit.declarations[0] as FunctionDeclaration;
    BlockFunctionBody body = function.functionExpression.body as BlockFunctionBody;
    ReturnStatement statement = body.block.statements[1] as ReturnStatement;
    SimpleIdentifier identifier = statement.expression as SimpleIdentifier;
    InterfaceType propagatedType = identifier.propagatedType as InterfaceType;
    JUnitTestCase.assertSame(typeProvider.mapType.element, propagatedType.element);
    List<DartType> typeArguments = propagatedType.typeArguments;
    EngineTestCase.assertLength(2, typeArguments);
    JUnitTestCase.assertSame(typeProvider.dynamicType, typeArguments[0]);
    JUnitTestCase.assertSame(typeProvider.dynamicType, typeArguments[1]);
  }

  void test_mapLiteral_same() {
    Source source = addSource(EngineTestCase.createSource([
        "f() {",
        "  var v = {'a' : 0, 'b' : 1, 'c' : 2};",
        "  return v;",
        "}"]));
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    FunctionDeclaration function = unit.declarations[0] as FunctionDeclaration;
    BlockFunctionBody body = function.functionExpression.body as BlockFunctionBody;
    ReturnStatement statement = body.block.statements[1] as ReturnStatement;
    SimpleIdentifier identifier = statement.expression as SimpleIdentifier;
    InterfaceType propagatedType = identifier.propagatedType as InterfaceType;
    JUnitTestCase.assertSame(typeProvider.mapType.element, propagatedType.element);
    List<DartType> typeArguments = propagatedType.typeArguments;
    EngineTestCase.assertLength(2, typeArguments);
    JUnitTestCase.assertSame(typeProvider.dynamicType, typeArguments[0]);
    JUnitTestCase.assertSame(typeProvider.dynamicType, typeArguments[1]);
  }

  void test_mergePropagatedTypesAtJoinPoint_4() {
    // https://code.google.com/p/dart/issues/detail?id=19929
    _assertTypeOfMarkedExpression(EngineTestCase.createSource([
        "f5(x) {",
        "  var y = [];",
        "  if (x) {",
        "    y = 0;",
        "  } else {",
        "    return y;",
        "  }",
        "  // Propagated type is [int] here: correct.",
        "  return y; // marker",
        "}"]), null, typeProvider.intType);
  }

  void test_mergePropagatedTypesAtJoinPoint_6() {
    // https://code.google.com/p/dart/issues/detail?id=19929
    //
    // Labeled [break]s are unsafe for the purposes of [isAbruptTerminationStatement].
    //
    // This is tricky: the [break] jumps back above the [if], making
    // it into a loop of sorts. The [if] type-propagation code assumes
    // that [break] does not introduce a loop.
    enableUnionTypes(false);
    String code = EngineTestCase.createSource([
        "f() {",
        "  var x = 0;",
        "  var c = false;",
        "  L: ",
        "  if (c) {",
        "  } else {",
        "    x = '';",
        "    c = true;",
        "    break L;",
        "  }",
        "  x; // marker",
        "}"]);
    DartType t = _findMarkedIdentifier(code, "; // marker").propagatedType;
    JUnitTestCase.assertTrue(typeProvider.intType.isSubtypeOf(t));
    JUnitTestCase.assertTrue(typeProvider.stringType.isSubtypeOf(t));
  }

  void test_objectMethodOnDynamicExpression_doubleEquals() {
    // https://code.google.com/p/dart/issues/detail?id=20342
    //
    // This was not actually part of Issue 20342, since the spec specifies a
    // static type of [bool] for [==] comparison and the implementation
    // was already consistent with the spec there. But, it's another
    // [Object] method, so it's included here.
    _assertTypeOfMarkedExpression(EngineTestCase.createSource([
        "f1(x) {",
        "  var v = (x == x);",
        "  return v; // marker",
        "}"]), null, typeProvider.boolType);
  }

  void test_objectMethodOnDynamicExpression_hashCode() {
    // https://code.google.com/p/dart/issues/detail?id=20342
    _assertTypeOfMarkedExpression(EngineTestCase.createSource([
        "f1(x) {",
        "  var v = x.hashCode;",
        "  return v; // marker",
        "}"]), null, typeProvider.intType);
  }

