blob: 5ce754c21ed62b1fafd44a7e8039d9cabc3f2b78 [file] [log] [blame]
// 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 analyzer.test.generated.resolver_test;
import 'dart:async';
import 'dart:collection';
import 'package:analyzer/dart/ast/ast.dart';
import 'package:analyzer/dart/ast/standard_ast_factory.dart';
import 'package:analyzer/dart/ast/standard_resolution_map.dart';
import 'package:analyzer/dart/ast/token.dart';
import 'package:analyzer/dart/ast/visitor.dart';
import 'package:analyzer/dart/element/element.dart';
import 'package:analyzer/dart/element/type.dart';
import 'package:analyzer/file_system/memory_file_system.dart';
import 'package:analyzer/src/dart/ast/ast.dart';
import 'package:analyzer/src/dart/element/builder.dart';
import 'package:analyzer/src/dart/element/element.dart';
import 'package:analyzer/src/dart/element/type.dart';
import 'package:analyzer/src/error/codes.dart';
import 'package:analyzer/src/generated/engine.dart';
import 'package:analyzer/src/generated/parser.dart' show ParserErrorCode;
import 'package:analyzer/src/generated/resolver.dart';
import 'package:analyzer/src/generated/source_io.dart';
import 'package:analyzer/src/generated/testing/ast_test_factory.dart';
import 'package:analyzer/src/generated/testing/element_factory.dart';
import 'package:analyzer/src/generated/testing/test_type_provider.dart';
import 'package:analyzer/src/generated/utilities_dart.dart';
import 'package:analyzer/src/source/source_resource.dart';
import 'package:test/test.dart';
import 'package:test_reflective_loader/test_reflective_loader.dart';
import 'analysis_context_factory.dart';
import 'parser_test.dart';
import 'resolver_test_case.dart';
import 'test_support.dart';
main() {
defineReflectiveSuite(() {
defineReflectiveTests(AnalysisDeltaTest);
defineReflectiveTests(ChangeSetTest);
defineReflectiveTests(EnclosedScopeTest);
defineReflectiveTests(ErrorResolverTest);
defineReflectiveTests(LibraryImportScopeTest);
defineReflectiveTests(LibraryScopeTest);
defineReflectiveTests(PrefixedNamespaceTest);
defineReflectiveTests(ScopeTest);
defineReflectiveTests(StrictModeTest);
defineReflectiveTests(SubtypeManagerTest);
defineReflectiveTests(TypeOverrideManagerTest);
defineReflectiveTests(TypePropagationTest);
defineReflectiveTests(TypeProviderImplTest);
defineReflectiveTests(TypeResolverVisitorTest);
});
}
@reflectiveTest
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;
expect(addedSources, hasLength(2));
expect(addedSources, unorderedEquals([source1, source2]));
}
void test_getAnalysisLevels() {
AnalysisDelta delta = new AnalysisDelta();
expect(delta.analysisLevels.length, 0);
}
void test_setAnalysisLevel() {
AnalysisDelta delta = new AnalysisDelta();
delta.setAnalysisLevel(source1, AnalysisLevel.ALL);
delta.setAnalysisLevel(source2, AnalysisLevel.ERRORS);
Map<Source, AnalysisLevel> levels = delta.analysisLevels;
expect(levels.length, 2);
expect(levels[source1], AnalysisLevel.ALL);
expect(levels[source2], AnalysisLevel.ERRORS);
}
void test_toString() {
AnalysisDelta delta = new AnalysisDelta();
delta.setAnalysisLevel(new TestSource(), AnalysisLevel.ALL);
String result = delta.toString();
expect(result, isNotNull);
expect(result.length > 0, isTrue);
}
}
@reflectiveTest
class ChangeSetTest extends EngineTestCase {
void test_changedContent() {
TestSource source = new TestSource();
String content = "";
ChangeSet changeSet = new ChangeSet();
changeSet.changedContent(source, content);
expect(changeSet.addedSources, hasLength(0));
expect(changeSet.changedSources, hasLength(0));
Map<Source, String> map = changeSet.changedContents;
expect(map, hasLength(1));
expect(map[source], same(content));
expect(changeSet.changedRanges, hasLength(0));
expect(changeSet.removedSources, hasLength(0));
expect(changeSet.removedContainers, hasLength(0));
}
void test_changedRange() {
TestSource source = new TestSource();
String content = "";
ChangeSet changeSet = new ChangeSet();
changeSet.changedRange(source, content, 1, 2, 3);
expect(changeSet.addedSources, hasLength(0));
expect(changeSet.changedSources, hasLength(0));
expect(changeSet.changedContents, hasLength(0));
Map<Source, ChangeSet_ContentChange> map = changeSet.changedRanges;
expect(map, hasLength(1));
ChangeSet_ContentChange change = map[source];
expect(change, isNotNull);
expect(change.contents, content);
expect(change.offset, 1);
expect(change.oldLength, 2);
expect(change.newLength, 3);
expect(changeSet.removedSources, hasLength(0));
expect(changeSet.removedContainers, hasLength(0));
}
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.removedSource(new TestSource());
changeSet
.removedContainer(new SourceContainer_ChangeSetTest_test_toString());
expect(changeSet.toString(), isNotNull);
}
}
@reflectiveTest
class EnclosedScopeTest extends ResolverTestCase {
test_define_duplicate() async {
Scope rootScope = new _RootScope();
EnclosedScope scope = new EnclosedScope(rootScope);
SimpleIdentifier identifier = AstTestFactory.identifier3('v');
VariableElement element1 = ElementFactory.localVariableElement(identifier);
VariableElement element2 = ElementFactory.localVariableElement(identifier);
scope.define(element1);
scope.define(element2);
expect(scope.lookup(identifier, null), same(element1));
}
}
@reflectiveTest
class ErrorResolverTest extends ResolverTestCase {
test_breakLabelOnSwitchMember() async {
Source source = addSource(r'''
class A {
void m(int i) {
switch (i) {
l: case 0:
break;
case 1:
break l;
}
}
}''');
await computeAnalysisResult(source);
assertErrors(source, [ResolverErrorCode.BREAK_LABEL_ON_SWITCH_MEMBER]);
verify([source]);
}
test_continueLabelOnSwitch() async {
Source source = addSource(r'''
class A {
void m(int i) {
l: switch (i) {
case 0:
continue l;
}
}
}''');
await computeAnalysisResult(source);
assertErrors(source, [ResolverErrorCode.CONTINUE_LABEL_ON_SWITCH]);
verify([source]);
}
test_enclosingElement_invalidLocalFunction() async {
Source source = addSource(r'''
class C {
C() {
int get x => 0;
}
}''');
LibraryElement library = resolve2(source);
expect(library, isNotNull);
var unit = library.definingCompilationUnit;
expect(unit, isNotNull);
var types = unit.types;
expect(types, isNotNull);
expect(types, hasLength(1));
var type = types[0];
expect(type, isNotNull);
var constructors = type.constructors;
expect(constructors, isNotNull);
expect(constructors, hasLength(1));
ConstructorElement constructor = constructors[0];
expect(constructor, isNotNull);
List<FunctionElement> functions = constructor.functions;
expect(functions, isNotNull);
expect(functions, hasLength(1));
expect(functions[0].enclosingElement, constructor);
await computeAnalysisResult(source);
assertErrors(source, [ParserErrorCode.GETTER_IN_FUNCTION]);
}
}
/**
* Tests for generic method and function resolution that do not use strong mode.
*/
@reflectiveTest
class GenericMethodResolverTest extends StaticTypeAnalyzer2TestShared {
test_genericMethod_propagatedType_promotion() async {
// Regression test for:
// https://github.com/dart-lang/sdk/issues/25340
//
// Note, after https://github.com/dart-lang/sdk/issues/25486 the original
// strong mode example won't work, as we now compute a static type and
// therefore discard the propagated type.
//
// So this test does not use strong mode.
