pkg/analysis_server/test/services/correction/fix_test.dart

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

import 'dart:async';

import 'package:analysis_server/plugin/edit/fix/fix_core.dart';
import 'package:analysis_server/plugin/edit/fix/fix_dart.dart';
import 'package:analysis_server/src/services/correction/fix.dart';
import 'package:analysis_server/src/services/correction/fix_internal.dart';
import 'package:analyzer/dart/ast/ast.dart';
import 'package:analyzer/dart/ast/standard_resolution_map.dart';
import 'package:analyzer/error/error.dart';
import 'package:analyzer/file_system/file_system.dart';
import 'package:analyzer/src/dart/analysis/ast_provider_driver.dart';
import 'package:analyzer/src/dart/analysis/driver.dart';
import 'package:analyzer/src/dart/element/ast_provider.dart';
import 'package:analyzer/src/error/codes.dart';
import 'package:analyzer/src/generated/parser.dart';
import 'package:analyzer/src/generated/source.dart';
import 'package:analyzer/src/source/package_map_resolver.dart';
import 'package:analyzer_plugin/protocol/protocol_common.dart'
    hide AnalysisError;
import 'package:analyzer_plugin/utilities/fixes/fixes.dart';
import 'package:test/test.dart';
import 'package:test_reflective_loader/test_reflective_loader.dart';

import '../../abstract_single_unit.dart';

main() {
  defineReflectiveSuite(() {
    defineReflectiveTests(FixProcessorTest);
    defineReflectiveTests(LintFixTest);
  });
}

typedef bool AnalysisErrorFilter(AnalysisError error);

/**
 * Base class for fix processor tests.
 */
class BaseFixProcessorTest extends AbstractSingleUnitTest {
  AnalysisErrorFilter errorFilter = (AnalysisError error) {
    return error.errorCode != HintCode.UNUSED_CATCH_CLAUSE &&
        error.errorCode != HintCode.UNUSED_CATCH_STACK &&
        error.errorCode != HintCode.UNUSED_ELEMENT &&
        error.errorCode != HintCode.UNUSED_FIELD &&
        error.errorCode != HintCode.UNUSED_LOCAL_VARIABLE;
  };

  String myPkgLibPath = '/packages/my_pkg/lib';

  String flutterPkgLibPath = '/packages/flutter/lib';

  Fix fix;

  SourceChange change;
  String resultCode;

  assert_undefinedFunction_create_returnType_bool(String lineWithTest) async {
    await resolveTestUnit('''
main() {
  bool b = true;
  $lineWithTest
}
''');
    await assertHasFix(DartFixKind.CREATE_FUNCTION, '''
main() {
  bool b = true;
  $lineWithTest
}

bool test() {
}
''');
  }

  assertHasFix(FixKind kind, String expected, {String target}) async {
    AnalysisError error = await _findErrorToFix();
    fix = await _assertHasFix(kind, error);
    change = fix.change;

    // apply to "file"
    List<SourceFileEdit> fileEdits = change.edits;
    expect(fileEdits, hasLength(1));

    String fileContent = testCode;
    if (target != null) {
      expect(fileEdits.first.file, convertPath(target));
      fileContent = getFile(target).readAsStringSync();
    }

    resultCode = SourceEdit.applySequence(fileContent, change.edits[0].edits);
    // verify
    expect(resultCode, expected);
  }

  assertHasFixAllFix(ErrorCode errorCode, FixKind kind, String expected,
      {String target}) async {
    AnalysisError error = await _findErrorToFixOfType(errorCode);
    fix = await _assertHasFix(kind, error, hasFixAllFix: true);
    change = fix.change;

    // apply to "file"
    List<SourceFileEdit> fileEdits = change.edits;
    expect(fileEdits, hasLength(1));

    String fileContent = testCode;
    if (target != null) {
      expect(fileEdits.first.file, convertPath(target));
      fileContent = getFile(target).readAsStringSync();
    }

    resultCode = SourceEdit.applySequence(fileContent, change.edits[0].edits);
    // verify
    expect(resultCode, expected);
  }

  assertNoFix(FixKind kind) async {
    AnalysisError error = await _findErrorToFix();
    await _assertNoFix(kind, error);
  }

  List<LinkedEditSuggestion> expectedSuggestions(
      LinkedEditSuggestionKind kind, List<String> values) {
    return values.map((value) {
      return new LinkedEditSuggestion(value, kind);
    }).toList();
  }

  void setUp() {
    super.setUp();
    verifyNoTestUnitErrors = false;
  }

  /**
   * Computes fixes and verifies that there is a fix of the given kind.
   */
  Future<Fix> _assertHasFix(FixKind kind, AnalysisError error,
      {bool hasFixAllFix: false}) async {
    if (hasFixAllFix && !kind.canBeAppliedTogether()) {
      fail('Expected to find and return fix-all FixKind for $kind, '
          'but kind.canBeAppliedTogether is ${kind.canBeAppliedTogether}');
    }

    // Compute the fixes for this AnalysisError
    final List<Fix> fixes = await _computeFixes(error);

    // If hasFixAllFix is false, assert that none of the fixes are a fix-all fix
    if (!hasFixAllFix) {
      for (Fix fix in fixes) {
        if (fix.isFixAllFix()) {
          fail('The boolean hasFixAllFix is false, but such a fix was found '
              'in the computed set of fixes: $fixes, error: $error.');
        }
      }
    }
    // If hasFixAllFix is true, assert that there exists such a fix in the list
    else {
      bool foundFixAllFix = false;
      for (Fix fix in fixes) {
        if (fix.isFixAllFix()) {
          foundFixAllFix = true;
          break;
        }
      }
      if (!foundFixAllFix) {
        fail('The boolean hasFixAllFix is true, but no fix-all fix was found '
            'in the computed set of fixes: $fixes, error: $error.');
      }
    }

    Fix foundFix = null;
    if (!hasFixAllFix) {
      foundFix = fixes.firstWhere(
        (fix) => fix.kind == kind && !fix.isFixAllFix(),
        orElse: () => null,
      );
    } else {
      foundFix = fixes.lastWhere(
        (fix) => fix.kind == kind && fix.isFixAllFix(),
        orElse: () => null,
      );
    }
    if (foundFix == null) {
      fail('Expected to find fix $kind in\n${fixes.join('\n')}, hasFixAllFix = '
          '$hasFixAllFix');
    }
    return foundFix;
  }

  void _assertLinkedGroup(LinkedEditGroup group, List<String> expectedStrings,
      [List<LinkedEditSuggestion> expectedSuggestions]) {
    List<Position> expectedPositions = _findResultPositions(expectedStrings);
    expect(group.positions, unorderedEquals(expectedPositions));
    if (expectedSuggestions != null) {
      expect(group.suggestions, unorderedEquals(expectedSuggestions));
    }
  }

  Future _assertNoFix(FixKind kind, AnalysisError error) async {
    List<Fix> fixes = await _computeFixes(error);
    for (Fix fix in fixes) {
      if (fix.kind == kind) {
        fail('Unexpected fix $kind in\n${fixes.join('\n')}');
      }
    }
  }

  Future<List<AnalysisError>> _computeErrors() async {
    return (await driver.getResult(convertPath(testFile))).errors;
  }

  /**
   * Computes fixes for the given [error] in [testUnit].
   */
  Future<List<Fix>> _computeFixes(AnalysisError error) async {
    DartFixContext fixContext = new _DartFixContextImpl(
        resourceProvider,
        driver,
        new AstProviderForDriver(driver),
        testUnit,
        error,
        await _computeErrors());
    return await new DefaultFixContributor().internalComputeFixes(fixContext);
  }

  /**
   * Configures the [SourceFactory] to have the `my_pkg` package in
   * `/packages/my_pkg/lib` folder.
   */
  void _configureMyPkg(Map<String, String> pathToCode) {
    pathToCode.forEach((path, code) {
      newFile('$myPkgLibPath/$path', content: code);
    });
    // configure SourceFactory
    Folder myPkgFolder = getFolder(myPkgLibPath);
    UriResolver pkgResolver = new PackageMapUriResolver(resourceProvider, {
      'my_pkg': [myPkgFolder]
    });
    SourceFactory sourceFactory = new SourceFactory(
        [new DartUriResolver(sdk), pkgResolver, resourceResolver]);
    driver.configure(sourceFactory: sourceFactory);
    // force 'my_pkg' resolution
    addSource(
        '/tmp/other.dart',
        pathToCode.keys
            .map((path) => "import 'package:my_pkg/$path';")
            .join('\n'));
  }

  Future<AnalysisError> _findErrorToFix() async {
    List<AnalysisError> errors = await _computeErrors();
    List<AnalysisError> filteredErrors = errors;
    if (errorFilter != null) {
      filteredErrors = filteredErrors.where(errorFilter).toList();
    }
    if (filteredErrors.length != 1) {
      StringBuffer buffer = new StringBuffer();
      buffer.writeln('Expected one error, found:');
      for (AnalysisError error in errors) {
        buffer.writeln('  $error [${error.errorCode}]');
      }
      fail(buffer.toString());
    }
    return filteredErrors[0];
  }

  Future<AnalysisError> _findErrorToFixOfType(ErrorCode errorCode) async {
    List<AnalysisError> errors = await _computeErrors();
    if (errorFilter != null) {
      errors = errors.where(errorFilter).toList();
    }
    return errors.firstWhere((error) => errorCode == error.errorCode);
  }

  List<Position> _findResultPositions(List<String> searchStrings) {
    List<Position> positions = <Position>[];
    for (String search in searchStrings) {
      int offset = resultCode.indexOf(search);
      positions.add(new Position(testFile, offset));
    }
    return positions;
  }
}

