Stop running pub get at gclient sync time and fix build bugs

mojo/public/dart/third_party/analyzer/test/generated/incremental_resolver_test.dart

+// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+library engine.incremental_resolver_test;
+
+import 'package:analyzer/src/context/cache.dart' as task;
+import 'package:analyzer/src/generated/ast.dart';
+import 'package:analyzer/src/generated/element.dart';
+import 'package:analyzer/src/generated/engine.dart';
+import 'package:analyzer/src/generated/error.dart';
+import 'package:analyzer/src/generated/incremental_logger.dart' as log;
+import 'package:analyzer/src/generated/incremental_resolution_validator.dart';
+import 'package:analyzer/src/generated/incremental_resolver.dart';
+import 'package:analyzer/src/generated/java_engine.dart';
+import 'package:analyzer/src/generated/parser.dart';
+import 'package:analyzer/src/generated/resolver.dart';
+import 'package:analyzer/src/generated/scanner.dart';
+import 'package:analyzer/src/generated/source_io.dart';
+import 'package:analyzer/src/generated/testing/ast_factory.dart';
+import 'package:analyzer/src/generated/testing/element_factory.dart';
+import 'package:analyzer/task/dart.dart';
+import 'package:unittest/unittest.dart';
+
+import '../reflective_tests.dart';
+import 'parser_test.dart';
+import 'resolver_test.dart';
+import 'test_support.dart';
+
+main() {
+  initializeTestEnvironment();
+  runReflectiveTests(DeclarationMatcherTest);
+  runReflectiveTests(IncrementalResolverTest);
+  runReflectiveTests(PoorMansIncrementalResolutionTest);
+  runReflectiveTests(ResolutionContextBuilderTest);
+}
+
+void initializeTestEnvironment() {}
+
+void _assertEqualError(AnalysisError incrError, AnalysisError fullError) {
+  expect(incrError.errorCode, same(fullError.errorCode));
+  expect(incrError.source, fullError.source);
+  expect(incrError.offset, fullError.offset);
+  expect(incrError.length, fullError.length);
+  expect(incrError.message, fullError.message);
+}
+
+void _assertEqualErrors(
+    List<AnalysisError> incrErrors, List<AnalysisError> fullErrors) {
+  expect(incrErrors, hasLength(fullErrors.length));
+  if (incrErrors.isNotEmpty) {
+    incrErrors.sort((a, b) => a.offset - b.offset);
+  }
+  if (fullErrors.isNotEmpty) {
+    fullErrors.sort((a, b) => a.offset - b.offset);
+  }
+  int length = incrErrors.length;
+  for (int i = 0; i < length; i++) {
+    AnalysisError incrError = incrErrors[i];
+    AnalysisError fullError = fullErrors[i];
+    _assertEqualError(incrError, fullError);
+  }
+}
+
+@reflectiveTest
+class DeclarationMatcherTest extends ResolverTestCase {
+  void setUp() {
+    super.setUp();
+    test_resolveApiChanges = true;
+  }
+
+  void test_false_class_annotation_accessor_edit() {
+    _assertDoesNotMatch(
+        r'''
+const my_annotationA = const Object();
+const my_annotationB = const Object();
+@my_annotationA
+class A {
+}
+''',
+        r'''
+const my_annotationA = const Object();
+const my_annotationB = const Object();
+@my_annotationB
+class A {
+}
+''');
+  }
+
+  void test_false_class_annotation_constructor_edit() {
+    _assertDoesNotMatch(
+        r'''
+class MyAnnotationA {
+  const MyAnnotationA();
+}
+class MyAnnotationB {
+  const MyAnnotationB();
+}
+@MyAnnotationA()
+class A {
+}
+''',
+        r'''
+class MyAnnotationA {
+  const MyAnnotationA();
+}
+class MyAnnotationB {
+  const MyAnnotationB();
+}
+@MyAnnotationB()
+class A {
+}
+''');
+  }
+
+  void test_false_class_annotations_add() {
+    _assertDoesNotMatch(
+        r'''
+const my_annotation = const Object();
+class A {
+}
+''',
+        r'''
+const my_annotation = const Object();
+@my_annotation
+class A {
+}
+''');
+  }
+
+  void test_false_class_annotations_remove() {
+    _assertDoesNotMatch(
+        r'''
+const my_annotation = const Object();
+@my_annotation
+class A {
+}
+''',
+        r'''
+const my_annotation = const Object();
+class A {
+}
+''');
+  }
+
+  void test_false_class_list_add() {
+    _assertDoesNotMatch(
+        r'''
+class A {}
+class B {}
+''',
+        r'''
+class A {}
+class B {}
+class C {}
+''');
+  }
+
+  void test_false_class_list_remove() {
+    _assertDoesNotMatch(
+        r'''
+class A {}
+class B {}
+class C {}
+''',
+        r'''
+class A {}
+class B {}
+''');
+  }
+
+  void test_false_class_typeParameters_bounds_add() {
+    _assertDoesNotMatch(
+        r'''
+class A {}
+class B<T> {
+  T f;
+}
+''',
+        r'''
+class A {}
+class B<T extends A> {
+  T f;
+}
+''');
+  }
+
+  void test_false_class_typeParameters_bounds_remove() {
+    _assertDoesNotMatch(
+        r'''
+class A {}
+class B<T extends A> {
+  T f;
+}
+''',
+        r'''
+class A {}
+class B<T> {
+  T f;
+}
+''');
+  }
+
+  void test_false_classMemberAccessor_list_add() {
+    _assertDoesNotMatchOK(
+        r'''
+class A {
+  get a => 1;
+  get b => 2;
+}
+''',
+        r'''
+class A {
+  get a => 1;
+  get b => 2;
+  get c => 3;
+}
+''');
+  }
+
+  void test_false_classMemberAccessor_list_remove() {
+    _assertDoesNotMatch(
+        r'''
+class A {
+  get a => 1;
+  get b => 2;
+  get c => 3;
+}
+''',
+        r'''
+class A {
+  get a => 1;
+  get b => 2;
+}
+''');
+  }
+
+  void test_false_classMemberAccessor_wasGetter() {
+    _assertDoesNotMatchOK(
+        r'''
+class A {
+  get a => 1;
+}
+''',
+        r'''
+class A {
+  set a(x) {}
+}
+''');
+  }
+
+  void test_false_classMemberAccessor_wasInstance() {
+    _assertDoesNotMatchOK(
+        r'''
+class A {
+  get a => 1;
+}
+''',
+        r'''
+class A {
+  static get a => 1;
+}
+''');
+  }
+
+  void test_false_classMemberAccessor_wasSetter() {
+    _assertDoesNotMatchOK(
+        r'''
+class A {
+  set a(x) {}
+}
+''',
+        r'''
+class A {
+  get a => 1;
+}
+''');
+  }
+
+  void test_false_classMemberAccessor_wasStatic() {
+    _assertDoesNotMatchOK(
+        r'''
+class A {
+  static get a => 1;
+}
+''',
+        r'''
+class A {
+  get a => 1;
+}
+''');
+  }
+
+  void test_false_classTypeAlias_list_add() {
+    _assertDoesNotMatch(
+        r'''
+class M {}
+class A = Object with M;
+''',
+        r'''
+class M {}
+class A = Object with M;
+class B = Object with M;
+''');
+  }
+
+  void test_false_classTypeAlias_list_remove() {
+    _assertDoesNotMatch(
+        r'''
+class M {}
+class A = Object with M;
+class B = Object with M;
+''',
+        r'''
+class M {}
+class A = Object with M;
+''');
+  }
+
+  void test_false_classTypeAlias_typeParameters_bounds_add() {
+    _assertDoesNotMatch(
+        r'''
+class M<T> {}
+class A {}
+class B<T> = Object with M<T>;
+''',
+        r'''
+class M<T> {}
+class A {}
+class B<T extends A> = Object with M<T>;
+''');
+  }
+
+  void test_false_classTypeAlias_typeParameters_bounds_remove() {
+    _assertDoesNotMatch(
+        r'''
+class M<T> {}
+class A {}
+class B<T extends A> = Object with M<T>;
+''',
+        r'''
+class M<T> {}
+class A {}
+class B<T> = Object with M<T>;
+''');
+  }
+
+  void test_false_constructor_keywordConst_add() {
+    _assertDoesNotMatch(
+        r'''
+class A {
+  A();
+}
+''',
+        r'''
+class A {
+  const A();
+}
+''');
+  }
+
+  void test_false_constructor_keywordConst_remove() {
+    _assertDoesNotMatch(
+        r'''
+class A {
+  const A();
+}
+''',
+        r'''
+class A {
+  A();
+}
+''');
+  }
+
+  void test_false_constructor_keywordFactory_add() {
+    _assertDoesNotMatch(
+        r'''
+class A {
+  A();
+  A.foo() {
+    return new A();
+  }
+}
+''',
+        r'''
+class A {
+  A();
+  factory A.foo() {
+    return new A();
+  }
+}
+''');
+  }
+
+  void test_false_constructor_keywordFactory_remove() {
+    _assertDoesNotMatch(
+        r'''
+class A {
+  A();
+  factory A.foo() {
+    return new A();
+  }
+}
+''',
+        r'''
+class A {
+  A();
+  A.foo() {
+    return new A();
+  }
+}
+''');
+  }
+
+  void test_false_constructor_parameters_list_add() {
+    _assertDoesNotMatch(
+        r'''
+class A {
+  A();
+}
+''',
+        r'''
+class A {
+  A(int p);
+}
+''');
+  }
+
+  void test_false_constructor_parameters_list_remove() {
+    _assertDoesNotMatch(
+        r'''
+class A {
+  A(int p);
+}
+''',
+        r'''
+class A {
+  A();
+}
+''');
+  }
+
+  void test_false_constructor_parameters_type_edit() {
+    _assertDoesNotMatch(
+        r'''
+class A {
+  A(int p);
+}
+''',
+        r'''
+class A {
+  A(String p);
+}
+''');
+  }
+
+  void test_false_constructor_unnamed_add_hadParameters() {
+    _assertDoesNotMatch(
+        r'''
+class A {
+}
+''',
+        r'''
+class A {
+  A(int p) {}
+}
+''');
+  }
+
+  void test_false_constructor_unnamed_remove_hadParameters() {
+    _assertDoesNotMatch(
+        r'''
+class A {
+  A(int p) {}
+}
+''',
+        r'''
+class A {
+}
+''');
+  }
+
+  void test_false_defaultFieldFormalParameterElement_wasSimple() {
+    _assertDoesNotMatch(
+        r'''
+class A {
+  int field;
+  A(int field);
+}
+''',
+        r'''
+class A {
+  int field;
+  A([this.field = 0]);
+}
+''');
+  }
+
+  void test_false_enum_constants_add() {
+    _assertDoesNotMatch(
+        r'''
+enum E {A, B}
+''',
+        r'''
+enum E {A, B, C}
+''');
+  }
+
+  void test_false_enum_constants_remove() {
+    _assertDoesNotMatch(
+        r'''
+enum E {A, B, C}
+''',
+        r'''
+enum E {A, B}
+''');
+  }
+
+  void test_false_export_hide_add() {
+    _assertDoesNotMatch(
+        r'''
+export 'dart:async' hide Future;
+''',
+        r'''
+export 'dart:async' hide Future, Stream;
+''');
+  }
+
+  void test_false_export_hide_remove() {
+    _assertDoesNotMatch(
+        r'''
+export 'dart:async' hide Future, Stream;
+''',
+        r'''
+export 'dart:async' hide Future;
+''');
+  }
+
+  void test_false_export_list_add() {
+    _assertDoesNotMatch(
+        r'''
+export 'dart:async';
+''',
+        r'''
+export 'dart:async';
+export 'dart:math';
+''');
+  }
+
+  void test_false_export_list_remove() {
+    _assertDoesNotMatch(
+        r'''
+export 'dart:async';
+export 'dart:math';
+''',
+        r'''
+export 'dart:async';
+''');
+  }
+
+  void test_false_export_show_add() {
+    _assertDoesNotMatch(
+        r'''
+export 'dart:async' show Future;
+''',
+        r'''
+export 'dart:async' show Future, Stream;
+''');
+  }
+
+  void test_false_export_show_remove() {
+    _assertDoesNotMatch(
+        r'''
+export 'dart:async' show Future, Stream;
+''',
+        r'''
+export 'dart:async' show Future;
+''');
+  }
+
+  void test_false_extendsClause_add() {
+    _assertDoesNotMatch(
+        r'''
+class A {}
+class B {}
+''',
+        r'''
+class A {}
+class B extends A {}
+''');
+  }
+
+  void test_false_extendsClause_different() {
+    _assertDoesNotMatch(
