// Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'package:analyzer/src/test_utilities/package_config_file_builder.dart';
import 'package:analyzer_plugin/protocol/protocol_common.dart';
import 'package:analyzer_plugin/utilities/completion/completion_core.dart';
import 'package:analyzer_plugin/utilities/completion/relevance.dart';
import 'package:analyzer_plugin/utilities/completion/type_member_contributor.dart';
import 'package:test/test.dart';
import 'package:test_reflective_loader/test_reflective_loader.dart';

import 'completion_contributor_util.dart';

void main() {
  defineReflectiveSuite(() {
    defineReflectiveTests(TypeMemberContributorTest);
  });
}

@reflectiveTest
class TypeMemberContributorTest extends DartCompletionContributorTest {
  /// Check whether a declaration of the form [shadower] in a derived class
  /// shadows a declaration of the form [shadowee] in a base class, for the
  /// purposes of what is shown during completion. [shouldBeShadowed] indicates
  /// whether shadowing is expected.
  Future<void> check_shadowing(
      String shadower, String shadowee, bool shouldBeShadowed) async {
    addTestSource('''
class Base {
  $shadowee
}
class Derived extends Base {
  $shadower
}
void f(Derived d) {
  d.^
}
''');
    await computeSuggestions();
    var suggestionsForX = suggestions
        ?.where((CompletionSuggestion s) => s.completion == 'x')
        .toList();
    expect(suggestionsForX, hasLength(1));
    if (shouldBeShadowed) {
      expect(suggestionsForX![0].declaringType, 'Derived');
    } else {
      expect(suggestionsForX![0].declaringType, 'Base');
    }
  }

  @override
  CompletionContributor createContributor() {
    return TypeMemberContributor();
  }

  @override
  void setUp() {
    super.setUp();
    writeTestPackageConfig(
      config: PackageConfigFileBuilder()
        ..add(name: 'myBar', rootPath: '$workspaceRootPath/myBar'),
      meta: true,
    );
  }

  Future<void> test_ArgDefaults_method() async {
    addTestSource('''
class A {
  bool a(int b, bool c) => false;
}

void main() {new A().a^}''');
    await computeSuggestions();

    assertSuggestMethod('a', 'A', 'bool', defaultArgListString: 'b, c');
  }

  Future<void> test_ArgDefaults_method_none() async {
    addTestSource('''
class A {
  bool a() => false;
}

void main() {new A().a^}''');
    await computeSuggestions();

    assertSuggestMethod('a', 'A', 'bool', defaultArgListString: null);
  }

  Future<void> test_ArgDefaults_method_with_optional_positional() async {
    addTestSource('''
import 'package:meta/meta.dart';

class A {
  bool foo(int bar, [bool boo, int baz]) => false;
}

void main() {new A().f^}''');
    await computeSuggestions();

    assertSuggestMethod('foo', 'A', 'bool', defaultArgListString: 'bar');
  }

  Future<void> test_ArgDefaults_method_with_required_named() async {
    addTestSource('''
import 'package:meta/meta.dart';

class A {
  bool foo(int bar, {bool boo, @required int baz}) => false;
}

void main() {new A().f^}''');
    await computeSuggestions();

    assertSuggestMethod('foo', 'A', 'bool',
        defaultArgListString: 'bar, baz: baz');
  }

  Future<void> test_ArgumentList() async {
    // ArgumentList  MethodInvocation  ExpressionStatement  Block
    addSource('/home/test/lib/a.dart', '''
        library A;
        bool hasLength(int expected) { }
        void baz() { }''');
    addTestSource('''
        import 'a.dart';;
        class B { }
        String bar() => true;
        void main() {expect(^)}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('bar');
    assertNotSuggested('hasLength');
    assertNotSuggested('identical');
    assertNotSuggested('B');
    assertNotSuggested('Object');
    assertNotSuggested('main');
    assertNotSuggested('baz');
    assertNotSuggested('print');
  }

  Future<void> test_ArgumentList_imported_function() async {
    // ArgumentList  MethodInvocation  ExpressionStatement  Block
    addSource('/home/test/lib/a.dart', '''
        library A;
        bool hasLength(int expected) { }
        expect(arg) { }
        void baz() { }''');
    addTestSource('''
        import 'a.dart';
        class B { }
        String bar() => true;
        void main() {expect(^)}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('bar');
    assertNotSuggested('hasLength');
    assertNotSuggested('identical');
    assertNotSuggested('B');
    assertNotSuggested('Object');
    assertNotSuggested('main');
    assertNotSuggested('baz');
    assertNotSuggested('print');
  }

  Future<void>
      test_ArgumentList_InstanceCreationExpression_functionalArg() async {
    // ArgumentList  InstanceCreationExpression  ExpressionStatement  Block
    addSource('/home/test/lib/a.dart', '''
        library A;
        class A { A(f()) { } }
        bool hasLength(int expected) { }
        void baz() { }''');
    addTestSource('''
        import 'dart:async';
        import 'a.dart';;
        class B { }
        String bar() => true;
        void main() {new A(^)}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('bar');
    assertNotSuggested('hasLength');
    assertNotSuggested('identical');
    assertNotSuggested('B');
    assertNotSuggested('A');
    assertNotSuggested('Object');
    assertNotSuggested('main');
    assertNotSuggested('baz');
    assertNotSuggested('print');
  }

  Future<void> test_ArgumentList_InstanceCreationExpression_typedefArg() async {
    // ArgumentList  InstanceCreationExpression  ExpressionStatement  Block
    addSource('/home/test/lib/a.dart', '''
        library A;
        typedef Funct();
        class A { A(Funct f) { } }
        bool hasLength(int expected) { }
        void baz() { }''');
    addTestSource('''
        import 'dart:async';
        import 'a.dart';;
        class B { }
        String bar() => true;
        void main() {new A(^)}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('bar');
    assertNotSuggested('hasLength');
    assertNotSuggested('identical');
    assertNotSuggested('B');
    assertNotSuggested('A');
    assertNotSuggested('Object');
    assertNotSuggested('main');
    assertNotSuggested('baz');
    assertNotSuggested('print');
  }

