Make subclasses of AbstractContextTest asynchronous.

pkg/analysis_server/test/src/utilities/change_builder_dart_test.dart

 // Copyright (c) 2015, 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 analysis_server.test.src.utilities.change_builder_dart_test;
 
 import 'package:analysis_server/plugin/protocol/protocol.dart';
 import 'package:analysis_server/src/provisional/edit/utilities/change_builder_core.dart';
 import 'package:analysis_server/src/provisional/edit/utilities/change_builder_dart.dart';
 import 'package:analysis_server/src/utilities/change_builder_dart.dart';
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/standard_resolution_map.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import '../../abstract_context.dart';
 
 main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(DartChangeBuilderImplTest);
     defineReflectiveTests(DartEditBuilderImplTest);
     defineReflectiveTests(DartFileEditBuilderImplTest);
   });
 }
 
 @reflectiveTest
 class DartChangeBuilderImplTest extends AbstractContextTest {
-  void test_createFileEditBuilder() {
+  test_createFileEditBuilder() async {
     Source source = addSource('/test.dart', 'library test;');
-    resolveLibraryUnit(source);
+    await resolveLibraryUnit(source);
     int timeStamp = 54;
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     DartFileEditBuilderImpl fileEditBuilder =
         builder.createFileEditBuilder(source, timeStamp);
     expect(fileEditBuilder, new isInstanceOf<DartFileEditBuilder>());
     SourceFileEdit fileEdit = fileEditBuilder.fileEdit;
     expect(fileEdit.file, source.fullName);
     expect(fileEdit.fileStamp, timeStamp);
   }
 }
 
 @reflectiveTest
 class DartEditBuilderImplTest extends AbstractContextTest {
   SourceEdit getEdit(DartChangeBuilderImpl builder) {
     SourceChange sourceChange = builder.sourceChange;
     expect(sourceChange, isNotNull);
     List<SourceFileEdit> fileEdits = sourceChange.edits;
     expect(fileEdits, hasLength(1));
     SourceFileEdit fileEdit = fileEdits[0];
     expect(fileEdit, isNotNull);
     List<SourceEdit> edits = fileEdit.edits;
     expect(edits, hasLength(1));
     return edits[0];
   }
 
-  void test_writeClassDeclaration_interfaces() {
+  test_writeClassDeclaration_interfaces() async {
     Source source = addSource('/test.dart', 'class A {}');
-    CompilationUnit unit = resolveLibraryUnit(source);
+    CompilationUnit unit = await resolveLibraryUnit(source);
     ClassDeclaration declaration = unit.declarations[0];
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(0, (EditBuilder builder) {
         (builder as DartEditBuilder).writeClassDeclaration('C', interfaces: [
           resolutionMap.elementDeclaredByClassDeclaration(declaration).type
         ]);
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(
         edit.replacement, equalsIgnoringWhitespace('class C implements A { }'));
   }
 
-  void test_writeClassDeclaration_isAbstract() {
+  test_writeClassDeclaration_isAbstract() async {
     Source source = addSource('/test.dart', '');
-    resolveLibraryUnit(source);
+    await resolveLibraryUnit(source);
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(0, (EditBuilder builder) {
         (builder as DartEditBuilder)
             .writeClassDeclaration('C', isAbstract: true);
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('abstract class C { }'));
   }
 
-  void test_writeClassDeclaration_memberWriter() {
+  test_writeClassDeclaration_memberWriter() async {
     Source source = addSource('/test.dart', '');
-    resolveLibraryUnit(source);
+    await resolveLibraryUnit(source);
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(0, (EditBuilder builder) {
         (builder as DartEditBuilder).writeClassDeclaration('C',
             memberWriter: () {
           builder.write('/**/');
         });
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('class C { /**/ }'));
   }
 
-  void test_writeClassDeclaration_mixins_noSuperclass() {
+  test_writeClassDeclaration_mixins_noSuperclass() async {
     Source source = addSource('/test.dart', 'class A {}');
-    CompilationUnit unit = resolveLibraryUnit(source);
+    CompilationUnit unit = await resolveLibraryUnit(source);
     ClassDeclaration classA = unit.declarations[0];
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(0, (EditBuilder builder) {
         (builder as DartEditBuilder).writeClassDeclaration('C', mixins: [
           resolutionMap.elementDeclaredByClassDeclaration(classA).type
         ]);
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement,
         equalsIgnoringWhitespace('class C extends Object with A { }'));
   }
 