  void test_objectMethodOnDynamicExpression_runtimeType() {
    // https://code.google.com/p/dart/issues/detail?id=20342
    _assertTypeOfMarkedExpression(EngineTestCase.createSource([
        "f1(x) {",
        "  var v = x.runtimeType;",
        "  return v; // marker",
        "}"]), null, typeProvider.typeType);
  }

  void test_objectMethodOnDynamicExpression_toString() {
    // https://code.google.com/p/dart/issues/detail?id=20342
    _assertTypeOfMarkedExpression(EngineTestCase.createSource([
        "f1(x) {",
        "  var v = x.toString();",
        "  return v; // marker",
        "}"]), null, typeProvider.stringType);
  }

  void test_propagatedReturnType_function_hasReturnType_returnsNull() {
    String code = EngineTestCase.createSource(["String f() => null;", "main() {", "  var v = f();", "}"]);
    _assertPropagatedReturnType(code, typeProvider.dynamicType, typeProvider.stringType);
  }

  void test_propagatedReturnType_function_lessSpecificStaticReturnType() {
    String code = EngineTestCase.createSource(["Object f() => 42;", "main() {", "  var v = f();", "}"]);
    _assertPropagatedReturnType(code, typeProvider.dynamicType, typeProvider.intType);
  }

  void test_propagatedReturnType_function_moreSpecificStaticReturnType() {
    String code = EngineTestCase.createSource([
        "int f(v) => (v as num);",
        "main() {",
        "  var v = f(3);",
        "}"]);
    _assertPropagatedReturnType(code, typeProvider.dynamicType, typeProvider.intType);
  }

  void test_propagatedReturnType_function_noReturnTypeName_blockBody_multipleReturns() {
    String code = EngineTestCase.createSource([
        "f() {",
        "  if (true) return 0;",
        "  return 1.0;",
        "}",
        "main() {",
        "  var v = f();",
        "}"]);
    _assertPropagatedReturnType(code, typeProvider.dynamicType, typeProvider.numType);
  }

  void test_propagatedReturnType_function_noReturnTypeName_blockBody_oneReturn() {
    String code = EngineTestCase.createSource([
        "f() {",
        "  var z = 42;",
        "  return z;",
        "}",
        "main() {",
        "  var v = f();",
        "}"]);
    _assertPropagatedReturnType(code, typeProvider.dynamicType, typeProvider.intType);
  }

  void test_propagatedReturnType_function_noReturnTypeName_expressionBody() {
    String code = EngineTestCase.createSource(["f() => 42;", "main() {", "  var v = f();", "}"]);
    _assertPropagatedReturnType(code, typeProvider.dynamicType, typeProvider.intType);
  }

  void test_propagatedReturnType_localFunction() {
    String code = EngineTestCase.createSource(["main() {", "  f() => 42;", "  var v = f();", "}"]);
    _assertPropagatedReturnType(code, typeProvider.dynamicType, typeProvider.intType);
  }

  void test_query() {
    Source source = addSource(EngineTestCase.createSource([
        "import 'dart:html';",
        "",
        "main() {",
        "  var v1 = query('a');",
        "  var v2 = query('A');",
        "  var v3 = query('body:active');",
        "  var v4 = query('button[foo=\"bar\"]');",
        "  var v5 = query('div.class');",
        "  var v6 = query('input#id');",
        "  var v7 = query('select#id');",
        "  // invocation of method",
        "  var m1 = document.query('div');",
        " // unsupported currently",
        "  var b1 = query('noSuchTag');",
        "  var b2 = query('DART_EDITOR_NO_SUCH_TYPE');",
        "  var b3 = query('body div');",
        "  return [v1, v2, v3, v4, v5, v6, v7, m1, b1, b2, b3];",
        "}"]));
    LibraryElement library = resolve(source);
    assertNoErrors(source);
    verify([source]);
    CompilationUnit unit = resolveCompilationUnit(source, library);
    FunctionDeclaration main = unit.declarations[0] as FunctionDeclaration;
    BlockFunctionBody body = main.functionExpression.body as BlockFunctionBody;
    ReturnStatement statement = body.block.statements[11] as ReturnStatement;
    NodeList<Expression> elements = (statement.expression as ListLiteral).elements;
    JUnitTestCase.assertEquals("AnchorElement", elements[0].propagatedType.name);
    JUnitTestCase.assertEquals("AnchorElement", elements[1].propagatedType.name);
    JUnitTestCase.assertEquals("BodyElement", elements[2].propagatedType.name);
    JUnitTestCase.assertEquals("ButtonElement", elements[3].propagatedType.name);
    JUnitTestCase.assertEquals("DivElement", elements[4].propagatedType.name);
    JUnitTestCase.assertEquals("InputElement", elements[5].propagatedType.name);
    JUnitTestCase.assertEquals("SelectElement", elements[6].propagatedType.name);
    JUnitTestCase.assertEquals("DivElement", elements[7].propagatedType.name);
    JUnitTestCase.assertEquals("Element", elements[8].propagatedType.name);
    JUnitTestCase.assertEquals("Element", elements[9].propagatedType.name);
    JUnitTestCase.assertEquals("Element", elements[10].propagatedType.name);
  }