  Future<void> test_ArgumentList_local_function() async {
    // ArgumentList  MethodInvocation  ExpressionStatement  Block
    addSource('/home/test/lib/a.dart', '''
        library A;
        bool hasLength(int expected) { }
        void baz() { }''');
    addTestSource('''
        import 'a.dart';
        expect(arg) { }
        class B { }
        String bar() => true;
        void main() {expect(^)}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('bar');
    assertNotSuggested('hasLength');
    assertNotSuggested('identical');
    assertNotSuggested('B');
    assertNotSuggested('Object');
    assertNotSuggested('main');
    assertNotSuggested('baz');
    assertNotSuggested('print');
  }

  Future<void> test_ArgumentList_local_method() async {
    // ArgumentList  MethodInvocation  ExpressionStatement  Block
    addSource('/home/test/lib/a.dart', '''
        library A;
        bool hasLength(int expected) { }
        void baz() { }''');
    addTestSource('''
        import 'a.dart';
        class B {
          expect(arg) { }
          void foo() {expect(^)}}
        String bar() => true;''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('bar');
    assertNotSuggested('hasLength');
    assertNotSuggested('identical');
    assertNotSuggested('B');
    assertNotSuggested('Object');
    assertNotSuggested('main');
    assertNotSuggested('baz');
    assertNotSuggested('print');
  }

  Future<void> test_ArgumentList_MethodInvocation_functionalArg() async {
    // ArgumentList  MethodInvocation  ExpressionStatement  Block
    addSource('/home/test/lib/a.dart', '''
        library A;
        class A { A(f()) { } }
        bool hasLength(int expected) { }
        void baz() { }''');
    addTestSource('''
        import 'dart:async';
        import 'a.dart';;
        class B { }
        String bar(f()) => true;
        void main() {bar(^);}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('bar');
    assertNotSuggested('hasLength');
    assertNotSuggested('identical');
    assertNotSuggested('B');
    assertNotSuggested('A');
    assertNotSuggested('Object');
    assertNotSuggested('main');
    assertNotSuggested('baz');
    assertNotSuggested('print');
  }

  Future<void> test_ArgumentList_MethodInvocation_methodArg() async {
    // ArgumentList  MethodInvocation  ExpressionStatement  Block
    addSource('/home/test/lib/a.dart', '''
        library A;
        class A { A(f()) { } }
        bool hasLength(int expected) { }
        void baz() { }''');
    addTestSource('''
        import 'dart:async';
        import 'a.dart';;
        class B { String bar(f()) => true; }
        void main() {new B().bar(^);}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('hasLength');
    assertNotSuggested('identical');
    assertNotSuggested('B');
    assertNotSuggested('A');
    assertNotSuggested('Object');
    assertNotSuggested('main');
    assertNotSuggested('baz');
    assertNotSuggested('print');
  }

  Future<void> test_ArgumentList_namedParam() async {
    // SimpleIdentifier  NamedExpression  ArgumentList  MethodInvocation
    // ExpressionStatement
    addSource('/home/test/lib/a.dart', '''
        library A;
        bool hasLength(int expected) { }''');
    addTestSource('''
        import 'a.dart';
        String bar() => true;
        void main() {expect(foo: ^)}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('bar');
    assertNotSuggested('hasLength');
    assertNotSuggested('main');
  }

  Future<void> test_AsExpression() async {
    // SimpleIdentifier  TypeName  AsExpression
    addTestSource('''
        class A {var b; X _c; foo() {var a; (a as ^).foo();}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('b');
    assertNotSuggested('_c');
    assertNotSuggested('Object');
    assertNotSuggested('A');
    assertNotSuggested('==');
  }

  Future<void> test_AssignmentExpression_name() async {
    // SimpleIdentifier  VariableDeclaration  VariableDeclarationList
    // VariableDeclarationStatement  Block
    addTestSource('class A {} main() {int a; int ^b = 1;}');
    await computeSuggestions();
    assertNoSuggestions();
  }

  Future<void> test_AssignmentExpression_RHS() async {
    // SimpleIdentifier  VariableDeclaration  VariableDeclarationList
    // VariableDeclarationStatement  Block
    addTestSource('class A {} main() {int a; int b = ^}');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('a');
    assertNotSuggested('main');
    assertNotSuggested('A');
    assertNotSuggested('Object');
  }

  Future<void> test_AssignmentExpression_type() async {
    // SimpleIdentifier  TypeName  VariableDeclarationList
    // VariableDeclarationStatement  Block
    addTestSource('''
        class A {} main() {
          int a;
          ^ b = 1;}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('A');
    assertNotSuggested('int');
    // TODO (danrubel) When entering 1st of 2 identifiers on assignment LHS
    // the user may be either (1) entering a type for the assignment
    // or (2) starting a new statement.
    // Consider suggesting only types
    // if only spaces separates the 1st and 2nd identifiers.
    //assertNotSuggested('a');
    //assertNotSuggested('main');
    //assertNotSuggested('identical');
  }

  Future<void> test_AssignmentExpression_type_newline() async {
    // SimpleIdentifier  TypeName  VariableDeclarationList
    // VariableDeclarationStatement  Block
    addTestSource('''
        class A {} main() {
          int a;
          ^
          b = 1;}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('A');
    assertNotSuggested('int');
    // Allow non-types preceding an identifier on LHS of assignment
    // if newline follows first identifier
    // because user is probably starting a new statement
    assertNotSuggested('a');
    assertNotSuggested('main');
    assertNotSuggested('identical');
  }