@reflectiveTest
class FixProcessorTest extends BaseFixProcessorTest {
  test_addAsync_asyncFor() async {
    await resolveTestUnit('''
import 'dart:async';
void main(Stream<String> names) {
  await for (String name in names) {
    print(name);
  }
}
''');
    await assertHasFix(DartFixKind.ADD_ASYNC, '''
import 'dart:async';
Future main(Stream<String> names) async {
  await for (String name in names) {
    print(name);
  }
}
''');
  }

  test_addAsync_BAD_nullFunctionBody() async {
    await resolveTestUnit('''
var F = await;
''');
    await assertNoFix(DartFixKind.ADD_ASYNC);
  }

  test_addAsync_blockFunctionBody() async {
    errorFilter = (AnalysisError error) {
      return error.errorCode ==
          CompileTimeErrorCode.BUILT_IN_IDENTIFIER_AS_TYPE;
    };
    await resolveTestUnit('''
foo() {}
main() {
  await foo();
}
''');
    await assertHasFix(DartFixKind.ADD_ASYNC, '''
foo() {}
main() async {
  await foo();
}
''');
  }

  test_addAsync_blockFunctionBody_getter() async {
    errorFilter = (AnalysisError error) {
      return error.errorCode ==
          CompileTimeErrorCode.BUILT_IN_IDENTIFIER_AS_TYPE;
    };
    await resolveTestUnit('''
int get foo => null;
int f() {
  await foo;
  return 1;
}
''');
    await assertHasFix(DartFixKind.ADD_ASYNC, '''
import \'dart:async\';

int get foo => null;
Future<int> f() async {
  await foo;
  return 1;
}
''');
  }

  test_addAsync_closure() async {
    errorFilter = (AnalysisError error) {
      return error.errorCode == StaticWarningCode.UNDEFINED_IDENTIFIER_AWAIT;
    };
    await resolveTestUnit('''
import 'dart:async';

void takeFutureCallback(Future callback()) {}

void doStuff() => takeFutureCallback(() => await 1);
''');
    await assertHasFix(DartFixKind.ADD_ASYNC, '''
import 'dart:async';

void takeFutureCallback(Future callback()) {}

void doStuff() => takeFutureCallback(() async => await 1);
''');
  }

  test_addAsync_expressionFunctionBody() async {
    errorFilter = (AnalysisError error) {
      return error.errorCode == ParserErrorCode.UNEXPECTED_TOKEN;
    };
    await resolveTestUnit('''
foo() {}
main() => await foo();
''');
    await assertHasFix(DartFixKind.ADD_ASYNC, '''
foo() {}
main() async => await foo();
''');
  }

  test_addAsync_returnFuture() async {
    errorFilter = (AnalysisError error) {
      return error.errorCode ==
          CompileTimeErrorCode.BUILT_IN_IDENTIFIER_AS_TYPE;
    };
    await resolveTestUnit('''
foo() {}
int main() {
  await foo();
  return 42;
}
''');
    await assertHasFix(DartFixKind.ADD_ASYNC, '''
import 'dart:async';

foo() {}
Future<int> main() async {
  await foo();
  return 42;
}
''');
  }

  test_addAsync_returnFuture_alreadyFuture() async {
    errorFilter = (AnalysisError error) {
      return error.errorCode ==
          CompileTimeErrorCode.BUILT_IN_IDENTIFIER_AS_TYPE;
    };
    await resolveTestUnit('''
import 'dart:async';
foo() {}
Future<int> main() {
  await foo();
  return 42;
}
''');
    await assertHasFix(DartFixKind.ADD_ASYNC, '''
import 'dart:async';
foo() {}
Future<int> main() async {
  await foo();
  return 42;
}
''');
  }

  test_addAsync_returnFuture_dynamic() async {
    errorFilter = (AnalysisError error) {
      return error.errorCode ==
          CompileTimeErrorCode.BUILT_IN_IDENTIFIER_AS_TYPE;
    };
    await resolveTestUnit('''
foo() {}
dynamic main() {
  await foo();
  return 42;
}
''');
    await assertHasFix(DartFixKind.ADD_ASYNC, '''
foo() {}
dynamic main() async {
  await foo();
  return 42;
}
''');
  }

  test_addAsync_returnFuture_noType() async {
    errorFilter = (AnalysisError error) {
      return error.errorCode ==
          CompileTimeErrorCode.BUILT_IN_IDENTIFIER_AS_TYPE;
    };
    await resolveTestUnit('''
foo() {}
main() {
  await foo();
  return 42;
}
''');
    await assertHasFix(DartFixKind.ADD_ASYNC, '''
foo() {}
main() async {
  await foo();
  return 42;
}
''');
  }

  test_addExplicitCast_assignment_general() async {
    await resolveTestUnit('''
f(A a) {
  B b;
  b = a;
}
class A {}
class B {}
''');
    await assertHasFix(DartFixKind.ADD_EXPLICIT_CAST, '''
f(A a) {
  B b;
  b = a as B;
}
class A {}
class B {}
''');
  }

  test_addExplicitCast_assignment_general_all() async {
    await resolveTestUnit('''
f(A a) {
  B b, b2;
  b = a;
  b2 = a;
}
class A {}
class B {}
''');
    await assertHasFixAllFix(StaticTypeWarningCode.INVALID_ASSIGNMENT,
        DartFixKind.ADD_EXPLICIT_CAST, '''
f(A a) {
  B b, b2;
  b = a as B;
  b2 = a as B;
}
class A {}
class B {}
''');
  }

  test_addExplicitCast_assignment_list() async {
    await resolveTestUnit('''
f(List<A> a) {
  List<B> b;
  b = a.where((e) => e is B).toList();
}
class A {}
class B {}
''');
    await assertHasFix(DartFixKind.ADD_EXPLICIT_CAST, '''
f(List<A> a) {
  List<B> b;
  b = a.where((e) => e is B).cast<B>().toList();
}
class A {}
class B {}
''');
  }

  test_addExplicitCast_assignment_list_all() async {
    await resolveTestUnit('''
f(List<A> a) {
  List<B> b, b2;
  b = a.where((e) => e is B).toList();
  b2 = a.where((e) => e is B).toList();
}
class A {}
class B {}
''');
    await assertHasFixAllFix(StaticTypeWarningCode.INVALID_ASSIGNMENT,
        DartFixKind.ADD_EXPLICIT_CAST, '''
f(List<A> a) {
  List<B> b, b2;
  b = a.where((e) => e is B).cast<B>().toList();
  b2 = a.where((e) => e is B).cast<B>().toList();
}
class A {}
class B {}
''');
  }

  test_addExplicitCast_assignment_map() async {
    await resolveTestUnit('''
f(Map<A, B> a) {
  Map<B, A> b;
  b = a;
}
class A {}
class B {}
''');
    await assertHasFix(DartFixKind.ADD_EXPLICIT_CAST, '''
f(Map<A, B> a) {
  Map<B, A> b;
  b = a.cast<B, A>();
}
class A {}
class B {}
''');
  }

  test_addExplicitCast_assignment_map_all() async {
    await resolveTestUnit('''
f(Map<A, B> a) {
  Map<B, A> b, b2;
  b = a;
  b2 = a;
}
class A {}
class B {}
''');
    await assertHasFixAllFix(StaticTypeWarningCode.INVALID_ASSIGNMENT,
        DartFixKind.ADD_EXPLICIT_CAST, '''
f(Map<A, B> a) {
  Map<B, A> b, b2;
  b = a.cast<B, A>();
  b2 = a.cast<B, A>();
}
class A {}
class B {}
''');
  }

  test_addExplicitCast_assignment_needsParens() async {
    await resolveTestUnit('''
f(A a) {
  B b;
  b = a..m();
}
class A {
  int m() => 0;
}
class B {}
''');
    await assertHasFix(DartFixKind.ADD_EXPLICIT_CAST, '''
f(A a) {
  B b;
  b = (a..m()) as B;
}
class A {
  int m() => 0;
}
class B {}
''');
  }

  test_addExplicitCast_assignment_needsParens_all() async {
    await resolveTestUnit('''
f(A a) {
  B b, b2;
  b = a..m();
  b2 = a..m();
}
class A {
  int m() => 0;
}
class B {}
''');
    await assertHasFixAllFix(StaticTypeWarningCode.INVALID_ASSIGNMENT,
        DartFixKind.ADD_EXPLICIT_CAST, '''
f(A a) {
  B b, b2;
  b = (a..m()) as B;
  b2 = (a..m()) as B;
}
class A {
  int m() => 0;
}
class B {}
''');
  }

  test_addExplicitCast_assignment_set() async {
    await resolveTestUnit('''
f(Set<A> a) {
  Set<B> b;
  b = a;
}
class A {}
class B {}
''');
    await assertHasFix(DartFixKind.ADD_EXPLICIT_CAST, '''
f(Set<A> a) {
  Set<B> b;
  b = a.cast<B>();
}
class A {}
class B {}
''');
  }

  test_addExplicitCast_assignment_set_all() async {
    await resolveTestUnit('''
f(Set<A> a) {
  Set<B> b, b2;
  b = a;
  b2 = a;
}
class A {}
class B {}
''');
    await assertHasFixAllFix(StaticTypeWarningCode.INVALID_ASSIGNMENT,
        DartFixKind.ADD_EXPLICIT_CAST, '''
f(Set<A> a) {
  Set<B> b, b2;
  b = a.cast<B>();
  b2 = a.cast<B>();
}
class A {}
class B {}
''');
  }

  test_addExplicitCast_BAD_as() async {
    await resolveTestUnit('''
f(A a) {
  C c = a as B;
}
class A {}
class B {}
class C {}
''');
    await assertNoFix(DartFixKind.ADD_EXPLICIT_CAST);
  }

  test_addExplicitCast_BAD_cast() async {
    await resolveTestUnit('''
f(List<A> a) {
  List<B> b = a.cast<A>();
}
class A {}
class B {}
''');
    await assertNoFix(DartFixKind.ADD_EXPLICIT_CAST);
  }

  test_addExplicitCast_declaration_general() async {
    await resolveTestUnit('''
f(A a) {
  B b = a;
}
class A {}
class B {}
''');
    await assertHasFix(DartFixKind.ADD_EXPLICIT_CAST, '''
f(A a) {
  B b = a as B;
}
class A {}
class B {}
''');
  }

  test_addExplicitCast_declaration_general_all() async {
    await resolveTestUnit('''
f(A a) {
  B b = a;
  B b2 = a;
}
class A {}
class B {}
''');
    await assertHasFixAllFix(StaticTypeWarningCode.INVALID_ASSIGNMENT,
        DartFixKind.ADD_EXPLICIT_CAST, '''
f(A a) {
  B b = a as B;
  B b2 = a as B;
}
class A {}
class B {}
''');
  }

  test_addExplicitCast_declaration_list() async {
    await resolveTestUnit('''
f(List<A> a) {
  List<B> b = a.where((e) => e is B).toList();
}
class A {}
class B {}
''');
    await assertHasFix(DartFixKind.ADD_EXPLICIT_CAST, '''
f(List<A> a) {
  List<B> b = a.where((e) => e is B).cast<B>().toList();
}
class A {}
class B {}
''');
  }

  test_addExplicitCast_declaration_list_all() async {
    await resolveTestUnit('''
f(List<A> a) {
  List<B> b = a.where((e) => e is B).toList();
  List<B> b2 = a.where((e) => e is B).toList();
}
class A {}
class B {}
''');
    await assertHasFixAllFix(StaticTypeWarningCode.INVALID_ASSIGNMENT,
        DartFixKind.ADD_EXPLICIT_CAST, '''
f(List<A> a) {
  List<B> b = a.where((e) => e is B).cast<B>().toList();
  List<B> b2 = a.where((e) => e is B).cast<B>().toList();
}
class A {}
class B {}
''');
  }

  test_addExplicitCast_declaration_map() async {
    await resolveTestUnit('''
f(Map<A, B> a) {
  Map<B, A> b = a;
}
class A {}
class B {}
''');
    await assertHasFix(DartFixKind.ADD_EXPLICIT_CAST, '''
f(Map<A, B> a) {
  Map<B, A> b = a.cast<B, A>();
}
class A {}
class B {}
''');
  }