  /**
   * @param code the code that assigns the value to the variable "v", no matter how. We check that
   *          "v" has expected static and propagated type.
   */
  void _assertPropagatedReturnType(String code, DartType expectedStaticType, DartType expectedPropagatedType) {
    SimpleIdentifier identifier = _findMarkedIdentifier(code, "v = ");
    JUnitTestCase.assertSame(expectedStaticType, identifier.staticType);
    JUnitTestCase.assertSame(expectedPropagatedType, identifier.propagatedType);
  }

  /**
   * Check the static and propagated types of the expression marked with "; // marker" comment.
   *
   * @param code source code to analyze, with the expression to check marked with "// marker".
   * @param expectedStaticType if non-null, check actual static type is equal to this.
   * @param expectedPropagatedType if non-null, check actual static type is equal to this.
   * @throws Exception
   */
  void _assertTypeOfMarkedExpression(String code, DartType expectedStaticType, DartType expectedPropagatedType) {
    SimpleIdentifier identifier = _findMarkedIdentifier(code, "; // marker");
    if (expectedStaticType != null) {
      JUnitTestCase.assertEquals(expectedStaticType, identifier.staticType);
    }
    if (expectedPropagatedType != null) {
      JUnitTestCase.assertEquals(expectedPropagatedType, identifier.propagatedType);
    }
  }

  /**
   * Return the `SimpleIdentifier` marked by `marker`. The source code must have no
   * errors and be verifiable.
   *
   * @param code source code to analyze.
   * @param marker marker identifying sought after expression in source code.
   * @return expression marked by the marker.
   * @throws Exception
   */
  SimpleIdentifier _findMarkedIdentifier(String code, String marker) {
    try {
      Source source = addSource(code);
      LibraryElement library = resolve(source);
      assertNoErrors(source);
      verify([source]);
      CompilationUnit unit = resolveCompilationUnit(source, library);
      // Could generalize this further by making [SimpleIdentifier.class] a parameter.
      return EngineTestCase.findNode(unit, code, marker, (node) => node is SimpleIdentifier);
    } catch (exception) {
      // Is there a better exception to throw here? The point is that an assertion failure
      // here should be a failure, in both "test_*" and "fail_*" tests.
      // However, an assertion failure is success for the purpose of "fail_*" tests, so
      // without catching them here "fail_*" tests can succeed by failing for the wrong reason.
      throw new JavaException("Unexexpected assertion failure: ${exception}");
    }
  }
}