  Future<void> test_AssignmentExpression_type_partial() async {
    // SimpleIdentifier  TypeName  VariableDeclarationList
    // VariableDeclarationStatement  Block
    addTestSource('''
        class A {} main() {
          int a;
          int^ b = 1;}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset! - 3);
    expect(replacementLength, 3);
    assertNotSuggested('A');
    assertNotSuggested('int');
    // TODO (danrubel) When entering 1st of 2 identifiers on assignment LHS
    // the user may be either (1) entering a type for the assignment
    // or (2) starting a new statement.
    // Consider suggesting only types
    // if only spaces separates the 1st and 2nd identifiers.
    //assertNotSuggested('a');
    //assertNotSuggested('main');
    //assertNotSuggested('identical');
  }

  Future<void> test_AssignmentExpression_type_partial_newline() async {
    // SimpleIdentifier  TypeName  VariableDeclarationList
    // VariableDeclarationStatement  Block
    addTestSource('''
        class A {} main() {
          int a;
          i^
          b = 1;}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset! - 1);
    expect(replacementLength, 1);
    assertNotSuggested('A');
    assertNotSuggested('int');
    // Allow non-types preceding an identifier on LHS of assignment
    // if newline follows first identifier
    // because user is probably starting a new statement
    assertNotSuggested('a');
    assertNotSuggested('main');
    assertNotSuggested('identical');
  }

  Future<void> test_AwaitExpression() async {
    // SimpleIdentifier  AwaitExpression  ExpressionStatement
    addTestSource('''
        class A {int x; int y() => 0;}
        main() async {A a; await ^}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('a');
    assertNotSuggested('main');
    assertNotSuggested('A');
    assertNotSuggested('Object');
  }

  Future<void> test_BinaryExpression_LHS() async {
    // SimpleIdentifier  BinaryExpression  VariableDeclaration
    // VariableDeclarationList  VariableDeclarationStatement
    addTestSource('main() {int a = 1, b = ^ + 2;}');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('a');
    assertNotSuggested('Object');
    assertNotSuggested('b');
  }

  Future<void> test_BinaryExpression_RHS() async {
    // SimpleIdentifier  BinaryExpression  VariableDeclaration
    // VariableDeclarationList  VariableDeclarationStatement
    addTestSource('main() {int a = 1, b = 2 + ^;}');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('a');
    assertNotSuggested('Object');
    assertNotSuggested('b');
    assertNotSuggested('==');
  }

  Future<void> test_Block() async {
    // Block  BlockFunctionBody  MethodDeclaration
    addSource('/testAB.dart', '''
        export "dart:math" hide max;
        class A {int x;}
        @deprecated D1() {int x;}
        class _B {boo() { partBoo() {}} }''');
    addSource('/testCD.dart', '''
        String T1;
        var _T2;
        class C { }
        class D { }''');
    addSource('/testEEF.dart', '''
        class EE { }
        class F { }''');
    addSource('/testG.dart', 'class G { }');
    addSource('/testH.dart', '''
        class H { }
        int T3;
        var _T4;'''); // not imported
    addTestSource('''
        import "testAB.dart";
        import "testCD.dart" hide D;
        import "testEEF.dart" show EE;
        import "testG.dart" as g;
        int T5;
        var _T6;
        String get T7 => 'hello';
        set T8(int value) { partT8() {} }
        Z D2() {int x;}
        class X {
          int get clog => 8;
          set blog(value) { }
          a() {
            var f;
            localF(int arg1) { }
            {var x;}
            ^ var r;
          }
          void b() { }}
        class Z { }''');
    await computeSuggestions();

    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);

    assertNotSuggested('X');
    assertNotSuggested('Z');
    assertNotSuggested('a');
    assertNotSuggested('b');
    assertNotSuggested('localF');
    assertNotSuggested('f');
    // Don't suggest locals out of scope
    assertNotSuggested('r');
    assertNotSuggested('x');
    assertNotSuggested('partT8');

    assertNotSuggested('A');
    assertNotSuggested('_B');
    assertNotSuggested('C');
    assertNotSuggested('partBoo');
    // hidden element suggested as low relevance
    // but imported results are partially filtered
    //assertNotSuggested('D');
    //assertNotSuggested(
    //    'D1', null, true, COMPLETION_RELEVANCE_LOW);
    assertNotSuggested('D2');
    assertNotSuggested('EE');
    // hidden element suggested as low relevance
    //assertNotSuggested('F');
    assertNotSuggested('g');
    assertNotSuggested('G');
    //assertNotSuggested('H');
    assertNotSuggested('Object');
    assertNotSuggested('min');
    assertNotSuggested('_T2');
    //assertSuggestImportedTopLevelVar('T3', 'int', COMPLETION_RELEVANCE_LOW);
    assertNotSuggested('_T4');
    assertNotSuggested('T5');
    assertNotSuggested('_T6');
    assertNotSuggested('==');
    assertNotSuggested('T7');
    assertNotSuggested('T8');
    assertNotSuggested('clog');
    assertNotSuggested('blog');
    // TODO (danrubel) suggest HtmlElement as low relevance
    assertNotSuggested('HtmlElement');
    assertNotSuggested('Uri');
    assertNotSuggested('parseIPv6Address');
    assertNotSuggested('parseHex');
  }