  test_addExplicitCast_declaration_map_all() async {
    await resolveTestUnit('''
f(Map<A, B> a) {
  Map<B, A> b = a;
  Map<B, A> b2 = a;
}
class A {}
class B {}
''');
    await assertHasFixAllFix(StaticTypeWarningCode.INVALID_ASSIGNMENT,
        DartFixKind.ADD_EXPLICIT_CAST, '''
f(Map<A, B> a) {
  Map<B, A> b = a.cast<B, A>();
  Map<B, A> b2 = a.cast<B, A>();
}
class A {}
class B {}
''');
  }

  test_addExplicitCast_declaration_needsParens() async {
    await resolveTestUnit('''
f(A a) {
  B b = a..m();
}
class A {
  int m() => 0;
}
class B {}
''');
    await assertHasFix(DartFixKind.ADD_EXPLICIT_CAST, '''
f(A a) {
  B b = (a..m()) as B;
}
class A {
  int m() => 0;
}
class B {}
''');
  }

  test_addExplicitCast_declaration_needsParens_all() async {
    await resolveTestUnit('''
f(A a) {
  B b = a..m();
  B b2 = a..m();
}
class A {
  int m() => 0;
}
class B {}
''');
    await assertHasFixAllFix(StaticTypeWarningCode.INVALID_ASSIGNMENT,
        DartFixKind.ADD_EXPLICIT_CAST, '''
f(A a) {
  B b = (a..m()) as B;
  B b2 = (a..m()) as B;
}
class A {
  int m() => 0;
}
class B {}
''');
  }

  test_addExplicitCast_declaration_set() async {
    await resolveTestUnit('''
f(Set<A> a) {
  Set<B> b = a;
}
class A {}
class B {}
''');
    await assertHasFix(DartFixKind.ADD_EXPLICIT_CAST, '''
f(Set<A> a) {
  Set<B> b = a.cast<B>();
}
class A {}
class B {}
''');
  }

  test_addExplicitCast_declaration_set_all() async {
    await resolveTestUnit('''
f(Set<A> a) {
  Set<B> b = a;
  Set<B> b2 = a;
}
class A {}
class B {}
''');
    await assertHasFixAllFix(StaticTypeWarningCode.INVALID_ASSIGNMENT,
        DartFixKind.ADD_EXPLICIT_CAST, '''
f(Set<A> a) {
  Set<B> b = a.cast<B>();
  Set<B> b2 = a.cast<B>();
}
class A {}
class B {}
''');
  }

  test_addFieldFormalParameters_flutter() async {
    addFlutterPackage();
    await resolveTestUnit('''
import 'package:flutter/widgets.dart';

class MyWidget extends StatelessWidget {
  final int a;
  final int b;
  final int c;

  MyWidget({Key key, this.a}) : super(key: key);
}
''');
    await assertHasFix(DartFixKind.ADD_FIELD_FORMAL_PARAMETERS, '''
import 'package:flutter/widgets.dart';

class MyWidget extends StatelessWidget {
  final int a;
  final int b;
  final int c;

  MyWidget({Key key, this.a, this.b, this.c}) : super(key: key);
}
''');
  }

  test_addFieldFormalParameters_hasRequiredParameter() async {
    await resolveTestUnit('''
class Test {
  final int a;
  final int b;
  final int c;
  Test(this.a);
}
''');
    await assertHasFix(DartFixKind.ADD_FIELD_FORMAL_PARAMETERS, '''
class Test {
  final int a;
  final int b;
  final int c;
  Test(this.a, this.b, this.c);
}
''');
  }

  test_addFieldFormalParameters_noParameters() async {
    await resolveTestUnit('''
class Test {
  final int a;
  final int b;
  final int c;
  Test();
}
''');
    await assertHasFix(DartFixKind.ADD_FIELD_FORMAL_PARAMETERS, '''
class Test {
  final int a;
  final int b;
  final int c;
  Test(this.a, this.b, this.c);
}
''');
  }

  test_addFieldFormalParameters_noRequiredParameter() async {
    await resolveTestUnit('''
class Test {
  final int a;
  final int b;
  final int c;
  Test([this.c]);
}
''');
    await assertHasFix(DartFixKind.ADD_FIELD_FORMAL_PARAMETERS, '''
class Test {
  final int a;
  final int b;
  final int c;
  Test(this.a, this.b, [this.c]);
}
''');
  }

  test_addFieldFormalParameters_notAllFinal() async {
    await resolveTestUnit('''
class Test {
  final int a;
  int b;
  final int c;
  Test();
}
''');
    await assertHasFix(DartFixKind.ADD_FIELD_FORMAL_PARAMETERS, '''
class Test {
  final int a;
  int b;
  final int c;
  Test(this.a, this.c);
}
''');
  }

  test_addMissingParameter_constructor_named_required_hasOne() async {
    await resolveTestUnit('''
class A {
  A.named(int a) {}
}
main() {
  new A.named(1, 2.0);
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_PARAMETER_REQUIRED, '''
class A {
  A.named(int a, double d) {}
}
main() {
  new A.named(1, 2.0);
}
''');
  }

  test_addMissingParameter_constructor_unnamed_required_hasOne() async {
    await resolveTestUnit('''
class A {
  A(int a) {}
}
main() {
  new A(1, 2.0);
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_PARAMETER_REQUIRED, '''
class A {
  A(int a, double d) {}
}
main() {
  new A(1, 2.0);
}
''');
  }

  test_addMissingParameter_function_positional_hasNamed() async {
    await resolveTestUnit('''
test({int a}) {}
main() {
  test(1);
}
''');
    await assertNoFix(DartFixKind.ADD_MISSING_PARAMETER_POSITIONAL);
  }

  test_addMissingParameter_function_positional_hasZero() async {
    await resolveTestUnit('''
test() {}
main() {
  test(1);
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_PARAMETER_POSITIONAL, '''
test([int i]) {}
main() {
  test(1);
}
''');
  }

  test_addMissingParameter_function_required_hasNamed() async {
    await resolveTestUnit('''
test({int a}) {}
main() {
  test(1);
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_PARAMETER_REQUIRED, '''
test(int i, {int a}) {}
main() {
  test(1);
}
''');
  }

  test_addMissingParameter_function_required_hasOne() async {
    await resolveTestUnit('''
test(int a) {}
main() {
  test(1, 2.0);
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_PARAMETER_REQUIRED, '''
test(int a, double d) {}
main() {
  test(1, 2.0);
}
''');
  }

  test_addMissingParameter_function_required_hasZero() async {
    await resolveTestUnit('''
test() {}
main() {
  test(1);
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_PARAMETER_REQUIRED, '''
test(int i) {}
main() {
  test(1);
}
''');
  }

  test_addMissingParameter_method_positional_hasOne() async {
    await resolveTestUnit('''
class A {
  test(int a) {}
  main() {
    test(1, 2.0);
  }
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_PARAMETER_POSITIONAL, '''
class A {
  test(int a, [double d]) {}
  main() {
    test(1, 2.0);
  }
}
''');
  }

  test_addMissingParameter_method_required_hasOne() async {
    await resolveTestUnit('''
class A {
  test(int a) {}
  main() {
    test(1, 2.0);
  }
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_PARAMETER_REQUIRED, '''
class A {
  test(int a, double d) {}
  main() {
    test(1, 2.0);
  }
}
''');
  }

  test_addMissingParameter_method_required_hasZero() async {
    await resolveTestUnit('''
class A {
  test() {}
  main() {
    test(1);
  }
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_PARAMETER_REQUIRED, '''
class A {
  test(int i) {}
  main() {
    test(1);
  }
}
''');
  }

  test_addMissingParameterNamed_constructor_hasNamed() async {
    await resolveTestUnit('''
class A {
  A(int a, {int b}) {}
}

main() {
  new A(1, b: 2, named: 3.0);
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_PARAMETER_NAMED, '''
class A {
  A(int a, {int b, double named}) {}
}

main() {
  new A(1, b: 2, named: 3.0);
}
''');
  }

  test_addMissingParameterNamed_constructor_hasRequired() async {
    await resolveTestUnit('''
class A {
  A(int a) {}
}

main() {
  new A(1, named: 2.0);
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_PARAMETER_NAMED, '''
class A {
  A(int a, {double named}) {}
}

main() {
  new A(1, named: 2.0);
}
''');
  }

  test_addMissingParameterNamed_constructor_noParameters() async {
    await resolveTestUnit('''
class A {
  A() {}
}

main() {
  new A(named: 42);
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_PARAMETER_NAMED, '''
class A {
  A({int named}) {}
}

main() {
  new A(named: 42);
}
''');
  }

  test_addMissingParameterNamed_constructor_noParameters_named() async {
    await resolveTestUnit('''
class A {
  A.aaa() {}
}

main() {
  new A.aaa(named: 42);
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_PARAMETER_NAMED, '''
class A {
  A.aaa({int named}) {}
}

main() {
  new A.aaa(named: 42);
}
''');
  }

  test_addMissingParameterNamed_function_hasNamed() async {
    await resolveTestUnit('''
test(int a, {int b: 0}) {}

main() {
  test(1, b: 2, named: 3.0);
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_PARAMETER_NAMED, '''
test(int a, {int b: 0, double named}) {}

main() {
  test(1, b: 2, named: 3.0);
}
''');
  }

  test_addMissingParameterNamed_function_hasRequired() async {
    await resolveTestUnit('''
test(int a) {}

main() {
  test(1, named: 2.0);
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_PARAMETER_NAMED, '''
test(int a, {double named}) {}

main() {
  test(1, named: 2.0);
}
''');
  }

  test_addMissingParameterNamed_function_noParameters() async {
    await resolveTestUnit('''
test() {}

main() {
  test(named: 42);
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_PARAMETER_NAMED, '''
test({int named}) {}

main() {
  test(named: 42);
}
''');
  }

  test_addMissingParameterNamed_method_hasNamed() async {
    await resolveTestUnit('''
class A {
  test(int a, {int b: 0}) {}

  main() {
    test(1, b: 2, named: 3.0);
  }
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_PARAMETER_NAMED, '''
class A {
  test(int a, {int b: 0, double named}) {}

  main() {
    test(1, b: 2, named: 3.0);
  }
}
''');
  }

  test_addMissingParameterNamed_method_hasOptionalPositional() async {
    await resolveTestUnit('''
class A {
  test(int a, [int b]) {}

  main() {
    test(1, 2, named: 3.0);
  }
}
''');
    await assertNoFix(DartFixKind.ADD_MISSING_PARAMETER_NAMED);
  }

  test_addMissingParameterNamed_method_hasRequired() async {
    await resolveTestUnit('''
class A {
  test(int a) {}

  main() {
    test(1, named: 2.0);
  }
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_PARAMETER_NAMED, '''
class A {
  test(int a, {double named}) {}

  main() {
    test(1, named: 2.0);
  }
}
''');
  }

  test_addMissingParameterNamed_method_noParameters() async {
    await resolveTestUnit('''
class A {
  test() {}

  main() {
    test(named: 42);
  }
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_PARAMETER_NAMED, '''
class A {
  test({int named}) {}

  main() {
    test(named: 42);
  }
}
''');
  }

  test_addMissingRequiredArg_cons_flutter_children() async {
    addFlutterPackage();
    _addMetaPackageSource();