class TypeProviderImplTest extends EngineTestCase {
  void test_creation() {
    //
    // Create a mock library element with the types expected to be in dart:core. We cannot use
    // either ElementFactory or TestTypeProvider (which uses ElementFactory) because we side-effect
    // the elements in ways that would break other tests.
    //
    InterfaceType objectType = _classElement("Object", null, []).type;
    InterfaceType boolType = _classElement("bool", objectType, []).type;
    InterfaceType numType = _classElement("num", objectType, []).type;
    InterfaceType doubleType = _classElement("double", numType, []).type;
    InterfaceType functionType = _classElement("Function", objectType, []).type;
    InterfaceType intType = _classElement("int", numType, []).type;
    InterfaceType listType = _classElement("List", objectType, ["E"]).type;
    InterfaceType mapType = _classElement("Map", objectType, ["K", "V"]).type;
    InterfaceType stackTraceType = _classElement("StackTrace", objectType, []).type;
    InterfaceType stringType = _classElement("String", objectType, []).type;
    InterfaceType symbolType = _classElement("Symbol", objectType, []).type;
    InterfaceType typeType = _classElement("Type", objectType, []).type;
    CompilationUnitElementImpl coreUnit = new CompilationUnitElementImpl("core.dart");
    coreUnit.types = <ClassElement> [
        boolType.element,
        doubleType.element,
        functionType.element,
        intType.element,
        listType.element,
        mapType.element,
        objectType.element,
        stackTraceType.element,
        stringType.element,
        symbolType.element,
        typeType.element];
    LibraryElementImpl coreLibrary = new LibraryElementImpl.forNode(new AnalysisContextImpl(), AstFactory.libraryIdentifier2(["dart.core"]));
    coreLibrary.definingCompilationUnit = coreUnit;
    //
    // Create a type provider and ensure that it can return the expected types.
    //
    TypeProviderImpl provider = new TypeProviderImpl(coreLibrary);
    JUnitTestCase.assertSame(boolType, provider.boolType);
    JUnitTestCase.assertNotNull(provider.bottomType);
    JUnitTestCase.assertSame(doubleType, provider.doubleType);
    JUnitTestCase.assertNotNull(provider.dynamicType);
    JUnitTestCase.assertSame(functionType, provider.functionType);
    JUnitTestCase.assertSame(intType, provider.intType);
    JUnitTestCase.assertSame(listType, provider.listType);
    JUnitTestCase.assertSame(mapType, provider.mapType);
    JUnitTestCase.assertSame(objectType, provider.objectType);
    JUnitTestCase.assertSame(stackTraceType, provider.stackTraceType);
    JUnitTestCase.assertSame(stringType, provider.stringType);
    JUnitTestCase.assertSame(symbolType, provider.symbolType);
    JUnitTestCase.assertSame(typeType, provider.typeType);
  }

  ClassElement _classElement(String typeName, InterfaceType superclassType, List<String> parameterNames) {
    ClassElementImpl element = new ClassElementImpl.forNode(AstFactory.identifier3(typeName));
    element.supertype = superclassType;
    InterfaceTypeImpl type = new InterfaceTypeImpl.con1(element);
    element.type = type;
    int count = parameterNames.length;
    if (count > 0) {
      List<TypeParameterElementImpl> typeParameters = new List<TypeParameterElementImpl>(count);
      List<TypeParameterTypeImpl> typeArguments = new List<TypeParameterTypeImpl>(count);
      for (int i = 0; i < count; i++) {
        TypeParameterElementImpl typeParameter = new TypeParameterElementImpl.forNode(AstFactory.identifier3(parameterNames[i]));
        typeParameters[i] = typeParameter;
        typeArguments[i] = new TypeParameterTypeImpl(typeParameter);
        typeParameter.type = typeArguments[i];
      }
      element.typeParameters = typeParameters;
      type.typeArguments = typeArguments;
    }
    return element;
  }
}

class TypeResolverVisitorTest extends EngineTestCase {
  /**
   * The error listener to which errors will be reported.
   */
  GatheringErrorListener _listener;

  /**
   * The object representing the information about the library in which the types are being
   * resolved.
   */
  Library _library;

  /**
   * The type provider used to access the types.
   */
  TestTypeProvider _typeProvider;

  /**
   * The visitor used to resolve types needed to form the type hierarchy.
   */
  TypeResolverVisitor _visitor;