await resolveTestUnit(r'''
abstract class Iter {
List<S> map<S>(S f(x));
}
class C {}
C toSpan(dynamic element) {
if (element is Iter) {
var y = element.map(toSpan);
}
return null;
}''');
expectIdentifierType('y = ', 'dynamic', 'List<dynamic>');
}
}
@reflectiveTest
class LibraryImportScopeTest extends ResolverTestCase {
void test_creation_empty() {
new LibraryImportScope(createDefaultTestLibrary());
}
void test_creation_nonEmpty() {
AnalysisContext context = AnalysisContextFactory.contextWithCore();
String importedTypeName = "A";
ClassElement importedType = new ClassElementImpl.forNode(
AstTestFactory.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];
Scope scope = new LibraryImportScope(definingLibrary);
expect(
scope.lookup(
AstTestFactory.identifier3(importedTypeName), definingLibrary),
importedType);
}
void test_prefixedAndNonPrefixed() {
AnalysisContext context = AnalysisContextFactory.contextWithCore();
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
];
Scope scope = new LibraryImportScope(importingLibrary);
Element prefixedElement = scope.lookup(
AstTestFactory.identifier5(prefixName, typeName), importingLibrary);
expect(prefixedElement, same(prefixedType));
Element nonPrefixedElement =
scope.lookup(AstTestFactory.identifier3(typeName), importingLibrary);
expect(nonPrefixedElement, same(nonPrefixedType));
}
}
@reflectiveTest
class LibraryScopeTest extends ResolverTestCase {
void test_creation_empty() {
new LibraryScope(createDefaultTestLibrary());
}
void test_creation_nonEmpty() {
AnalysisContext context = AnalysisContextFactory.contextWithCore();
String importedTypeName = "A";
ClassElement importedType = new ClassElementImpl.forNode(
AstTestFactory.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];
Scope scope = new LibraryScope(definingLibrary);
expect(
scope.lookup(
AstTestFactory.identifier3(importedTypeName), definingLibrary),
importedType);
}
}
@reflectiveTest
class PrefixedNamespaceTest extends ResolverTestCase {
void test_lookup_missing() {
ClassElement element = ElementFactory.classElement2('A');
PrefixedNamespace namespace = new PrefixedNamespace('p', _toMap([element]));
expect(namespace.get('p.B'), isNull);
}
void test_lookup_missing_matchesPrefix() {
ClassElement element = ElementFactory.classElement2('A');
PrefixedNamespace namespace = new PrefixedNamespace('p', _toMap([element]));
expect(namespace.get('p'), isNull);
}
void test_lookup_valid() {
ClassElement element = ElementFactory.classElement2('A');
PrefixedNamespace namespace = new PrefixedNamespace('p', _toMap([element]));
expect(namespace.get('p.A'), same(element));
}
HashMap<String, Element> _toMap(List<Element> elements) {
HashMap<String, Element> map = new HashMap<String, Element>();
for (Element element in elements) {
map[element.name] = element;
}
return map;
}
}
@reflectiveTest
class ScopeTest extends ResolverTestCase {
void test_define_duplicate() {
Scope scope = new _RootScope();
SimpleIdentifier identifier = AstTestFactory.identifier3('v');
VariableElement element1 = ElementFactory.localVariableElement(identifier);
VariableElement element2 = ElementFactory.localVariableElement(identifier);
scope.define(element1);
scope.define(element2);
expect(scope.localLookup('v', null), same(element1));
}
void test_isPrivateName_nonPrivate() {
expect(Scope.isPrivateName("Public"), isFalse);
}
void test_isPrivateName_private() {
expect(Scope.isPrivateName("_Private"), isTrue);
}
}
class SourceContainer_ChangeSetTest_test_toString implements SourceContainer {
@override
bool contains(Source source) => false;
}
/**
* 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>();
/**
* The TypeAnnotation nodes that were not resolved.
*/
List<TypeAnnotation> _unresolvedTypes = new List<TypeAnnotation>();
/**
* 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) {
StringBuffer buffer = new StringBuffer();
int unresolvedTypeCount = _unresolvedTypes.length;
if (unresolvedTypeCount > 0) {
buffer.write("Failed to resolve ");
buffer.write(unresolvedTypeCount);
buffer.write(" of ");
buffer.write(_resolvedTypeCount + unresolvedTypeCount);
buffer.writeln(" type names:");
for (TypeAnnotation identifier in _unresolvedTypes) {
buffer.write(" ");
buffer.write(identifier.toString());
buffer.write(" (");
buffer.write(_getFileName(identifier));
buffer.write(" : ");
buffer.write(identifier.offset);
buffer.writeln(")");
}
}
int unresolvedExpressionCount = _unresolvedExpressions.length;
if (unresolvedExpressionCount > 0) {
buffer.writeln("Failed to resolve ");
buffer.write(unresolvedExpressionCount);
buffer.write(" of ");
buffer.write(_resolvedExpressionCount + unresolvedExpressionCount);
buffer.writeln(" expressions:");
for (Expression expression in _unresolvedExpressions) {
buffer.write(" ");
buffer.write(expression.toString());
buffer.write(" (");
buffer.write(_getFileName(expression));
buffer.write(" : ");
buffer.write(expression.offset);
buffer.writeln(")");
}
}
int invalidlyPropagatedExpressionCount =
_invalidlyPropagatedExpressions.length;
if (invalidlyPropagatedExpressionCount > 0) {
buffer.writeln("Incorrectly propagated ");
buffer.write(invalidlyPropagatedExpressionCount);
buffer.write(" of ");
buffer.write(_propagatedExpressionCount);
buffer.writeln(" expressions:");
for (Expression expression in _invalidlyPropagatedExpressions) {
buffer.write(" ");
buffer.write(expression.toString());
buffer.write(" [");
buffer.write(
resolutionMap.staticTypeForExpression(expression).displayName);
buffer.write(", ");
buffer.write(resolutionMap
.propagatedTypeForExpression(expression)
.displayName);
buffer.writeln("]");
buffer.write(" ");
buffer.write(_getFileName(expression));
buffer.write(" : ");
buffer.write(expression.offset);
buffer.writeln(")");
}
}
fail(buffer.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 &&
resolutionMap.staticTypeForExpression(node.prefix).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 visitTypeAnnotation(TypeAnnotation node) {
if (node.type == null) {
_unresolvedTypes.add(node);
} else {
_resolvedTypeCount++;
}
return super.visitTypeAnnotation(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.
// TODO(brianwilkerson) Not visiting the children means that we won't catch
// type arguments that were not resolved.
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 resolutionMap
.elementDeclaredByCompilationUnit(rootCU)
.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.
*/
@reflectiveTest
class StrictModeTest extends ResolverTestCase {
fail_for() async {
Source source = addSource(r'''
int f(List<int> list) {
num sum = 0;
for (num i = 0; i < list.length; i++) {
sum += list[i];
}
}''');
await computeAnalysisResult(source);
assertErrors(source, [StaticTypeWarningCode.UNDEFINED_OPERATOR]);
}
@override
void setUp() {
AnalysisOptionsImpl options = new AnalysisOptionsImpl();
options.hint = false;
resetWith(options: options);
}
test_assert_is() async {
Source source = addSource(r'''
int f(num n) {
assert (n is int);
return n & 0x0F;
}''');
await computeAnalysisResult(source);
assertErrors(source, [StaticTypeWarningCode.UNDEFINED_OPERATOR]);
}
test_conditional_and_is() async {
Source source = addSource(r'''
int f(num n) {
return (n is int && n > 0) ? n & 0x0F : 0;
}''');
await computeAnalysisResult(source);
assertNoErrors(source);
}
test_conditional_is() async {
Source source = addSource(r'''
int f(num n) {
return (n is int) ? n & 0x0F : 0;
}''');
await computeAnalysisResult(source);
assertNoErrors(source);
}
test_conditional_isNot() async {
Source source = addSource(r'''
int f(num n) {
return (n is! int) ? 0 : n & 0x0F;
}''');
await computeAnalysisResult(source);
assertErrors(source, [StaticTypeWarningCode.UNDEFINED_OPERATOR]);
}
test_conditional_or_is() async {
Source source = addSource(r'''
int f(num n) {
return (n is! int || n < 0) ? 0 : n & 0x0F;
}''');
await computeAnalysisResult(source);
assertErrors(source, [StaticTypeWarningCode.UNDEFINED_OPERATOR]);
}
test_forEach() async {
Source source = addSource(r'''
int f(List<int> list) {
num sum = 0;
for (num n in list) {
sum += n & 0x0F;
}
}''');
await computeAnalysisResult(source);
assertErrors(source, [StaticTypeWarningCode.UNDEFINED_OPERATOR]);
}
test_if_and_is() async {
Source source = addSource(r'''
int f(num n) {
if (n is int && n > 0) {
return n & 0x0F;
}
return 0;
}''');
await computeAnalysisResult(source);
assertNoErrors(source);
}
test_if_is() async {
Source source = addSource(r'''
int f(num n) {
if (n is int) {
return n & 0x0F;
}
return 0;
}''');
await computeAnalysisResult(source);
assertNoErrors(source);
}
test_if_isNot() async {
Source source = addSource(r'''
int f(num n) {
if (n is! int) {
return 0;
} else {
return n & 0x0F;
}
}''');
await computeAnalysisResult(source);
assertErrors(source, [StaticTypeWarningCode.UNDEFINED_OPERATOR]);
}
test_if_isNot_abrupt() async {
Source source = addSource(r'''
int f(num n) {
if (n is! int) {
return 0;
}
return n & 0x0F;
}''');
await computeAnalysisResult(source);
assertErrors(source, [StaticTypeWarningCode.UNDEFINED_OPERATOR]);
}
test_if_or_is() async {
Source source = addSource(r'''
int f(num n) {
if (n is! int || n < 0) {
return 0;
} else {
return n & 0x0F;
}
}''');
await computeAnalysisResult(source);
assertErrors(source, [StaticTypeWarningCode.UNDEFINED_OPERATOR]);
}
test_localVar() async {
Source source = addSource(r'''
int f() {
num n = 1234;
return n & 0x0F;
}''');
await computeAnalysisResult(source);
assertErrors(source, [StaticTypeWarningCode.UNDEFINED_OPERATOR]);
}
}
@reflectiveTest
class SubtypeManagerTest {
/**
* The inheritance manager being tested.
*/
SubtypeManager _subtypeManager;
/**
* The compilation unit element containing all of the types setup in each test.