    await resolveTestUnit('''
import 'package:flutter/widgets.dart';
import 'package:meta/meta.dart';

class MyWidget extends Widget {
  MyWidget({@required List<Widget> children});
}

build() {
  return new MyWidget();
}
''');

    await assertHasFix(DartFixKind.ADD_MISSING_REQUIRED_ARGUMENT, '''
import 'package:flutter/widgets.dart';
import 'package:meta/meta.dart';

class MyWidget extends Widget {
  MyWidget({@required List<Widget> children});
}

build() {
  return new MyWidget(children: <Widget>[],);
}
''');
  }

  test_addMissingRequiredArg_cons_flutter_hasTrailingComma() async {
    addFlutterPackage();
    _addMetaPackageSource();

    await resolveTestUnit('''
import 'package:flutter/widgets.dart';
import 'package:meta/meta.dart';

class MyWidget extends Widget {
  MyWidget({@required int a, @required int b});
}

build() {
  return new MyWidget(a: 1,);
}
''');

    await assertHasFix(DartFixKind.ADD_MISSING_REQUIRED_ARGUMENT, '''
import 'package:flutter/widgets.dart';
import 'package:meta/meta.dart';

class MyWidget extends Widget {
  MyWidget({@required int a, @required int b});
}

build() {
  return new MyWidget(a: 1, b: null,);
}
''');
  }

  test_addMissingRequiredArg_cons_single() async {
    _addMetaPackageSource();
    addSource('/project/libA.dart', r'''
library libA;
import 'package:meta/meta.dart';

class A {
  A({@required int a}) {}
}
''');

    await resolveTestUnit('''
import 'libA.dart';

main() {
  A a = new A();
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_REQUIRED_ARGUMENT, '''
import 'libA.dart';

main() {
  A a = new A(a: null);
}
''');
  }

  test_addMissingRequiredArg_cons_single_closure() async {
    _addMetaPackageSource();

    addSource('/project/libA.dart', r'''
library libA;
import 'package:meta/meta.dart';

typedef void VoidCallback();

class A {
  A({@required VoidCallback onPressed}) {}
}
''');

    await resolveTestUnit('''
import 'libA.dart';

main() {
  A a = new A();
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_REQUIRED_ARGUMENT, '''
import 'libA.dart';

main() {
  A a = new A(onPressed: () {});
}
''');
  }

  test_addMissingRequiredArg_cons_single_closure_2() async {
    _addMetaPackageSource();

    addSource('/project/libA.dart', r'''
library libA;
import 'package:meta/meta.dart';

typedef void Callback(e);

class A {
  A({@required Callback callback}) {}
}
''');

    await resolveTestUnit('''
import 'libA.dart';

main() {
  A a = new A();
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_REQUIRED_ARGUMENT, '''
import 'libA.dart';

main() {
  A a = new A(callback: (e) {});
}
''');
  }

  test_addMissingRequiredArg_cons_single_closure_3() async {
    _addMetaPackageSource();

    addSource('/project/libA.dart', r'''
library libA;
import 'package:meta/meta.dart';

typedef void Callback(a,b,c);

class A {
  A({@required Callback callback}) {}
}
''');

    await resolveTestUnit('''
import 'libA.dart';

main() {
  A a = new A();
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_REQUIRED_ARGUMENT, '''
import 'libA.dart';

main() {
  A a = new A(callback: (a, b, c) {});
}
''');
  }

  test_addMissingRequiredArg_cons_single_closure_4() async {
    _addMetaPackageSource();

    addSource('/project/libA.dart', r'''
library libA;
import 'package:meta/meta.dart';

typedef int Callback(int a, String b,c);

class A {
  A({@required Callback callback}) {}
}
''');

    await resolveTestUnit('''
import 'libA.dart';

main() {
  A a = new A();
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_REQUIRED_ARGUMENT, '''
import 'libA.dart';

main() {
  A a = new A(callback: (int a, String b, c) {});
}
''');
  }

  test_addMissingRequiredArg_cons_single_list() async {
    _addMetaPackageSource();

    addSource('/project/libA.dart', r'''
library libA;
import 'package:meta/meta.dart';

class A {
  A({@required List<String> names}) {}
}
''');

    await resolveTestUnit('''
import 'libA.dart';

main() {
  A a = new A();
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_REQUIRED_ARGUMENT, '''
import 'libA.dart';

main() {
  A a = new A(names: <String>[]);
}
''');
  }

  test_addMissingRequiredArg_multiple() async {
    _addMetaPackageSource();

    await resolveTestUnit('''
import 'package:meta/meta.dart';

test({@required int a, @required int bcd}) {}
main() {
  test(a: 3);
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_REQUIRED_ARGUMENT, '''
import 'package:meta/meta.dart';

test({@required int a, @required int bcd}) {}
main() {
  test(a: 3, bcd: null);
}
''');
  }

  test_addMissingRequiredArg_multiple_2() async {
    _addMetaPackageSource();

    await resolveTestUnit('''
import 'package:meta/meta.dart';

test({@required int a, @required int bcd}) {}
main() {
  test();
}
''');

    // For now we expect one error per missing arg (dartbug.com/28830).
    List<AnalysisError> errors = await _computeErrors();
    expect(errors, hasLength(2));

    List<AnalysisError> filteredErrors = errors
        .where((e) => e.message == "The parameter 'a' is required.")
        .toList();
    expect(filteredErrors, hasLength(1));

    List<Fix> fixes = await _computeFixes(filteredErrors.first);

    List<Fix> filteredFixes = fixes
        .where((fix) => fix.change.message == "Add required argument 'a'")
        .toList();
    expect(filteredFixes, hasLength(1));
    change = filteredFixes.first.change;
    resultCode = SourceEdit.applySequence(testCode, change.edits[0].edits);
    // verify
    expect(resultCode, '''
import 'package:meta/meta.dart';

test({@required int a, @required int bcd}) {}
main() {
  test(a: null);
}
''');
  }

  test_addMissingRequiredArg_single() async {
    _addMetaPackageSource();

    await resolveTestUnit('''
import 'package:meta/meta.dart';

test({@required int abc}) {}
main() {
  test();
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_REQUIRED_ARGUMENT, '''
import 'package:meta/meta.dart';

test({@required int abc}) {}
main() {
  test(abc: null);
}
''');
  }

  test_addMissingRequiredArg_single_normal() async {
    _addMetaPackageSource();

    await resolveTestUnit('''
import 'package:meta/meta.dart';

test(String x, {@required int abc}) {}
main() {
  test("foo");
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_REQUIRED_ARGUMENT, '''
import 'package:meta/meta.dart';

test(String x, {@required int abc}) {}
main() {
  test("foo", abc: null);
}
''');
  }

  test_addMissingRequiredArg_single_with_details() async {
    _addMetaPackageSource();

    await resolveTestUnit('''
import 'package:meta/meta.dart';

test({@Required("Really who doesn't need an abc?") int abc}) {}
main() {
  test();
}
''');
    await assertHasFix(DartFixKind.ADD_MISSING_REQUIRED_ARGUMENT, '''
import 'package:meta/meta.dart';

test({@Required("Really who doesn't need an abc?") int abc}) {}
main() {
  test(abc: null);
}
''');
  }

  test_addStatic_multipleFields() async {
    await resolveTestUnit('''
class C {
  const int x = 0, y = 0;
}
''');
    await assertHasFix(DartFixKind.ADD_STATIC, '''
class C {
  static const int x = 0, y = 0;
}
''');
  }

  test_addStatic_oneField() async {
    await resolveTestUnit('''
class C {
  const int x = 0;
}
''');
    await assertHasFix(DartFixKind.ADD_STATIC, '''
class C {
  static const int x = 0;
}
''');
  }

  test_boolean() async {
    await resolveTestUnit('''
main() {
  boolean v;
}
''');
    await assertHasFix(DartFixKind.REPLACE_BOOLEAN_WITH_BOOL, '''
main() {
  bool v;
}
''');
  }

  test_boolean_all() async {
    await resolveTestUnit('''
main() {
  boolean v;
  boolean w;
}
''');
    await assertHasFixAllFix(StaticWarningCode.UNDEFINED_CLASS_BOOLEAN,
        DartFixKind.REPLACE_BOOLEAN_WITH_BOOL, '''
main() {
  bool v;
  bool w;
}
''');
  }

  test_canBeNullAfterNullAware_chain() async {
    await resolveTestUnit('''
main(x) {
  x?.a.b.c;
}
''');
    await assertHasFix(DartFixKind.REPLACE_WITH_NULL_AWARE, '''
main(x) {
  x?.a?.b?.c;
}
''');
  }

  test_canBeNullAfterNullAware_methodInvocation() async {
    await resolveTestUnit('''
main(x) {
  x?.a.b();
}
''');
    await assertHasFix(DartFixKind.REPLACE_WITH_NULL_AWARE, '''
main(x) {
  x?.a?.b();
}
''');
  }

  test_canBeNullAfterNullAware_propertyAccess() async {
    await resolveTestUnit('''
main(x) {
  x?.a().b;
}
''');
    await assertHasFix(DartFixKind.REPLACE_WITH_NULL_AWARE, '''
main(x) {
  x?.a()?.b;
}
''');
  }

  test_changeToStaticAccess_method() async {
    await resolveTestUnit('''
class A {
  static foo() {}
}
main(A a) {
  a.foo();
}
''');
    await assertHasFix(DartFixKind.CHANGE_TO_STATIC_ACCESS, '''
class A {
  static foo() {}
}
main(A a) {
  A.foo();
}
''');
  }

  test_changeToStaticAccess_method_importType() async {
    addSource('/project/libA.dart', r'''
library libA;
class A {
  static foo() {}
}
''');
    addSource('/project/libB.dart', r'''
library libB;
import 'libA.dart';
class B extends A {}
''');
    await resolveTestUnit('''
import 'libB.dart';
main(B b) {
  b.foo();
}
''');
    await assertHasFix(DartFixKind.CHANGE_TO_STATIC_ACCESS, '''
import 'libA.dart';
import 'libB.dart';
main(B b) {
  A.foo();
}
''');
  }

  test_changeToStaticAccess_method_prefixLibrary() async {
    await resolveTestUnit('''
import 'dart:async' as pref;
main(pref.Future f) {
  f.wait([]);
}
''');
    await assertHasFix(DartFixKind.CHANGE_TO_STATIC_ACCESS, '''
import 'dart:async' as pref;
main(pref.Future f) {
  pref.Future.wait([]);
}
''');
  }

  test_changeToStaticAccess_property() async {
    await resolveTestUnit('''
class A {
  static get foo => 42;
}
main(A a) {
  a.foo;
}
''');
    await assertHasFix(DartFixKind.CHANGE_TO_STATIC_ACCESS, '''
class A {
  static get foo => 42;
}
main(A a) {
  A.foo;
}
''');
  }