  /**
   * The visitor used to resolve types needed to form the type hierarchy.
   */
  ImplicitConstructorBuilder _implicitConstructorBuilder;

  void fail_visitConstructorDeclaration() {
    JUnitTestCase.fail("Not yet tested");
    _listener.assertNoErrors();
  }

  void fail_visitFunctionDeclaration() {
    JUnitTestCase.fail("Not yet tested");
    _listener.assertNoErrors();
  }

  void fail_visitFunctionTypeAlias() {
    JUnitTestCase.fail("Not yet tested");
    _listener.assertNoErrors();
  }

  void fail_visitFunctionTypedFormalParameter() {
    JUnitTestCase.fail("Not yet tested");
    _listener.assertNoErrors();
  }

  void fail_visitMethodDeclaration() {
    JUnitTestCase.fail("Not yet tested");
    _listener.assertNoErrors();
  }

  void fail_visitVariableDeclaration() {
    JUnitTestCase.fail("Not yet tested");
    ClassElement type = ElementFactory.classElement2("A", []);
    VariableDeclaration node = AstFactory.variableDeclaration("a");
    AstFactory.variableDeclarationList(null, AstFactory.typeName(type, []), [node]);
    //resolve(node);
    JUnitTestCase.assertSame(type.type, node.name.staticType);
    _listener.assertNoErrors();
  }

  @override
  void setUp() {
    _listener = new GatheringErrorListener();
    SourceFactory factory = new SourceFactory([new FileUriResolver()]);
    AnalysisContextImpl context = new AnalysisContextImpl();
    context.sourceFactory = factory;
    Source librarySource = new FileBasedSource.con1(FileUtilities2.createFile("/lib.dart"));
    _library = new Library(context, _listener, librarySource);
    LibraryElementImpl element = new LibraryElementImpl.forNode(context, AstFactory.libraryIdentifier2(["lib"]));
    element.definingCompilationUnit = new CompilationUnitElementImpl("lib.dart");
    _library.libraryElement = element;
    _typeProvider = new TestTypeProvider();
    _visitor = new TypeResolverVisitor.con1(_library, librarySource, _typeProvider);
    _implicitConstructorBuilder = new ImplicitConstructorBuilder.con1(_library, librarySource, _typeProvider);
  }

  void test_visitCatchClause_exception() {
    // catch (e)
    CatchClause clause = AstFactory.catchClause("e", []);
    SimpleIdentifier exceptionParameter = clause.exceptionParameter;
    exceptionParameter.staticElement = new LocalVariableElementImpl.forNode(exceptionParameter);
    _resolveCatchClause(clause, _typeProvider.dynamicType, null, []);
    _listener.assertNoErrors();
  }

  void test_visitCatchClause_exception_stackTrace() {
    // catch (e, s)
    CatchClause clause = AstFactory.catchClause2("e", "s", []);
    SimpleIdentifier exceptionParameter = clause.exceptionParameter;
    exceptionParameter.staticElement = new LocalVariableElementImpl.forNode(exceptionParameter);
    SimpleIdentifier stackTraceParameter = clause.stackTraceParameter;
    stackTraceParameter.staticElement = new LocalVariableElementImpl.forNode(stackTraceParameter);
    _resolveCatchClause(clause, _typeProvider.dynamicType, _typeProvider.stackTraceType, []);
    _listener.assertNoErrors();
  }

  void test_visitCatchClause_on_exception() {
    // on E catch (e)
    ClassElement exceptionElement = ElementFactory.classElement2("E", []);
    TypeName exceptionType = AstFactory.typeName(exceptionElement, []);
    CatchClause clause = AstFactory.catchClause4(exceptionType, "e", []);
    SimpleIdentifier exceptionParameter = clause.exceptionParameter;
    exceptionParameter.staticElement = new LocalVariableElementImpl.forNode(exceptionParameter);
    _resolveCatchClause(clause, exceptionElement.type, null, [exceptionElement]);
    _listener.assertNoErrors();
  }

  void test_visitCatchClause_on_exception_stackTrace() {
    // on E catch (e, s)
    ClassElement exceptionElement = ElementFactory.classElement2("E", []);
    TypeName exceptionType = AstFactory.typeName(exceptionElement, []);
    (exceptionType.name as SimpleIdentifier).staticElement = exceptionElement;
    CatchClause clause = AstFactory.catchClause5(exceptionType, "e", "s", []);
    SimpleIdentifier exceptionParameter = clause.exceptionParameter;
    exceptionParameter.staticElement = new LocalVariableElementImpl.forNode(exceptionParameter);
    SimpleIdentifier stackTraceParameter = clause.stackTraceParameter;
    stackTraceParameter.staticElement = new LocalVariableElementImpl.forNode(stackTraceParameter);
    _resolveCatchClause(clause, exceptionElement.type, _typeProvider.stackTraceType, [exceptionElement]);
    _listener.assertNoErrors();
  }