*/
CompilationUnitElementImpl _definingCompilationUnit;
void setUp() {
MemoryResourceProvider resourceProvider = new MemoryResourceProvider();
AnalysisContext context = AnalysisContextFactory.contextWithCore(
resourceProvider: resourceProvider);
Source source = new FileSource(resourceProvider.getFile("/test.dart"));
_definingCompilationUnit = new CompilationUnitElementImpl("test.dart");
_definingCompilationUnit.librarySource =
_definingCompilationUnit.source = source;
LibraryElementImpl definingLibrary =
ElementFactory.library(context, "test");
definingLibrary.definingCompilationUnit = _definingCompilationUnit;
_subtypeManager = new SubtypeManager();
}
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);
expect(subtypesOfA, hasLength(2));
expect(arraySubtypesOfA, unorderedEquals([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);
expect(subtypesOfA, hasLength(4));
expect(arraySubtypesOfA, unorderedEquals([classB, classC, classD, classE]));
expect(subtypesOfB, hasLength(3));
expect(arraySubtypesOfB, unorderedEquals([classC, classD, classE]));
}
void test_computeAllSubtypes_noSubtypes() {
//
// class A
//
ClassElementImpl classA = ElementFactory.classElement2("A");
_definingCompilationUnit.types = <ClassElement>[classA];
HashSet<ClassElement> subtypesOfA =
_subtypeManager.computeAllSubtypes(classA);
expect(subtypesOfA, hasLength(0));
}
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);
expect(subtypesOfA, hasLength(1));
expect(arraySubtypesOfA, unorderedEquals([classB]));
}
}
@reflectiveTest
class TypeOverrideManagerTest extends EngineTestCase {
void test_exitScope_noScopes() {
TypeOverrideManager manager = new TypeOverrideManager();
expect(() {
manager.exitScope();
}, throwsStateError);
}
void test_exitScope_oneScope() {
TypeOverrideManager manager = new TypeOverrideManager();
manager.enterScope();
manager.exitScope();
expect(() {
manager.exitScope();
}, throwsStateError);
}
void test_exitScope_twoScopes() {
TypeOverrideManager manager = new TypeOverrideManager();
manager.enterScope();
manager.exitScope();
manager.enterScope();
manager.exitScope();
expect(() {
manager.exitScope();
}, throwsStateError);
}
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();
expect(manager.getType(element), same(type));
}
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);
expect(manager.getType(element), same(type));
}
void test_getType_noOverride() {
TypeOverrideManager manager = new TypeOverrideManager();
manager.enterScope();
expect(manager.getType(ElementFactory.localVariableElement2("v")), isNull);
}
void test_getType_noScope() {
TypeOverrideManager manager = new TypeOverrideManager();
expect(manager.getType(ElementFactory.localVariableElement2("v")), isNull);
}
}
@reflectiveTest
class TypePropagationTest extends ResolverTestCase {
fail_mergePropagatedTypesAtJoinPoint_1() async {
// https://code.google.com/p/dart/issues/detail?id=19929
var code = r'''
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
}''';
CompilationUnit unit = await resolveSource(code);
assertTypeOfMarkedExpression(code, unit, null, typeProvider.dynamicType);
}
fail_mergePropagatedTypesAtJoinPoint_2() async {
// https://code.google.com/p/dart/issues/detail?id=19929
var code = r'''
f2(x) {
var y = [];
if (x) {
y = 0;
} else {
}
// Propagated type is [List] here: incorrect.
// Best we can do is [Object]?
return y; // marker
}''';
CompilationUnit unit = await resolveSource(code);
assertTypeOfMarkedExpression(code, unit, null, typeProvider.dynamicType);
}
fail_mergePropagatedTypesAtJoinPoint_3() async {
// https://code.google.com/p/dart/issues/detail?id=19929
var code = r'''
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
}''';
CompilationUnit unit = await resolveSource(code);
assertTypeOfMarkedExpression(code, unit, null, typeProvider.numType);
}
fail_mergePropagatedTypesAtJoinPoint_5() async {
// https://code.google.com/p/dart/issues/detail?id=19929
var code = r'''
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
}''';
CompilationUnit unit = await resolveSource(code);
assertTypeOfMarkedExpression(code, unit, null, typeProvider.dynamicType);
}
fail_mergePropagatedTypesAtJoinPoint_7() async {
// 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 = r'''
f() {
var x = 0;
var c = false;
var d = true;
while (d) {
if (c) {
d = false;
} else {
x = '';
c = true;
continue;
}
x; // marker
}
}''';
CompilationUnit unit = await resolveSource(code);
DartType t = findMarkedIdentifier(code, unit, "; // marker").propagatedType;
expect(typeProvider.intType.isSubtypeOf(t), isTrue);
expect(typeProvider.stringType.isSubtypeOf(t), isTrue);
}
fail_mergePropagatedTypesAtJoinPoint_8() async {
// 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 = r'''
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
}
}
}''';
CompilationUnit unit = await resolveSource(code);
DartType t = findMarkedIdentifier(code, unit, "; // marker").propagatedType;
expect(typeProvider.intType.isSubtypeOf(t), isTrue);
expect(typeProvider.stringType.isSubtypeOf(t), isTrue);
}
fail_propagatedReturnType_functionExpression() async {
// TODO(scheglov) disabled because we don't resolve function expression
String code = r'''
main() {
var v = (() {return 42;})();
}''';
CompilationUnit unit = await resolveSource(code);
assertPropagatedAssignedType(
code, unit, typeProvider.dynamicType, typeProvider.intType);
}
test_as() async {
Source source = addSource(r'''
class A {
bool get g => true;
}
A f(var p) {
if ((p as A).g) {
return p;
} else {
return null;
}
}''');
CompilationUnit unit = await _computeResolvedUnit(source);
ClassDeclaration classA = unit.declarations[0] as ClassDeclaration;
InterfaceType typeA =
resolutionMap.elementDeclaredByClassDeclaration(classA).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;
expect(variableName.propagatedType, same(typeA));
}
test_assert() async {
Source source = addSource(r'''
class A {}
A f(var p) {
assert (p is A);
return p;
}''');
CompilationUnit unit = await _computeResolvedUnit(source);
ClassDeclaration classA = unit.declarations[0] as ClassDeclaration;
InterfaceType typeA =
resolutionMap.elementDeclaredByClassDeclaration(classA).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;
expect(variableName.propagatedType, same(typeA));
}
test_assignment() async {
Source source = addSource(r'''
f() {
var v;
v = 0;
return v;
}''');
CompilationUnit unit = await _computeResolvedUnit(source);
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;
expect(variableName.propagatedType, typeProvider.intType);
}
test_assignment_afterInitializer() async {
Source source = addSource(r'''
f() {
var v = 0;
v = 1.0;
return v;
}''');
CompilationUnit unit = await _computeResolvedUnit(source);
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;
expect(variableName.propagatedType, typeProvider.doubleType);
}
test_assignment_null() async {
String code = r'''
main() {
int v; // declare
v = null;
return v; // return
}''';
CompilationUnit unit;
{
Source source = addSource(code);
TestAnalysisResult analysisResult = await computeAnalysisResult(source);
assertNoErrors(source);
verify([source]);
unit = analysisResult.unit;
}
{
SimpleIdentifier identifier = EngineTestCase.findNode(
unit, code, "v; // declare", (node) => node is SimpleIdentifier);
expect(identifier.staticType, typeProvider.intType);
expect(identifier.propagatedType, isNull);
}
{
SimpleIdentifier identifier = EngineTestCase.findNode(
unit, code, "v = null;", (node) => node is SimpleIdentifier);
expect(identifier.staticType, typeProvider.intType);
expect(identifier.propagatedType, isNull);
}
{
SimpleIdentifier identifier = EngineTestCase.findNode(
unit, code, "v; // return", (node) => node is SimpleIdentifier);
expect(identifier.staticType, typeProvider.intType);
expect(identifier.propagatedType, isNull);
}
}
test_assignment_throwExpression() async {
Source source = addSource(r'''
f() {
var v = 1;
v = throw 2;
return v;
}''');
CompilationUnit unit = await _computeResolvedUnit(source, noErrors: false);
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;
expect(variableName.propagatedType, typeProvider.intType);
}
test_CanvasElement_getContext() async {
String code = r'''
import 'dart:html';
main(CanvasElement canvas) {
var context = canvas.getContext('2d');
}''';
Source source = addSource(code);
CompilationUnit unit = await _computeResolvedUnit(source);
SimpleIdentifier identifier = EngineTestCase.findNode(
unit, code, "context", (node) => node is SimpleIdentifier);
expect(resolutionMap.propagatedTypeForExpression(identifier).name,
"CanvasRenderingContext2D");
}
test_forEach() async {
String code = r'''
main() {
var list = <String> [];
for (var e in list) {
e;
}
}''';
Source source = addSource(code);
CompilationUnit unit = await _computeResolvedUnit(source);
// in the declaration
{
SimpleIdentifier identifier = EngineTestCase.findNode(
unit, code, "e in", (node) => node is SimpleIdentifier);
expect(identifier.propagatedType, typeProvider.stringType);
}
// in the loop body
{
SimpleIdentifier identifier = EngineTestCase.findNode(
unit, code, "e;", (node) => node is SimpleIdentifier);
expect(identifier.propagatedType, typeProvider.stringType);
}
}
test_forEach_async() async {
String code = r'''
import 'dart:async';
f(Stream<String> stream) async {
await for (var e in stream) {
e;
}
}''';
Source source = addSource(code);
CompilationUnit unit = await _computeResolvedUnit(source);
// in the declaration
{
SimpleIdentifier identifier = EngineTestCase.findNode(
unit, code, "e in", (node) => node is SimpleIdentifier);
expect(identifier.propagatedType, typeProvider.stringType);
}
// in the loop body
{
SimpleIdentifier identifier = EngineTestCase.findNode(
unit, code, "e;", (node) => node is SimpleIdentifier);
expect(identifier.propagatedType, typeProvider.stringType);
}
}
test_forEach_async_inheritedStream() async {
// From https://github.com/dart-lang/sdk/issues/24191, this ensures that
// `await for` works for types where the generic parameter doesn't
// correspond to the type of the Stream's data.