-  void test_writeClassDeclaration_mixins_superclass() {
+  test_writeClassDeclaration_mixins_superclass() async {
     Source source = addSource('/test.dart', 'class A {} class B {}');
-    CompilationUnit unit = resolveLibraryUnit(source);
+    CompilationUnit unit = await resolveLibraryUnit(source);
     ClassDeclaration classA = unit.declarations[0];
     ClassDeclaration classB = unit.declarations[1];
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(0, (EditBuilder builder) {
         (builder as DartEditBuilder).writeClassDeclaration('C',
             mixins: [
               resolutionMap.elementDeclaredByClassDeclaration(classB).type
             ],
             superclass:
                 resolutionMap.elementDeclaredByClassDeclaration(classA).type);
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement,
         equalsIgnoringWhitespace('class C extends A with B { }'));
   }
 
-  void test_writeClassDeclaration_nameGroupName() {
+  test_writeClassDeclaration_nameGroupName() async {
     Source source = addSource('/test.dart', '');
-    resolveLibraryUnit(source);
+    await resolveLibraryUnit(source);
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(0, (EditBuilder builder) {
         (builder as DartEditBuilder)
             .writeClassDeclaration('C', nameGroupName: 'name');
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('class C { }'));
 
     List<LinkedEditGroup> linkedEditGroups =
         builder.sourceChange.linkedEditGroups;
     expect(linkedEditGroups, hasLength(1));
     LinkedEditGroup group = linkedEditGroups[0];
     expect(group.length, 1);
     expect(group.positions, hasLength(1));
   }
 
-  void test_writeClassDeclaration_superclass() {
+  test_writeClassDeclaration_superclass() async {
     Source source = addSource('/test.dart', 'class B {}');
-    CompilationUnit unit = resolveLibraryUnit(source);
+    CompilationUnit unit = await resolveLibraryUnit(source);
     ClassDeclaration declaration = unit.declarations[0];
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(0, (EditBuilder builder) {
         (builder as DartEditBuilder).writeClassDeclaration('C',
             superclass: resolutionMap
                 .elementDeclaredByClassDeclaration(declaration)
                 .type);
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('class C extends B { }'));
   }
 
-  void test_writeFieldDeclaration_initializerWriter() {
+  test_writeFieldDeclaration_initializerWriter() async {
     String content = 'class A {}';
     Source source = addSource('/test.dart', content);
-    resolveLibraryUnit(source);
+    await resolveLibraryUnit(source);
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilder).writeFieldDeclaration('f',
             initializerWriter: () {
           builder.write('e');
         });
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('var f = e;'));
   }
 
-  void test_writeFieldDeclaration_isConst() {
+  test_writeFieldDeclaration_isConst() async {
     String content = 'class A {}';
     Source source = addSource('/test.dart', content);
-    resolveLibraryUnit(source);
+    await resolveLibraryUnit(source);
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilder).writeFieldDeclaration('f', isConst: true);
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('const f;'));
   }
 
-  void test_writeFieldDeclaration_isConst_isFinal() {
+  test_writeFieldDeclaration_isConst_isFinal() async {
     String content = 'class A {}';
     Source source = addSource('/test.dart', content);
-    resolveLibraryUnit(source);
+    await resolveLibraryUnit(source);
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilder)
             .writeFieldDeclaration('f', isConst: true, isFinal: true);
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('const f;'));
   }
 
-  void test_writeFieldDeclaration_isFinal() {
+  test_writeFieldDeclaration_isFinal() async {
     String content = 'class A {}';
     Source source = addSource('/test.dart', content);
-    resolveLibraryUnit(source);
+    await resolveLibraryUnit(source);
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilder).writeFieldDeclaration('f', isFinal: true);
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('final f;'));
   }
 
-  void test_writeFieldDeclaration_isStatic() {
+  test_writeFieldDeclaration_isStatic() async {
     String content = 'class A {}';
     Source source = addSource('/test.dart', content);
-    resolveLibraryUnit(source);
+    await resolveLibraryUnit(source);
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilder).writeFieldDeclaration('f', isStatic: true);
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('static var f;'));
   }
 