  test_changeToStaticAccess_property_importType() async {
    addSource('/project/libA.dart', r'''
library libA;
class A {
  static get foo => null;
}
''');
    addSource('/project/libB.dart', r'''
library libB;
import 'libA.dart';
class B extends A {}
''');
    await resolveTestUnit('''
import 'libB.dart';
main(B b) {
  b.foo;
}
''');
    await assertHasFix(DartFixKind.CHANGE_TO_STATIC_ACCESS, '''
import 'libA.dart';
import 'libB.dart';
main(B b) {
  A.foo;
}
''');
  }

  test_changeTypeAnnotation_BAD_multipleVariables() async {
    await resolveTestUnit('''
main() {
  String a, b = 42;
}
''');
    await assertNoFix(DartFixKind.CHANGE_TYPE_ANNOTATION);
  }

  test_changeTypeAnnotation_BAD_notVariableDeclaration() async {
    await resolveTestUnit('''
main() {
  String v;
  v = 42;
}
''');
    await assertNoFix(DartFixKind.CHANGE_TYPE_ANNOTATION);
  }

  test_changeTypeAnnotation_OK_generic() async {
    await resolveTestUnit('''
main() {
  String v = <int>[];
}
''');
    await assertHasFix(DartFixKind.CHANGE_TYPE_ANNOTATION, '''
main() {
  List<int> v = <int>[];
}
''');
  }

  test_changeTypeAnnotation_OK_simple() async {
    await resolveTestUnit('''
main() {
  String v = 'abc'.length;
}
''');
    await assertHasFix(DartFixKind.CHANGE_TYPE_ANNOTATION, '''
main() {
  int v = 'abc'.length;
}
''');
  }

  test_convertToNamedArguments_BAD_ambiguous() async {
    await resolveTestUnit('''
class A {
  A({int a, int b});
}

main() {
  new A(1, 2);
}
''');
    await assertNoFix(DartFixKind.CONVERT_TO_NAMED_ARGUMENTS);
  }

  test_convertToNamedArguments_BAD_noCompatibleParameter() async {
    await resolveTestUnit('''
class A {
  A({String a});
}

main() {
  new A(1);
}
''');
    await assertNoFix(DartFixKind.CONVERT_TO_NAMED_ARGUMENTS);
  }

  test_convertToNamedArguments_OK_instanceCreation() async {
    await resolveTestUnit('''
class A {
  A({int a, double b});
}

main() {
  new A(1.2, 3);
}
''');
    await assertHasFix(DartFixKind.CONVERT_TO_NAMED_ARGUMENTS, '''
class A {
  A({int a, double b});
}

main() {
  new A(b: 1.2, a: 3);
}
''');
  }

  test_convertToNamedArguments_OK_instanceCreation_hasPositional() async {
    await resolveTestUnit('''
class A {
  A(int a, {int b});
}

main() {
  new A(1, 2);
}
''');
    await assertHasFix(DartFixKind.CONVERT_TO_NAMED_ARGUMENTS, '''
class A {
  A(int a, {int b});
}

main() {
  new A(1, b: 2);
}
''');
  }

  test_convertToNamedArguments_OK_methodInvocation() async {
    await resolveTestUnit('''
class C {
  void foo({int a}) {}
}

main(C c) {
  c.foo(1);
}
''');
    await assertHasFix(DartFixKind.CONVERT_TO_NAMED_ARGUMENTS, '''
class C {
  void foo({int a}) {}
}

main(C c) {
  c.foo(a: 1);
}
''');
  }

  test_createClass() async {
    await resolveTestUnit('''
main() {
  Test v = null;
}
''');
    await assertHasFix(DartFixKind.CREATE_CLASS, '''
main() {
  Test v = null;
}

class Test {
}
''');
    _assertLinkedGroup(change.linkedEditGroups[0], ['Test v =', 'Test {']);
  }

  test_createClass_BAD_hasUnresolvedPrefix() async {
    await resolveTestUnit('''
main() {
  prefix.Test v = null;
}
''');
    await assertNoFix(DartFixKind.CREATE_CLASS);
  }

  test_createClass_inLibraryOfPrefix() async {
    String libCode = r'''
library my.lib;

class A {}
''';
    addSource('/project/lib.dart', libCode);
    await resolveTestUnit('''
import 'lib.dart' as lib;

main() {
  lib.A a = null;
  lib.Test t = null;
}
''');
    AnalysisError error = await _findErrorToFix();
    fix = await _assertHasFix(DartFixKind.CREATE_CLASS, error);
    change = fix.change;
    // apply to "lib.dart"
    List<SourceFileEdit> fileEdits = change.edits;
    expect(fileEdits, hasLength(1));
    SourceFileEdit fileEdit = change.edits[0];
    expect(fileEdit.file, convertPath('/project/lib.dart'));
    expect(SourceEdit.applySequence(libCode, fileEdit.edits), r'''
library my.lib;

class A {}

class Test {
}
''');
    expect(change.linkedEditGroups, hasLength(1));
  }

  test_createClass_innerLocalFunction() async {
    await resolveTestUnit('''
f() {
  g() {
    Test v = null;
  }
}
''');
    await assertHasFix(DartFixKind.CREATE_CLASS, '''
f() {
  g() {
    Test v = null;
  }
}

class Test {
}
''');
    _assertLinkedGroup(change.linkedEditGroups[0], ['Test v =', 'Test {']);
  }

  test_createClass_instanceCreation_withoutNew_fromFunction() async {
    await resolveTestUnit('''
main() {
  Test ();
}
''');
    await assertHasFix(DartFixKind.CREATE_CLASS, '''
main() {
  Test ();
}

class Test {
}
''');
    _assertLinkedGroup(change.linkedEditGroups[0], ['Test ()', 'Test {']);
  }

  test_createClass_instanceCreation_withoutNew_fromMethod() async {
    await resolveTestUnit('''
class A {
  main() {
    Test ();
  }
}
''');
    await assertHasFix(DartFixKind.CREATE_CLASS, '''
class A {
  main() {
    Test ();
  }
}

class Test {
}
''');
    _assertLinkedGroup(change.linkedEditGroups[0], ['Test ()', 'Test {']);
  }

  test_createClass_itemOfList() async {
    await resolveTestUnit('''
main() {
  var a = [Test];
}
''');
    await assertHasFix(DartFixKind.CREATE_CLASS, '''
main() {
  var a = [Test];
}

class Test {
}
''');
    _assertLinkedGroup(change.linkedEditGroups[0], ['Test];', 'Test {']);
  }

  test_createClass_itemOfList_inAnnotation() async {
    errorFilter = (AnalysisError error) {
      return error.errorCode == StaticWarningCode.UNDEFINED_IDENTIFIER;
    };
    await resolveTestUnit('''
class MyAnnotation {
  const MyAnnotation(a, b);
}
@MyAnnotation(int, const [Test])
main() {}
''');
    await assertHasFix(DartFixKind.CREATE_CLASS, '''
class MyAnnotation {
  const MyAnnotation(a, b);
}
@MyAnnotation(int, const [Test])
main() {}

class Test {
}
''');
    _assertLinkedGroup(change.linkedEditGroups[0], ['Test])', 'Test {']);
  }

  test_createConstructor_forFinalFields() async {
    errorFilter = (AnalysisError error) {
      return error.message.contains("'a'");
    };
    await resolveTestUnit('''
class Test {
  final int a;
  final int b = 2;
  final int c;
}
''');
    await assertHasFix(DartFixKind.CREATE_CONSTRUCTOR_FOR_FINAL_FIELDS, '''
class Test {
  final int a;
  final int b = 2;
  final int c;

  Test(this.a, this.c);
}
''');
  }

  test_createConstructor_forFinalFields_flutter() async {
    addFlutterPackage();
    errorFilter = (AnalysisError error) {
      return error.message.contains("'a'");
    };
    await resolveTestUnit('''
import 'package:flutter/widgets.dart';

class MyWidget extends StatelessWidget {
  final int a;
  final int b = 2;
  final int c;
}
''');
    await assertHasFix(DartFixKind.CREATE_CONSTRUCTOR_FOR_FINAL_FIELDS, '''
import 'package:flutter/widgets.dart';

class MyWidget extends StatelessWidget {
  final int a;
  final int b = 2;
  final int c;

  const MyWidget({Key key, this.a, this.c}) : super(key: key);
}
''');
  }

  test_createConstructor_forFinalFields_flutter_childLast() async {
    addFlutterPackage();
    errorFilter = (AnalysisError error) {
      return error.message.contains("'a'");
    };
    await resolveTestUnit('''
import 'package:flutter/widgets.dart';

class MyWidget extends StatelessWidget {
  final int a;
  final Widget child;
  final int b;
}
''');
    await assertHasFix(DartFixKind.CREATE_CONSTRUCTOR_FOR_FINAL_FIELDS, '''
import 'package:flutter/widgets.dart';

class MyWidget extends StatelessWidget {
  final int a;
  final Widget child;
  final int b;

  const MyWidget({Key key, this.a, this.b, this.child}) : super(key: key);
}
''');
  }

  test_createConstructor_forFinalFields_flutter_childrenLast() async {
    addFlutterPackage();
    errorFilter = (AnalysisError error) {
      return error.message.contains("'a'");
    };
    await resolveTestUnit('''
import 'package:flutter/widgets.dart';

class MyWidget extends StatelessWidget {
  final int a;
  final List<Widget> children;
  final int b;
}
''');
    await assertHasFix(DartFixKind.CREATE_CONSTRUCTOR_FOR_FINAL_FIELDS, '''
import 'package:flutter/widgets.dart';

class MyWidget extends StatelessWidget {
  final int a;
  final List<Widget> children;
  final int b;

  const MyWidget({Key key, this.a, this.b, this.children}) : super(key: key);
}
''');
  }

  test_createConstructor_insteadOfSyntheticDefault() async {
    await resolveTestUnit('''
class A {
  int field;

  method() {}
}
main() {
  new A(1, 2.0);
}
''');
    await assertHasFix(DartFixKind.CREATE_CONSTRUCTOR, '''
class A {
  int field;