String code = r'''
import 'dart:async';
abstract class MyCustomStream<T> implements Stream<List<T>> {}
f(MyCustomStream<String> stream) async {
await for (var e in stream) {
e;
}
}''';
Source source = addSource(code);
CompilationUnit unit = await _computeResolvedUnit(source);
InterfaceType listOfStringType =
typeProvider.listType.instantiate([typeProvider.stringType]);
// in the declaration
{
SimpleIdentifier identifier = EngineTestCase.findNode(
unit, code, "e in", (node) => node is SimpleIdentifier);
expect(identifier.propagatedType, equals(listOfStringType));
}
// in the loop body
{
SimpleIdentifier identifier = EngineTestCase.findNode(
unit, code, "e;", (node) => node is SimpleIdentifier);
expect(identifier.propagatedType, equals(listOfStringType));
}
}
test_functionExpression_asInvocationArgument() async {
String code = r'''
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);
CompilationUnit unit = await _computeResolvedUnit(source);
// k
FormalParameter kParameter = EngineTestCase.findNode(
unit, code, "k, ", (node) => node is SimpleFormalParameter);
expect(kParameter.identifier.propagatedType, typeProvider.intType);
SimpleIdentifier kIdentifier = EngineTestCase.findNode(
unit, code, "k;", (node) => node is SimpleIdentifier);
expect(kIdentifier.propagatedType, typeProvider.intType);
expect(kIdentifier.staticType, typeProvider.dynamicType);
// v
FormalParameter vParameter = EngineTestCase.findNode(
unit, code, "v)", (node) => node is SimpleFormalParameter);
expect(vParameter.identifier.propagatedType, typeProvider.stringType);
SimpleIdentifier vIdentifier = EngineTestCase.findNode(
unit, code, "v;", (node) => node is SimpleIdentifier);
expect(vIdentifier.propagatedType, typeProvider.stringType);
expect(vIdentifier.staticType, typeProvider.dynamicType);
}
test_functionExpression_asInvocationArgument_fromInferredInvocation() async {
String code = r'''
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);
CompilationUnit unit = await _computeResolvedUnit(source);
// k
FormalParameter kParameter = EngineTestCase.findNode(
unit, code, "k, ", (node) => node is SimpleFormalParameter);
expect(kParameter.identifier.propagatedType, typeProvider.intType);
// v
FormalParameter vParameter = EngineTestCase.findNode(
unit, code, "v)", (node) => node is SimpleFormalParameter);
expect(vParameter.identifier.propagatedType, typeProvider.stringType);
}
test_functionExpression_asInvocationArgument_functionExpressionInvocation() async {
String code = r'''
main() {
(f(String value)) {} ((v) {
v;
});
}''';
Source source = addSource(code);
CompilationUnit unit = await _computeResolvedUnit(source);
// v
FormalParameter vParameter = EngineTestCase.findNode(
unit, code, "v)", (node) => node is FormalParameter);
expect(vParameter.identifier.propagatedType, typeProvider.stringType);
expect(vParameter.identifier.staticType, typeProvider.dynamicType);
SimpleIdentifier vIdentifier = EngineTestCase.findNode(
unit, code, "v;", (node) => node is SimpleIdentifier);
expect(vIdentifier.propagatedType, typeProvider.stringType);
expect(vIdentifier.staticType, typeProvider.dynamicType);
}
test_functionExpression_asInvocationArgument_keepIfLessSpecific() async {
String code = r'''
class MyList {
forEach(f(Object value)) {}
}
f(MyList list) {
list.forEach((int v) {
v;
});
}''';
Source source = addSource(code);
CompilationUnit unit = await _computeResolvedUnit(source);
// v
FormalParameter vParameter = EngineTestCase.findNode(
unit, code, "v)", (node) => node is SimpleFormalParameter);
expect(vParameter.identifier.propagatedType, isNull);
expect(vParameter.identifier.staticType, typeProvider.intType);
SimpleIdentifier vIdentifier = EngineTestCase.findNode(
unit, code, "v;", (node) => node is SimpleIdentifier);
expect(vIdentifier.staticType, typeProvider.intType);
expect(vIdentifier.propagatedType, isNull);
}
test_functionExpression_asInvocationArgument_notSubtypeOfStaticType() async {
String code = r'''
class A {
m(void f(int i)) {}
}
x() {
A a = new A();
a.m(() => 0);
}''';
Source source = addSource(code);
CompilationUnit unit = await _computeResolvedUnit(source, noErrors: false);
assertErrors(source, [StaticWarningCode.ARGUMENT_TYPE_NOT_ASSIGNABLE]);
// () => 0
FunctionExpression functionExpression = EngineTestCase.findNode(
unit, code, "() => 0)", (node) => node is FunctionExpression);
expect((functionExpression.staticType as FunctionType).parameters.length,
same(0));
expect(functionExpression.propagatedType, isNull);
}
test_functionExpression_asInvocationArgument_replaceIfMoreSpecific() async {
String code = r'''
class MyList<E> {
forEach(f(E value)) {}
}
f(MyList<String> list) {
list.forEach((Object v) {
v;
});
}''';
Source source = addSource(code);
CompilationUnit unit = await _computeResolvedUnit(source);
// v
FormalParameter vParameter = EngineTestCase.findNode(
unit, code, "v)", (node) => node is SimpleFormalParameter);
expect(vParameter.identifier.propagatedType, typeProvider.stringType);
expect(vParameter.identifier.staticType, typeProvider.objectType);
SimpleIdentifier vIdentifier = EngineTestCase.findNode(
unit, code, "v;", (node) => node is SimpleIdentifier);
expect(vIdentifier.propagatedType, typeProvider.stringType);
}
test_Future_then() async {
String code = r'''
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);
CompilationUnit unit = await _computeResolvedUnit(source);
// p1
FormalParameter p1 = EngineTestCase.findNode(
unit, code, "p1) {", (node) => node is SimpleFormalParameter);
expect(p1.identifier.propagatedType, typeProvider.intType);
// p2
FormalParameter p2 = EngineTestCase.findNode(
unit, code, "p2) {", (node) => node is SimpleFormalParameter);
expect(p2.identifier.propagatedType, typeProvider.doubleType);
// p3
FormalParameter p3 = EngineTestCase.findNode(
unit, code, "p3) {", (node) => node is SimpleFormalParameter);
expect(p3.identifier.propagatedType, typeProvider.stringType);
}
test_initializer() async {
Source source = addSource(r'''
f() {
var v = 0;
return v;
}''');
CompilationUnit unit = await _computeResolvedUnit(source);
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;
expect(variableName.staticType, typeProvider.dynamicType);
expect(variableName.propagatedType, typeProvider.intType);
}
// Type of 'v' in reference.
{
ReturnStatement statement = statements[1] as ReturnStatement;
SimpleIdentifier variableName = statement.expression as SimpleIdentifier;
expect(variableName.propagatedType, typeProvider.intType);
}
}
test_initializer_dereference() async {
Source source = addSource(r'''
f() {
var v = 'String';
v.
}''');
CompilationUnit unit = await _computeResolvedUnit(source, noErrors: false);
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;
expect(variableName.propagatedType, typeProvider.stringType);
}
test_initializer_hasStaticType() async {
Source source = addSource(r'''
f() {
int v = 0;
return v;
}''');
CompilationUnit unit = await _computeResolvedUnit(source);
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;
expect(variableName.staticType, typeProvider.intType);
expect(variableName.propagatedType, isNull);
}
// Type of 'v' in reference.
{
ReturnStatement statement = statements[1] as ReturnStatement;
SimpleIdentifier variableName = statement.expression as SimpleIdentifier;
expect(variableName.staticType, typeProvider.intType);
expect(variableName.propagatedType, isNull);
}
}
test_initializer_hasStaticType_parameterized() async {
Source source = addSource(r'''
f() {
List<int> v = <int>[];
return v;
}''');
CompilationUnit unit = await _computeResolvedUnit(source);
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;
expect(variableName.staticType, isNotNull);
expect(variableName.propagatedType, isNull);
}
// Type of 'v' in reference.