  void test_visitClassDeclaration() {
    // class A extends B with C implements D {}
    // class B {}
    // class C {}
    // class D {}
    ClassElement elementA = ElementFactory.classElement2("A", []);
    ClassElement elementB = ElementFactory.classElement2("B", []);
    ClassElement elementC = ElementFactory.classElement2("C", []);
    ClassElement elementD = ElementFactory.classElement2("D", []);
    ExtendsClause extendsClause = AstFactory.extendsClause(AstFactory.typeName(elementB, []));
    WithClause withClause = AstFactory.withClause([AstFactory.typeName(elementC, [])]);
    ImplementsClause implementsClause = AstFactory.implementsClause([AstFactory.typeName(elementD, [])]);
    ClassDeclaration declaration = AstFactory.classDeclaration(null, "A", null, extendsClause, withClause, implementsClause, []);
    declaration.name.staticElement = elementA;
    _resolveNode(declaration, [elementA, elementB, elementC, elementD]);
    JUnitTestCase.assertSame(elementB.type, elementA.supertype);
    List<InterfaceType> mixins = elementA.mixins;
    EngineTestCase.assertLength(1, mixins);
    JUnitTestCase.assertSame(elementC.type, mixins[0]);
    List<InterfaceType> interfaces = elementA.interfaces;
    EngineTestCase.assertLength(1, interfaces);
    JUnitTestCase.assertSame(elementD.type, interfaces[0]);
    _listener.assertNoErrors();
  }

  void test_visitClassDeclaration_instanceMemberCollidesWithClass() {
    // class A {}
    // class B extends A {
    //   void A() {}
    // }
    ClassElementImpl elementA = ElementFactory.classElement2("A", []);
    ClassElementImpl elementB = ElementFactory.classElement2("B", []);
    elementB.methods = <MethodElement> [ElementFactory.methodElement("A", VoidTypeImpl.instance, [])];
    ExtendsClause extendsClause = AstFactory.extendsClause(AstFactory.typeName(elementA, []));
    ClassDeclaration declaration = AstFactory.classDeclaration(null, "B", null, extendsClause, null, null, []);
    declaration.name.staticElement = elementB;
    _resolveNode(declaration, [elementA, elementB]);
    JUnitTestCase.assertSame(elementA.type, elementB.supertype);
    _listener.assertNoErrors();
  }

  void test_visitClassTypeAlias() {
    // class A = B with C implements D;
    ClassElement elementA = ElementFactory.classElement2("A", []);
    ClassElement elementB = ElementFactory.classElement2("B", []);
    ClassElement elementC = ElementFactory.classElement2("C", []);
    ClassElement elementD = ElementFactory.classElement2("D", []);
    WithClause withClause = AstFactory.withClause([AstFactory.typeName(elementC, [])]);
    ImplementsClause implementsClause = AstFactory.implementsClause([AstFactory.typeName(elementD, [])]);
    ClassTypeAlias alias = AstFactory.classTypeAlias("A", null, null, AstFactory.typeName(elementB, []), withClause, implementsClause);
    alias.name.staticElement = elementA;
    _resolveNode(alias, [elementA, elementB, elementC, elementD]);
    JUnitTestCase.assertSame(elementB.type, elementA.supertype);
    List<InterfaceType> mixins = elementA.mixins;
    EngineTestCase.assertLength(1, mixins);
    JUnitTestCase.assertSame(elementC.type, mixins[0]);
    List<InterfaceType> interfaces = elementA.interfaces;
    EngineTestCase.assertLength(1, interfaces);
    JUnitTestCase.assertSame(elementD.type, interfaces[0]);
    _listener.assertNoErrors();
  }