  Future<void> test_Block_final() async {
    // Block  BlockFunctionBody  MethodDeclaration
    addSource('/testAB.dart', '''
        export "dart:math" hide max;
        class A {int x;}
        @deprecated D1() {int x;}
        class _B {boo() { partBoo() {}} }''');
    addSource('/testCD.dart', '''
        String T1;
        var _T2;
        class C { }
        class D { }''');
    addSource('/testEEF.dart', '''
        class EE { }
        class F { }''');
    addSource('/testG.dart', 'class G { }');
    addSource('/testH.dart', '''
        class H { }
        int T3;
        var _T4;'''); // not imported
    addTestSource('''
        import "testAB.dart";
        import "testCD.dart" hide D;
        import "testEEF.dart" show EE;
        import "testG.dart" as g;
        int T5;
        var _T6;
        String get T7 => 'hello';
        set T8(int value) { partT8() {} }
        Z D2() {int x;}
        class X {
          int get clog => 8;
          set blog(value) { }
          a() {
            var f;
            localF(int arg1) { }
            {var x;}
            final ^
          }
          void b() { }}
        class Z { }''');
    await computeSuggestions();

    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);

    assertNotSuggested('X');
    assertNotSuggested('Z');
    assertNotSuggested('a');
    assertNotSuggested('b');
    assertNotSuggested('localF');
    assertNotSuggested('f');
    // Don't suggest locals out of scope
    assertNotSuggested('r');
    assertNotSuggested('x');
    assertNotSuggested('partT8');

    assertNotSuggested('A');
    assertNotSuggested('_B');
    assertNotSuggested('C');
    assertNotSuggested('partBoo');
    // hidden element suggested as low relevance
    // but imported results are partially filtered
    //assertNotSuggested('D');
    //assertNotSuggested(
    //    'D1', null, true, COMPLETION_RELEVANCE_LOW);
    assertNotSuggested('D2');
    assertNotSuggested('EE');
    // hidden element suggested as low relevance
    //assertNotSuggested('F');
    assertNotSuggested('g');
    assertNotSuggested('G');
    //assertNotSuggested('H');
    assertNotSuggested('Object');
    assertNotSuggested('min');
    //assertNotSuggested(
    //    'max',
    //    'num',
    //    false,
    //    COMPLETION_RELEVANCE_LOW);
    assertNotSuggested('T1');
    assertNotSuggested('_T2');
    //assertSuggestImportedTopLevelVar('T3', 'int', COMPLETION_RELEVANCE_LOW);
    assertNotSuggested('_T4');
    assertNotSuggested('T5');
    assertNotSuggested('_T6');
    assertNotSuggested('==');
    assertNotSuggested('T7');
    assertNotSuggested('T8');
    assertNotSuggested('clog');
    assertNotSuggested('blog');
    // TODO (danrubel) suggest HtmlElement as low relevance
    assertNotSuggested('HtmlElement');
    assertNotSuggested('Uri');
    assertNotSuggested('parseIPv6Address');
    assertNotSuggested('parseHex');
  }

  Future<void> test_Block_final2() async {
    addTestSource('main() {final S^ v;}');
    await computeSuggestions();

    assertNotSuggested('String');
  }

  Future<void> test_Block_final3() async {
    addTestSource('main() {final ^ v;}');
    await computeSuggestions();

    assertNotSuggested('String');
  }

  Future<void> test_Block_final_final() async {
    // Block  BlockFunctionBody  MethodDeclaration
    addSource('/testAB.dart', '''
        export "dart:math" hide max;
        class A {int x;}
        @deprecated D1() {int x;}
        class _B {boo() { partBoo() {}} }''');
    addSource('/testCD.dart', '''
        String T1;
        var _T2;
        class C { }
        class D { }''');
    addSource('/testEEF.dart', '''
        class EE { }
        class F { }''');
    addSource('/testG.dart', 'class G { }');
    addSource('/testH.dart', '''
        class H { }
        int T3;
        var _T4;'''); // not imported
    addTestSource('''
        import "testAB.dart";
        import "testCD.dart" hide D;
        import "testEEF.dart" show EE;
        import "testG.dart" as g;
        int T5;
        var _T6;
        String get T7 => 'hello';
        set T8(int value) { partT8() {} }
        Z D2() {int x;}
        class X {
          int get clog => 8;
          set blog(value) { }
          a() {
            final ^
            final var f;
            localF(int arg1) { }
            {var x;}
          }
          void b() { }}
        class Z { }''');
    await computeSuggestions();

    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);

    assertNotSuggested('X');
    assertNotSuggested('Z');
    assertNotSuggested('a');
    assertNotSuggested('b');
    assertNotSuggested('localF');
    assertNotSuggested('f');
    // Don't suggest locals out of scope
    assertNotSuggested('r');
    assertNotSuggested('x');
    assertNotSuggested('partT8');

    assertNotSuggested('A');
    assertNotSuggested('_B');
    assertNotSuggested('C');
    assertNotSuggested('partBoo');
    // hidden element suggested as low relevance
    // but imported results are partially filtered
    //assertNotSuggested('D');
    //assertNotSuggested(
    //    'D1', null, true, COMPLETION_RELEVANCE_LOW);
    assertNotSuggested('D2');
    assertNotSuggested('EE');
    // hidden element suggested as low relevance
    //assertNotSuggested('F');
    assertNotSuggested('g');
    assertNotSuggested('G');
    //assertNotSuggested('H');
    assertNotSuggested('Object');
    assertNotSuggested('min');
    //assertNotSuggested(
    //    'max',
    //    'num',
    //    false,
    //    COMPLETION_RELEVANCE_LOW);
    assertNotSuggested('T1');
    assertNotSuggested('_T2');
    //assertSuggestImportedTopLevelVar('T3', 'int', COMPLETION_RELEVANCE_LOW);
    assertNotSuggested('_T4');
    assertNotSuggested('T5');
    assertNotSuggested('_T6');
    assertNotSuggested('==');
    assertNotSuggested('T7');
    assertNotSuggested('T8');
    assertNotSuggested('clog');
    assertNotSuggested('blog');
    // TODO (danrubel) suggest HtmlElement as low relevance
    assertNotSuggested('HtmlElement');
    assertNotSuggested('Uri');
    assertNotSuggested('parseIPv6Address');
    assertNotSuggested('parseHex');
  }