{
ReturnStatement statement = statements[1] as ReturnStatement;
SimpleIdentifier variableName = statement.expression as SimpleIdentifier;
expect(variableName.staticType, isNotNull);
expect(variableName.propagatedType, isNull);
}
}
test_initializer_null() async {
String code = r'''
main() {
int v = null;
return v; // marker
}''';
CompilationUnit unit;
{
Source source = addSource(code);
unit = await _computeResolvedUnit(source);
}
{
SimpleIdentifier identifier = EngineTestCase.findNode(
unit, code, "v = null;", (node) => node is SimpleIdentifier);
expect(identifier.staticType, typeProvider.intType);
expect(identifier.propagatedType, isNull);
}
{
SimpleIdentifier identifier = EngineTestCase.findNode(
unit, code, "v; // marker", (node) => node is SimpleIdentifier);
expect(identifier.staticType, typeProvider.intType);
expect(identifier.propagatedType, isNull);
}
}
test_initializer_throwExpression() async {
Source source = addSource(r'''
f() {
var v = throw 2;
return v;
}''');
CompilationUnit unit = await _computeResolvedUnit(source, noErrors: false);
FunctionDeclaration function = unit.declarations[0] as FunctionDeclaration;
BlockFunctionBody body =
function.functionExpression.body as BlockFunctionBody;
var statement = body.block.statements[0] as VariableDeclarationStatement;
SimpleIdentifier variableName = statement.variables.variables[0].name;
expect(variableName.propagatedType, isNull);
}
test_invocation_target_prefixed() async {
addNamedSource(
'/helper.dart',
'''
library helper;
int max(int x, int y) => 0;
''');
String code = '''
import 'helper.dart' as helper;
main() {
helper.max(10, 10); // marker
}''';
CompilationUnit unit = await resolveSource(code);
SimpleIdentifier methodName =
findMarkedIdentifier(code, unit, "(10, 10); // marker");
MethodInvocation methodInvoke = methodName.parent;
expect(methodInvoke.methodName.staticElement, isNotNull);
expect(methodInvoke.methodName.propagatedElement, isNull);
}
test_is_conditional() async {
Source source = addSource(r'''
class A {}
A f(var p) {
return (p is A) ? p : null;
}''');
CompilationUnit unit = await _computeResolvedUnit(source);
ClassDeclaration classA = unit.declarations[0] as ClassDeclaration;
InterfaceType typeA =
resolutionMap.elementDeclaredByClassDeclaration(classA).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;
expect(variableName.propagatedType, same(typeA));
}
test_is_if() async {
Source source = addSource(r'''
class A {}
A f(var p) {
if (p is A) {
return p;
} else {
return null;
}
}''');
CompilationUnit unit = await _computeResolvedUnit(source);
// prepare A
InterfaceType typeA;
{
ClassDeclaration classA = unit.declarations[0] as ClassDeclaration;
typeA = resolutionMap.elementDeclaredByClassDeclaration(classA).type;
}
// verify "f"
FunctionDeclaration function = unit.declarations[1] as FunctionDeclaration;
BlockFunctionBody body =
function.functionExpression.body as BlockFunctionBody;
IfStatement ifStatement = body.block.statements[0] as IfStatement;
// "p is A"
{
IsExpression isExpression = ifStatement.condition;
SimpleIdentifier variableName = isExpression.expression;
expect(variableName.propagatedType, isNull);
}
// "return p;"
{
ReturnStatement statement =
(ifStatement.thenStatement as Block).statements[0] as ReturnStatement;
SimpleIdentifier variableName = statement.expression as SimpleIdentifier;
expect(variableName.propagatedType, same(typeA));
}
}
test_is_if_lessSpecific() async {
Source source = addSource(r'''
class A {}
A f(A p) {
if (p is String) {
return p;
} else {
return null;
}
}''');
CompilationUnit unit = await _computeResolvedUnit(source);
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;
expect(variableName.propagatedType, isNull);
}
test_is_if_logicalAnd() async {
Source source = addSource(r'''
class A {}
A f(var p) {
if (p is A && p != null) {
return p;
} else {
return null;
}
}''');
CompilationUnit unit = await _computeResolvedUnit(source);
ClassDeclaration classA = unit.declarations[0] as ClassDeclaration;
InterfaceType typeA =
resolutionMap.elementDeclaredByClassDeclaration(classA).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;
expect(variableName.propagatedType, same(typeA));
}
test_is_postConditional() async {
Source source = addSource(r'''
class A {}
A f(var p) {
A a = (p is A) ? p : throw null;
return p;
}''');
CompilationUnit unit = await _computeResolvedUnit(source);
ClassDeclaration classA = unit.declarations[0] as ClassDeclaration;
InterfaceType typeA =
resolutionMap.elementDeclaredByClassDeclaration(classA).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;
expect(variableName.propagatedType, same(typeA));
}
test_is_postIf() async {
Source source = addSource(r'''
class A {}
A f(var p) {
if (p is A) {
A a = p;
} else {
return null;
}
return p;
}''');
CompilationUnit unit = await _computeResolvedUnit(source);
ClassDeclaration classA = unit.declarations[0] as ClassDeclaration;
InterfaceType typeA =
resolutionMap.elementDeclaredByClassDeclaration(classA).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;
expect(variableName.propagatedType, same(typeA));
}
test_is_subclass() async {
Source source = addSource(r'''
class A {}
class B extends A {
B m() => this;
}
A f(A p) {
if (p is B) {
return p.m();
}
return p;
}''');
CompilationUnit unit = await _computeResolvedUnit(source);
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;
expect(invocation.methodName.staticElement, isNotNull);
expect(invocation.methodName.propagatedElement, isNull);
}
test_is_while() async {
Source source = addSource(r'''
class A {}
A f(var p) {
while (p is A) {
return p;
}
return p;
}''');
CompilationUnit unit = await _computeResolvedUnit(source);
ClassDeclaration classA = unit.declarations[0] as ClassDeclaration;
InterfaceType typeA =
resolutionMap.elementDeclaredByClassDeclaration(classA).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;
expect(variableName.propagatedType, same(typeA));
}
test_isNot_conditional() async {
Source source = addSource(r'''
class A {}
A f(var p) {
return (p is! A) ? null : p;
}''');
CompilationUnit unit = await _computeResolvedUnit(source);
ClassDeclaration classA = unit.declarations[0] as ClassDeclaration;
InterfaceType typeA =
resolutionMap.elementDeclaredByClassDeclaration(classA).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;
expect(variableName.propagatedType, same(typeA));
}
test_isNot_if() async {
Source source = addSource(r'''
class A {}
A f(var p) {
if (p is! A) {
return null;
} else {
return p;
}
}''');
CompilationUnit unit = await _computeResolvedUnit(source);
ClassDeclaration classA = unit.declarations[0] as ClassDeclaration;
InterfaceType typeA =
resolutionMap.elementDeclaredByClassDeclaration(classA).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;
expect(variableName.propagatedType, same(typeA));
}
test_isNot_if_logicalOr() async {
Source source = addSource(r'''
class A {}
A f(var p) {
if (p is! A || null == p) {
return null;
} else {
return p;
}
}''');
CompilationUnit unit = await _computeResolvedUnit(source, noErrors: false);
ClassDeclaration classA = unit.declarations[0] as ClassDeclaration;
InterfaceType typeA =
resolutionMap.elementDeclaredByClassDeclaration(classA).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;
expect(variableName.propagatedType, same(typeA));
}
test_isNot_postConditional() async {
Source source = addSource(r'''
class A {}
A f(var p) {
A a = (p is! A) ? throw null : p;
return p;
}''');
CompilationUnit unit = await _computeResolvedUnit(source);
ClassDeclaration classA = unit.declarations[0] as ClassDeclaration;
InterfaceType typeA =
resolutionMap.elementDeclaredByClassDeclaration(classA).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;
expect(variableName.propagatedType, same(typeA));
}
test_isNot_postIf() async {
Source source = addSource(r'''
class A {}
A f(var p) {
if (p is! A) {
return null;
}
return p;
}''');
CompilationUnit unit = await _computeResolvedUnit(source);
ClassDeclaration classA = unit.declarations[0] as ClassDeclaration;
InterfaceType typeA =
resolutionMap.elementDeclaredByClassDeclaration(classA).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;
expect(variableName.propagatedType, same(typeA));
}
test_issue20904BuggyTypePromotionAtIfJoin_5() async {
// 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 = r'''
class A {}
class B extends A {}
f() {
var a = new A();
var b = new B();
b; // B
if (a is B) {
return a; // marker
}
}''';
CompilationUnit unit = await resolveSource(code);
DartType tB = findMarkedIdentifier(code, unit, "; // B").propagatedType;
assertTypeOfMarkedExpression(code, unit, null, tB);
}
test_issue20904BuggyTypePromotionAtIfJoin_6() async {
// 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 = r'''
class A {}
class B extends A {}
f() {
var b = new B();
b; // B
if (b is A) {
return b; // marker
}
}''';
CompilationUnit unit = await resolveSource(code);
DartType tB = findMarkedIdentifier(code, unit, "; // B").propagatedType;
assertTypeOfMarkedExpression(code, unit, null, tB);
}
test_listLiteral_different() async {
Source source = addSource(r'''
f() {
var v = [0, '1', 2];
return v[2];
}''');
CompilationUnit unit = await _computeResolvedUnit(source);
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;
expect(indexExpression.propagatedType, isNull);
}
test_listLiteral_same() async {
Source source = addSource(r'''
f() {
var v = [0, 1, 2];
return v[2];
}''');
CompilationUnit unit = await _computeResolvedUnit(source);
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;
expect(indexExpression.propagatedType, isNull);
Expression v = indexExpression.target;
InterfaceType propagatedType = v.propagatedType as InterfaceType;
expect(propagatedType.element, typeProvider.listType.element);
List<DartType> typeArguments = propagatedType.typeArguments;
expect(typeArguments, hasLength(1));
expect(typeArguments[0], typeProvider.dynamicType);
}
test_mapLiteral_different() async {
Source source = addSource(r'''
f() {
var v = {'0' : 0, 1 : '1', '2' : 2};
return v;
}''');
CompilationUnit unit = await _computeResolvedUnit(source);
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;
expect(propagatedType.element, typeProvider.mapType.element);
List<DartType> typeArguments = propagatedType.typeArguments;
expect(typeArguments, hasLength(2));
expect(typeArguments[0], typeProvider.dynamicType);
expect(typeArguments[1], typeProvider.dynamicType);
}
test_mapLiteral_same() async {
Source source = addSource(r'''
f() {
var v = {'a' : 0, 'b' : 1, 'c' : 2};
return v;
}''');
CompilationUnit unit = await _computeResolvedUnit(source);
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;
expect(propagatedType.element, typeProvider.mapType.element);
List<DartType> typeArguments = propagatedType.typeArguments;
expect(typeArguments, hasLength(2));
expect(typeArguments[0], typeProvider.dynamicType);
expect(typeArguments[1], typeProvider.dynamicType);
}
test_mergePropagatedTypes_afterIfThen_different() async {
String code = r'''
main() {
var v = 0;
if (v != null) {
v = '';
}
return v;
}''';
CompilationUnit unit = await resolveSource(code);
{
SimpleIdentifier identifier = findMarkedIdentifier(code, unit, "v;");
expect(identifier.propagatedType, null);
}
{
SimpleIdentifier identifier = findMarkedIdentifier(code, unit, "v = '';");
expect(identifier.propagatedType, typeProvider.stringType);
}
}
test_mergePropagatedTypes_afterIfThen_same() async {
var code = r'''
main() {
var v = 1;
if (v != null) {
v = 2;
}
return v; // marker
}''';
CompilationUnit unit = await resolveSource(code);
assertTypeOfMarkedExpression(code, unit, null, typeProvider.intType);
}
test_mergePropagatedTypes_afterIfThenElse_different() async {
var code = r'''
main() {
var v = 1;
if (v != null) {
v = 2;
} else {
v = '3';
}
return v; // marker
}''';
CompilationUnit unit = await resolveSource(code);
assertTypeOfMarkedExpression(code, unit, null, null);
}
test_mergePropagatedTypes_afterIfThenElse_same() async {
var code = r'''
main() {
var v = 1;
if (v != null) {
v = 2;
} else {
v = 3;
}
return v; // marker
}''';
CompilationUnit unit = await resolveSource(code);
assertTypeOfMarkedExpression(code, unit, null, typeProvider.intType);
}
test_mergePropagatedTypesAtJoinPoint_4() async {
// https://code.google.com/p/dart/issues/detail?id=19929
var code = r'''
f5(x) {
var y = [];
if (x) {
y = 0;
} else {
return y;
}
// Propagated type is [int] here: correct.