-  void test_writeFieldDeclaration_nameGroupName() {
+  test_writeFieldDeclaration_nameGroupName() async {
     String content = 'class A {}';
     Source source = addSource('/test.dart', content);
-    resolveLibraryUnit(source);
+    await resolveLibraryUnit(source);
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilder)
             .writeFieldDeclaration('f', nameGroupName: 'name');
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('var f;'));
 
     List<LinkedEditGroup> linkedEditGroups =
         builder.sourceChange.linkedEditGroups;
     expect(linkedEditGroups, hasLength(1));
     LinkedEditGroup group = linkedEditGroups[0];
     expect(group.length, 1);
     expect(group.positions, hasLength(1));
     Position position = group.positions[0];
     expect(position.offset, equals(13));
   }
 
-  void test_writeFieldDeclaration_type_typeGroupName() {
+  test_writeFieldDeclaration_type_typeGroupName() async {
     String content = 'class A {} class B {}';
     Source source = addSource('/test.dart', content);
-    CompilationUnit unit = resolveLibraryUnit(source);
+    CompilationUnit unit = await resolveLibraryUnit(source);
     ClassDeclaration declaration = unit.declarations[0];
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilder).writeFieldDeclaration('f',
             type: resolutionMap
                 .elementDeclaredByClassDeclaration(declaration)
                 .type,
             typeGroupName: 'type');
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('A f;'));
 
     List<LinkedEditGroup> linkedEditGroups =
         builder.sourceChange.linkedEditGroups;
     expect(linkedEditGroups, hasLength(1));
     LinkedEditGroup group = linkedEditGroups[0];
     expect(group.length, 1);
     expect(group.positions, hasLength(1));
     Position position = group.positions[0];
     expect(position.offset, equals(20));
   }
 
-  void test_writeGetterDeclaration_bodyWriter() {
+  test_writeGetterDeclaration_bodyWriter() async {
     String content = 'class A {}';
     Source source = addSource('/test.dart', content);
-    resolveLibraryUnit(source);
+    await resolveLibraryUnit(source);
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilder).writeGetterDeclaration('g',
             bodyWriter: () {
           builder.write('{}');
         });
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('get g {}'));
   }
 
-  void test_writeGetterDeclaration_isStatic() {
+  test_writeGetterDeclaration_isStatic() async {
     String content = 'class A {}';
     Source source = addSource('/test.dart', content);
-    resolveLibraryUnit(source);
+    await resolveLibraryUnit(source);
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilder)
             .writeGetterDeclaration('g', isStatic: true);
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('static get g => null;'));
   }
 
-  void test_writeGetterDeclaration_nameGroupName() {
+  test_writeGetterDeclaration_nameGroupName() async {
     String content = 'class A {}';
     Source source = addSource('/test.dart', content);
-    resolveLibraryUnit(source);
+    await resolveLibraryUnit(source);
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilder)
             .writeGetterDeclaration('g', nameGroupName: 'name');
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('get g => null;'));
 
     List<LinkedEditGroup> linkedEditGroups =
         builder.sourceChange.linkedEditGroups;
     expect(linkedEditGroups, hasLength(1));
     LinkedEditGroup group = linkedEditGroups[0];
     expect(group.length, 1);
     expect(group.positions, hasLength(1));
     Position position = group.positions[0];
     expect(position.offset, equals(13));
   }
 
-  void test_writeGetterDeclaration_returnType() {
+  test_writeGetterDeclaration_returnType() async {
     String content = 'class A {} class B {}';
     Source source = addSource('/test.dart', content);
-    CompilationUnit unit = resolveLibraryUnit(source);
+    CompilationUnit unit = await resolveLibraryUnit(source);
     ClassDeclaration classA = unit.declarations[0];
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilder).writeGetterDeclaration('g',
             returnType:
                 resolutionMap.elementDeclaredByClassDeclaration(classA).type,
             returnTypeGroupName: 'returnType');
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('A get g => null;'));
 
     List<LinkedEditGroup> linkedEditGroups =
         builder.sourceChange.linkedEditGroups;
     expect(linkedEditGroups, hasLength(1));
     LinkedEditGroup group = linkedEditGroups[0];
     expect(group.length, 1);
     expect(group.positions, hasLength(1));
     Position position = group.positions[0];
     expect(position.offset, equals(20));
   }
 