  void test_visitFieldFormalParameter_functionType() {
    InterfaceType intType = _typeProvider.intType;
    TypeName intTypeName = AstFactory.typeName4("int", []);
    String innerParameterName = "a";
    SimpleFormalParameter parameter = AstFactory.simpleFormalParameter3(innerParameterName);
    parameter.identifier.staticElement = ElementFactory.requiredParameter(innerParameterName);
    String outerParameterName = "p";
    FormalParameter node = AstFactory.fieldFormalParameter(null, intTypeName, outerParameterName, AstFactory.formalParameterList([parameter]));
    node.identifier.staticElement = ElementFactory.requiredParameter(outerParameterName);
    DartType parameterType = _resolveFormalParameter(node, [intType.element]);
    EngineTestCase.assertInstanceOf((obj) => obj is FunctionType, FunctionType, parameterType);
    FunctionType functionType = parameterType as FunctionType;
    JUnitTestCase.assertSame(intType, functionType.returnType);
    EngineTestCase.assertLength(1, functionType.parameters);
    _listener.assertNoErrors();
  }

  void test_visitFieldFormalParameter_noType() {
    String parameterName = "p";
    FormalParameter node = AstFactory.fieldFormalParameter(Keyword.VAR, null, parameterName);
    node.identifier.staticElement = ElementFactory.requiredParameter(parameterName);
    JUnitTestCase.assertSame(_typeProvider.dynamicType, _resolveFormalParameter(node, []));
    _listener.assertNoErrors();
  }

  void test_visitFieldFormalParameter_type() {
    InterfaceType intType = _typeProvider.intType;
    TypeName intTypeName = AstFactory.typeName4("int", []);
    String parameterName = "p";
    FormalParameter node = AstFactory.fieldFormalParameter(null, intTypeName, parameterName);
    node.identifier.staticElement = ElementFactory.requiredParameter(parameterName);
    JUnitTestCase.assertSame(intType, _resolveFormalParameter(node, [intType.element]));
    _listener.assertNoErrors();
  }

  void test_visitSimpleFormalParameter_noType() {
    // p
    FormalParameter node = AstFactory.simpleFormalParameter3("p");
    node.identifier.staticElement = new ParameterElementImpl.forNode(AstFactory.identifier3("p"));
    JUnitTestCase.assertSame(_typeProvider.dynamicType, _resolveFormalParameter(node, []));
    _listener.assertNoErrors();
  }

  void test_visitSimpleFormalParameter_type() {
    // int p
    InterfaceType intType = _typeProvider.intType;
    ClassElement intElement = intType.element;
    FormalParameter node = AstFactory.simpleFormalParameter4(AstFactory.typeName(intElement, []), "p");
    SimpleIdentifier identifier = node.identifier;
    ParameterElementImpl element = new ParameterElementImpl.forNode(identifier);
    identifier.staticElement = element;
    JUnitTestCase.assertSame(intType, _resolveFormalParameter(node, [intElement]));
    _listener.assertNoErrors();
  }

  void test_visitTypeName_noParameters_noArguments() {
    ClassElement classA = ElementFactory.classElement2("A", []);
    TypeName typeName = AstFactory.typeName(classA, []);
    typeName.type = null;
    _resolveNode(typeName, [classA]);
    JUnitTestCase.assertSame(classA.type, typeName.type);
    _listener.assertNoErrors();
  }

  void test_visitTypeName_parameters_arguments() {
    ClassElement classA = ElementFactory.classElement2("A", ["E"]);
    ClassElement classB = ElementFactory.classElement2("B", []);
    TypeName typeName = AstFactory.typeName(classA, [AstFactory.typeName(classB, [])]);
    typeName.type = null;
    _resolveNode(typeName, [classA, classB]);
    InterfaceType resultType = typeName.type as InterfaceType;
    JUnitTestCase.assertSame(classA, resultType.element);
    List<DartType> resultArguments = resultType.typeArguments;
    EngineTestCase.assertLength(1, resultArguments);
    JUnitTestCase.assertSame(classB.type, resultArguments[0]);
    _listener.assertNoErrors();
  }

  void test_visitTypeName_parameters_noArguments() {
    ClassElement classA = ElementFactory.classElement2("A", ["E"]);
    TypeName typeName = AstFactory.typeName(classA, []);
    typeName.type = null;
    _resolveNode(typeName, [classA]);
    InterfaceType resultType = typeName.type as InterfaceType;
    JUnitTestCase.assertSame(classA, resultType.element);
    List<DartType> resultArguments = resultType.typeArguments;
    EngineTestCase.assertLength(1, resultArguments);
    JUnitTestCase.assertSame(DynamicTypeImpl.instance, resultArguments[0]);
    _listener.assertNoErrors();
  }

  void test_visitTypeName_void() {
    ClassElement classA = ElementFactory.classElement2("A", []);
    TypeName typeName = AstFactory.typeName4("void", []);
    _resolveNode(typeName, [classA]);
    JUnitTestCase.assertSame(VoidTypeImpl.instance, typeName.type);
    _listener.assertNoErrors();
  }