return y; // marker
}''';
CompilationUnit unit = await resolveSource(code);
assertTypeOfMarkedExpression(code, unit, null, typeProvider.intType);
}
test_mutatedOutsideScope() async {
// https://code.google.com/p/dart/issues/detail?id=22732
Source source = addSource(r'''
class Base {
}
class Derived extends Base {
get y => null;
}
class C {
void f() {
Base x = null;
if (x is Derived) {
print(x.y); // BAD
}
x = null;
}
}
void g() {
Base x = null;
if (x is Derived) {
print(x.y); // GOOD
}
x = null;
}''');
await computeAnalysisResult(source);
assertNoErrors(source);
}
test_objectAccessInference_disabled_for_library_prefix() async {
String name = 'hashCode';
addNamedSource(
'/helper.dart',
'''
library helper;
dynamic get $name => 42;
''');
String code = '''
import 'helper.dart' as helper;
main() {
helper.$name; // marker
}''';
CompilationUnit unit = await resolveSource(code);
SimpleIdentifier id = findMarkedIdentifier(code, unit, "; // marker");
PrefixedIdentifier prefixedId = id.parent;
expect(id.staticType, typeProvider.dynamicType);
expect(prefixedId.staticType, typeProvider.dynamicType);
}
test_objectAccessInference_disabled_for_local_getter() async {
String name = 'hashCode';
String code = '''
dynamic get $name => null;
main() {
$name; // marker
}''';
CompilationUnit unit = await resolveSource(code);
SimpleIdentifier getter = findMarkedIdentifier(code, unit, "; // marker");
expect(getter.staticType, typeProvider.dynamicType);
}
test_objectAccessInference_enabled_for_cascades() async {
String name = 'hashCode';
String code = '''
main() {
dynamic obj;
obj..$name..$name; // marker
}''';
CompilationUnit unit = await resolveSource(code);
PropertyAccess access =
findMarkedIdentifier(code, unit, "; // marker").parent;
expect(access.staticType, typeProvider.dynamicType);
expect(access.realTarget.staticType, typeProvider.dynamicType);
}
test_objectMethodInference_disabled_for_library_prefix() async {
String name = 'toString';
addNamedSource(
'/helper.dart',
'''
library helper;
dynamic $name = (int x) => x + 42');
''');
String code = '''
import 'helper.dart' as helper;
main() {
helper.$name(); // marker
}''';
CompilationUnit unit = await resolveSource(code);
SimpleIdentifier methodName =
findMarkedIdentifier(code, unit, "(); // marker");
MethodInvocation methodInvoke = methodName.parent;
expect(methodName.staticType, typeProvider.dynamicType);
expect(methodInvoke.staticType, typeProvider.dynamicType);
}
test_objectMethodInference_disabled_for_local_function() async {
String name = 'toString';
String code = '''
main() {
dynamic $name = () => null;
$name(); // marker
}''';
CompilationUnit unit = await resolveSource(code);
SimpleIdentifier identifier = findMarkedIdentifier(code, unit, "$name = ");
expect(identifier.staticType, typeProvider.dynamicType);
SimpleIdentifier methodName =
findMarkedIdentifier(code, unit, "(); // marker");
MethodInvocation methodInvoke = methodName.parent;
expect(methodName.staticType, typeProvider.dynamicType);
expect(methodInvoke.staticType, typeProvider.dynamicType);
}
test_objectMethodInference_enabled_for_cascades() async {
String name = 'toString';
String code = '''
main() {
dynamic obj;
obj..$name()..$name(); // marker
}''';
CompilationUnit unit = await resolveSource(code);
SimpleIdentifier methodName =
findMarkedIdentifier(code, unit, "(); // marker");
MethodInvocation methodInvoke = methodName.parent;
expect(methodInvoke.staticType, typeProvider.dynamicType);
expect(methodInvoke.realTarget.staticType, typeProvider.dynamicType);
}
test_objectMethodOnDynamicExpression_doubleEquals() async {
// 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.
var code = r'''
f1(x) {
var v = (x == x);
return v; // marker
}''';
CompilationUnit unit = await resolveSource(code);
assertTypeOfMarkedExpression(code, unit, null, typeProvider.boolType);
}
test_objectMethodOnDynamicExpression_hashCode() async {
// https://code.google.com/p/dart/issues/detail?id=20342
var code = r'''
f1(x) {
var v = x.hashCode;
return v; // marker
}''';
CompilationUnit unit = await resolveSource(code);
assertTypeOfMarkedExpression(code, unit, null, typeProvider.intType);
}
test_objectMethodOnDynamicExpression_runtimeType() async {
// https://code.google.com/p/dart/issues/detail?id=20342
var code = r'''
f1(x) {
var v = x.runtimeType;
return v; // marker
}''';
CompilationUnit unit = await resolveSource(code);
assertTypeOfMarkedExpression(code, unit, null, typeProvider.typeType);
}
test_objectMethodOnDynamicExpression_toString() async {
// https://code.google.com/p/dart/issues/detail?id=20342
var code = r'''
f1(x) {
var v = x.toString();
return v; // marker
}''';
CompilationUnit unit = await resolveSource(code);
assertTypeOfMarkedExpression(code, unit, null, typeProvider.stringType);
}
test_propagatedReturnType_localFunction() async {
String code = r'''
main() {
f() => 42;
var v = f();
}''';
CompilationUnit unit = await resolveSource(code);
assertPropagatedAssignedType(
code, unit, typeProvider.dynamicType, typeProvider.intType);
}
test_query() async {
Source source = addSource(r'''
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];
}''');
CompilationUnit unit = await _computeResolvedUnit(source);
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;
expect(resolutionMap.propagatedTypeForExpression(elements[0]).name,
"AnchorElement");
expect(resolutionMap.propagatedTypeForExpression(elements[1]).name,
"AnchorElement");
expect(resolutionMap.propagatedTypeForExpression(elements[2]).name,
"BodyElement");
expect(resolutionMap.propagatedTypeForExpression(elements[3]).name,
"ButtonElement");
expect(resolutionMap.propagatedTypeForExpression(elements[4]).name,
"DivElement");
expect(resolutionMap.propagatedTypeForExpression(elements[5]).name,
"InputElement");
expect(resolutionMap.propagatedTypeForExpression(elements[6]).name,
"SelectElement");
expect(resolutionMap.propagatedTypeForExpression(elements[7]).name,
"DivElement");
expect(
resolutionMap.propagatedTypeForExpression(elements[8]).name, "Element");
expect(
resolutionMap.propagatedTypeForExpression(elements[9]).name, "Element");
expect(resolutionMap.propagatedTypeForExpression(elements[10]).name,
"Element");
}
/**
* Return the resolved unit for the given [source].
*
* If [noErrors] is not specified or is not `true`, [assertNoErrors].