+        r'''
+class A {}
+class B {}
+class C extends A {}
+''',
+        r'''
+class A {}
+class B {}
+class C extends B {}
+''');
+  }
+
+  void test_false_extendsClause_remove() {
+    _assertDoesNotMatch(
+        r'''
+class A {}
+class B extends A{}
+''',
+        r'''
+class A {}
+class B {}
+''');
+  }
+
+  void test_false_field_list_add() {
+    _assertDoesNotMatch(
+        r'''
+class T {
+  int A = 1;
+  int C = 3;
+}
+''',
+        r'''
+class T {
+  int A = 1;
+  int B = 2;
+  int C = 3;
+}
+''');
+  }
+
+  void test_false_field_list_remove() {
+    _assertDoesNotMatch(
+        r'''
+class T {
+  int A = 1;
+  int B = 2;
+  int C = 3;
+}
+''',
+        r'''
+class T {
+  int A = 1;
+  int C = 3;
+}
+''');
+  }
+
+  void test_false_field_modifier_isConst() {
+    _assertDoesNotMatch(
+        r'''
+class T {
+  static final A = 1;
+}
+''',
+        r'''
+class T {
+  static const A = 1;
+}
+''');
+  }
+
+  void test_false_field_modifier_isFinal() {
+    _assertDoesNotMatch(
+        r'''
+class T {
+  int A = 1;
+}
+''',
+        r'''
+class T {
+  final int A = 1;
+}
+''');
+  }
+
+  void test_false_field_modifier_isStatic() {
+    _assertDoesNotMatch(
+        r'''
+class T {
+  int A = 1;
+}
+''',
+        r'''
+class T {
+  static int A = 1;
+}
+''');
+  }
+
+  void test_false_field_modifier_wasConst() {
+    _assertDoesNotMatch(
+        r'''
+class T {
+  static const A = 1;
+}
+''',
+        r'''
+class T {
+  static final A = 1;
+}
+''');
+  }
+
+  void test_false_field_modifier_wasFinal() {
+    _assertDoesNotMatch(
+        r'''
+class T {
+  final int A = 1;
+}
+''',
+        r'''
+class T {
+  int A = 1;
+}
+''');
+  }
+
+  void test_false_field_modifier_wasStatic() {
+    _assertDoesNotMatch(
+        r'''
+class T {
+  static int A = 1;
+}
+''',
+        r'''
+class T {
+  int A = 1;
+}
+''');
+  }
+
+  void test_false_field_type_differentArgs() {
+    _assertDoesNotMatch(
+        r'''
+class T {
+  List<int> A;
+}
+''',
+        r'''
+class T {
+  List<String> A;
+}
+''');
+  }
+
+  void test_false_fieldFormalParameter_add() {
+    _assertDoesNotMatch(
+        r'''
+class A {
+  final field;
+  A(field);
+}
+''',
+        r'''
+class A {
+  final field;
+  A(this.field);
+}
+''');
+  }
+
+  void test_false_fieldFormalParameter_add_function() {
+    _assertDoesNotMatch(
+        r'''
+class A {
+  final field;
+  A(field(a));
+}
+''',
+        r'''
+class A {
+  final field;
+  A(this.field(a));
+}
+''');
+  }
+
+  void test_false_fieldFormalParameter_parameters_add() {
+    _assertDoesNotMatch(
+        r'''
+class A {
+  final field;
+  A(this.field(a));
+}
+''',
+        r'''
+class A {
+  final field;
+  A(this.field(a, b));
+}
+''');
+  }
+
+  void test_false_fieldFormalParameter_parameters_remove() {
+    _assertDoesNotMatch(
+        r'''
+class A {
+  final field;
+  A(this.field(a, b));
+}
+''',
+        r'''
+class A {
+  final field;
+  A(this.field(a));
+}
+''');
+  }
+
+  void test_false_fieldFormalParameter_parameters_typeEdit() {
+    _assertDoesNotMatch(
+        r'''
+class A {
+  final field;
+  A(this.field(int p));
+}
+''',
+        r'''
+class A {
+  final field;
+  A(this.field(String p));
+}
+''');
+  }
+
+  void test_false_fieldFormalParameter_remove_default() {
+    _assertDoesNotMatch(
+        r'''
+class A {
+  final field;
+  A([this.field = 0]);
+}
+''',
+        r'''
+class A {
+  final field;
+  A([field = 0]);
+}
+''');
+  }
+
+  void test_false_fieldFormalParameter_remove_function() {
+    _assertDoesNotMatch(
+        r'''
+class A {
+  final field;
+  A(this.field(a));
+}
+''',
+        r'''
+class A {
+  final field;
+  A(field(a));
+}
+''');
+  }
+
+  void test_false_fieldFormalParameter_remove_normal() {
+    _assertDoesNotMatch(
+        r'''
+class A {
+  final field;
+  A(this.field);
+}
+''',
+        r'''
+class A {
+  final field;
+  A(field);
+}
+''');
+  }
+
+  void test_false_fieldFormalParameterElement_wasSimple() {
+    _assertDoesNotMatch(
+        r'''
+class A {
+  int field;
+  A(int field);
+}
+''',
+        r'''
+class A {
+  int field;
+  A(this.field);
+}
+''');
+  }
+
+  void test_false_final_type_different() {
+    _assertDoesNotMatch(
+        r'''
+class T {
+  int A;
+}
+''',
+        r'''
+class T {
+  String A;
+}
+''');
+  }
+
+  void test_false_function_async_add() {
+    _assertDoesNotMatch(
+        r'''
+main() {}
+''',
+        r'''
+main() async {}
+''');
+  }
+
+  void test_false_function_async_remove() {
+    _assertDoesNotMatch(
+        r'''
+main() async {}
+''',
+        r'''
+main() {}
+''');
+  }
+
+  void test_false_function_generator_add() {
+    _assertDoesNotMatch(
+        r'''
+main() async {}
+''',
+        r'''
+main() async* {}
+''');
+  }
+
+  void test_false_function_generator_remove() {
+    _assertDoesNotMatch(
+        r'''
+main() async* {}
+''',
+        r'''
+main() async {}
+''');
+  }
+
+  void test_false_functionTypeAlias_list_add() {
+    _assertDoesNotMatch(
+        r'''
+typedef A(int pa);
+typedef B(String pb);
+''',
+        r'''
+typedef A(int pa);
+typedef B(String pb);
+typedef C(pc);
+''');
+  }
+
+  void test_false_functionTypeAlias_list_remove() {
+    _assertDoesNotMatch(
+        r'''
+typedef A(int pa);
+typedef B(String pb);
+typedef C(pc);
+''',
+        r'''
+typedef A(int pa);
+typedef B(String pb);
+''');
+  }
+
+  void test_false_functionTypeAlias_parameters_list_add() {
+    _assertDoesNotMatch(
+        r'''
+typedef A(a);
+''',
+        r'''
+typedef A(a, b);
+''');
+  }
+
+  void test_false_functionTypeAlias_parameters_list_remove() {
+    _assertDoesNotMatch(
+        r'''
+typedef A(a, b);
+''',
+        r'''
+typedef A(a);
+''');
+  }
+
+  void test_false_functionTypeAlias_parameters_type_edit() {
+    _assertDoesNotMatch(
+        r'''
+typedef A(int p);
+''',
+        r'''
+typedef A(String p);
+''');
+  }
+
+  void test_false_functionTypeAlias_returnType_edit() {
+    _assertDoesNotMatch(
+        r'''
+typedef int A();
+''',
+        r'''
+typedef String A();
+''');
+  }
+
+  void test_false_functionTypeAlias_typeParameters_bounds_add() {
+    _assertDoesNotMatch(
+        r'''
+class A {}
+typedef F<T>();
+''',
+        r'''
+class A {}
+typedef F<T extends A>();
+''');
+  }
+
+  void test_false_functionTypeAlias_typeParameters_bounds_edit() {
+    _assertDoesNotMatch(
+        r'''
+class A {}
+class B {}
+typedef F<T extends A>();
+''',
+        r'''
+class A {}
+typedef F<T extends B>();
+''');
+  }
+
+  void test_false_functionTypeAlias_typeParameters_bounds_remove() {
+    _assertDoesNotMatch(
+        r'''
+class A {}
+typedef F<T extends A>();
+''',
+        r'''
+class A {}
+typedef F<T>();
+''');
+  }
+
+  void test_false_functionTypeAlias_typeParameters_list_add() {
+    _assertDoesNotMatch(
+        r'''
+typedef F<A>();
+''',
+        r'''
+typedef F<A, B>();
+''');
+  }
+
+  void test_false_functionTypeAlias_typeParameters_list_remove() {
+    _assertDoesNotMatch(
+        r'''
+typedef F<A, B>();
+''',
+        r'''
+typedef F<A>();
+''');
+  }
+
+  void test_false_FunctionTypedFormalParameter_parameters_list_add() {
+    _assertDoesNotMatch(
+        r'''
+main(int callback(int a)) {
+}
+''',
+        r'''
+main(int callback(int a, String b)) {
+}
+''');
+  }
+
+  void test_false_FunctionTypedFormalParameter_parameters_list_remove() {
+    _assertDoesNotMatch(
+        r'''
+main(int callback(int a, String b)) {
+}
+''',
+        r'''
+main(int callback(int a)) {
+}
+''');
+  }
+
+  void test_false_FunctionTypedFormalParameter_parameterType() {
+    _assertDoesNotMatch(
+        r'''
+main(int callback(int p)) {
+}
+''',
+        r'''
+main(int callback(String p)) {
+}
+''');
+  }
+
+  void test_false_FunctionTypedFormalParameter_returnType() {
+    _assertDoesNotMatch(
+        r'''
+main(int callback()) {
+}
+''',
+        r'''
+main(String callback()) {
+}
+''');
+  }
+
+  void test_false_FunctionTypedFormalParameter_wasSimple() {
+    _assertDoesNotMatch(
+        r'''
+main(int callback) {
+}
+''',
+        r'''
+main(int callback(int a, String b)) {
+}
+''');
+  }
+
+  void test_false_getter_body_add() {
+    _assertDoesNotMatchOK(
+        r'''
+class A {
+  int get foo;
+}
+''',
+        r'''
+class A {
+  int get foo => 0;
+}
+''');
+  }
+
+  void test_false_getter_body_remove() {
+    _assertDoesNotMatchOK(
+        r'''
+class A {
+  int get foo => 0;
+}
+''',
+        r'''
+class A {
+  int get foo;
+}
+''');
+  }
+
+  void test_false_implementsClause_add() {
+    _assertDoesNotMatch(
+        r'''
+class A {}
+class B {}
+''',
+        r'''
+class A {}
+class B implements A {}
+''');
+  }
+
+  void test_false_implementsClause_remove() {
+    _assertDoesNotMatch(
+        r'''
+class A {}
+class B implements A {}
+''',
+        r'''
+class A {}
+class B {}
+''');
+  }
+
+  void test_false_implementsClause_reorder() {
+    _assertDoesNotMatch(
+        r'''
+class A {}
+class B {}
+class C implements A, B {}
+''',
+        r'''
+class A {}
+class B {}
+class C implements B, A {}
+''');
+  }
+
+  void test_false_import_hide_add() {
+    _assertDoesNotMatch(
+        r'''
+import 'dart:async' hide Future;
+''',
+        r'''
+import 'dart:async' hide Future, Stream;
+''');
+  }
+
+  void test_false_import_hide_remove() {
+    _assertDoesNotMatch(
+        r'''
+import 'dart:async' hide Future, Stream;
+''',
+        r'''
+import 'dart:async' hide Future;
+''');
+  }
+
+  void test_false_import_list_add() {
+    _assertDoesNotMatch(
+        r'''
+import 'dart:async';
+''',
+        r'''
+import 'dart:async';
+import 'dart:math';
+''');
+  }
+
+  void test_false_import_list_remove() {
+    _assertDoesNotMatch(
+        r'''
+import 'dart:async';
+import 'dart:math';
+''',
+        r'''
+import 'dart:async';
+''');
+  }
+
+  void test_false_import_prefix_add() {
+    _assertDoesNotMatch(
+        r'''
+import 'dart:async';
+''',
+        r'''
+import 'dart:async' as async;
+''');
+  }
+
+  void test_false_import_prefix_edit() {
+    _assertDoesNotMatch(
+        r'''
+import 'dart:async' as oldPrefix;
+''',
+        r'''
+import 'dart:async' as newPrefix;
+''');
+  }
+
+  void test_false_import_prefix_remove() {
+    _assertDoesNotMatch(
+        r'''
+import 'dart:async' as async;
+''',
+        r'''
+import 'dart:async';
+''');
+  }
+
+  void test_false_import_show_add() {
+    _assertDoesNotMatch(
+        r'''
+import 'dart:async' show Future;
+''',
+        r'''
+import 'dart:async' show Future, Stream;
+''');
+  }
+
+  void test_false_import_show_remove() {
+    _assertDoesNotMatch(
+        r'''