-  void test_writeOverrideOfInheritedMember() {
+  test_writeOverrideOfInheritedMember() async {
     String content = '''
 class A {
   A add(A a) => null;
 }
 class B extends A {
 }''';
     Source source = addSource('/test.dart', content);
-    CompilationUnit unit = resolveLibraryUnit(source);
+    CompilationUnit unit = await resolveLibraryUnit(source);
     ClassDeclaration declaration = unit.declarations[0];
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilder).writeOverrideOfInheritedMember(
             resolutionMap
                 .elementDeclaredByClassDeclaration(declaration)
                 .methods[0]);
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('''
 @override
 A add(A a) {
   // TODO: implement add
   return null;
 }'''));
   }
 
-  void test_writeParameters_named() {
+  test_writeParameters_named() async {
     String content = 'f(int i, {String s}) {}';
     Source source = addSource('/test.dart', content);
-    CompilationUnit unit = resolveLibraryUnit(source);
+    CompilationUnit unit = await resolveLibraryUnit(source);
     FunctionDeclaration f = unit.declarations[0];
     FormalParameterList parameters = f.functionExpression.parameters;
     Iterable<ParameterElement> elements = parameters.parameters
         .map(resolutionMap.elementDeclaredByFormalParameter);
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilder).writeParameters(elements);
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('(int i, {String s})'));
   }
 
-  void test_writeParameters_positional() {
+  test_writeParameters_positional() async {
     String content = 'f(int i, [String s]) {}';
     Source source = addSource('/test.dart', content);
-    CompilationUnit unit = resolveLibraryUnit(source);
+    CompilationUnit unit = await resolveLibraryUnit(source);
     FunctionDeclaration f = unit.declarations[0];
     FormalParameterList parameters = f.functionExpression.parameters;
     Iterable<ParameterElement> elements = parameters.parameters
         .map(resolutionMap.elementDeclaredByFormalParameter);
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilder).writeParameters(elements);
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('(int i, [String s])'));
   }
 
-  void test_writeParameters_required() {
+  test_writeParameters_required() async {
     String content = 'f(int i, String s) {}';
     Source source = addSource('/test.dart', content);
-    CompilationUnit unit = resolveLibraryUnit(source);
+    CompilationUnit unit = await resolveLibraryUnit(source);
     FunctionDeclaration f = unit.declarations[0];
     FormalParameterList parameters = f.functionExpression.parameters;
     Iterable<ParameterElement> elements = parameters.parameters
         .map(resolutionMap.elementDeclaredByFormalParameter);
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilder).writeParameters(elements);
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('(int i, String s)'));
   }
 
-  void test_writeParametersMatchingArguments_named() {
+  test_writeParametersMatchingArguments_named() async {
     String content = '''
 f(int i, String s) {
   g(s, index: i);
 }''';
     Source source = addSource('/test.dart', content);
-    CompilationUnit unit = resolveLibraryUnit(source);
+    CompilationUnit unit = await resolveLibraryUnit(source);
     FunctionDeclaration f = unit.declarations[0];
     BlockFunctionBody body = f.functionExpression.body;
     ExpressionStatement statement = body.block.statements[0];
     MethodInvocation invocation = statement.expression;
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilder)
             .writeParametersMatchingArguments(invocation.argumentList);
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(
         edit.replacement, equalsIgnoringWhitespace('(String s, [int index])'));
   }
 
-  void test_writeParametersMatchingArguments_required() {
+  test_writeParametersMatchingArguments_required() async {
     String content = '''
 f(int i, String s) {
   g(s, i);
 }''';
     Source source = addSource('/test.dart', content);
-    CompilationUnit unit = resolveLibraryUnit(source);
+    CompilationUnit unit = await resolveLibraryUnit(source);
     FunctionDeclaration f = unit.declarations[0];
     BlockFunctionBody body = f.functionExpression.body;
     ExpressionStatement statement = body.block.statements[0];
     MethodInvocation invocation = statement.expression;
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilder)
             .writeParametersMatchingArguments(invocation.argumentList);
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('(String s, int i)'));
   }
 