  Future<void> test_Block_final_var() async {
    // Block  BlockFunctionBody  MethodDeclaration
    addSource('/testAB.dart', '''
        export "dart:math" hide max;
        class A {int x;}
        @deprecated D1() {int x;}
        class _B {boo() { partBoo() {}} }''');
    addSource('/testCD.dart', '''
        String T1;
        var _T2;
        class C { }
        class D { }''');
    addSource('/testEEF.dart', '''
        class EE { }
        class F { }''');
    addSource('/testG.dart', 'class G { }');
    addSource('/testH.dart', '''
        class H { }
        int T3;
        var _T4;'''); // not imported
    addTestSource('''
        import "testAB.dart";
        import "testCD.dart" hide D;
        import "testEEF.dart" show EE;
        import "testG.dart" as g;
        int T5;
        var _T6;
        String get T7 => 'hello';
        set T8(int value) { partT8() {} }
        Z D2() {int x;}
        class X {
          int get clog => 8;
          set blog(value) { }
          a() {
            final ^
            var f;
            localF(int arg1) { }
            {var x;}
          }
          void b() { }}
        class Z { }''');
    await computeSuggestions();

    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);

    assertNotSuggested('X');
    assertNotSuggested('Z');
    assertNotSuggested('a');
    assertNotSuggested('b');
    assertNotSuggested('localF');
    assertNotSuggested('f');
    // Don't suggest locals out of scope
    assertNotSuggested('r');
    assertNotSuggested('x');
    assertNotSuggested('partT8');

    assertNotSuggested('A');
    assertNotSuggested('_B');
    assertNotSuggested('C');
    assertNotSuggested('partBoo');
    // hidden element suggested as low relevance
    // but imported results are partially filtered
    //assertNotSuggested('D');
    //assertNotSuggested(
    //    'D1', null, true, COMPLETION_RELEVANCE_LOW);
    assertNotSuggested('D2');
    assertNotSuggested('EE');
    // hidden element suggested as low relevance
    //assertNotSuggested('F');
    assertNotSuggested('g');
    assertNotSuggested('G');
    //assertNotSuggested('H');
    assertNotSuggested('Object');
    assertNotSuggested('min');
    //assertNotSuggested(
    //    'max',
    //    'num',
    //    false,
    //    COMPLETION_RELEVANCE_LOW);
    assertNotSuggested('T1');
    assertNotSuggested('_T2');
    //assertSuggestImportedTopLevelVar('T3', 'int', COMPLETION_RELEVANCE_LOW);
    assertNotSuggested('_T4');
    assertNotSuggested('T5');
    assertNotSuggested('_T6');
    assertNotSuggested('==');
    assertNotSuggested('T7');
    assertNotSuggested('T8');
    assertNotSuggested('clog');
    assertNotSuggested('blog');
    // TODO (danrubel) suggest HtmlElement as low relevance
    assertNotSuggested('HtmlElement');
    assertNotSuggested('Uri');
    assertNotSuggested('parseIPv6Address');
    assertNotSuggested('parseHex');
  }

  Future<void> test_Block_identifier_partial() async {
    addSource('/testAB.dart', '''
        export "dart:math" hide max;
        class A {int x;}
        @deprecated D1() {int x;}
        class _B { }''');
    addSource('/testCD.dart', '''
        String T1;
        var _T2;
        class C { }
        class D { }''');
    addSource('/testEEF.dart', '''
        class EE { }
        class F { }''');
    addSource('/testG.dart', 'class G { }');
    addSource('/testH.dart', '''
        class H { }
        class D3 { }
        int T3;
        var _T4;'''); // not imported
    addTestSource('''
        import "testAB.dart";
        import "testCD.dart" hide D;
        import "testEEF.dart" show EE;
        import "testG.dart" as g;
        int T5;
        var _T6;
        Z D2() {int x;}
        class X {a() {var f; {var x;} D^ var r;} void b() { }}
        class Z { }''');
    await computeSuggestions();

    expect(replacementOffset, completionOffset! - 1);
    expect(replacementLength, 1);

    assertNotSuggested('X');
    assertNotSuggested('Z');
    assertNotSuggested('a');
    assertNotSuggested('b');
    assertNotSuggested('f');
    // Don't suggest locals out of scope
    assertNotSuggested('r');
    assertNotSuggested('x');

    // imported elements are portially filtered
    //assertNotSuggested('A');
    assertNotSuggested('_B');
    //assertNotSuggested('C');
    // hidden element suggested as low relevance
    assertNotSuggested('D');
    assertNotSuggested('D1');
    assertNotSuggested('D2');
    // unimported elements suggested with low relevance
    assertNotSuggested('D3');
    //assertNotSuggested('EE');
    // hidden element suggested as low relevance
    //assertNotSuggested('F');
    //assertNotSuggested('g');
    assertNotSuggested('G');
    //assertNotSuggested('H');
    //assertNotSuggested('Object');
    //assertNotSuggested('min');
    //assertNotSuggested(
    //    'max',
    //    'num',
    //    false,
    //    COMPLETION_RELEVANCE_LOW);
    //assertSuggestTopLevelVarGetterSetter('T1', 'String');
    assertNotSuggested('_T2');
    //assertSuggestImportedTopLevelVar('T3', 'int', COMPLETION_RELEVANCE_LOW);
    assertNotSuggested('_T4');
    //assertNotSuggested('T5');
    //assertNotSuggested('_T6');
    assertNotSuggested('==');
    // TODO (danrubel) suggest HtmlElement as low relevance
    assertNotSuggested('HtmlElement');
  }