+import 'dart:async' show Future, Stream;
+''',
+        r'''
+import 'dart:async' show Future;
+''');
+  }
+
+  void test_false_method_annotation_edit() {
+    _assertDoesNotMatchOK(
+        r'''
+const my_annotationA = const Object();
+const my_annotationB = const Object();
+class A {
+  @my_annotationA
+  void m() {}
+}
+''',
+        r'''
+const my_annotationA = const Object();
+const my_annotationB = const Object();
+class A {
+  @my_annotationB
+  void m() {}
+}
+''');
+  }
+
+  void test_false_method_annotations_add() {
+    _assertDoesNotMatchOK(
+        r'''
+const my_annotation = const Object();
+class A {
+  void m() {}
+}
+''',
+        r'''
+const my_annotation = const Object();
+class A {
+  @my_annotation
+  void m() {}
+}
+''');
+  }
+
+  void test_false_method_annotations_remove() {
+    _assertDoesNotMatchOK(
+        r'''
+const my_annotation = const Object();
+class A {
+  @my_annotation
+  void m() {}
+}
+''',
+        r'''
+const my_annotation = const Object();
+class A {
+  void m() {}
+}
+''');
+  }
+
+  void test_false_method_async_add() {
+    _assertDoesNotMatchOK(
+        r'''
+class A {
+  m() {}
+}
+''',
+        r'''
+class A {
+  m() async {}
+}
+''');
+  }
+
+  void test_false_method_async_remove() {
+    _assertDoesNotMatchOK(
+        r'''
+class A {
+  m() async {}
+}
+''',
+        r'''
+class A {
+  m() {}
+}
+''');
+  }
+
+  void test_false_method_body_add() {
+    _assertDoesNotMatchOK(
+        r'''
+class A {
+  void foo();
+}
+''',
+        r'''
+class A {
+  void foo() {}
+}
+''');
+  }
+
+  void test_false_method_body_remove() {
+    _assertDoesNotMatchOK(
+        r'''
+class A {
+  void foo() {}
+}
+''',
+        r'''
+class A {
+  void foo();
+}
+''');
+  }
+
+  void test_false_method_generator_add() {
+    _assertDoesNotMatchOK(
+        r'''
+class A {
+  m() async {}
+}
+''',
+        r'''
+class A {
+  m() async* {}
+}
+''');
+  }
+
+  void test_false_method_generator_remove() {
+    _assertDoesNotMatchOK(
+        r'''
+class A {
+  m() async* {}
+}
+''',
+        r'''
+class A {
+  m() async {}
+}
+''');
+  }
+
+  void test_false_method_list_add() {
+    _assertDoesNotMatchOK(
+        r'''
+class A {
+  a() {}
+  b() {}
+}
+''',
+        r'''
+class A {
+  a() {}
+  b() {}
+  c() {}
+}
+''');
+  }
+
+  void test_false_method_list_remove() {
+    _assertDoesNotMatch(
+        r'''
+class A {
+  a() {}
+  b() {}
+  c() {}
+}
+''',
+        r'''
+class A {
+  a() {}
+  b() {}
+}
+''');
+  }
+
+  void test_false_method_parameters_type_edit() {
+    _assertDoesNotMatchOK(
+        r'''
+class A {
+  m(int p) {
+  }
+}
+''',
+        r'''
+class A {
+  m(String p) {
+  }
+}
+''');
+  }
+
+  void test_false_method_parameters_type_edit_insertImportPrefix() {
+    _assertDoesNotMatchOK(
+        r'''
+import 'dart:async' as a;
+
+class C {
+  void foo(Future f) {}
+}
+
+class Future {}
+
+bar(C c, a.Future f) {
+  c.foo(f);
+}
+''',
+        r'''
+import 'dart:async' as a;
+
+class C {
+  void foo(a.Future f) {}
+}
+
+class Future {}
+
+bar(C c, a.Future f) {
+  c.foo(f);
+}
+''');
+  }
+
+  void test_false_method_returnType_edit() {
+    _assertDoesNotMatchOK(
+        r'''
+class A {
+  int m() {}
+}
+''',
+        r'''
+class A {
+  String m() {}
+}
+''');
+  }
+
+  void test_false_part_list_add() {
+    addNamedSource('/unitA.dart', 'part of lib; class A {}');
+    addNamedSource('/unitB.dart', 'part of lib; class B {}');
+    _assertDoesNotMatch(
+        r'''
+library lib;
+part 'unitA.dart';
+''',
+        r'''
+library lib;
+part 'unitA.dart';
+part 'unitB.dart';
+''');
+  }
+
+  void test_false_part_list_remove() {
+    addNamedSource('/unitA.dart', 'part of lib; class A {}');
+    addNamedSource('/unitB.dart', 'part of lib; class B {}');
+    _assertDoesNotMatch(
+        r'''
+library lib;
+part 'unitA.dart';
+part 'unitB.dart';
+''',
+        r'''
+library lib;
+part 'unitA.dart';
+''');
+  }
+
+  void test_false_SimpleFormalParameter_named_differentName() {
+    _assertDoesNotMatch(
+        r'''
+main({int oldName}) {
+}
+''',
+        r'''
+main({int newName}) {
+}
+''');
+  }
+
+  void test_false_SimpleFormalParameter_namedDefault_addValue() {
+    _assertDoesNotMatch(
+        r'''
+main({int p}) {
+}
+''',
+        r'''
+main({int p: 2}) {
+}
+''');
+  }
+
+  void test_false_SimpleFormalParameter_namedDefault_differentValue() {
+    _assertDoesNotMatch(
+        r'''
+main({int p: 1}) {
+}
+''',
+        r'''
+main({int p: 2}) {
+}
+''');
+  }
+
+  void test_false_SimpleFormalParameter_namedDefault_removeValue() {
+    _assertDoesNotMatch(
+        r'''
+main({int p: 1}) {
+}
+''',
+        r'''
+main({int p}) {
+}
+''');
+  }
+
+  void test_false_SimpleFormalParameter_optionalDefault_addValue() {
+    _assertDoesNotMatch(
+        r'''
+main([int p]) {
+}
+''',
+        r'''
+main([int p = 2]) {
+}
+''');
+  }
+
+  void test_false_SimpleFormalParameter_optionalDefault_differentValue() {
+    _assertDoesNotMatch(
+        r'''
+main([int p = 1]) {
+}
+''',
+        r'''
+main([int p = 2]) {
+}
+''');
+  }
+
+  void test_false_SimpleFormalParameter_optionalDefault_removeValue() {
+    _assertDoesNotMatch(
+        r'''
+main([int p = 1]) {
+}
+''',
+        r'''
+main([int p]) {
+}
+''');
+  }
+
+  void test_false_topLevelAccessor_list_add() {
+    _assertDoesNotMatch(
+        r'''
+get a => 1;
+get b => 2;
+''',
+        r'''
+get a => 1;
+get b => 2;
+get c => 3;
+''');
+  }
+
+  void test_false_topLevelAccessor_list_remove() {
+    _assertDoesNotMatch(
+        r'''
+get a => 1;
+get b => 2;
+get c => 3;
+''',
+        r'''
+get a => 1;
+get b => 2;
+''');
+  }
+
+  void test_false_topLevelAccessor_wasGetter() {
+    _assertDoesNotMatch(
+        r'''
+get a => 1;
+''',
+        r'''
+set a(x) {}
+''');
+  }
+
+  void test_false_topLevelAccessor_wasSetter() {
+    _assertDoesNotMatch(
+        r'''
+set a(x) {}
+''',
+        r'''
+get a => 1;
+''');
+  }
+
+  void test_false_topLevelFunction_list_add() {
+    _assertDoesNotMatch(
+        r'''
+a() {}
+b() {}
+''',
+        r'''
+a() {}
+b() {}
+c() {}
+''');
+  }
+
+  void test_false_topLevelFunction_list_remove() {
+    _assertDoesNotMatch(
+        r'''
+a() {}
+b() {}
+c() {}
+''',
+        r'''
+a() {}
+b() {}
+''');
+  }
+
+  void test_false_topLevelFunction_parameters_list_add() {
+    _assertDoesNotMatch(
+        r'''
+main(int a, int b) {
+}
+''',
+        r'''
+main(int a, int b, int c) {
+}
+''');
+  }
+
+  void test_false_topLevelFunction_parameters_list_remove() {
+    _assertDoesNotMatch(
+        r'''
+main(int a, int b, int c) {
+}
+''',
+        r'''
+main(int a, int b) {
+}
+''');
+  }
+
+  void test_false_topLevelFunction_parameters_type_edit() {
+    _assertDoesNotMatch(
+        r'''
+main(int a, int b, int c) {
+}
+''',
+        r'''
+main(int a, String b, int c) {
+}
+''');
+  }
+
+  void test_false_topLevelFunction_returnType_edit() {
+    _assertDoesNotMatch(
+        r'''
+int a() {}
+''',
+        r'''
+String a() {}
+''');
+  }
+
+  void test_false_topLevelVariable_list_add() {
+    _assertDoesNotMatch(
+        r'''
+const int A = 1;
+const int C = 3;
+''',
+        r'''
+const int A = 1;
+const int B = 2;
+const int C = 3;
+''');
+  }
+
+  void test_false_topLevelVariable_list_remove() {
+    _assertDoesNotMatch(
+        r'''
+const int A = 1;
+const int B = 2;
+const int C = 3;
+''',
+        r'''
+const int A = 1;
+const int C = 3;
+''');
+  }
+
+  void test_false_topLevelVariable_modifier_isConst() {
+    _assertDoesNotMatch(
+        r'''
+final int A = 1;
+''',
+        r'''
+const int A = 1;
+''');
+  }
+
+  void test_false_topLevelVariable_modifier_isFinal() {
+    _assertDoesNotMatch(
+        r'''
+int A = 1;
+''',
+        r'''
+final int A = 1;
+''');
+  }
+
+  void test_false_topLevelVariable_modifier_wasConst() {
+    _assertDoesNotMatch(
+        r'''
+const int A = 1;
+''',
+        r'''
+final int A = 1;
+''');
+  }
+
+  void test_false_topLevelVariable_modifier_wasFinal() {
+    _assertDoesNotMatch(
+        r'''
+final int A = 1;
+''',
+        r'''
+int A = 1;
+''');
+  }
+
+  void test_false_topLevelVariable_synthetic_wasGetter() {
+    _assertDoesNotMatch(
+        r'''
+int get A => 1;
+''',
+        r'''
+final int A = 1;
+''');
+  }
+
+  void test_false_topLevelVariable_type_different() {
+    _assertDoesNotMatch(
+        r'''
+int A;
+''',
+        r'''
+String A;
+''');
+  }
+
+  void test_false_topLevelVariable_type_differentArgs() {
+    _assertDoesNotMatch(
+        r'''
+List<int> A;
+''',
+        r'''
+List<String> A;
+''');
+  }
+
+  void test_false_type_noTypeArguments_hadTypeArguments() {
+    _assertDoesNotMatch(
+        r'''
+class A<T> {}
+A<int> main() {
+}
+''',
+        r'''
+class A<T> {}
+A main() {
+}
+''');
+  }
+
+  void test_false_withClause_add() {
+    _assertDoesNotMatch(
+        r'''
+class A {}
+class B {}
+''',
+        r'''
+class A {}
+class B extends Object with A {}
+''');
+  }
+
+  void test_false_withClause_remove() {
+    _assertDoesNotMatch(
+        r'''
+class A {}
+class B extends Object with A {}
+''',
+        r'''
+class A {}
+class B {}
+''');
+  }
+
+  void test_false_withClause_reorder() {
+    _assertDoesNotMatch(
+        r'''
+class A {}
+class B {}
+class C extends Object with A, B {}
+''',
+        r'''
+class A {}
+class B {}
+class C extends Object with B, A {}
+''');
+  }
+
+  void test_true_class_annotations_same() {
+    _assertMatches(
+        r'''
+const my_annotation = const Object();
+@my_annotation
+class A {
+}
+''',
+        r'''
+const my_annotation = const Object();
+@my_annotation
+class A {
+}
+''');
+  }
+
+  void test_true_class_list_reorder() {
+    _assertMatches(
+        r'''
+class A {}
+class B {}
+class C {}
+''',
+        r'''
+class C {}
+class A {}
+class B {}
+''');
+  }
+
+  void test_true_class_list_same() {
+    _assertMatches(
+        r'''
+class A {}
+class B {}
+class C {}
+''',
+        r'''
+class A {}
+class B {}
+class C {}
+''');
+  }
+
+  void test_true_class_typeParameters_same() {
+    _assertMatches(
+        r'''
+class A<T> {}
+''',
+        r'''
+class A<T> {}
+''');
+  }
+
+  void test_true_classMemberAccessor_getterSetter() {
+    _assertMatches(
+        r'''
+class A {
+  int _test;
+  get test => _test;
+  set test(v) {
+    _test = v;
+  }
+}
+''',
+        r'''
+class A {
+  int _test;
+  get test => _test;
+  set test(v) {
+    _test = v;
+  }
+}
+''');
+  }
+
+  void test_true_classMemberAccessor_list_reorder() {
+    _assertMatches(
+        r'''
+class A {
+  get a => 1;
+  get b => 2;
+  get c => 3;
+}
+''',