  A(int i, double d);

  method() {}
}
main() {
  new A(1, 2.0);
}
''');
  }

  test_createConstructor_named() async {
    await resolveTestUnit('''
class A {
  method() {}
}
main() {
  new A.named(1, 2.0);
}
''');
    await assertHasFix(DartFixKind.CREATE_CONSTRUCTOR, '''
class A {
  A.named(int i, double d);

  method() {}
}
main() {
  new A.named(1, 2.0);
}
''');
    _assertLinkedGroup(change.linkedEditGroups[0], ['named(int ', 'named(1']);
  }

  test_createConstructor_named_emptyClassBody() async {
    await resolveTestUnit('''
class A {}
main() {
  new A.named(1);
}
''');
    await assertHasFix(DartFixKind.CREATE_CONSTRUCTOR, '''
class A {
  A.named(int i);
}
main() {
  new A.named(1);
}
''');
    _assertLinkedGroup(change.linkedEditGroups[0], ['named(int ', 'named(1']);
  }

  test_createConstructorForFinalFields_inTopLevelMethod() async {
    await resolveTestUnit('''
main() {
  final int v;
}
''');
    await assertNoFix(DartFixKind.CREATE_CONSTRUCTOR_FOR_FINAL_FIELDS);
  }

  test_createConstructorForFinalFields_topLevelField() async {
    await resolveTestUnit('''
final int v;
''');
    await assertNoFix(DartFixKind.CREATE_CONSTRUCTOR_FOR_FINAL_FIELDS);
  }

  test_createConstructorSuperExplicit() async {
    await resolveTestUnit('''
class A {
  A(bool p1, int p2, double p3, String p4, {p5});
}
class B extends A {
  B() {}
}
''');
    await assertHasFix(DartFixKind.ADD_SUPER_CONSTRUCTOR_INVOCATION, '''
class A {
  A(bool p1, int p2, double p3, String p4, {p5});
}
class B extends A {
  B() : super(false, 0, 0.0, '') {}
}
''');
  }

  test_createConstructorSuperExplicit_hasInitializers() async {
    await resolveTestUnit('''
class A {
  A(int p);
}
class B extends A {
  int field;
  B() : field = 42 {}
}
''');
    await assertHasFix(DartFixKind.ADD_SUPER_CONSTRUCTOR_INVOCATION, '''
class A {
  A(int p);
}
class B extends A {
  int field;
  B() : field = 42, super(0) {}
}
''');
  }

  test_createConstructorSuperExplicit_named() async {
    await resolveTestUnit('''
class A {
  A.named(int p);
}
class B extends A {
  B() {}
}
''');
    await assertHasFix(DartFixKind.ADD_SUPER_CONSTRUCTOR_INVOCATION, '''
class A {
  A.named(int p);
}
class B extends A {
  B() : super.named(0) {}
}
''');
  }

  test_createConstructorSuperExplicit_named_private() async {
    await resolveTestUnit('''
class A {
  A._named(int p);
}
class B extends A {
  B() {}
}
''');
    await assertNoFix(DartFixKind.ADD_SUPER_CONSTRUCTOR_INVOCATION);
  }

  test_createConstructorSuperExplicit_typeArgument() async {
    await resolveTestUnit('''
class A<T> {
  A(T p);
}
class B extends A<int> {
  B();
}
''');
    await assertHasFix(DartFixKind.ADD_SUPER_CONSTRUCTOR_INVOCATION, '''
class A<T> {
  A(T p);
}
class B extends A<int> {
  B() : super(0);
}
''');
  }

  test_createConstructorSuperImplicit() async {
    await resolveTestUnit('''
class A {
  A(p1, int p2, List<String> p3, [int p4]);
}
class B extends A {
  int existingField;

  void existingMethod() {}
}
''');
    await assertHasFix(DartFixKind.CREATE_CONSTRUCTOR_SUPER, '''
class A {
  A(p1, int p2, List<String> p3, [int p4]);
}
class B extends A {
  int existingField;

  B(p1, int p2, List<String> p3) : super(p1, p2, p3);

  void existingMethod() {}
}
''');
  }

  test_createConstructorSuperImplicit_fieldInitializer() async {
    await resolveTestUnit('''
class A {
  int _field;
  A(this._field);
}
class B extends A {
  int existingField;

  void existingMethod() {}
}
''');
    await assertHasFix(DartFixKind.CREATE_CONSTRUCTOR_SUPER, '''
class A {
  int _field;
  A(this._field);
}
class B extends A {
  int existingField;

  B(int field) : super(field);

  void existingMethod() {}
}
''');
  }

  test_createConstructorSuperImplicit_importType() async {
    addSource('/project/libA.dart', r'''
library libA;
class A {}
''');
    addSource('/project/libB.dart', r'''
library libB;
import 'libA.dart';
class B {
  B(A a);
}
''');
    await resolveTestUnit('''
import 'libB.dart';
class C extends B {
}
''');
    await assertHasFix(DartFixKind.CREATE_CONSTRUCTOR_SUPER, '''
import 'libA.dart';
import 'libB.dart';
class C extends B {
  C(A a) : super(a);
}
''');
  }

  test_createConstructorSuperImplicit_named() async {
    await resolveTestUnit('''
class A {
  A.named(p1, int p2);
}
class B extends A {
  int existingField;

  void existingMethod() {}
}
''');
    await assertHasFix(DartFixKind.CREATE_CONSTRUCTOR_SUPER, '''
class A {
  A.named(p1, int p2);
}
class B extends A {
  int existingField;

  B.named(p1, int p2) : super.named(p1, p2);

  void existingMethod() {}
}
''');
  }

  test_createConstructorSuperImplicit_private() async {
    await resolveTestUnit('''
class A {
  A._named(p);
}
class B extends A {
}
''');
    await assertNoFix(DartFixKind.CREATE_CONSTRUCTOR_SUPER);
  }

  test_createConstructorSuperImplicit_typeArgument() async {
    await resolveTestUnit('''
class C<T> {
  final T x;
  C(this.x);
}
class D extends C<int> {
}''');
    await assertHasFix(DartFixKind.CREATE_CONSTRUCTOR_SUPER, '''
class C<T> {
  final T x;
  C(this.x);
}
class D extends C<int> {
  D(int x) : super(x);
}''');
  }

  test_createField_BAD_inEnum() async {
    await resolveTestUnit('''
enum MyEnum {
  AAA, BBB
}
main() {
  MyEnum.foo;
}
''');
    await assertNoFix(DartFixKind.CREATE_FIELD);
  }

  test_createField_BAD_inSDK() async {
    await resolveTestUnit('''
main(List p) {
  p.foo = 1;
}
''');
    await assertNoFix(DartFixKind.CREATE_FIELD);
  }

  test_createField_getter_multiLevel() async {
    await resolveTestUnit('''
class A {
}
class B {
  A a;
}
class C {
  B b;
}
main(C c) {
  int v = c.b.a.test;
}
''');
    await assertHasFix(DartFixKind.CREATE_FIELD, '''
class A {
  int test;
}
class B {
  A a;
}
class C {
  B b;
}
main(C c) {
  int v = c.b.a.test;
}
''');
  }

  test_createField_getter_qualified_instance() async {
    await resolveTestUnit('''
class A {
}
main(A a) {
  int v = a.test;
}
''');
    await assertHasFix(DartFixKind.CREATE_FIELD, '''
class A {
  int test;
}
main(A a) {
  int v = a.test;
}
''');
  }

  test_createField_getter_qualified_instance_differentLibrary() async {
    addSource('/project/other.dart', '''
/**
 * A comment to push the offset of the braces for the following class
 * declaration past the end of the content of the test file. Used to catch an
 * index out of bounds exception that occurs when using the test source instead
 * of the target source to compute the location at which to insert the field.
 */
class A {
}
''');
    await resolveTestUnit('''
import 'other.dart';
main(A a) {
  int v = a.test;
}
''');
    await assertHasFix(
        DartFixKind.CREATE_FIELD,
        '''
/**
 * A comment to push the offset of the braces for the following class
 * declaration past the end of the content of the test file. Used to catch an
 * index out of bounds exception that occurs when using the test source instead
 * of the target source to compute the location at which to insert the field.
 */
class A {
  int test;
}
''',
        target: '/project/other.dart');
  }

  test_createField_getter_qualified_instance_dynamicType() async {
    await resolveTestUnit('''
class A {
  B b;
  void f(Object p) {
    p == b.test;
  }
}
class B {
}
''');
    await assertHasFix(DartFixKind.CREATE_FIELD, '''
class A {
  B b;
  void f(Object p) {
    p == b.test;
  }
}
class B {
  var test;
}
''');
  }

  test_createField_getter_qualified_propagatedType() async {
    await resolveTestUnit('''
class A {
  A get self => this;
}
main() {
  var a = new A();
  int v = a.self.test;
}
''');
    await assertHasFix(DartFixKind.CREATE_FIELD, '''
class A {
  int test;

  A get self => this;
}
main() {
  var a = new A();
  int v = a.self.test;
}
''');
  }

  test_createField_getter_unqualified_instance_asInvocationArgument() async {
    await resolveTestUnit('''
class A {
  main() {
    f(test);
  }
}
f(String s) {}
''');
    await assertHasFix(DartFixKind.CREATE_FIELD, '''
class A {
  String test;

  main() {
    f(test);
  }
}
f(String s) {}
''');
  }

  test_createField_getter_unqualified_instance_assignmentRhs() async {
    await resolveTestUnit('''
class A {
  main() {
    int v = test;
  }
}
''');
    await assertHasFix(DartFixKind.CREATE_FIELD, '''
class A {
  int test;

  main() {
    int v = test;
  }
}
''');
  }

  test_createField_getter_unqualified_instance_asStatement() async {
    await resolveTestUnit('''
class A {
  main() {
    test;
  }
}
''');
    await assertHasFix(DartFixKind.CREATE_FIELD, '''
class A {
  var test;

  main() {
    test;
  }
}
''');
  }

  test_createField_hint() async {
    await resolveTestUnit('''
class A {
}
main(A a) {
  var x = a;
  int v = x.test;
}
''');
    await assertHasFix(DartFixKind.CREATE_FIELD, '''
class A {
  int test;
}
main(A a) {
  var x = a;
  int v = x.test;
}
''');
  }

  test_createField_hint_setter() async {
    await resolveTestUnit('''
class A {
}
main(A a) {
  var x = a;
  x.test = 0;
}
''');
    await assertHasFix(DartFixKind.CREATE_FIELD, '''
class A {
  int test;
}
main(A a) {
  var x = a;
  x.test = 0;
}
''');
  }

  test_createField_importType() async {
    addSource('/project/libA.dart', r'''
library libA;
class A {}
''');
    addSource('/project/libB.dart', r'''
library libB;
import 'libA.dart';
A getA() => null;
''');
    await resolveTestUnit('''
import 'libB.dart';
class C {
}
main(C c) {
  c.test = getA();
}
''');
    await assertHasFix(DartFixKind.CREATE_FIELD, '''
import 'libA.dart';
import 'libB.dart';
class C {
  A test;
}
main(C c) {
  c.test = getA();
}
''');
  }

  test_createField_invalidInitializer_withoutType() async {
    await resolveTestUnit('''
class C {
  C(this.text);
}
''');
    await assertHasFix(DartFixKind.CREATE_FIELD, '''
class C {
  var text;

  C(this.text);
}
''');
  }

  test_createField_invalidInitializer_withType() async {
    await resolveTestUnit('''
class C {
  C(String this.text);
}
''');
    await assertHasFix(DartFixKind.CREATE_FIELD, '''
class C {
  String text;

  C(String this.text);
}
''');
  }

  test_createField_setter_generic_BAD() async {
    await resolveTestUnit('''
class A {
}
class B<T> {
  List<T> items;
  main(A a) {
    a.test = items;
  }
}
''');
    await assertHasFix(DartFixKind.CREATE_FIELD, '''
class A {
  List test;
}
class B<T> {
  List<T> items;
  main(A a) {
    a.test = items;
  }
}
''');
  }

  test_createField_setter_generic_OK_local() async {
    await resolveTestUnit('''
class A<T> {
  List<T> items;

  main(A a) {
    test = items;
  }
}
''');
    await assertHasFix(DartFixKind.CREATE_FIELD, '''
class A<T> {
  List<T> items;