  Future<void> test_Block_inherited_imported() async {
    // Block  BlockFunctionBody  MethodDeclaration  ClassDeclaration
    addSource('/home/test/lib/b.dart', '''
        lib B;
        class F { var f1; f2() { } get f3 => 0; set f4(fx) { } var _pf; }
        class E extends F { var e1; e2() { } }
        class I { int i1; i2() { } }
        class M { var m1; int m2() { } }''');
    addTestSource('''
        import 'b.dart';
        class A extends E implements I with M {a() {^}}''');
    await computeSuggestions();

    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    // TODO (danrubel) prefer fields over getters
    // If add `get e1;` to interface I
    // then suggestions include getter e1 rather than field e1
    assertNotSuggested('e1');
    assertNotSuggested('f1');
    assertNotSuggested('i1');
    assertNotSuggested('m1');
    assertNotSuggested('f3');
    assertNotSuggested('f4');
    assertNotSuggested('e2');
    assertNotSuggested('f2');
    assertNotSuggested('i2');
    //assertNotSuggested('m2');
    assertNotSuggested('==');
  }

  Future<void> test_Block_inherited_local() async {
    // Block  BlockFunctionBody  MethodDeclaration  ClassDeclaration
    addTestSource('''
        class F { var f1; f2() { } get f3 => 0; set f4(fx) { } }
        class E extends F { var e1; e2() { } }
        class I { int i1; i2() { } }
        class M { var m1; int m2() { } }
        class A extends E implements I with M {a() {^}}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('e1');
    assertNotSuggested('f1');
    assertNotSuggested('i1');
    assertNotSuggested('m1');
    assertNotSuggested('f3');
    assertNotSuggested('f4');
    assertNotSuggested('e2');
    assertNotSuggested('f2');
    assertNotSuggested('i2');
    assertNotSuggested('m2');
  }

  Future<void> test_Block_local_function() async {
    addSource('/testAB.dart', '''
        export "dart:math" hide max;
        class A {int x;}
        @deprecated D1() {int x;}
        class _B {boo() { partBoo() {}} }''');
    addSource('/testCD.dart', '''
        String T1;
        var _T2;
        class C { }
        class D { }''');
    addSource('/testEEF.dart', '''
        class EE { }
        class F { }''');
    addSource('/testG.dart', 'class G { }');
    addSource('/testH.dart', '''
        class H { }
        int T3;
        var _T4;'''); // not imported
    addTestSource('''
        import "testAB.dart";
        import "testCD.dart" hide D;
        import "testEEF.dart" show EE;
        import "testG.dart" as g;
        int T5;
        var _T6;
        String get T7 => 'hello';
        set T8(int value) { partT8() {} }
        Z D2() {int x;}
        class X {
          int get clog => 8;
          set blog(value) { }
          a() {
            var f;
            localF(int arg1) { }
            {var x;}
            p^ var r;
          }
          void b() { }}
        class Z { }''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset! - 1);
    expect(replacementLength, 1);
    assertNotSuggested('partT8');
    assertNotSuggested('partBoo');
    assertNotSuggested('parseIPv6Address');
    assertNotSuggested('parseHex');
  }

  Future<void> test_Block_unimported() async {
    newFile('$workspaceRootPath/myBar/bar.dart',
        content: 'class Foo2 { Foo2() { } }');
    addSource(
        '/proj/testAB.dart', 'import "package:myBar/bar.dart"; class Foo { }');
    addTestSource('class C {foo(){F^}}');
    await computeSuggestions();
    expect(replacementOffset, completionOffset! - 1);
    expect(replacementLength, 1);
    assertNotSuggested('Foo');
    // TODO(danrubel) implement
    assertNotSuggested('Foo2');
    assertNotSuggested('Future');
  }

  Future<void> test_CascadeExpression_method1() async {
    // PropertyAccess  CascadeExpression  ExpressionStatement  Block
    addSource('/home/test/lib/b.dart', '''
        class B { }''');
    addTestSource('''
        import 'b.dart';
        class A {var b; X _c;}
        class X{}
        // looks like a cascade to the parser
        // but the user is trying to get completions for a non-cascade
        main() {A a; a.^.z()}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertSuggestField('b', null);
    assertSuggestField('_c', 'X');
    assertNotSuggested('Object');
    assertNotSuggested('A');
    assertNotSuggested('B');
    assertNotSuggested('X');
    assertNotSuggested('z');
    assertNotSuggested('==');
  }

  Future<void> test_CascadeExpression_selector1() async {
    // PropertyAccess  CascadeExpression  ExpressionStatement  Block
    addSource('/home/test/lib/b.dart', '''
        class B { }''');
    addTestSource('''
        import 'b.dart';
        class A {var b; X _c;}
        class X{}
        // looks like a cascade to the parser
        // but the user is trying to get completions for a non-cascade
        main() {A a; a.^.z}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertSuggestField('b', null);
    assertSuggestField('_c', 'X');
    assertNotSuggested('Object');
    assertNotSuggested('A');
    assertNotSuggested('B');
    assertNotSuggested('X');
    assertNotSuggested('z');
    assertNotSuggested('==');
  }

  Future<void> test_CascadeExpression_selector2() async {
    // SimpleIdentifier  PropertyAccess  CascadeExpression  ExpressionStatement
    addSource('/home/test/lib/b.dart', '''
        class B { }''');
    addTestSource('''
        import 'b.dart';
        class A {var b; X _c;}
        class X{}
        main() {A a; a..^z}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 1);
    assertSuggestField('b', null);
    assertSuggestField('_c', 'X');
    assertNotSuggested('Object');
    assertNotSuggested('A');
    assertNotSuggested('B');
    assertNotSuggested('X');
    assertNotSuggested('z');
    assertNotSuggested('==');
  }