+        r'''
+class A {
+  get c => 3;
+  get a => 1;
+  get b => 2;
+}
+''');
+  }
+
+  void test_true_classMemberAccessor_list_same() {
+    _assertMatches(
+        r'''
+class A {
+  get a => 1;
+  get b => 2;
+  get c => 3;
+}
+''',
+        r'''
+class A {
+  get a => 1;
+  get b => 2;
+  get c => 3;
+}
+''');
+  }
+
+  void test_true_classTypeAlias_list_reorder() {
+    _assertMatches(
+        r'''
+class M {}
+class A = Object with M;
+class B = Object with M;
+class C = Object with M;
+''',
+        r'''
+class M {}
+class C = Object with M;
+class A = Object with M;
+class B = Object with M;
+''');
+  }
+
+  void test_true_classTypeAlias_list_same() {
+    _assertMatches(
+        r'''
+class M {}
+class A = Object with M;
+class B = Object with M;
+class C = Object with M;
+''',
+        r'''
+class M {}
+class A = Object with M;
+class B = Object with M;
+class C = Object with M;
+''');
+  }
+
+  void test_true_classTypeAlias_typeParameters_same() {
+    _assertMatches(
+        r'''
+class M<T> {}
+class A<T> {}
+class B<T> = A<T> with M<T>;
+''',
+        r'''
+class M<T> {}
+class A<T> {}
+class B<T> = A<T> with M<T>;
+''');
+  }
+
+  void test_true_constructor_body_add() {
+    _assertMatches(
+        r'''
+class A {
+  A(int p);
+}
+''',
+        r'''
+class A {
+  A(int p) {}
+}
+''');
+  }
+
+  void test_true_constructor_body_remove() {
+    _assertMatches(
+        r'''
+class A {
+  A(int p) {}
+}
+''',
+        r'''
+class A {
+  A(int p);
+}
+''');
+  }
+
+  void test_true_constructor_named_same() {
+    _assertMatches(
+        r'''
+class A {
+  A.name(int p);
+}
+''',
+        r'''
+class A {
+  A.name(int p);
+}
+''');
+  }
+
+  void test_true_constructor_unnamed_add_noParameters() {
+    _assertMatches(
+        r'''
+class A {
+}
+''',
+        r'''
+class A {
+  A() {}
+}
+''');
+  }
+
+  void test_true_constructor_unnamed_remove_noParameters() {
+    _assertMatches(
+        r'''
+class A {
+  A() {}
+}
+''',
+        r'''
+class A {
+}
+''');
+  }
+
+  void test_true_constructor_unnamed_same() {
+    _assertMatches(
+        r'''
+class A {
+  A(int p);
+}
+''',
+        r'''
+class A {
+  A(int p);
+}
+''');
+  }
+
+  void test_true_defaultFieldFormalParameterElement() {
+    _assertMatches(
+        r'''
+class A {
+  int field;
+  A([this.field = 0]);
+}
+''',
+        r'''
+class A {
+  int field;
+  A([this.field = 0]);
+}
+''');
+  }
+
+  void test_true_enum_constants_reorder() {
+    _assertMatches(
+        r'''
+enum E {A, B, C}
+''',
+        r'''
+enum E {C, A, B}
+''');
+  }
+
+  void test_true_enum_list_reorder() {
+    _assertMatches(
+        r'''
+enum A {A1, A2, A3}
+enum B {B1, B2, B3}
+enum C {C1, C2, C3}
+''',
+        r'''
+enum C {C1, C2, C3}
+enum A {A1, A2, A3}
+enum B {B1, B2, B3}
+''');
+  }
+
+  void test_true_enum_list_same() {
+    _assertMatches(
+        r'''
+enum A {A1, A2, A3}
+enum B {B1, B2, B3}
+enum C {C1, C2, C3}
+''',
+        r'''
+enum A {A1, A2, A3}
+enum B {B1, B2, B3}
+enum C {C1, C2, C3}
+''');
+  }
+
+  void test_true_executable_same_hasLabel() {
+    _assertMatches(
+        r'''
+main() {
+  label: return 42;
+}
+''',
+        r'''
+main() {
+  label: return 42;
+}
+''');
+  }
+
+  void test_true_executable_same_hasLocalVariable() {
+    _assertMatches(
+        r'''
+main() {
+  int a = 42;
+}
+''',
+        r'''
+main() {
+  int a = 42;
+}
+''');
+  }
+
+  void test_true_export_hide_reorder() {
+    _assertMatches(
+        r'''
+export 'dart:async' hide Future, Stream;
+''',
+        r'''
+export 'dart:async' hide Stream, Future;
+''');
+  }
+
+  void test_true_export_list_reorder() {
+    _assertMatches(
+        r'''
+export 'dart:async';
+export 'dart:math';
+''',
+        r'''
+export 'dart:math';
+export 'dart:async';
+''');
+  }
+
+  void test_true_export_list_same() {
+    _assertMatches(
+        r'''
+export 'dart:async';
+export 'dart:math';
+''',
+        r'''
+export 'dart:async';
+export 'dart:math';
+''');
+  }
+
+  void test_true_export_show_reorder() {
+    _assertMatches(
+        r'''
+export 'dart:async' show Future, Stream;
+''',
+        r'''
+export 'dart:async' show Stream, Future;
+''');
+  }
+
+  void test_true_extendsClause_same() {
+    _assertMatches(
+        r'''
+class A {}
+class B extends A {}
+''',
+        r'''
+class A {}
+class B extends A {}
+''');
+  }
+
+  void test_true_field_list_reorder() {
+    _assertMatches(
+        r'''
+class T {
+  int A = 1;
+  int B = 2;
+  int C = 3;
+}
+''',
+        r'''
+class T {
+  int C = 3;
+  int A = 1;
+  int B = 2;
+}
+''');
+  }
+
+  void test_true_field_list_same() {
+    _assertMatches(
+        r'''
+class T {
+  int A = 1;
+  int B = 2;
+  int C = 3;
+}
+''',
+        r'''
+class T {
+  int A = 1;
+  int B = 2;
+  int C = 3;
+}
+''');
+  }
+
+  void test_true_fieldFormalParameter() {
+    _assertMatches(
+        r'''
+class A {
+  int field;
+  A(this.field);
+}
+''',
+        r'''
+class A {
+  int field;
+  A(this.field);
+}
+''');
+  }
+
+  void test_true_fieldFormalParameter_function() {
+    _assertMatches(
+        r'''
+class A {
+  final field;
+  A(this.field(int a, String b));
+}
+''',
+        r'''
+class A {
+  final field;
+  A(this.field(int a, String b));
+}
+''');
+  }
+
+  void test_true_functionTypeAlias_list_reorder() {
+    _assertMatches(
+        r'''
+typedef A(int pa);
+typedef B(String pb);
+typedef C(pc);
+''',
+        r'''
+typedef C(pc);
+typedef A(int pa);
+typedef B(String pb);
+''');
+  }
+
+  void test_true_functionTypeAlias_list_same() {
+    _assertMatches(
+        r'''
+typedef String A(int pa);
+typedef int B(String pb);
+typedef C(pc);
+''',
+        r'''
+typedef String A(int pa);
+typedef int B(String pb);
+typedef C(pc);
+''');
+  }
+
+  void test_true_functionTypeAlias_typeParameters_list_same() {
+    _assertMatches(
+        r'''
+typedef F<A, B, C>();
+''',
+        r'''
+typedef F<A, B, C>();
+''');
+  }
+
+  void test_true_FunctionTypedFormalParameter() {
+    _assertMatches(
+        r'''
+main(int callback(int a, String b)) {
+}
+''',
+        r'''
+main(int callback(int a, String b)) {
+}
+''');
+  }
+
+  void test_true_implementsClause_same() {
+    _assertMatches(
+        r'''
+class A {}
+class B implements A {}
+''',
+        r'''
+class A {}
+class B implements A {}
+''');
+  }
+
+  void test_true_import_hide_reorder() {
+    _assertMatches(
+        r'''
+import 'dart:async' hide Future, Stream;
+''',
+        r'''
+import 'dart:async' hide Stream, Future;
+''');
+  }
+
+  void test_true_import_list_reorder() {
+    _assertMatches(
+        r'''
+import 'dart:async';
+import 'dart:math';
+''',
+        r'''
+import 'dart:math';
+import 'dart:async';
+''');
+  }
+
+  void test_true_import_list_same() {
+    _assertMatches(
+        r'''
+import 'dart:async';
+import 'dart:math';
+''',
+        r'''
+import 'dart:async';
+import 'dart:math';
+''');
+  }
+
+  void test_true_import_prefix() {
+    _assertMatches(
+        r'''
+import 'dart:async' as async;
+''',
+        r'''
+import 'dart:async' as async;
+''');
+  }
+
+  void test_true_import_show_reorder() {
+    _assertMatches(
+        r'''
+import 'dart:async' show Future, Stream;
+''',
+        r'''
+import 'dart:async' show Stream, Future;
+''');
+  }
+
+  void test_true_method_annotation_accessor_same() {
+    _assertMatches(
+        r'''
+const my_annotation = const Object();
+class A {
+  @my_annotation
+  void m() {}
+}
+''',
+        r'''
+const my_annotation = const Object();
+class A {
+  @my_annotation
+  void m() {}
+}
+''');
+  }
+
+  void test_true_method_annotation_constructor_same() {
+    _assertMatches(
+        r'''
+class MyAnnotation {
+  const MyAnnotation();
+}
+class A {
+  @MyAnnotation()
+  void m() {}
+}
+''',
+        r'''
+class MyAnnotation {
+  const MyAnnotation();
+}
+class A {
+  @MyAnnotation()
+  void m() {}
+}
+''');
+  }
+
+  void test_true_method_async() {
+    _assertMatches(
+        r'''
+class A {
+  m() async {}
+}
+''',
+        r'''
+class A {
+  m() async {}
+}
+''');
+  }
+
+  void test_true_method_list_reorder() {
+    _assertMatches(
+        r'''
+class A {
+  a() {}
+  b() {}
+  c() {}
+}
+''',
+        r'''
+class A {
+  c() {}
+  a() {}
+  b() {}
+}
+''');
+  }
+
+  void test_true_method_list_same() {
+    _assertMatches(
+        r'''
+class A {
+  a() {}
+  b() {}
+  c() {}
+}
+''',
+        r'''
+class A {
+  a() {}
+  b() {}
+  c() {}
+}
+''');
+  }
+
+  void test_true_method_operator_minus() {
+    _assertMatches(
+        r'''
+class A {
+  operator -(other) {}
+}
+''',
+        r'''
+class A {
+  operator -(other) {}
+}
+''');
+  }
+
+  void test_true_method_operator_minusUnary() {
+    _assertMatches(
+        r'''
+class A {
+  operator -() {}
+}
+''',
+        r'''
+class A {
+  operator -() {}
+}
+''');
+  }
+
+  void test_true_method_operator_plus() {
+    _assertMatches(
+        r'''
+class A {
+  operator +(other) {}
+}
+''',
+        r'''
+class A {
+  operator +(other) {}
+}
+''');
+  }
+
+  void test_true_method_parameters_type_functionType() {
+    _assertMatches(
+        r'''
+typedef F();
+class A {
+  m(F p) {}
+}
+''',
+        r'''
+typedef F();
+class A {
+  m(F p) {}
+}
+''');
+  }
+
+  void test_true_method_parameters_type_sameImportPrefix() {
+    _assertMatches(
+        r'''
+import 'dart:async' as a;
+
+bar(a.Future f) {
+  print(f);
+}
+''',
+        r'''
+import 'dart:async' as a;
+
+bar(a.Future ff) {
+  print(ff);
+}
+''');
+  }
+
+  void test_true_part_list_reorder() {
+    addNamedSource('/unitA.dart', 'part of lib; class A {}');
+    addNamedSource('/unitB.dart', 'part of lib; class B {}');
+    _assertMatches(
+        r'''
+library lib;
+part 'unitA.dart';
+part 'unitB.dart';
+''',
+        r'''
+library lib;
+part 'unitB.dart';
+part 'unitA.dart';
+''');
+  }
+
+  void test_true_part_list_same() {
+    addNamedSource('/unitA.dart', 'part of lib; class A {}');
+    addNamedSource('/unitB.dart', 'part of lib; class B {}');
+    _assertMatches(
+        r'''
+library lib;
+part 'unitA.dart';
+part 'unitB.dart';
+''',
+        r'''
+library lib;
+part 'unitA.dart';
+part 'unitB.dart';
+''');
+  }
+
+  void test_true_SimpleFormalParameter_optional_differentName() {
+    _assertMatches(
+        r'''
+main([int oldName]) {
+}
+''',
+        r'''
+main([int newName]) {
+}
+''');
+  }
+
+  void test_true_SimpleFormalParameter_optionalDefault_differentName() {
+    _assertMatches(
+        r'''
+main([int oldName = 1]) {
+}
+''',
+        r'''
+main([int newName = 1]) {
+}
+''');
+  }
+
+  void test_true_SimpleFormalParameter_required_differentName() {