*/
Future<CompilationUnit> _computeResolvedUnit(Source source,
{bool noErrors: true}) async {
TestAnalysisResult analysisResult = await computeAnalysisResult(source);
if (noErrors) {
assertNoErrors(source);
verify([source]);
}
return analysisResult.unit;
}
}
@reflectiveTest
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 futureType = _classElement("Future", objectType, ["T"]).type;
InterfaceType futureOrType =
_classElement("FutureOr", objectType, ["T"]).type;
InterfaceType intType = _classElement("int", numType).type;
InterfaceType iterableType =
_classElement("Iterable", objectType, ["T"]).type;
InterfaceType listType = _classElement("List", objectType, ["E"]).type;
InterfaceType mapType = _classElement("Map", objectType, ["K", "V"]).type;
InterfaceType stackTraceType = _classElement("StackTrace", objectType).type;
InterfaceType streamType = _classElement("Stream", objectType, ["T"]).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,
iterableType.element,
listType.element,
mapType.element,
objectType.element,
stackTraceType.element,
stringType.element,
symbolType.element,
typeType.element
];
CompilationUnitElementImpl asyncUnit =
new CompilationUnitElementImpl("async.dart");
asyncUnit.types = <ClassElement>[
futureType.element,
futureOrType.element,
streamType.element
];
AnalysisContext context = AnalysisEngine.instance.createAnalysisContext();
LibraryElementImpl coreLibrary = new LibraryElementImpl.forNode(
context, AstTestFactory.libraryIdentifier2(["dart.core"]));
coreLibrary.definingCompilationUnit = coreUnit;
LibraryElementImpl asyncLibrary = new LibraryElementImpl.forNode(
context, AstTestFactory.libraryIdentifier2(["dart.async"]));
asyncLibrary.definingCompilationUnit = asyncUnit;
//
// Create a type provider and ensure that it can return the expected types.
//
TypeProviderImpl provider = new TypeProviderImpl(coreLibrary, asyncLibrary);
expect(provider.boolType, same(boolType));
expect(provider.bottomType, isNotNull);
expect(provider.doubleType, same(doubleType));
expect(provider.dynamicType, isNotNull);
expect(provider.functionType, same(functionType));
expect(provider.futureType, same(futureType));
expect(provider.futureOrType, same(futureOrType));
expect(provider.intType, same(intType));
expect(provider.listType, same(listType));
expect(provider.mapType, same(mapType));
expect(provider.objectType, same(objectType));
expect(provider.stackTraceType, same(stackTraceType));
expect(provider.streamType, same(streamType));
expect(provider.stringType, same(stringType));
expect(provider.symbolType, same(symbolType));
expect(provider.typeType, same(typeType));
}
ClassElement _classElement(String typeName, InterfaceType superclassType,
[List<String> parameterNames]) {
ClassElementImpl element =
new ClassElementImpl.forNode(AstTestFactory.identifier3(typeName));
element.supertype = superclassType;
if (parameterNames != null) {
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(
AstTestFactory.identifier3(parameterNames[i]));
typeParameters[i] = typeParameter;
typeArguments[i] = new TypeParameterTypeImpl(typeParameter);
typeParameter.type = typeArguments[i];
}
element.typeParameters = typeParameters;
}
}
return element;
}
}
@reflectiveTest
class TypeResolverVisitorTest extends ParserTestCase {
/**
* The error listener to which errors will be reported.
*/
GatheringErrorListener _listener;
/**
* The type provider used to access the types.
*/
TestTypeProvider _typeProvider;
/**
* The library scope in which types are to be resolved.
*/
LibraryScope libraryScope;
/**
* The visitor used to resolve types needed to form the type hierarchy.
*/
TypeResolverVisitor _visitor;
fail_visitConstructorDeclaration() async {
fail("Not yet tested");
_listener.assertNoErrors();
}
fail_visitFunctionTypeAlias() async {
fail("Not yet tested");
_listener.assertNoErrors();
}
fail_visitVariableDeclaration() async {
fail("Not yet tested");
ClassElement type = ElementFactory.classElement2("A");
VariableDeclaration node = AstTestFactory.variableDeclaration("a");
AstTestFactory
.variableDeclarationList(null, AstTestFactory.typeName(type), [node]);
//resolve(node);
expect(node.name.staticType, same(type.type));
_listener.assertNoErrors();
}
void setUp() {
_listener = new GatheringErrorListener();
MemoryResourceProvider resourceProvider = new MemoryResourceProvider();
InternalAnalysisContext context = AnalysisContextFactory.contextWithCore(
resourceProvider: resourceProvider);
Source librarySource =
new FileSource(resourceProvider.getFile("/lib.dart"));
LibraryElementImpl element = new LibraryElementImpl.forNode(
context, AstTestFactory.libraryIdentifier2(["lib"]));
element.definingCompilationUnit =
new CompilationUnitElementImpl("lib.dart");
_typeProvider = new TestTypeProvider();
libraryScope = new LibraryScope(element);
_visitor = new TypeResolverVisitor(
element, librarySource, _typeProvider, _listener,
nameScope: libraryScope);
}
test_modeApi() async {
CompilationUnit unit = parseCompilationUnit(r'''
class C extends A with A implements A {
A f = new A();
A m() {
A v1;
}
}
A f([A p = const A()]) {
A v2;
}
A V = new A();
''');
var unitElement = new CompilationUnitElementImpl('/test.dart');
ClassElementImpl A = ElementFactory.classElement2('A');
// Build API elements.
{
var holder = new ElementHolder();
unit.accept(new ApiElementBuilder(holder, unitElement));
}
// Resolve API types.
{
MemoryResourceProvider resourceProvider = new MemoryResourceProvider();
InternalAnalysisContext context = AnalysisContextFactory.contextWithCore(
resourceProvider: resourceProvider);
var source = resourceProvider.getFile('/test.dart').createSource();
var libraryElement = new LibraryElementImpl.forNode(context, null)
..definingCompilationUnit = unitElement;
var libraryScope = new LibraryScope(libraryElement);
var visitor = new TypeResolverVisitor(
libraryElement, source, _typeProvider, _listener,
nameScope: libraryScope, mode: TypeResolverMode.api);
libraryScope.define(A);
unit.accept(visitor);
}
// Top-level: C
{
var c = unit.declarations[0] as ClassDeclaration;
// The extends/with/implements types are resolved.
expect(c.extendsClause.superclass.toString(), 'A');
expect(c.withClause.mixinTypes[0].type.toString(), 'A');
expect(c.implementsClause.interfaces[0].type.toString(), 'A');
{
var fd = c.members[0] as FieldDeclaration;
// The field type is resolved.
expect(fd.fields.type.type.toString(), 'A');
// The type in the initializer is not resolved.
var f = fd.fields.variables[0];
var fi = f.initializer as InstanceCreationExpression;
expect(fi.constructorName.type.type, isNull);
}
{
var m = c.members[1] as MethodDeclaration;
// The return type is resolved.
expect(m.returnType.type.toString(), 'A');
// The local variable type is not resolved.
var body = m.body as BlockFunctionBody;
var vd = body.block.statements.single as VariableDeclarationStatement;
expect(vd.variables.type.type, isNull);
}
}
// Top-level: f
{
var f = unit.declarations[1] as FunctionDeclaration;
FunctionExpression fe = f.functionExpression;
// The return type is resolved.
expect(f.returnType.type.toString(), 'A');
// The parameter type is resolved.
var pd = fe.parameters.parameters[0] as DefaultFormalParameter;
var p = pd.parameter as SimpleFormalParameter;
expect(p.type.type.toString(), 'A');
// The parameter default is not resolved.
{
var pde = pd.defaultValue as InstanceCreationExpression;
expect(pde.constructorName.type.type, isNull);
}
// The local variable type is not resolved.
var body = fe.body as BlockFunctionBody;
var vd = body.block.statements.single as VariableDeclarationStatement;
expect(vd.variables.type.type, isNull);
}
// Top-level: V
{
var vd = unit.declarations[2] as TopLevelVariableDeclaration;
// The type is resolved.
expect(vd.variables.type.toString(), 'A');
// The initializer is not resolved.
VariableDeclaration v = vd.variables.variables[0];
var vi = v.initializer as InstanceCreationExpression;
expect(vi.constructorName.type.type, isNull);
}
}
test_modeLocal_noContext() async {
CompilationUnit unit;
_resolveTypeModeLocal(
r'''
class C {
A f = new A();
A m([A p = const A()]) {
A v;
}
}
A f([A p = const A()]) {
A v1 = new A();
A f2(A p2) {
A v2;
}
}
A V = new A();
A get G => new A();
''', (CompilationUnit u) {
unit = u;
return u;
});
// Top-level: C
{
var c = unit.declarations[0] as ClassDeclaration;
{
var fd = c.members[0] as FieldDeclaration;
// The type of "f" is not resolved.
expect(fd.fields.type.type, isNull);
// The initializer of "f" is resolved.
var f = fd.fields.variables[0];
var fi = f.initializer as InstanceCreationExpression;
expect(fi.constructorName.type.type.toString(), 'A');
}
{
var m = c.members[1] as MethodDeclaration;
// The return type of "m" is not resolved.
expect(m.returnType.type, isNull);
// The type of the parameter "p" is not resolved.
var pd = m.parameters.parameters[0] as DefaultFormalParameter;
var p = pd.parameter as SimpleFormalParameter;
expect(p.type.type, isNull);
// The default value of the parameter "p" is resolved.
var pdd = pd.defaultValue as InstanceCreationExpression;
expect(pdd.constructorName.type.type.toString(), 'A');
// The type of "v" is resolved.
var mb = m.body as BlockFunctionBody;
var vd = mb.block.statements[0] as VariableDeclarationStatement;
expect(vd.variables.type.type.toString(), 'A');
}
}
// Top-level: f
{
var f = unit.declarations[1] as FunctionDeclaration;
// The return type of "f" is not resolved.
expect(f.returnType.type, isNull);
// The type of the parameter "p" is not resolved.