  /**
   * Analyze the given catch clause and assert that the types of the parameters have been set to the
   * given types. The types can be null if the catch clause does not have the corresponding
   * parameter.
   *
   * @param node the catch clause to be analyzed
   * @param exceptionType the expected type of the exception parameter
   * @param stackTraceType the expected type of the stack trace parameter
   * @param definedElements the elements that are to be defined in the scope in which the element is
   *          being resolved
   */
  void _resolveCatchClause(CatchClause node, DartType exceptionType, InterfaceType stackTraceType, List<Element> definedElements) {
    _resolveNode(node, definedElements);
    SimpleIdentifier exceptionParameter = node.exceptionParameter;
    if (exceptionParameter != null) {
      JUnitTestCase.assertSame(exceptionType, exceptionParameter.staticType);
    }
    SimpleIdentifier stackTraceParameter = node.stackTraceParameter;
    if (stackTraceParameter != null) {
      JUnitTestCase.assertSame(stackTraceType, stackTraceParameter.staticType);
    }
  }

  /**
   * Return the type associated with the given parameter after the static type analyzer has computed
   * a type for it.
   *
   * @param node the parameter with which the type is associated
   * @param definedElements the elements that are to be defined in the scope in which the element is
   *          being resolved
   * @return the type associated with the parameter
   */
  DartType _resolveFormalParameter(FormalParameter node, List<Element> definedElements) {
    _resolveNode(node, definedElements);
    return (node.identifier.staticElement as ParameterElement).type;
  }

  /**
   * Return the element associated with the given identifier after the resolver has resolved the
   * identifier.
   *
   * @param node the expression to be resolved
   * @param definedElements the elements that are to be defined in the scope in which the element is
   *          being resolved
   * @return the element to which the expression was resolved
   */
  void _resolveNode(AstNode node, List<Element> definedElements) {
    for (Element element in definedElements) {
      _library.libraryScope.define(element);
    }
    node.accept(_visitor);
    node.accept(_implicitConstructorBuilder);
  }
}

main() {
  _ut.groupSep = ' | ';
  runReflectiveTests(AnalysisDeltaTest);
  runReflectiveTests(ChangeSetTest);
  runReflectiveTests(EnclosedScopeTest);
  runReflectiveTests(LibraryImportScopeTest);
  runReflectiveTests(LibraryScopeTest);
  runReflectiveTests(ScopeBuilderTest);
  runReflectiveTests(ScopeTest);
  runReflectiveTests(DeclarationMatcherTest);
  runReflectiveTests(ElementResolverTest);
  runReflectiveTests(IncrementalResolverTest);
  runReflectiveTests(InheritanceManagerTest);
  runReflectiveTests(LibraryElementBuilderTest);
  runReflectiveTests(LibraryResolver2Test);
  runReflectiveTests(LibraryResolverTest);
  runReflectiveTests(LibraryTest);
  runReflectiveTests(StaticTypeAnalyzerTest);
  runReflectiveTests(StaticTypeAnalyzer2Test);
  runReflectiveTests(SubtypeManagerTest);
  runReflectiveTests(TypeOverrideManagerTest);
  runReflectiveTests(TypeProviderImplTest);
  runReflectiveTests(TypeResolverVisitorTest);
  runReflectiveTests(CheckedModeCompileTimeErrorCodeTest);
  runReflectiveTests(ErrorResolverTest);
  runReflectiveTests(HintCodeTest);
  runReflectiveTests(MemberMapTest);
  runReflectiveTests(NonHintCodeTest);
  runReflectiveTests(SimpleResolverTest);
  runReflectiveTests(StrictModeTest);
  runReflectiveTests(TypePropagationTest);
}