+    _assertMatches(
+        r'''
+main(int oldName) {
+}
+''',
+        r'''
+main(int newName) {
+}
+''');
+  }
+
+  void test_true_topLevelAccessor_list_reorder() {
+    _assertMatches(
+        r'''
+set a(x) {}
+set b(x) {}
+set c(x) {}
+''',
+        r'''
+set c(x) {}
+set a(x) {}
+set b(x) {}
+''');
+  }
+
+  void test_true_topLevelAccessor_list_same() {
+    _assertMatches(
+        r'''
+get a => 1;
+get b => 2;
+get c => 3;
+''',
+        r'''
+get a => 1;
+get b => 2;
+get c => 3;
+''');
+  }
+
+  void test_true_topLevelFunction_list_reorder() {
+    _assertMatches(
+        r'''
+a() {}
+b() {}
+c() {}
+''',
+        r'''
+c() {}
+a() {}
+b() {}
+''');
+  }
+
+  void test_true_topLevelFunction_list_same() {
+    _assertMatches(
+        r'''
+a() {}
+b() {}
+c() {}
+''',
+        r'''
+a() {}
+b() {}
+c() {}
+''');
+  }
+
+  void test_true_topLevelVariable_list_reorder() {
+    _assertMatches(
+        r'''
+const int A = 1;
+const int B = 2;
+const int C = 3;
+''',
+        r'''
+const int C = 3;
+const int A = 1;
+const int B = 2;
+''');
+  }
+
+  void test_true_topLevelVariable_list_same() {
+    _assertMatches(
+        r'''
+const int A = 1;
+const int B = 2;
+const int C = 3;
+''',
+        r'''
+const int A = 1;
+const int B = 2;
+const int C = 3;
+''');
+  }
+
+  void test_true_topLevelVariable_type_sameArgs() {
+    _assertMatches(
+        r'''
+Map<int, String> A;
+''',
+        r'''
+Map<int, String> A;
+''');
+  }
+
+  void test_true_type_dynamic() {
+    _assertMatches(
+        r'''
+dynamic a() {}
+''',
+        r'''
+dynamic a() {}
+''');
+  }
+
+  void test_true_type_hasImportPrefix() {
+    _assertMatches(
+        r'''
+import 'dart:async' as async;
+async.Future F;
+''',
+        r'''
+import 'dart:async' as async;
+async.Future F;
+''');
+  }
+
+  void test_true_type_noTypeArguments_implyAllDynamic() {
+    _assertMatches(
+        r'''
+class A<T> {}
+A main() {
+}
+''',
+        r'''
+class A<T> {}
+A main() {
+}
+''');
+  }
+
+  void test_true_type_void() {
+    _assertMatches(
+        r'''
+void a() {}
+''',
+        r'''
+void a() {}
+''');
+  }
+
+  void test_true_withClause_same() {
+    _assertMatches(
+        r'''
+class A {}
+class B extends Object with A {}
+''',
+        r'''
+class A {}
+class B extends Object with A {}
+''');
+  }
+
+  void _assertDoesNotMatch(String oldContent, String newContent) {
+    _assertMatchKind(DeclarationMatchKind.MISMATCH, oldContent, newContent);
+  }
+
+  void _assertDoesNotMatchOK(String oldContent, String newContent) {
+    _assertMatchKind(DeclarationMatchKind.MISMATCH_OK, oldContent, newContent);
+  }
+
+  void _assertMatches(String oldContent, String newContent) {
+    _assertMatchKind(DeclarationMatchKind.MATCH, oldContent, newContent);
+  }
+
+  void _assertMatchKind(
+      DeclarationMatchKind expectMatch, String oldContent, String newContent) {
+    Source source = addSource(oldContent);
+    LibraryElement library = resolve2(source);
+    CompilationUnit oldUnit = resolveCompilationUnit(source, library);
+    // parse
+    CompilationUnit newUnit = ParserTestCase.parseCompilationUnit(newContent);
+    // build elements
+    {
+      ElementHolder holder = new ElementHolder();
+      ElementBuilder builder = new ElementBuilder(holder);
+      newUnit.accept(builder);
+    }
+    // match
+    DeclarationMatcher matcher = new DeclarationMatcher();
+    DeclarationMatchKind matchKind = matcher.matches(newUnit, oldUnit.element);
+    expect(matchKind, same(expectMatch));
+  }
+}
+
+@reflectiveTest
+class IncrementalResolverTest extends ResolverTestCase {
+  Source source;
+  String code;
+  LibraryElement library;
+  CompilationUnit unit;
+
+  @override
+  void reset() {
+    if (AnalysisEngine.instance.useTaskModel) {
+      analysisContext2 = AnalysisContextFactory.contextWithCore();
+    } else {
+      analysisContext2 = AnalysisContextFactory.oldContextWithCore();
+    }
+  }
+
+  @override
+  void resetWithOptions(AnalysisOptions options) {
+    if (AnalysisEngine.instance.useTaskModel) {
+      analysisContext2 =
+          AnalysisContextFactory.contextWithCoreAndOptions(options);
+    } else {
+      analysisContext2 =
+          AnalysisContextFactory.oldContextWithCoreAndOptions(options);
+    }
+  }
+
+  void setUp() {
+    super.setUp();
+    test_resolveApiChanges = true;
+    log.logger = log.NULL_LOGGER;
+  }
+
+  void test_classMemberAccessor_body() {
+    _resolveUnit(r'''
+class A {
+  int get test {
+    return 1 + 2;
+  }
+}''');
+    _resolve(_editString('+', '*'), _isFunctionBody);
+  }
+
+  void test_constructor_body() {
+    _resolveUnit(r'''
+class A {
+  int f;
+  A(int a, int b) {
+    f = a + b;
+  }
+}''');
+    _resolve(_editString('+', '*'), _isFunctionBody);
+  }
+
+  void test_constructor_fieldFormalParameter() {
+    _resolveUnit(r'''
+class A {
+  int xy;
+  A(this.x);
+}''');
+    _resolve(_editString('this.x', 'this.xy'), _isDeclaration);
+  }
+
+  void test_constructor_fieldInitializer_add() {
+    _resolveUnit(r'''
+class A {
+  int f;
+  A(int a, int b);
+}''');
+    _resolve(_editString(');', ') : f = a + b;'), _isClassMember);
+  }
+
+  void test_constructor_fieldInitializer_edit() {
+    _resolveUnit(r'''
+class A {
+  int f;
+  A(int a, int b) : f = a + b {
+    int a = 42;
+  }
+}''');
+    _resolve(_editString('+', '*'), _isExpression);
+  }
+
+  void test_constructor_label_add() {
+    _resolveUnit(r'''
+class A {
+  A() {
+    return 42;
+  }
+}
+''');
+    _resolve(_editString('return', 'label: return'), _isBlock);
+  }
+
+  void test_constructor_localVariable_add() {
+    _resolveUnit(r'''
+class A {
+  A() {
+    42;
+  }
+}
+''');
+    _resolve(_editString('42;', 'var res = 42;'), _isBlock);
+  }
+
+  void test_constructor_superConstructorInvocation() {
+    _resolveUnit(r'''
+class A {
+  A(int p);
+}
+class B extends A {
+  B(int a, int b) : super(a + b);
+}
+''');
+    _resolve(_editString('+', '*'), _isExpression);
+  }
+
+  void test_function_localFunction_add() {
+    _resolveUnit(r'''
+int main() {
+  return 0;
+}
+callIt(f) {}
+''');
+    _resolve(_editString('return 0;', 'callIt((p) {});'), _isBlock);
+  }
+
+  void test_functionBody_body() {
+    _resolveUnit(r'''
+main(int a, int b) {
+  return a + b;
+}''');
+    _resolve(_editString('+', '*'), _isFunctionBody);
+  }
+
+  void test_functionBody_expression() {
+    _resolveUnit(r'''
+main(int a, int b) => a + b;
+''');
+    _resolve(_editString('+', '*'), _isExpression);
+  }
+
+  void test_functionBody_statement() {
+    _resolveUnit(r'''
+main(int a, int b) {
+  return a + b;
+}''');
+    _resolve(_editString('+', '*'), _isStatement);
+  }
+
+  void test_method_body() {
+    _resolveUnit(r'''
+class A {
+  m(int a, int b) {
+    return a + b;
+  }
+}''');
+    _resolve(_editString('+', '*'), _isFunctionBody);
+  }
+
+  void test_method_label_add() {
+    _resolveUnit(r'''
+class A {
+  int m(int a, int b) {
+    return a + b;
+  }
+}
+''');
+    _resolve(_editString('return', 'label: return'), _isBlock);
+  }
+
+  void test_method_localFunction_add() {
+    _resolveUnit(r'''
+class A {
+  int m() {
+    return 0;
+  }
+}
+callIt(f) {}
+''');
+    _resolve(_editString('return 0;', 'callIt((p) {});'), _isBlock);
+  }
+
+  void test_method_localVariable_add() {
+    _resolveUnit(r'''
+class A {
+  int m(int a, int b) {
+    return a + b;
+  }
+}
+''');
+    _resolve(
+        _editString(
+            '    return a + b;',
+            r'''
+    int res = a + b;
+    return res;
+'''),
+        _isBlock);
+  }
+
+  void test_method_parameter_rename() {
+    _resolveUnit(r'''
+class A {
+  int m(int a, int b, int c) {
+    return a + b + c;
+  }
+}
+''');
+    _resolve(
+        _editString(
+            r'''(int a, int b, int c) {
+    return a + b + c;''',
+            r'''(int a, int second, int c) {
+    return a + second + c;'''),
+        _isDeclaration);
+  }
+
+  void test_superInvocation() {
+    _resolveUnit(r'''
+class A {
+  foo(p) {}
+}
+class B extends A {
+  bar() {
+    super.foo(1 + 2);
+  }
+}''');
+    _resolve(_editString('+', '*'), _isFunctionBody);
+  }
+
+  void test_topLevelAccessor_body() {
+    _resolveUnit(r'''
+int get test {
+  return 1 + 2;
+}''');
+    _resolve(_editString('+', '*'), _isFunctionBody);
+  }
+
+  void test_topLevelFunction_label_add() {
+    _resolveUnit(r'''
+int main(int a, int b) {
+  return a + b;
+}
+''');
+    _resolve(_editString('  return', 'label: return a + b;'), _isBlock);
+  }
+
+  void test_topLevelFunction_label_remove() {
+    _resolveUnit(r'''
+int main(int a, int b) {
+  label: return a + b;
+}
+''');
+    _resolve(_editString('label: ', ''), _isBlock);
+  }
+
+  void test_topLevelFunction_localVariable_add() {
+    _resolveUnit(r'''
+int main(int a, int b) {
+  return a + b;
+}
+''');
+    _resolve(
+        _editString(
+            '  return a + b;',
+            r'''
+  int res = a + b;
+  return res;
+'''),
+        _isBlock);
+  }
+
+  void test_topLevelFunction_localVariable_remove() {
+    _resolveUnit(r'''
+int main(int a, int b) {
+  int res = a * b;
+  return a + b;
+}
+''');
+    _resolve(_editString('int res = a * b;', ''), _isBlock);
+  }
+
+  void test_topLevelFunction_parameter_inFunctionTyped_rename() {
+    _resolveUnit(r'''
+test(f(int a, int b)) {
+}
+''');
+    _resolve(_editString('test(f(int a', 'test(f2(int a2'), _isDeclaration);
+  }
+
+  void test_topLevelFunction_parameter_rename() {
+    _resolveUnit(r'''
+int main(int a, int b) {
+  return a + b;
+}
+''');
+    _resolve(
+        _editString(
+            r'''(int a, int b) {
+  return a + b;''',
+            r'''(int first, int b) {
+  return first + b;'''),
+        _isDeclaration);
+  }
+
+  void test_topLevelVariable_initializer() {
+    _resolveUnit(r'''
+int C = 1 + 2;
+''');
+    _resolve(_editString('+', '*'), _isExpression);
+  }
+
+  void test_updateElementOffset() {
+    _resolveUnit(r'''
+class A {
+  int am(String ap) {
+    int av = 1;
+    return av;
+  }
+}
+main(int a, int b) {
+  return a + b;
+}
+class B {
+  int bm(String bp) {
+    int bv = 1;
+    return bv;
+  }
+}
+''');
+    _resolve(_editString('+', ' + '), _isStatement);
+  }
+
+  _Edit _editString(String search, String replacement, [int length]) {
+    int offset = code.indexOf(search);
+    expect(offset, isNot(-1));
+    if (length == null) {
+      length = search.length;
+    }
+    return new _Edit(offset, length, replacement);
+  }
+
+  /**
+   * Applies [edit] to [code], find the [AstNode] specified by [predicate]
+   * and incrementally resolves it.