var fe = f.functionExpression;
var pd = fe.parameters.parameters[0] as DefaultFormalParameter;
var p = pd.parameter as SimpleFormalParameter;
expect(p.type.type, isNull);
// The default value of the parameter "p" is resolved.
var pdd = pd.defaultValue as InstanceCreationExpression;
expect(pdd.constructorName.type.type.toString(), 'A');
// The type of "v1" is resolved.
var fb = fe.body as BlockFunctionBody;
var vd = fb.block.statements[0] as VariableDeclarationStatement;
expect(vd.variables.type.type.toString(), 'A');
// The initializer of "v1" is resolved.
var v = vd.variables.variables[0];
var vi = v.initializer as InstanceCreationExpression;
expect(vi.constructorName.type.type.toString(), 'A');
// Local: f2
{
var f2s = fb.block.statements[1] as FunctionDeclarationStatement;
var f2 = f2s.functionDeclaration;
// The return type of "f2" is resolved.
expect(f2.returnType.type.toString(), 'A');
// The type of the parameter "p2" is resolved.
var f2e = f2.functionExpression;
var p2 = f2e.parameters.parameters[0] as SimpleFormalParameter;
expect(p2.type.type.toString(), 'A');
// The type of "v2" is resolved.
var f2b = f2e.body as BlockFunctionBody;
var v2d = f2b.block.statements[0] as VariableDeclarationStatement;
expect(v2d.variables.type.type.toString(), 'A');
}
}
// Top-level: V
{
var vd = unit.declarations[2] as TopLevelVariableDeclaration;
// The type is not resolved.
expect(vd.variables.type.type, isNull);
// The initializer is resolved.
VariableDeclaration v = vd.variables.variables[0];
var vi = v.initializer as InstanceCreationExpression;
expect(vi.constructorName.type.type.toString(), 'A');
}
// Top-level: G
{
var g = unit.declarations[3] as FunctionDeclaration;
// The return type is not resolved.
expect(g.returnType.type, isNull);
// The body is resolved.
var gb = g.functionExpression.body as ExpressionFunctionBody;
var ge = gb.expression as InstanceCreationExpression;
expect(ge.constructorName.type.type.toString(), 'A');
}
}
test_modeLocal_withContext_bad_methodBody() async {
expect(() {
_resolveTypeModeLocal(
r'''
class C<T1> {
A m<T2>() {
T1 v1;
T2 v2;
}
}
''', (CompilationUnit u) {
var c = u.declarations[0] as ClassDeclaration;
var m = c.members[0] as MethodDeclaration;
var mb = m.body as BlockFunctionBody;
return mb;
});
}, throwsStateError);
}
test_modeLocal_withContext_bad_topLevelVariable_declaration() async {
expect(() {
_resolveTypeModeLocal(
r'''
var v = new A();
''', (CompilationUnit u) {
var tlv = u.declarations[0] as TopLevelVariableDeclaration;
return tlv.variables.variables[0];
});
}, throwsStateError);
}
test_modeLocal_withContext_bad_topLevelVariable_initializer() async {
expect(() {
_resolveTypeModeLocal(
r'''
var v = new A();
''', (CompilationUnit u) {
var tlv = u.declarations[0] as TopLevelVariableDeclaration;
return tlv.variables.variables[0].initializer;
});
}, throwsStateError);
}
test_modeLocal_withContext_class() async {
ClassDeclaration c;
_resolveTypeModeLocal(
r'''
class C<T1> {
A m<T2>() {
T1 v1;
T2 v2;
}
}
''', (CompilationUnit u) {
c = u.declarations[0] as ClassDeclaration;
return c;
});
var m = c.members[0] as MethodDeclaration;
// The return type of "m" is not resolved.
expect(m.returnType.type, isNull);
var mb = m.body as BlockFunctionBody;
var ms = mb.block.statements;
// The type of "v1" is resolved.
{
var vd = ms[0] as VariableDeclarationStatement;
expect(vd.variables.type.type.toString(), 'T1');
}
// The type of "v2" is resolved.
{
var vd = ms[1] as VariableDeclarationStatement;
expect(vd.variables.type.type.toString(), 'T2');
}
}
test_modeLocal_withContext_inClass_constructor() async {
ConstructorDeclaration cc;
_resolveTypeModeLocal(
r'''
class C<T> {
C() {
T v1;
}
}
''', (CompilationUnit u) {
var c = u.declarations[0] as ClassDeclaration;
cc = c.members[0] as ConstructorDeclaration;
return cc;
});
var ccb = cc.body as BlockFunctionBody;
var ccs = ccb.block.statements;
// The type of "v" is resolved.
{
var vd = ccs[0] as VariableDeclarationStatement;
expect(vd.variables.type.type.toString(), 'T');
}
}
test_modeLocal_withContext_inClass_method() async {
MethodDeclaration m;
_resolveTypeModeLocal(
r'''
class C<T1> {
A m<T2>() {
T1 v1;
T2 v2;
}
}
''', (CompilationUnit u) {
var c = u.declarations[0] as ClassDeclaration;
m = c.members[0] as MethodDeclaration;
return m;
});
// The return type of "m" is not resolved.
expect(m.returnType.type, isNull);
var mb = m.body as BlockFunctionBody;
var ms = mb.block.statements;
// The type of "v1" is resolved.
{
var vd = ms[0] as VariableDeclarationStatement;
expect(vd.variables.type.type.toString(), 'T1');
}
// The type of "v2" is resolved.
{
var vd = ms[1] as VariableDeclarationStatement;
expect(vd.variables.type.type.toString(), 'T2');
}
}
test_modeLocal_withContext_topLevelFunction() async {
FunctionDeclaration f;
_resolveTypeModeLocal(
r'''
A m<T>() {
T v;
}
''', (CompilationUnit u) {
f = u.declarations[0] as FunctionDeclaration;
return f;
});
// The return type of "f" is not resolved.
expect(f.returnType.type, isNull);
var fb = f.functionExpression.body as BlockFunctionBody;
var fs = fb.block.statements;
// The type of "v" is resolved.
var vd = fs[0] as VariableDeclarationStatement;
expect(vd.variables.type.type.toString(), 'T');
}
test_modeLocal_withContext_topLevelVariable() async {
TopLevelVariableDeclaration v;
_resolveTypeModeLocal(
r'''
A v = new A();
''', (CompilationUnit u) {
v = u.declarations[0] as TopLevelVariableDeclaration;
return v;
});
// The type of "v" is not resolved.
expect(v.variables.type.type, isNull);
// The type of "v" initializer is resolved.
var vi = v.variables.variables[0].initializer as InstanceCreationExpression;
expect(vi.constructorName.type.type.toString(), 'A');
}
test_visitCatchClause_exception() async {
// catch (e)
CatchClause clause = AstTestFactory.catchClause("e");
SimpleIdentifier exceptionParameter = clause.exceptionParameter;
exceptionParameter.staticElement =
new LocalVariableElementImpl.forNode(exceptionParameter);
_resolveCatchClause(clause, _typeProvider.dynamicType, null);
_listener.assertNoErrors();
}
test_visitCatchClause_exception_stackTrace() async {
// catch (e, s)
CatchClause clause = AstTestFactory.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();
}
test_visitCatchClause_on_exception() async {
// on E catch (e)
ClassElement exceptionElement = ElementFactory.classElement2("E");
TypeName exceptionType = AstTestFactory.typeName(exceptionElement);
CatchClause clause = AstTestFactory.catchClause4(exceptionType, "e");
SimpleIdentifier exceptionParameter = clause.exceptionParameter;
exceptionParameter.staticElement =
new LocalVariableElementImpl.forNode(exceptionParameter);
_resolveCatchClause(
clause, exceptionElement.type, null, [exceptionElement]);
_listener.assertNoErrors();
}
test_visitCatchClause_on_exception_stackTrace() async {
// on E catch (e, s)
ClassElement exceptionElement = ElementFactory.classElement2("E");
TypeName exceptionType = AstTestFactory.typeName(exceptionElement);
(exceptionType.name as SimpleIdentifier).staticElement = exceptionElement;
CatchClause clause = AstTestFactory.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();
}
test_visitClassDeclaration() async {
// 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 =
AstTestFactory.extendsClause(AstTestFactory.typeName(elementB));
WithClause withClause =
AstTestFactory.withClause([AstTestFactory.typeName(elementC)]);
ImplementsClause implementsClause =
AstTestFactory.implementsClause([AstTestFactory.typeName(elementD)]);
ClassDeclaration declaration = AstTestFactory.classDeclaration(
null, "A", null, extendsClause, withClause, implementsClause);
declaration.name.staticElement = elementA;
_resolveNode(declaration, [elementA, elementB, elementC, elementD]);
expect(elementA.supertype, same(elementB.type));
List<InterfaceType> mixins = elementA.mixins;
expect(mixins, hasLength(1));
expect(mixins[0], same(elementC.type));
List<InterfaceType> interfaces = elementA.interfaces;
expect(interfaces, hasLength(1));
expect(interfaces[0], same(elementD.type));
_listener.assertNoErrors();
}
test_visitClassDeclaration_instanceMemberCollidesWithClass() async {
// 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 =
AstTestFactory.extendsClause(AstTestFactory.typeName(elementA));
ClassDeclaration declaration = AstTestFactory.classDeclaration(
null, "B", null, extendsClause, null, null);
declaration.name.staticElement = elementB;
_resolveNode(declaration, [elementA