-  void test_writeParameterSource() {
+  test_writeParameterSource() async {
     String content = 'class A {}';
     Source source = addSource('/test.dart', content);
-    CompilationUnit unit = resolveLibraryUnit(source);
+    CompilationUnit unit = await resolveLibraryUnit(source);
     ClassDeclaration classA = unit.declarations[0];
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilder).writeParameterSource(
             resolutionMap.elementDeclaredByClassDeclaration(classA).type, 'a');
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('A a'));
   }
 
-  void test_writeType_dymanic() {
+  test_writeType_dynamic() async {
     String content = 'class A {}';
     Source source = addSource('/test.dart', content);
-    CompilationUnit unit = resolveLibraryUnit(source);
+    CompilationUnit unit = await resolveLibraryUnit(source);
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilder).writeType(resolutionMap
             .elementDeclaredByCompilationUnit(unit)
             .context
             .typeProvider
             .dynamicType);
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace(''));
   }
 
-  void test_writeType_genericType() {
+  test_writeType_genericType() async {
     String content = 'class A {} class B<E> {}';
     Source source = addSource('/test.dart', content);
-    CompilationUnit unit = resolveLibraryUnit(source);
+    CompilationUnit unit = await resolveLibraryUnit(source);
     ClassDeclaration classA = unit.declarations[0];
     ClassDeclaration classB = unit.declarations[1];
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilder).writeType(resolutionMap
             .elementDeclaredByClassDeclaration(classB)
             .type
             .instantiate([
           resolutionMap.elementDeclaredByClassDeclaration(classA).type
         ]));
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('B<A>'));
   }
 
-  void test_writeType_groupName() {
+  test_writeType_groupName() async {
     String content = 'class A {} class B extends A {} class C extends B {}';
     Source source = addSource('/test.dart', content);
-    CompilationUnit unit = resolveLibraryUnit(source);
+    CompilationUnit unit = await resolveLibraryUnit(source);
     ClassDeclaration classC = unit.declarations[2];
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilder).writeType(
             resolutionMap.elementDeclaredByClassDeclaration(classC).type,
             groupName: 'type');
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('C'));
 
     List<LinkedEditGroup> linkedEditGroups =
         builder.sourceChange.linkedEditGroups;
     expect(linkedEditGroups, hasLength(1));
     LinkedEditGroup group = linkedEditGroups[0];
     expect(group, isNotNull);
   }
 
-  void test_writeType_groupName_addSupertypeProposals() {
+  test_writeType_groupName_addSupertypeProposals() async {
     String content = 'class A {} class B extends A {} class C extends B {}';
     Source source = addSource('/test.dart', content);
-    CompilationUnit unit = resolveLibraryUnit(source);
+    CompilationUnit unit = await resolveLibraryUnit(source);
     ClassDeclaration classC = unit.declarations[2];
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilder).writeType(
             resolutionMap.elementDeclaredByClassDeclaration(classC).type,
             addSupertypeProposals: true,
             groupName: 'type');
       });
@@ skipping 11 matching lines @@
         suggestions.map((LinkedEditSuggestion suggestion) {
       expect(suggestion.kind, LinkedEditSuggestionKind.TYPE);
       return suggestion.value;
     });
     expect(values, contains('Object'));
     expect(values, contains('A'));
     expect(values, contains('B'));
     expect(values, contains('C'));
   }
 
-  void test_writeType_null() {
+  test_writeType_null() async {
     String content = 'class A {}';
     Source source = addSource('/test.dart', content);
-    resolveLibraryUnit(source);
+    await resolveLibraryUnit(source);
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilder).writeType(null);
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace(''));
   }
 
-  void test_writeType_required_dymanic() {
+  test_writeType_required_dynamic() async {
     String content = 'class A {}';
     Source source = addSource('/test.dart', content);
-    CompilationUnit unit = resolveLibraryUnit(source);
+    CompilationUnit unit = await resolveLibraryUnit(source);
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilder).writeType(
             resolutionMap
                 .elementDeclaredByCompilationUnit(unit)
                 .context
                 .typeProvider
                 .dynamicType,
             required: true);
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('var'));
   }
 