+   *
+   * Then resolves the new code from scratch and validates that results of
+   * the incremental resolution and non-incremental resolutions are the same.
+   */
+  void _resolve(_Edit edit, Predicate<AstNode> predicate) {
+    int offset = edit.offset;
+    // parse "newCode"
+    String newCode = code.substring(0, offset) +
+        edit.replacement +
+        code.substring(offset + edit.length);
+    CompilationUnit newUnit = _parseUnit(newCode);
+    // replace the node
+    AstNode oldNode = _findNodeAt(unit, offset, predicate);
+    AstNode newNode = _findNodeAt(newUnit, offset, predicate);
+    {
+      bool success = NodeReplacer.replace(oldNode, newNode);
+      expect(success, isTrue);
+    }
+    // update tokens
+    {
+      int delta = edit.replacement.length - edit.length;
+      _shiftTokens(unit.beginToken, offset, delta);
+    }
+    // do incremental resolution
+    int updateOffset = edit.offset;
+    int updateEndOld = updateOffset + edit.length;
+    int updateOldNew = updateOffset + edit.replacement.length;
+    IncrementalResolver resolver;
+    if (AnalysisEngine.instance.useTaskModel) {
+      LibrarySpecificUnit lsu = new LibrarySpecificUnit(source, source);
+      task.AnalysisCache cache = analysisContext2.analysisCache;
+      resolver = new IncrementalResolver(
+          null,
+          cache.get(source),
+          cache.get(lsu),
+          unit.element,
+          updateOffset,
+          updateEndOld,
+          updateOldNew);
+    } else {
+      resolver = new IncrementalResolver(
+          (analysisContext2 as AnalysisContextImpl)
+              .getReadableSourceEntryOrNull(source),
+          null,
+          null,
+          unit.element,
+          updateOffset,
+          updateEndOld,
+          updateOldNew);
+    }
+    bool success = resolver.resolve(newNode);
+    expect(success, isTrue);
+    List<AnalysisError> newErrors = analysisContext.computeErrors(source);
+    // resolve "newCode" from scratch
+    CompilationUnit fullNewUnit;
+    {
+      source = addSource(newCode);
+      _runTasks();
+      LibraryElement library = resolve2(source);
+      fullNewUnit = resolveCompilationUnit(source, library);
+    }
+    try {
+      assertSameResolution(unit, fullNewUnit);
+    } on IncrementalResolutionMismatch catch (mismatch) {
+      fail(mismatch.message);
+    }
+    // errors
+    List<AnalysisError> newFullErrors =
+        analysisContext.getErrors(source).errors;
+    _assertEqualErrors(newErrors, newFullErrors);
+    // prepare for the next cycle
+    code = newCode;
+  }
+
+  void _resolveUnit(String code) {
+    this.code = code;
+    source = addSource(code);
+    library = resolve2(source);
+    unit = resolveCompilationUnit(source, library);
+    _runTasks();
+  }
+
+  void _runTasks() {
+    AnalysisResult result = analysisContext.performAnalysisTask();
+    while (result.changeNotices != null) {
+      result = analysisContext.performAnalysisTask();
+    }
+  }
+
+  static AstNode _findNodeAt(
+      CompilationUnit oldUnit, int offset, Predicate<AstNode> predicate) {
+    NodeLocator locator = new NodeLocator(offset);
+    AstNode node = locator.searchWithin(oldUnit);
+    return node.getAncestor(predicate);
+  }
+
+  static bool _isBlock(AstNode node) => node is Block;
+
+  static bool _isClassMember(AstNode node) => node is ClassMember;
+
+  static bool _isDeclaration(AstNode node) => node is Declaration;
+
+  static bool _isExpression(AstNode node) => node is Expression;
+
+  static bool _isFunctionBody(AstNode node) => node is FunctionBody;
+
+  static bool _isStatement(AstNode node) => node is Statement;
+
+  static CompilationUnit _parseUnit(String code) {
+    var errorListener = new BooleanErrorListener();
+    var reader = new CharSequenceReader(code);
+    var scanner = new Scanner(null, reader, errorListener);
+    var token = scanner.tokenize();
+    var parser = new Parser(null, errorListener);
+    return parser.parseCompilationUnit(token);
+  }
+
+  static void _shiftTokens(Token token, int afterOffset, int delta) {
+    while (token.type != TokenType.EOF) {
+      if (token.offset >= afterOffset) {
+        token.applyDelta(delta);
+      }
+      token = token.next;
+    }
+  }
+}
+
+/**
+ * The test for [poorMansIncrementalResolution] function and its integration
+ * into [AnalysisContext].
+ */
+@reflectiveTest
+class PoorMansIncrementalResolutionTest extends ResolverTestCase {
+  Source source;
+  String code;
+  LibraryElement oldLibrary;
+  CompilationUnit oldUnit;
+  CompilationUnitElement oldUnitElement;
+
+  void fail_updateErrors_removeExisting_duplicateMethodDeclaration() {
+    // TODO(scheglov) We fail to remove the second "foo" declaration.
+    // So, we still have the same duplicate declaration problem.
+    _resolveUnit(r'''
+class A {
+  void foo() {}
+  void foo() {}
+}
+''');
+    _updateAndValidate(r'''
+class A {
+  void foo() {}
+  void foo2() {}
+}
+''');
+  }
+
+  void setUp() {
+    super.setUp();
+    _resetWithIncremental(true);
+  }
+
+  void test_computeConstants() {
+    _resolveUnit(r'''
+int f() => 0;
+main() {
+  const x = f();
+  print(x + 1);
+}
+''');
+    _updateAndValidate(r'''
+int f() => 0;
+main() {
+  const x = f();
+  print(x + 2);
+}
+''');
+  }
+
+  void test_dartDoc_beforeField() {
+    _resolveUnit(r'''
+class A {
+  /**
+   * A field [field] of type [int] in class [A].
+   */
+  int field;
+}
+''');
+    _updateAndValidate(r'''
+class A {
+  /**
+   * A field [field] of the type [int] in the class [A].
+   * Updated, with a reference to the [String] type.
+   */
+  int field;
+}
+''');
+  }
+
+  void test_dartDoc_clumsy_addReference() {
+    _resolveUnit(r'''
+/**
+ * aaa bbbb
+ */
+main() {
+}
+''');
+    _updateAndValidate(r'''
+/**
+ * aaa [main] bbbb
+ */
+main() {
+}
+''');
+  }
+
+  void test_dartDoc_clumsy_removeReference() {
+    _resolveUnit(r'''
+/**
+ * aaa [main] bbbb
+ */
+main() {
+}
+''');
+    _updateAndValidate(r'''
+/**
+ * aaa bbbb
+ */
+main() {
+}
+''');
+  }
+
+  void test_dartDoc_clumsy_updateText_beforeKeywordToken() {
+    _resolveUnit(r'''
+/**
+ * A comment with the [int] type reference.
+ */
+class A {}
+''');
+    _updateAndValidate(r'''
+/**
+ * A comment with the [int] type reference.
+ * Plus reference to [A] itself.
+ */
+class A {}
+''');
+  }
+
+  void test_dartDoc_clumsy_updateText_insert() {
+    _resolveUnit(r'''
+/**
+ * A function [main] with a parameter [p] of type [int].
+ */
+main(int p) {
+  unresolvedFunctionProblem();
+}
+/**
+ * Other comment with [int] reference.
+ */
+foo() {}
+''');
+    _updateAndValidate(r'''
+/**
+ * A function [main] with a parameter [p] of type [int].
+ * Inserted text with [String] reference.
+ */
+main(int p) {
+  unresolvedFunctionProblem();
+}
+/**
+ * Other comment with [int] reference.
+ */
+foo() {}
+''');
+  }
+
+  void test_dartDoc_clumsy_updateText_remove() {
+    _resolveUnit(r'''
+/**
+ * A function [main] with a parameter [p] of type [int].
+ * Some text with [String] reference to remove.
+ */
+main(int p) {
+}
+/**
+ * Other comment with [int] reference.
+ */
+foo() {}
+''');
+    _updateAndValidate(r'''
+/**
+ * A function [main] with a parameter [p] of type [int].
+ */
+main(int p) {
+}
+/**
+ * Other comment with [int] reference.