  List<T> test;

  main(A a) {
    test = items;
  }
}
''');
  }

  test_createField_setter_qualified_instance_hasField() async {
    await resolveTestUnit('''
class A {
  int aaa;
  int zzz;

  existingMethod() {}
}
main(A a) {
  a.test = 5;
}
''');
    await assertHasFix(DartFixKind.CREATE_FIELD, '''
class A {
  int aaa;
  int zzz;

  int test;

  existingMethod() {}
}
main(A a) {
  a.test = 5;
}
''');
  }

  test_createField_setter_qualified_instance_hasMethod() async {
    await resolveTestUnit('''
class A {
  existingMethod() {}
}
main(A a) {
  a.test = 5;
}
''');
    await assertHasFix(DartFixKind.CREATE_FIELD, '''
class A {
  int test;

  existingMethod() {}
}
main(A a) {
  a.test = 5;
}
''');
  }

  test_createField_setter_qualified_static() async {
    await resolveTestUnit('''
class A {
}
main() {
  A.test = 5;
}
''');
    await assertHasFix(DartFixKind.CREATE_FIELD, '''
class A {
  static int test;
}
main() {
  A.test = 5;
}
''');
  }

  test_createField_setter_unqualified_instance() async {
    await resolveTestUnit('''
class A {
  main() {
    test = 5;
  }
}
''');
    await assertHasFix(DartFixKind.CREATE_FIELD, '''
class A {
  int test;

  main() {
    test = 5;
  }
}
''');
  }

  test_createField_setter_unqualified_static() async {
    await resolveTestUnit('''
class A {
  static main() {
    test = 5;
  }
}
''');
    await assertHasFix(DartFixKind.CREATE_FIELD, '''
class A {
  static int test;

  static main() {
    test = 5;
  }
}
''');
  }

  test_createFile_forImport() async {
    testFile = '/my/project/bin/test.dart';
    await resolveTestUnit('''
import 'my_file.dart';
''');
    AnalysisError error = await _findErrorToFix();
    fix = await _assertHasFix(DartFixKind.CREATE_FILE, error);
    change = fix.change;
    // validate change
    List<SourceFileEdit> fileEdits = change.edits;
    expect(fileEdits, hasLength(1));
    SourceFileEdit fileEdit = change.edits[0];
    expect(fileEdit.file, convertPath('/my/project/bin/my_file.dart'));
    expect(fileEdit.fileStamp, -1);
    expect(fileEdit.edits, hasLength(1));
    expect(fileEdit.edits[0].replacement, contains('library my_file;'));
  }

  test_createFile_forImport_BAD_inPackage_lib_justLib() async {
    newFile('/projects/my_package/pubspec.yaml', content: 'name: my_package');
    testFile = '/projects/my_package/test.dart';
    await resolveTestUnit('''
import 'lib';
''');
    await assertNoFix(DartFixKind.CREATE_FILE);
  }

  test_createFile_forImport_BAD_notDart() async {
    testFile = '/my/project/bin/test.dart';
    await resolveTestUnit('''
import 'my_file.txt';
''');
    await assertNoFix(DartFixKind.CREATE_FILE);
  }

  test_createFile_forImport_inPackage_lib() async {
    newFile('/projects/my_package/pubspec.yaml', content: 'name: my_package');
    testFile = '/projects/my_package/lib/test.dart';
    newFolder('/projects/my_package/lib');
    await resolveTestUnit('''
import 'a/bb/c_cc/my_lib.dart';
''');
    AnalysisError error = await _findErrorToFix();
    fix = await _assertHasFix(DartFixKind.CREATE_FILE, error);
    change = fix.change;
    // validate change
    List<SourceFileEdit> fileEdits = change.edits;
    expect(fileEdits, hasLength(1));
    SourceFileEdit fileEdit = change.edits[0];
    expect(fileEdit.file,
        convertPath('/projects/my_package/lib/a/bb/c_cc/my_lib.dart'));
    expect(fileEdit.fileStamp, -1);
    expect(fileEdit.edits, hasLength(1));
    expect(fileEdit.edits[0].replacement,
        contains('library my_package.a.bb.c_cc.my_lib;'));
  }

  test_createFile_forImport_inPackage_test() async {
    newFile('/projects/my_package/pubspec.yaml', content: 'name: my_package');
    testFile = '/projects/my_package/test/misc/test_all.dart';
    await resolveTestUnit('''
import 'a/bb/my_lib.dart';
''');
    AnalysisError error = await _findErrorToFix();
    fix = await _assertHasFix(DartFixKind.CREATE_FILE, error);
    change = fix.change;
    // validate change
    List<SourceFileEdit> fileEdits = change.edits;
    expect(fileEdits, hasLength(1));
    SourceFileEdit fileEdit = change.edits[0];
    expect(fileEdit.file,
        convertPath('/projects/my_package/test/misc/a/bb/my_lib.dart'));
    expect(fileEdit.fileStamp, -1);
    expect(fileEdit.edits, hasLength(1));
    expect(fileEdit.edits[0].replacement,
        contains('library my_package.test.misc.a.bb.my_lib;'));
  }

  test_createFile_forPart() async {
    testFile = convertPath('/my/project/bin/test.dart');
    await resolveTestUnit('''
library my.lib;
part 'my_part.dart';
''');
    AnalysisError error = await _findErrorToFix();
    fix = await _assertHasFix(DartFixKind.CREATE_FILE, error);
    change = fix.change;
    // validate change
    List<SourceFileEdit> fileEdits = change.edits;
    expect(fileEdits, hasLength(1));
    SourceFileEdit fileEdit = change.edits[0];
    expect(fileEdit.file, convertPath('/my/project/bin/my_part.dart'));
    expect(fileEdit.fileStamp, -1);
    expect(fileEdit.edits, hasLength(1));
    expect(fileEdit.edits[0].replacement, contains('part of my.lib;'));
  }

  test_createFile_forPart_inPackageLib() async {
    newFile('/my/pubspec.yaml', content: r'''
name: my_test
''');
    testFile = '/my/lib/test.dart';
    addTestSource('''
library my.lib;
part 'my_part.dart';
''', Uri.parse('package:my/test.dart'));
    // configure SourceFactory
    UriResolver pkgResolver = new PackageMapUriResolver(resourceProvider, {
      'my': <Folder>[getFolder('/my/lib')],
    });
    SourceFactory sourceFactory = new SourceFactory(
        [new DartUriResolver(sdk), pkgResolver, resourceResolver]);
    driver.configure(sourceFactory: sourceFactory);
    testUnit = (await driver.getResult(convertPath(testFile))).unit;
    // prepare fix
    AnalysisError error = await _findErrorToFix();
    fix = await _assertHasFix(DartFixKind.CREATE_FILE, error);
    change = fix.change;
    // validate change
    List<SourceFileEdit> fileEdits = change.edits;
    expect(fileEdits, hasLength(1));
    SourceFileEdit fileEdit = change.edits[0];
    expect(fileEdit.file, convertPath('/my/lib/my_part.dart'));
    expect(fileEdit.fileStamp, -1);
    expect(fileEdit.edits, hasLength(1));
    expect(fileEdit.edits[0].replacement, contains('part of my.lib;'));
  }

  test_createGetter_BAD_inSDK() async {
    await resolveTestUnit('''
main(List p) {
  int v = p.foo;
}
''');
    await assertNoFix(DartFixKind.CREATE_GETTER);
  }

  test_createGetter_hint_getter() async {
    await resolveTestUnit('''
class A {
}
main(A a) {
  var x = a;
  int v = x.test;
}
''');
    await assertHasFix(DartFixKind.CREATE_GETTER, '''
class A {
  int get test => null;
}
main(A a) {
  var x = a;
  int v = x.test;
}
''');
  }

  test_createGetter_location_afterLastGetter() async {
    await resolveTestUnit('''
class A {
  int existingField;

  int get existingGetter => null;

  existingMethod() {}
}
main(A a) {
  int v = a.test;
}
''');
    await assertHasFix(DartFixKind.CREATE_GETTER, '''
class A {
  int existingField;

  int get existingGetter => null;

  int get test => null;

  existingMethod() {}
}
main(A a) {
  int v = a.test;
}
''');
  }

  test_createGetter_multiLevel() async {
    await resolveTestUnit('''
class A {
}
class B {
  A a;
}
class C {
  B b;
}
main(C c) {
  int v = c.b.a.test;
}
''');
    await assertHasFix(DartFixKind.CREATE_GETTER, '''
class A {
  int get test => null;
}
class B {
  A a;
}
class C {
  B b;
}
main(C c) {
  int v = c.b.a.test;
}
''');
  }

  test_createGetter_qualified_instance() async {
    await resolveTestUnit('''
class A {
}
main(A a) {
  int v = a.test;
}
''');
    await assertHasFix(DartFixKind.CREATE_GETTER, '''
class A {
  int get test => null;
}
main(A a) {
  int v = a.test;
}
''');
  }

  test_createGetter_qualified_instance_differentLibrary() async {
    addSource('/project/other.dart', '''
/**
 * A comment to push the offset of the braces for the following class
 * declaration past the end of the content of the test file. Used to catch an
 * index out of bounds exception that occurs when using the test source instead
 * of the target source to compute the location at which to insert the field.
 */
class A {
}
''');
    await resolveTestUnit('''
import 'other.dart';
main(A a) {
  int v = a.test;
}
''');
    await assertHasFix(
        DartFixKind.CREATE_GETTER,
        '''
/**
 * A comment to push the offset of the braces for the following class
 * declaration past the end of the content of the test file. Used to catch an
 * index out of bounds exception that occurs when using the test source instead
 * of the target source to compute the location at which to insert the field.
 */
class A {
  int get test => null;
}
''',
        target: '/project/other.dart');
  }

  test_createGetter_qualified_instance_dynamicType() async {
    await resolveTestUnit('''
class A {
  B b;
  void f(Object p) {
    p == b.test;
  }
}
class B {
}
''');
    await assertHasFix(DartFixKind.CREATE_GETTER, '''
class A {
  B b;
  void f(Object p) {
    p == b.test;
  }
}
class B {
  get test => null;
}
''');
  }

  test_createGetter_qualified_propagatedType() async {
    await resolveTestUnit('''
class A {
  A get self => this;
}
main() {
  var a = new A();
  int v = a.self.test;
}
''');
    await assertHasFix(DartFixKind.CREATE_GETTER, '''
class A {
  A get self => this;

  int get test => null;
}
main() {
  var a = new A();
  int v = a.self.test;
}
''');
  }

  test_createGetter_setterContext() async {
    await resolveTestUnit('''
class A {
}
main(A a) {
  a.test = 42;
}
''');
    await assertNoFix(DartFixKind.CREATE_GETTER);
  }

  test_createGetter_unqualified_instance_asInvocationArgument() async {
    await resolveTestUnit('''
class A {
  main() {
    f(test);
  }
}
f(String s) {}
''');
    await assertHasFix(DartFixKind.CREATE_GETTER, '''
class A {
  String get test => null;