-  void test_writeType_required_notNull() {
+  test_writeType_required_notNull() async {
     String content = 'class A {}';
     Source source = addSource('/test.dart', content);
-    CompilationUnit unit = resolveLibraryUnit(source);
+    CompilationUnit unit = await resolveLibraryUnit(source);
     ClassDeclaration classA = unit.declarations[0];
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilder).writeType(
             resolutionMap.elementDeclaredByClassDeclaration(classA).type,
             required: true);
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('A'));
   }
 
-  void test_writeType_required_null() {
+  test_writeType_required_null() async {
     String content = 'class A {}';
     Source source = addSource('/test.dart', content);
-    resolveLibraryUnit(source);
+    await resolveLibraryUnit(source);
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilder).writeType(null, required: true);
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('var'));
   }
 
-  void test_writeType_simpleType() {
+  test_writeType_simpleType() async {
     String content = 'class A {}';
     Source source = addSource('/test.dart', content);
-    CompilationUnit unit = resolveLibraryUnit(source);
+    CompilationUnit unit = await resolveLibraryUnit(source);
     ClassDeclaration classA = unit.declarations[0];
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilder).writeType(
             resolutionMap.elementDeclaredByClassDeclaration(classA).type);
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('A'));
   }
 
-  void test_writeTypes_empty() {
+  test_writeTypes_empty() async {
     String content = 'class A {}';
     Source source = addSource('/test.dart', content);
-    resolveLibraryUnit(source);
+    await resolveLibraryUnit(source);
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilderImpl).writeTypes([]);
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, isEmpty);
   }
 
-  void test_writeTypes_noPrefix() {
+  test_writeTypes_noPrefix() async {
     String content = 'class A {} class B {}';
     Source source = addSource('/test.dart', content);
-    CompilationUnit unit = resolveLibraryUnit(source);
+    CompilationUnit unit = await resolveLibraryUnit(source);
     ClassDeclaration classA = unit.declarations[0];
     ClassDeclaration classB = unit.declarations[1];
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilderImpl).writeTypes([
           resolutionMap.elementDeclaredByClassDeclaration(classA).type,
           resolutionMap.elementDeclaredByClassDeclaration(classB).type
         ]);
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('A, B'));
   }
 
-  void test_writeTypes_null() {
+  test_writeTypes_null() async {
     String content = 'class A {}';
     Source source = addSource('/test.dart', content);
-    resolveLibraryUnit(source);
+    await resolveLibraryUnit(source);
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilderImpl).writeTypes(null);
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, isEmpty);
   }
 
-  void test_writeTypes_prefix() {
+  test_writeTypes_prefix() async {
     String content = 'class A {} class B {}';
     Source source = addSource('/test.dart', content);
-    CompilationUnit unit = resolveLibraryUnit(source);
+    CompilationUnit unit = await resolveLibraryUnit(source);
     ClassDeclaration classA = unit.declarations[0];
     ClassDeclaration classB = unit.declarations[1];
 
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, 1, (FileEditBuilder builder) {
       builder.addInsertion(content.length - 1, (EditBuilder builder) {
         (builder as DartEditBuilderImpl).writeTypes([
           resolutionMap.elementDeclaredByClassDeclaration(classA).type,
           resolutionMap.elementDeclaredByClassDeclaration(classB).type
         ], prefix: 'implements ');
       });
     });
     SourceEdit edit = getEdit(builder);
     expect(edit.replacement, equalsIgnoringWhitespace('implements A, B'));
   }
 }
 
 @reflectiveTest
 class DartFileEditBuilderImplTest extends AbstractContextTest {
-  void test_createEditBuilder() {
+  test_createEditBuilder() async {
     Source source = addSource('/test.dart', 'library test;');
-    resolveLibraryUnit(source);
+    await resolveLibraryUnit(source);
     int timeStamp = 65;
     DartChangeBuilderImpl builder = new DartChangeBuilderImpl(context);
     builder.addFileEdit(source, timeStamp, (FileEditBuilder builder) {
       int offset = 4;
       int length = 5;
       DartEditBuilderImpl editBuilder = (builder as DartFileEditBuilderImpl)
           .createEditBuilder(offset, length);
       expect(editBuilder, new isInstanceOf<DartEditBuilder>());
       SourceEdit sourceEdit = editBuilder.sourceEdit;
       expect(sourceEdit.length, length);
       expect(sourceEdit.offset, offset);
       expect(sourceEdit.replacement, isEmpty);
     });
   }
 }