  Future<void> test_CascadeExpression_selector2_withTrailingReturn() async {
    // PropertyAccess  CascadeExpression  ExpressionStatement  Block
    addSource('/home/test/lib/b.dart', '''
        class B { }''');
    addTestSource('''
        import 'b.dart';
        class A {var b; X _c;}
        class X{}
        main() {A a; a..^ return}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertSuggestField('b', null);
    assertSuggestField('_c', 'X');
    assertNotSuggested('Object');
    assertNotSuggested('A');
    assertNotSuggested('B');
    assertNotSuggested('X');
    assertNotSuggested('z');
    assertNotSuggested('==');
  }

  Future<void> test_CascadeExpression_target() async {
    // SimpleIdentifier  CascadeExpression  ExpressionStatement
    addTestSource('''
        class A {var b; X _c;}
        class X{}
        main() {A a; a^..b}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset! - 1);
    expect(replacementLength, 1);
    assertNotSuggested('b');
    assertNotSuggested('_c');
    assertNotSuggested('a');
    assertNotSuggested('A');
    assertNotSuggested('X');
    // top level results are partially filtered
    //assertNotSuggested('Object');
    assertNotSuggested('==');
  }

  Future<void> test_CatchClause_onType() async {
    // TypeName  CatchClause  TryStatement
    addTestSource('class A {a() {try{var x;} on ^ {}}}');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('A');
    assertNotSuggested('Object');
    assertNotSuggested('a');
    assertNotSuggested('x');
  }

  Future<void> test_CatchClause_onType_noBrackets() async {
    // TypeName  CatchClause  TryStatement
    addTestSource('class A {a() {try{var x;} on ^}}');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('A');
    assertNotSuggested('Object');
    assertNotSuggested('x');
  }

  Future<void> test_CatchClause_typed() async {
    // Block  CatchClause  TryStatement
    addTestSource('class A {a() {try{var x;} on E catch (e) {^}}}');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('e');
    assertNotSuggested('a');
    assertNotSuggested('Object');
    assertNotSuggested('x');
  }

  Future<void> test_CatchClause_untyped() async {
    // Block  CatchClause  TryStatement
    addTestSource('class A {a() {try{var x;} catch (e, s) {^}}}');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('e');
    assertNotSuggested('s');
    assertNotSuggested('a');
    assertNotSuggested('Object');
    assertNotSuggested('x');
  }

  Future<void> test_ClassDeclaration_body() async {
    // ClassDeclaration  CompilationUnit
    addSource('/home/test/lib/b.dart', '''
        class B { }''');
    addTestSource('''
        import 'b.dart'; as x;
        @deprecated class A {^}
        class _B {}
        A T;''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('A');
    assertNotSuggested('_B');
    assertNotSuggested('Object');
    assertNotSuggested('T');
    assertNotSuggested('x');
  }

  Future<void> test_ClassDeclaration_body_final() async {
    // ClassDeclaration  CompilationUnit
    addSource('/home/test/lib/b.dart', '''
        class B { }''');
    addTestSource('''
        import 'b.dart'; as x;
        class A {final ^}
        class _B {}
        A T;''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('A');
    assertNotSuggested('_B');
    assertNotSuggested('Object');
    assertNotSuggested('T');
    assertNotSuggested('x');
  }

  Future<void> test_ClassDeclaration_body_final_field() async {
    // ClassDeclaration  CompilationUnit
    addSource('/home/test/lib/b.dart', '''
        class B { }''');
    addTestSource('''
        import 'b.dart'; as x;
        class A {final ^ A(){}}
        class _B {}
        A T;''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('A');
    assertNotSuggested('_B');
    assertNotSuggested('String');
    assertNotSuggested('T');
    assertNotSuggested('x');
  }

  Future<void> test_ClassDeclaration_body_final_field2() async {
    // ClassDeclaration  CompilationUnit
    addSource('/home/test/lib/b.dart', '''
        class B { }''');
    addTestSource('''
        import 'b.dart'; as Soo;
        class A {final S^ A();}
        class _B {}
        A Sew;''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset! - 1);
    expect(replacementLength, 1);
    assertNotSuggested('A');
    assertNotSuggested('_B');
    assertNotSuggested('String');
    assertNotSuggested('Sew');
    assertNotSuggested('Soo');
  }

  Future<void> test_ClassDeclaration_body_final_final() async {
    // ClassDeclaration  CompilationUnit
    addSource('/home/test/lib/b.dart', '''
        class B { }''');
    addTestSource('''
        import 'b.dart'; as x;
        class A {final ^ final foo;}
        class _B {}
        A T;''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('A');
    assertNotSuggested('_B');
    assertNotSuggested('Object');
    assertNotSuggested('T');
    assertNotSuggested('x');
  }

  Future<void> test_ClassDeclaration_body_final_var() async {
    // ClassDeclaration  CompilationUnit
    addSource('/home/test/lib/b.dart', '''
        class B { }''');
    addTestSource('''
        import 'b.dart'; as x;
        class A {final ^ var foo;}
        class _B {}
        A T;''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('A');
    assertNotSuggested('_B');
    assertNotSuggested('Object');
    assertNotSuggested('T');
    assertNotSuggested('x');
  }

  Future<void> test_Combinator_hide() async {
    // SimpleIdentifier  HideCombinator  ImportDirective
    addSource('/testAB.dart', '''
        library libAB;
        part 'partAB.dart';
        class A { }
        class B { }''');
    addSource('/partAB.dart', '''
        part of libAB;
        var T1;
        PB F1() => new PB();
        class PB { }''');
    addSource('/testCD.dart', '''
        class C { }
        class D { }''');
    addTestSource('''
        import "testAB.dart" hide ^;
        import "testCD.dart";
        class X {}''');
    await computeSuggestions();
    assertNoSuggestions();
  }