  main() {
    f(test);
  }
}
f(String s) {}
''');
  }

  test_createGetter_unqualified_instance_assignmentLhs() async {
    await resolveTestUnit('''
class A {
  main() {
    test = 42;
  }
}
''');
    await assertNoFix(DartFixKind.CREATE_GETTER);
  }

  test_createGetter_unqualified_instance_assignmentRhs() async {
    await resolveTestUnit('''
class A {
  main() {
    int v = test;
  }
}
''');
    await assertHasFix(DartFixKind.CREATE_GETTER, '''
class A {
  int get test => null;

  main() {
    int v = test;
  }
}
''');
  }

  test_createGetter_unqualified_instance_asStatement() async {
    await resolveTestUnit('''
class A {
  main() {
    test;
  }
}
''');
    await assertHasFix(DartFixKind.CREATE_GETTER, '''
class A {
  get test => null;

  main() {
    test;
  }
}
''');
  }

  test_createLocalVariable_functionType_named() async {
    await resolveTestUnit('''
typedef MY_FUNCTION(int p);
foo(MY_FUNCTION f) {}
main() {
  foo(bar);
}
''');
    await assertHasFix(DartFixKind.CREATE_LOCAL_VARIABLE, '''
typedef MY_FUNCTION(int p);
foo(MY_FUNCTION f) {}
main() {
  MY_FUNCTION bar;
  foo(bar);
}
''');
  }

  test_createLocalVariable_functionType_named_generic() async {
    await resolveTestUnit('''
typedef MY_FUNCTION<T>(T p);
foo(MY_FUNCTION<int> f) {}
main() {
  foo(bar);
}
''');
    await assertHasFix(DartFixKind.CREATE_LOCAL_VARIABLE, '''
typedef MY_FUNCTION<T>(T p);
foo(MY_FUNCTION<int> f) {}
main() {
  MY_FUNCTION<int> bar;
  foo(bar);
}
''');
  }

  test_createLocalVariable_functionType_synthetic() async {
    await resolveTestUnit('''
foo(f(int p)) {}
main() {
  foo(bar);
}
''');
    await assertHasFix(DartFixKind.CREATE_LOCAL_VARIABLE, '''
foo(f(int p)) {}
main() {
  Function(int p) bar;
  foo(bar);
}
''');
  }

  test_createLocalVariable_read_typeAssignment() async {
    await resolveTestUnit('''
main() {
  int a = test;
}
''');
    await assertHasFix(DartFixKind.CREATE_LOCAL_VARIABLE, '''
main() {
  int test;
  int a = test;
}
''');
  }

  test_createLocalVariable_read_typeCondition() async {
    await resolveTestUnit('''
main() {
  if (!test) {
    print(42);
  }
}
''');
    await assertHasFix(DartFixKind.CREATE_LOCAL_VARIABLE, '''
main() {
  bool test;
  if (!test) {
    print(42);
  }
}
''');
  }

  test_createLocalVariable_read_typeInvocationArgument() async {
    await resolveTestUnit('''
main() {
  f(test);
}
f(String p) {}
''');
    await assertHasFix(DartFixKind.CREATE_LOCAL_VARIABLE, '''
main() {
  String test;
  f(test);
}
f(String p) {}
''');
    _assertLinkedGroup(change.linkedEditGroups[0], ['String test;']);
    _assertLinkedGroup(change.linkedEditGroups[1], ['test;', 'test);']);
  }

  test_createLocalVariable_read_typeInvocationTarget() async {
    await resolveTestUnit('''
main() {
  test.add('hello');
}
''');
    await assertHasFix(DartFixKind.CREATE_LOCAL_VARIABLE, '''
main() {
  var test;
  test.add('hello');
}
''');
    _assertLinkedGroup(change.linkedEditGroups[0], ['test;', 'test.add(']);
  }

  test_createLocalVariable_withImport() async {
    addPackageSource('pkg', 'a/a.dart', '''
class A {}
''');
    addPackageSource('pkg', 'b/b.dart', '''
class B {}
''');
    addPackageSource('pkg', 'c/c.dart', '''
import 'package:pkg/a/a.dart';
import 'package:pkg/b/b.dart';

class C {
  C(A a, B b);
}
''');

    await resolveTestUnit('''
import 'package:pkg/a/a.dart';
import 'package:pkg/c/c.dart';

main() {
  A a;
  new C(a, b);
}
''');
    await assertHasFix(DartFixKind.CREATE_LOCAL_VARIABLE, '''
import 'package:pkg/a/a.dart';
import 'package:pkg/b/b.dart';
import 'package:pkg/c/c.dart';

main() {
  A a;
  B b;
  new C(a, b);
}
''');

    List<LinkedEditGroup> groups = change.linkedEditGroups;
    expect(groups, hasLength(2));
    LinkedEditGroup typeGroup = groups[0];
    List<Position> typePositions = typeGroup.positions;
    expect(typePositions, hasLength(1));
    expect(typePositions[0].offset, 112);
    LinkedEditGroup nameGroup = groups[1];
    List<Position> groupPositions = nameGroup.positions;
    expect(groupPositions, hasLength(2));
    expect(groupPositions[0].offset, 114);
    expect(groupPositions[1].offset, 128);
  }

  test_createLocalVariable_write_assignment() async {
    await resolveTestUnit('''
main() {
  test = 42;
}
''');
    await assertHasFix(DartFixKind.CREATE_LOCAL_VARIABLE, '''
main() {
  var test = 42;
}
''');
  }

  test_createLocalVariable_write_assignment_compound() async {
    await resolveTestUnit('''
main() {
  test += 42;
}
''');
    await assertHasFix(DartFixKind.CREATE_LOCAL_VARIABLE, '''
main() {
  int test;
  test += 42;
}
''');
  }

  test_createMissingOverrides_field_untyped() async {
    await resolveTestUnit('''
class A {
  var f;
}

class B implements A {
}
''');
    await assertHasFix(DartFixKind.CREATE_MISSING_OVERRIDES, '''
class A {
  var f;
}

class B implements A {
  @override
  var f;
}
''');
  }

  test_createMissingOverrides_functionTypeAlias() async {
    await resolveTestUnit('''
typedef int Binary(int left, int right);

abstract class Emulator {
  void performBinary(Binary binary);
}

class MyEmulator extends Emulator {
}
''');
    await assertHasFix(DartFixKind.CREATE_MISSING_OVERRIDES, '''
typedef int Binary(int left, int right);

abstract class Emulator {
  void performBinary(Binary binary);
}

class MyEmulator extends Emulator {
  @override
  void performBinary(Binary binary) {
    // TODO: implement performBinary
  }
}
''');
  }

  test_createMissingOverrides_functionTypedParameter() async {
    await resolveTestUnit('''
abstract class A {
  forEach(int f(double p1, String p2));
}

class B extends A {
}
''');
    await assertHasFix(DartFixKind.CREATE_MISSING_OVERRIDES, '''
abstract class A {
  forEach(int f(double p1, String p2));
}

class B extends A {
  @override
  forEach(int Function(double p1, String p2) f) {
    // TODO: implement forEach
  }
}
''');
  }

  test_createMissingOverrides_generics_typeArguments() async {
    await resolveTestUnit('''
class Iterator<T> {
}

abstract class IterableMixin<T> {
  Iterator<T> get iterator;
}

class Test extends IterableMixin<int> {
}
''');
    await assertHasFix(DartFixKind.CREATE_MISSING_OVERRIDES, '''
class Iterator<T> {
}

abstract class IterableMixin<T> {
  Iterator<T> get iterator;
}

class Test extends IterableMixin<int> {
  // TODO: implement iterator
  @override
  Iterator<int> get iterator => null;
}
''');
  }

  test_createMissingOverrides_generics_typeParameters() async {
    await resolveTestUnit('''
abstract class ItemProvider<T> {
  List<T> getItems();
}

class Test<V> extends ItemProvider<V> {
}
''');
    await assertHasFix(DartFixKind.CREATE_MISSING_OVERRIDES, '''
abstract class ItemProvider<T> {
  List<T> getItems();
}

class Test<V> extends ItemProvider<V> {
  @override
  List<V> getItems() {
    // TODO: implement getItems
  }
}
''');
  }

  test_createMissingOverrides_getter() async {
    await resolveTestUnit('''
abstract class A {
  get g1;
  int get g2;
}

class B extends A {
}
''');
    await assertHasFix(DartFixKind.CREATE_MISSING_OVERRIDES, '''
abstract class A {
  get g1;
  int get g2;
}

class B extends A {
  // TODO: implement g1
  @override
  get g1 => null;

  // TODO: implement g2
  @override
  int get g2 => null;
}
''');
  }

  test_createMissingOverrides_importPrefix() async {
    await resolveTestUnit('''
import 'dart:async' as aaa;
abstract class A {
  Map<aaa.Future, List<aaa.Future>> g(aaa.Future p);
}

class B extends A {
}
''');
    await assertHasFix(DartFixKind.CREATE_MISSING_OVERRIDES, '''
import 'dart:async' as aaa;
abstract class A {
  Map<aaa.Future, List<aaa.Future>> g(aaa.Future p);
}

class B extends A {
  @override
  Map<aaa.Future, List<aaa.Future>> g(aaa.Future p) {
    // TODO: implement g
  }
}
''');
  }

  test_createMissingOverrides_mergeToField_getterSetter() async {
    await resolveTestUnit('''
class A {
  int ma;
  void mb() {}
  double mc;
}

class B implements A {
}
''');
    await assertHasFix(DartFixKind.CREATE_MISSING_OVERRIDES, '''
class A {
  int ma;
  void mb() {}
  double mc;
}

class B implements A {
  @override
  int ma;

  @override
  double mc;

  @override
  void mb() {
    // TODO: implement mb
  }
}
''');
  }

  test_createMissingOverrides_method() async {
    await resolveTestUnit('''
abstract class A {
  m1();
  int m2();
  String m3(int p1, double p2, Map<int, List<String>> p3);
  String m4(p1, p2);
  String m5(p1, [int p2 = 2, int p3, p4 = 4]);
  String m6(p1, {int p2 = 2, int p3, p4: 4});
}

class B extends A {
}
''');
    String expectedCode = '''
abstract class A {
  m1();
  int m2();
  String m3(int p1, double p2, Map<int, List<String>> p3);
  String m4(p1, p2);
  String m5(p1, [int p2 = 2, int p3, p4 = 4]);
  String m6(p1, {int p2 = 2, int p3, p4: 4});
}

class B extends A {
  @override
  m1() {
    // TODO: implement m1
  }

  @override
  int m2() {
    // TODO: implement m2
  }

  @override
  String m3(int p1, double p2, Map<int, List<String>> p3) {
    // TODO: implement m3
  }

  @override
  String m4(p1, p2) {
    // TODO: implement m4
  }

  @override
  String m5(p1, [int p2 = 2, int p3, p4 = 4]) {
    // TODO: implement m5
  }

  @override
  String m6(p1, {int p2 = 2, int p3, p4 = 4}) {
    // TODO: implement m6
  }