+ */
+foo() {}
+''');
+  }
+
+  void test_dartDoc_elegant_addReference() {
+    _resolveUnit(r'''
+/// aaa bbb
+main() {
+  return 1;
+}
+''');
+    _updateAndValidate(r'''
+/// aaa [main] bbb
+/// ccc [int] ddd
+main() {
+  return 1;
+}
+''');
+  }
+
+  void test_dartDoc_elegant_removeReference() {
+    _resolveUnit(r'''
+/// aaa [main] bbb
+/// ccc [int] ddd
+main() {
+  return 1;
+}
+''');
+    _updateAndValidate(r'''
+/// aaa bbb
+main() {
+  return 1;
+}
+''');
+  }
+
+  void test_dartDoc_elegant_updateText_insertToken() {
+    _resolveUnit(r'''
+/// A
+/// [int]
+class Test {
+}
+''');
+    _updateAndValidate(r'''
+/// A
+///
+/// [int]
+class Test {
+}
+''');
+  }
+
+  void test_dartDoc_elegant_updateText_removeToken() {
+    _resolveUnit(r'''
+/// A
+///
+/// [int]
+class Test {
+}
+''');
+    _updateAndValidate(r'''
+/// A
+/// [int]
+class Test {
+}
+''');
+  }
+
+  void test_endOfLineComment_add_beforeKeywordToken() {
+    _resolveUnit(r'''
+main() {
+  var v = 42;
+}
+''');
+    _updateAndValidate(r'''
+main() {
+  // some comment
+  var v = 42;
+}
+''');
+  }
+
+  void test_endOfLineComment_add_beforeStringToken() {
+    _resolveUnit(r'''
+main() {
+  print(0);
+}
+''');
+    _updateAndValidate(r'''
+main() {
+  // some comment
+  print(0);
+}
+''');
+  }
+
+  void test_endOfLineComment_edit() {
+    _resolveUnit(r'''
+main() {
+  // some comment
+  print(0);
+}
+''');
+    _updateAndValidate(r'''
+main() {
+  // edited comment text
+  print(0);
+}
+''');
+  }
+
+  void test_endOfLineComment_localFunction_inTopLevelVariable() {
+    _resolveUnit(r'''
+typedef int Binary(one, two, three);
+
+int Global = f((a, b, c) {
+  return 0; // Some comment
+});
+''');
+    _updateAndValidate(r'''
+typedef int Binary(one, two, three);
+
+int Global = f((a, b, c) {
+  return 0; // Some  comment
+});
+''');
+  }
+
+  void test_endOfLineComment_outBody_add() {
+    _resolveUnit(r'''
+main() {
+  Object x;
+  x.foo();
+}
+''');
+    _updateAndValidate(
+        r'''
+// 000
+main() {
+  Object x;
+  x.foo();
+}
+''',
+        expectedSuccess: false);
+  }
+
+  void test_endOfLineComment_outBody_remove() {
+    _resolveUnit(r'''
+// 000
+main() {
+  Object x;
+  x.foo();
+}
+''');
+    _updateAndValidate(
+        r'''
+main() {
+  Object x;
+  x.foo();
+}
+''',
+        expectedSuccess: false);
+  }
+
+  void test_endOfLineComment_outBody_update() {
+    _resolveUnit(r'''
+// 000
+main() {
+  Object x;
+  x.foo();
+}
+''');
+    _updateAndValidate(
+        r'''
+// 10
+main() {
+  Object x;
+  x.foo();
+}
+''',
+        expectedSuccess: false);
+  }
+
+  void test_endOfLineComment_remove() {
+    _resolveUnit(r'''
+main() {
+  // some comment
+  print(0);
+}
+''');
+    _updateAndValidate(r'''
+main() {
+  print(0);
+}
+''');
+  }
+
+  void test_false_constConstructor_initializer() {
+    _resolveUnit(r'''
+class C {
+  final int x;
+  const C(this.x);
+  const C.foo() : x = 0;
+}
+main() {
+  const {const C(0): 0, const C.foo(): 1};
+}
+''');
+    _updateAndValidate(
+        r'''
+class C {
+  final int x;
+  const C(this.x);
+  const C.foo() : x = 1;
+}
+main() {
+  const {const C(0): 0, const C.foo(): 1};
+}
+''',
+        expectedSuccess: false);
+  }
+
+  void test_false_expressionBody() {
+    _resolveUnit(r'''
+class A {
+  final f = (() => 1)();
+}
+''');
+    _updateAndValidate(
+        r'''
+class A {
+  final f = (() => 2)();
+}
+''',
+        expectedSuccess: false);
+  }
+
+  void test_false_topLevelFunction_name() {
+    _resolveUnit(r'''
+a() {}
+b() {}
+''');
+    _updateAndValidate(
+        r'''
+a() {}
+bb() {}
+''',
+        expectedSuccess: false);
+  }
+
+  void test_false_unbalancedCurlyBrackets_inNew() {
+    _resolveUnit(r'''
+class A {
+  aaa() {
+    if (true) {
+      1;
+    }
+  }
+
+  bbb() {
+    print(0123456789);
+  }
+}''');
+    _updateAndValidate(
+        r'''
+class A {
+  aaa() {
+      1;
+    }
+  }
+
+  bbb() {
+    print(0123456789);
+  }
+}''',
+        expectedSuccess: false);
+  }
+
+  void test_false_unbalancedCurlyBrackets_inOld() {
+    _resolveUnit(r'''
+class A {
+  aaa() {
+      1;
+    }
+  }
+
+  bbb() {
+    print(0123456789);
+  }
+}''');
+    _updateAndValidate(
+        r'''
+class A {
+  aaa() {
+    if (true) {
+      1;
+    }
+  }
+
+  bbb() {
+    print(0123456789);
+  }
+}''',
+        expectedSuccess: false);
+  }
+
+  void test_fieldClassField_propagatedType() {
+    _resolveUnit(r'''
+class A {
+  static const A b = const B();
+  const A();
+}
+
+class B extends A {
+  const B();
+}
+
+main() {
+  print(12);
+  A.b;
+}
+''');
+    _updateAndValidate(r'''
+class A {
+  static const A b = const B();
+  const A();
+}
+
+class B extends A {
+  const B();
+}
+
+main() {
+  print(123);
+  A.b;
+}
+''');
+  }
+
+  void test_inBody_expression() {
+    _resolveUnit(r'''
+class A {
+  m() {
+    print(1);
+  }
+}
+''');
+    _updateAndValidate(r'''
+class A {
+  m() {
+    print(2 + 3);
+  }
+}
+''');
+  }
+
+  void test_inBody_insertStatement() {
+    _resolveUnit(r'''
+main() {
+  print(1);
+}
+''');
+    _updateAndValidate(r'''
+main() {
+  print(0);
+  print(1);
+}
+''');
+  }
+
+  void test_inBody_tokenToNode() {
+    _resolveUnit(r'''
+main() {
+  var v = 42;
+  print(v);
+}
+''');
+    _updateAndValidate(r'''
+main() {
+  int v = 42;
+  print(v);
+}
+''');
+  }
+
+  void test_multiple_emptyLine() {
+    _resolveUnit(r'''
+class A {
+  m() {
+    return true;
+  }
+}''');
+    for (int i = 0; i < 6; i++) {
+      if (i.isEven) {
+        _updateAndValidate(
+            r'''
+class A {
+  m() {
+    return true;
+
+  }
+}''',
+            compareWithFull: false);
+      } else {
+        _updateAndValidate(
+            r'''
+class A {
+  m() {
+    return true;
+  }
+}''',
+            compareWithFull: false);
+      }
+    }
+  }
+
+  void test_multiple_expression() {
+    _resolveUnit(r'''
+main() {
+  print(1);
+}''');
+    for (int i = 0; i < 6; i++) {
+      if (i.isEven) {
+        _updateAndValidate(
+            r'''
+main() {
+  print(12);
+}''',
+            compareWithFull: false);
+      } else {
+        _updateAndValidate(
+            r'''
+main() {
+  print(1);
+}''',
+            compareWithFull: false);
+      }
+    }
+  }
+
+  void test_true_emptyLine_betweenClassMembers_insert() {
+    _resolveUnit(r'''
+class A {
+  a() {}
+  b() {}
+}
+''');
+    _updateAndValidate(r'''
+class A {
+  a() {}
+
+  b() {}
+}
+''');
+  }
+
+  void test_true_emptyLine_betweenClassMembers_remove() {
+    _resolveUnit(r'''
+class A {
+  a() {}
+
+  b() {}
+}
+''');
+    _updateAndValidate(r'''
+class A {
+  a() {}
+  b() {}
+}
+''');
+  }
+
+  void test_true_emptyLine_betweenCompilationUnitMembers_insert() {
+    _resolveUnit(r'''
+a() {}
+b() {}
+''');
+    _updateAndValidate(r'''
+a() {}
+
+b() {}
+''');
+  }
+
+  void test_true_emptyLine_betweenCompilationUnitMembers_remove() {
+    _resolveUnit(r'''
+a() {
+  print(1)
+}
+
+b() {
+  foo(42);
+}
+foo(String p) {}
+''');
+    _updateAndValidate(r'''
+a() {
+  print(1)
+}
+b() {
+  foo(42);
+}
+foo(String p) {}
+''');
+  }
+
+  void test_true_wholeConstructor() {
+    _resolveUnit(r'''
+class A {
+  A(int a) {
+    print(a);
+  }
+}
+''');
+    _updateAndValidate(r'''
+class A {
+  A(int b) {
+    print(b);
+  }
+}
+''');
+  }
+
+  void test_true_wholeConstructor_addInitializer() {
+    _resolveUnit(r'''
+class A {
+  int field;
+  A();
+}
+''');
+    _updateAndValidate(r'''
+class A {
+  int field;
+  A() : field = 5;
+}
+''');
+  }
+
+  void test_true_wholeFunction() {
+    _resolveUnit(r'''
+foo() {}
+main(int a) {
+  print(a);
+}
+''');
+    _updateAndValidate(r'''
+foo() {}
+main(int b) {
+  print(b);
+}
+''');
+  }
+
+  void test_true_wholeFunction_firstTokenInUnit() {
+    _resolveUnit(r'''
+main(int a) {
+  print(a);
+}
+''');
+    _updateAndValidate(r'''
+main(int b) {
+  print(b);
+}
+''');
+  }
+
+  void test_true_wholeMethod() {
+    _resolveUnit(r'''
+class A {
+  main(int a) {
+    print(a);
+  }
+}
+''');
+    _updateAndValidate(r'''
+class A {
+  main(int b) {
+    print(b);
+  }
+}
+''');
+  }
+
+  void test_unusedHint_add_wasUsedOnlyInPart() {
+    Source partSource = addNamedSource(
+        '/my_unit.dart',
+        r'''
+part of lib;
+
+f(A a) {
+  a._foo();
+}
+''');
+    _resolveUnit(r'''
+library lib;
+part 'my_unit.dart';
+class A {
+  _foo() {
+    print(1);
+  }
+}
+''');
+    _runTasks();
+    // perform incremental resolution
+    _resetWithIncremental(true);
+    analysisContext2.setContents(
+        partSource,
+        r'''
+part of lib;
+
+f(A a) {
+//  a._foo();
+}
+''');
+    // no hints right now, because we delay hints computing
+    {
+      List<AnalysisError> errors = analysisContext.getErrors(source).errors;
+      expect(errors, isEmpty);
+    }
+    // a new hint should be added
+    List<AnalysisError> errors = analysisContext.computeErrors(source);
+    expect(errors, hasLength(1));
+    expect(errors[0].errorCode.type, ErrorType.HINT);
+    // the same hint should be reported using a ChangeNotice
+    bool noticeFound = false;
+    AnalysisResult result = analysisContext2.performAnalysisTask();
+    for (ChangeNotice notice in result.changeNotices) {
+      if (notice.source == source) {
+        expect(notice.errors, contains(errors[0]));
+        noticeFound = true;
+      }
+    }
+    expect(noticeFound, isTrue);
+  }
+
+  void test_unusedHint_false_stillUsedInPart() {
+    addNamedSource(
+        '/my_unit.dart',
+        r'''
+part of lib;
+
+f(A a) {
+  a._foo();
+}
+''');
+    _resolveUnit(r'''
+library lib;
+part 'my_unit.dart';
+class A {
+  _foo() {
+    print(1);
+  }
+}
+''');
+    // perform incremental resolution
+    _resetWithIncremental(true);
+    analysisContext2.setContents(
+        source,
+        r'''
+library lib;
+part 'my_unit.dart';
+class A {
+  _foo() {
+    print(12);
+  }
+}
+''');
+    // no hints
+    List<AnalysisError> errors = analysisContext.getErrors(source).errors;
+    expect(errors, isEmpty);
+  }
+
+  void test_updateErrors_addNew_hint1() {
+    _resolveUnit(r'''
+int main() {
+  return 42;
+}
+''');
+    _updateAndValidate(r'''
+int main() {
+}
+''');
+  }
+
+  void test_updateErrors_addNew_hint2() {
+    _resolveUnit(r'''
+main() {
+  int v = 0;
+  print(v);
+}
+''');
+    _updateAndValidate(r'''
+main() {
+  int v = 0;
+}
+''');
+  }
+
+  void test_updateErrors_addNew_parse() {
+    _resolveUnit(r'''
+main() {
+  print(42);
+}
+''');
+    _updateAndValidate(r'''
+main() {
+  print(42)
+}
+''');
+  }
+
+  void test_updateErrors_addNew_resolve() {
+    _resolveUnit(r'''
+main() {
+  foo();
+}
+foo() {}
+''');
+    _updateAndValidate(r'''
+main() {
+  bar();
+}
+foo() {}
+''');
+  }
+
+  void test_updateErrors_addNew_resolve2() {
+    _resolveUnit(r'''
+// this comment is important to reproduce the problem
+main() {
+  int vvv = 42;
+  print(vvv);
+}
+''');
+    _updateAndValidate(r'''
+// this comment is important to reproduce the problem
+main() {
+  int vvv = 42;
+  print(vvv2);
+}
+''');
+  }
+
+  void test_updateErrors_addNew_scan() {
+    _resolveUnit(r'''
+main() {
+  1;
+}
+''');
+    _updateAndValidate(r'''
+main() {
+  1e;
+}
+''');
+  }
+
+  void test_updateErrors_addNew_verify() {
+    _resolveUnit(r'''
+main() {
+  foo(0);
+}
+foo(int p) {}
+''');
+    _updateAndValidate(r'''
+main() {
+  foo('abc');
+}
+foo(int p) {}
+''');
+  }
+
+  void test_updateErrors_removeExisting_hint() {
+    _resolveUnit(r'''
+int main() {
+}
+''');
+    _updateAndValidate(r'''
+int main() {
+  return 42;
+}
+''');
+  }
+
+  void test_updateErrors_removeExisting_verify() {
+    _resolveUnit(r'''
+f1() {
+  print(1)
+}
+f2() {
+  print(22)
+}
+f3() {
+  print(333)
+}
+''');
+    _updateAndValidate(r'''
+f1() {
+  print(1)
+}
+f2() {
+  print(22);
+}
+f3() {
+  print(333)
+}
+''');
+  }
+
+  void test_updateErrors_shiftExisting() {
+    _resolveUnit(r'''
+f1() {
+  print(1)
+}
+f2() {
+  print(2);
+}
+f3() {
+  print(333)
+}
+''');
+    _updateAndValidate(r'''
+f1() {
+  print(1)
+}
+f2() {
+  print(22);
+}
+f3() {
+  print(333)
+}
+''');
+  }
+
+  void _assertEqualLineInfo(LineInfo incrLineInfo, LineInfo fullLineInfo) {
+    for (int offset = 0; offset < 1000; offset++) {
+      LineInfo_Location incrLocation = incrLineInfo.getLocation(offset);
+      LineInfo_Location fullLocation = fullLineInfo.getLocation(offset);
+      if (incrLocation.lineNumber != fullLocation.lineNumber ||
+          incrLocation.columnNumber != fullLocation.columnNumber) {
+        fail('At offset $offset ' +
+            '(${incrLocation.lineNumber}, ${incrLocation.columnNumber})' +
+            ' != ' +
+            '(${fullLocation.lineNumber}, ${fullLocation.columnNumber})');
+      }
+    }
+  }
+
+  /**
+   * Reset the analysis context to have the 'incremental' option set to the
+   * given value.
+   */
+  void _resetWithIncremental(bool enable) {
+    AnalysisOptionsImpl analysisOptions = new AnalysisOptionsImpl();
+    analysisOptions.incremental = enable;
+    analysisOptions.incrementalApi = enable;
+//    log.logger = log.PRINT_LOGGER;
+    log.logger = log.NULL_LOGGER;
+    analysisContext2.analysisOptions = analysisOptions;
+  }
+
+  void _resolveUnit(String code) {
+    this.code = code;
+    source = addSource(code);
+    oldLibrary = resolve2(source);
+    oldUnit = resolveCompilationUnit(source, oldLibrary);
+    oldUnitElement = oldUnit.element;
+  }
+
+  void _runTasks() {
+    AnalysisResult result = analysisContext.performAnalysisTask();
+    while (result.changeNotices != null) {
+      result = analysisContext.performAnalysisTask();
+    }
+  }
+
+  void _updateAndValidate(String newCode,
+      {bool expectedSuccess: true, bool compareWithFull: true}) {
+    // Run any pending tasks tasks.
+    _runTasks();
+    // Update the source - currently this may cause incremental resolution.
+    // Then request the updated resolved unit.
+    _resetWithIncremental(true);
+    analysisContext2.setContents(source, newCode);
+    CompilationUnit newUnit = resolveCompilationUnit(source, oldLibrary);
+    List<AnalysisError> newErrors = analysisContext.computeErrors(source);
+    LineInfo newLineInfo = analysisContext.getLineInfo(source);
+    // check for expected failure
+    if (!expectedSuccess) {
+      expect(newUnit.element, isNot(same(oldUnitElement)));
+      return;
+    }
+    // The existing CompilationUnitElement should be updated.
+    expect(newUnit.element, same(oldUnitElement));
+    // The only expected pending task should return the same resolved
+    // "newUnit", so all clients will get it using the usual way.
+    AnalysisResult analysisResult = analysisContext.performAnalysisTask();
+    ChangeNotice notice = analysisResult.changeNotices[0];
+    expect(notice.resolvedDartUnit, same(newUnit));
+    // Resolve "newCode" from scratch.
+    if (compareWithFull) {
+      _resetWithIncremental(false);
+      source = addSource(newCode + ' ');
+      source = addSource(newCode);
+      _runTasks();
+      LibraryElement library = resolve2(source);
+      CompilationUnit fullNewUnit = resolveCompilationUnit(source, library);
+      // Validate tokens.
+      _assertEqualTokens(newUnit, fullNewUnit);
+      // Validate LineInfo
+      _assertEqualLineInfo(newLineInfo, analysisContext.getLineInfo(source));
+      // Validate that "incremental" and "full" units have the same resolution.
+      try {
+        assertSameResolution(newUnit, fullNewUnit, validateTypes: true);
+      } on IncrementalResolutionMismatch catch (mismatch) {
+        fail(mismatch.message);
+      }
+      List<AnalysisError> newFullErrors =
+          analysisContext.getErrors(source).errors;
+      _assertEqualErrors(newErrors, newFullErrors);
+    }
+  }
+
+  static void _assertEqualToken(Token incrToken, Token fullToken) {
+//    print('[${incrToken.offset}] |$incrToken| vs. [${fullToken.offset}] |$fullToken|');
+    expect(incrToken.type, fullToken.type);
+    expect(incrToken.offset, fullToken.offset);
+    expect(incrToken.length, fullToken.length);
+    expect(incrToken.lexeme, fullToken.lexeme);
+  }
+
+  static void _assertEqualTokens(
+      CompilationUnit incrUnit, CompilationUnit fullUnit) {
+    Token incrToken = incrUnit.beginToken;
+    Token fullToken = fullUnit.beginToken;
+    while (incrToken.type != TokenType.EOF && fullToken.type != TokenType.EOF) {
+      _assertEqualToken(incrToken, fullToken);
+      // comments
+      {
+        Token incrComment = incrToken.precedingComments;
+        Token fullComment = fullToken.precedingComments;
+        while (true) {
+          if (fullComment == null) {
+            expect(incrComment, isNull);
+            break;
+          }
+          expect(incrComment, isNotNull);
+          _assertEqualToken(incrComment, fullComment);
+          incrComment = incrComment.next;
+          fullComment = fullComment.next;
+        }
+      }
+      // next tokens
+      incrToken = incrToken.next;
+      fullToken = fullToken.next;
+    }
+  }
+}
+
+@reflectiveTest
+class ResolutionContextBuilderTest extends EngineTestCase {
+  GatheringErrorListener listener = new GatheringErrorListener();
+
+  void test_scopeFor_ClassDeclaration() {
+    Scope scope = _scopeFor(_createResolvedClassDeclaration());
+    EngineTestCase.assertInstanceOf(
+        (obj) => obj is LibraryScope, LibraryScope, scope);
+  }
+
+  void test_scopeFor_ClassTypeAlias() {
+    Scope scope = _scopeFor(_createResolvedClassTypeAlias());
+    EngineTestCase.assertInstanceOf(
+        (obj) => obj is LibraryScope, LibraryScope, scope);
+  }
+
+  void test_scopeFor_CompilationUnit() {
+    Scope scope = _scopeFor(_createResolvedCompilationUnit());
+    EngineTestCase.assertInstanceOf(
+        (obj) => obj is LibraryScope, LibraryScope, scope);
+  }
+
+  void test_scopeFor_ConstructorDeclaration() {
+    Scope scope = _scopeFor(_createResolvedConstructorDeclaration());
+    EngineTestCase.assertInstanceOf(
+        (obj) => obj is ClassScope, ClassScope, scope);
+  }
+
+  void test_scopeFor_ConstructorDeclaration_parameters() {
+    Scope scope = _scopeFor(_createResolvedConstructorDeclaration().parameters);
+    EngineTestCase.assertInstanceOf(
+        (obj) => obj is FunctionScope, FunctionScope, scope);
+  }
+
+  void test_scopeFor_FunctionDeclaration() {
+    Scope scope = _scopeFor(_createResolvedFunctionDeclaration());
+    EngineTestCase.assertInstanceOf(
+        (obj) => obj is LibraryScope, LibraryScope, scope);
+  }
+
+  void test_scopeFor_FunctionDeclaration_parameters() {
+    Scope scope = _scopeFor(
+        _createResolvedFunctionDeclaration().functionExpression.parameters);
+    EngineTestCase.assertInstanceOf(
+        (obj) => obj is FunctionScope, FunctionScope, scope);
+  }
+
+  void test_scopeFor_FunctionTypeAlias() {
+    Scope scope = _scopeFor(_createResolvedFunctionTypeAlias());
+    EngineTestCase.assertInstanceOf(
+        (obj) => obj is LibraryScope, LibraryScope, scope);
+  }
+
+  void test_scopeFor_FunctionTypeAlias_parameters() {
+    Scope scope = _scopeFor(_createResolvedFunctionTypeAlias().parameters);
+    EngineTestCase.assertInstanceOf(
+        (obj) => obj is FunctionTypeScope, FunctionTypeScope, scope);
+  }
+
+  void test_scopeFor_MethodDeclaration() {
+    Scope scope = _scopeFor(_createResolvedMethodDeclaration());
+    EngineTestCase.assertInstanceOf(
+        (obj) => obj is ClassScope, ClassScope, scope);
+  }
+
+  void test_scopeFor_MethodDeclaration_body() {
+    Scope scope = _scopeFor(_createResolvedMethodDeclaration().body);
+    EngineTestCase.assertInstanceOf(
+        (obj) => obj is FunctionScope, FunctionScope, scope);
+  }
+
+  void test_scopeFor_notInCompilationUnit() {
+    try {
+      _scopeFor(AstFactory.identifier3("x"));
+      fail("Expected AnalysisException");
+    } on AnalysisException {
+      // Expected
+    }
+  }
+
+  void test_scopeFor_null() {
+    try {
+      _scopeFor(null);
+      fail("Expected AnalysisException");
+    } on AnalysisException {
+      // Expected
+    }
+  }
+
+  void test_scopeFor_unresolved() {
+    try {
+      _scopeFor(AstFactory.compilationUnit());
+      fail("Expected AnalysisException");
+    } on AnalysisException {
+      // Expected
+    }
+  }
+
+  ClassDeclaration _createResolvedClassDeclaration() {
+    CompilationUnit unit = _createResolvedCompilationUnit();
+    String className = "C";
+    ClassDeclaration classNode = AstFactory.classDeclaration(
+        null, className, AstFactory.typeParameterList(), null, null, null);
+    unit.declarations.add(classNode);
+    ClassElement classElement = ElementFactory.classElement2(className);
+    classNode.name.staticElement = classElement;
+    (unit.element as CompilationUnitElementImpl).types = <ClassElement>[
+      classElement
+    ];
+    return classNode;
+  }
+
+  ClassTypeAlias _createResolvedClassTypeAlias() {
+    CompilationUnit unit = _createResolvedCompilationUnit();
+    String className = "C";
+    ClassTypeAlias classNode = AstFactory.classTypeAlias(
+        className, AstFactory.typeParameterList(), null, null, null, null);
+    unit.declarations.add(classNode);
+    ClassElement classElement = ElementFactory.classElement2(className);
+    classNode.name.staticElement = classElement;
+    (unit.element as CompilationUnitElementImpl).types = <ClassElement>[
+      classElement
+    ];
+    return classNode;
+  }
+
+  CompilationUnit _createResolvedCompilationUnit() {
+    CompilationUnit unit = AstFactory.compilationUnit();
+    LibraryElementImpl library =
+        ElementFactory.library(AnalysisContextFactory.contextWithCore(), "lib");
+    unit.element = library.definingCompilationUnit;
+    return unit;
+  }
+
+  ConstructorDeclaration _createResolvedConstructorDeclaration() {
+    ClassDeclaration classNode = _createResolvedClassDeclaration();
+    String constructorName = "f";
+    ConstructorDeclaration constructorNode = AstFactory.constructorDeclaration(
+        AstFactory.identifier3(constructorName),
+        null,
+        AstFactory.formalParameterList(),
+        null);
+    classNode.members.add(constructorNode);
+    ConstructorElement constructorElement =
+        ElementFactory.constructorElement2(classNode.element, null);
+    constructorNode.element = constructorElement;
+    (classNode.element as ClassElementImpl).constructors = <ConstructorElement>[
+      constructorElement
+    ];
+    return constructorNode;
+  }
+
+  FunctionDeclaration _createResolvedFunctionDeclaration() {
+    CompilationUnit unit = _createResolvedCompilationUnit();
+    String functionName = "f";
+    FunctionDeclaration functionNode = AstFactory.functionDeclaration(
+        null, null, functionName, AstFactory.functionExpression());
+    unit.declarations.add(functionNode);
+    FunctionElement functionElement =
+        ElementFactory.functionElement(functionName);
+    functionNode.name.staticElement = functionElement;
+    (unit.element as CompilationUnitElementImpl).functions = <FunctionElement>[
+      functionElement
+    ];
+    return functionNode;
+  }
+
+  FunctionTypeAlias _createResolvedFunctionTypeAlias() {
+    CompilationUnit unit = _createResolvedCompilationUnit();
+    FunctionTypeAlias aliasNode = AstFactory.typeAlias(
+        AstFactory.typeName4("A"),
+        "F",
+        AstFactory.typeParameterList(),
+        AstFactory.formalParameterList());
+    unit.declarations.add(aliasNode);
+    SimpleIdentifier aliasName = aliasNode.name;
+    FunctionTypeAliasElement aliasElement =
+        new FunctionTypeAliasElementImpl.forNode(aliasName);
+    aliasName.staticElement = aliasElement;
+    (unit.element as CompilationUnitElementImpl).typeAliases =
+        <FunctionTypeAliasElement>[aliasElement];
+    return aliasNode;
+  }
+
+  MethodDeclaration _createResolvedMethodDeclaration() {
+    ClassDeclaration classNode = _createResolvedClassDeclaration();
+    String methodName = "f";
+    MethodDeclaration methodNode = AstFactory.methodDeclaration(
+        null,
+        null,
+        null,
+        null,
+        AstFactory.identifier3(methodName),
+        AstFactory.formalParameterList());
+    classNode.members.add(methodNode);
+    MethodElement methodElement =
+        ElementFactory.methodElement(methodName, null);
+    methodNode.name.staticElement = methodElement;
+    (classNode.element as ClassElementImpl).methods = <MethodElement>[
+      methodElement
+    ];
+    return methodNode;
+  }
+
+  Scope _scopeFor(AstNode node) {
+    return ResolutionContextBuilder.contextFor(node, listener).scope;
+  }
+}
+
+class _Edit {
+  final int offset;
+  final int length;
+  final String replacement;
+  _Edit(this.offset, this.length, this.replacement);
+}