  Future<void> test_Combinator_show() async {
    // SimpleIdentifier  HideCombinator  ImportDirective
    addSource('/testAB.dart', '''
        library libAB;
        part 'partAB.dart';
        class A { }
        class B { }''');
    addSource('/partAB.dart', '''
        part of libAB;
        var T1;
        PB F1() => new PB();
        typedef PB2 F2(int blat);
        class Clz = Object with Object;
        class PB { }''');
    addSource('/testCD.dart', '''
        class C { }
        class D { }''');
    addTestSource('''
        import "testAB.dart" show ^;
        import "testCD.dart";
        class X {}''');
    await computeSuggestions();
    assertNoSuggestions();
  }

  Future<void> test_ConditionalExpression_elseExpression() async {
    // SimpleIdentifier  ConditionalExpression  ReturnStatement
    addSource('/home/test/lib/a.dart', '''
        int T1;
        F1() { }
        class A {int x;}''');
    addTestSource('''
        import "a.dart";
        int T2;
        F2() { }
        class B {int x;}
        class C {foo(){var f; {var x;} return a ? T1 : T^}}''');
    await computeSuggestions();
    // top level results are partially filtered based on first char
    assertNotSuggested('T2');
    // TODO (danrubel) getter is being suggested instead of top level var
    //assertSuggestImportedTopLevelVar('T1', 'int');
  }

  Future<void> test_ConditionalExpression_elseExpression_empty() async {
    // SimpleIdentifier  ConditionalExpression  ReturnStatement
    addSource('/home/test/lib/a.dart', '''
        int T1;
        F1() { }
        class A {int x;}''');
    addTestSource('''
        import "a.dart";
        int T2;
        F2() { }
        class B {int x;}
        class C {foo(){var f; {var x;} return a ? T1 : ^}}''');
    await computeSuggestions();
    assertNotSuggested('x');
    assertNotSuggested('f');
    assertNotSuggested('foo');
    assertNotSuggested('C');
    assertNotSuggested('F2');
    assertNotSuggested('T2');
    assertNotSuggested('A');
    assertNotSuggested('F1');
    // TODO (danrubel) getter is being suggested instead of top level var
    //assertSuggestImportedTopLevelVar('T1', 'int');
  }

  Future<void> test_ConditionalExpression_partial_thenExpression() async {
    // SimpleIdentifier  ConditionalExpression  ReturnStatement
    addSource('/home/test/lib/a.dart', '''
        int T1;
        F1() { }
        class A {int x;}''');
    addTestSource('''
        import "a.dart";
        int T2;
        F2() { }
        class B {int x;}
        class C {foo(){var f; {var x;} return a ? T^}}''');
    await computeSuggestions();
    // top level results are partially filtered based on first char
    assertNotSuggested('T2');
    // TODO (danrubel) getter is being suggested instead of top level var
    //assertSuggestImportedTopLevelVar('T1', 'int');
  }

  Future<void> test_ConditionalExpression_partial_thenExpression_empty() async {
    // SimpleIdentifier  ConditionalExpression  ReturnStatement
    addSource('/home/test/lib/a.dart', '''
        int T1;
        F1() { }
        class A {int x;}''');
    addTestSource('''
        import "a.dart";
        int T2;
        F2() { }
        class B {int x;}
        class C {foo(){var f; {var x;} return a ? ^}}''');
    await computeSuggestions();
    assertNotSuggested('x');
    assertNotSuggested('f');
    assertNotSuggested('foo');
    assertNotSuggested('C');
    assertNotSuggested('F2');
    assertNotSuggested('T2');
    assertNotSuggested('A');
    assertNotSuggested('F1');
    // TODO (danrubel) getter is being suggested instead of top level var
    //assertSuggestImportedTopLevelVar('T1', 'int');
  }

  Future<void> test_ConditionalExpression_thenExpression() async {
    // SimpleIdentifier  ConditionalExpression  ReturnStatement
    addSource('/home/test/lib/a.dart', '''
        int T1;
        F1() { }
        class A {int x;}''');
    addTestSource('''
        import "a.dart";
        int T2;
        F2() { }
        class B {int x;}
        class C {foo(){var f; {var x;} return a ? T^ : c}}''');
    await computeSuggestions();
    // top level results are partially filtered based on first char
    assertNotSuggested('T2');
    // TODO (danrubel) getter is being suggested instead of top level var
    //assertSuggestImportedTopLevelVar('T1', 'int');
  }

  Future<void> test_ConstructorName_importedClass() async {
    // SimpleIdentifier  PrefixedIdentifier  TypeName  ConstructorName
    // InstanceCreationExpression
    addSource('/home/test/lib/b.dart', '''
        lib B;
        int T1;
        F1() { }
        class X {X.c(); X._d(); z() {}}''');
    addTestSource('''
        import 'b.dart';
        var m;
        main() {new X.^}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    // Suggested by NamedConstructorContributor
    assertNotSuggested('c');
    assertNotSuggested('F1');
    assertNotSuggested('T1');
    assertNotSuggested('_d');
    assertNotSuggested('z');
    assertNotSuggested('m');
  }

  Future<void> test_ConstructorName_importedFactory() async {
    // SimpleIdentifier  PrefixedIdentifier  TypeName  ConstructorName
    // InstanceCreationExpression
    addSource('/home/test/lib/b.dart', '''
        lib B;
        int T1;
        F1() { }
        class X {factory X.c(); factory X._d(); z() {}}''');
    addTestSource('''
        import 'b.dart';
        var m;
        main() {new X.^}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    // Suggested by NamedConstructorContributor
    assertNotSuggested('c');
    assertNotSuggested('F1');
    assertNotSuggested('T1');
    assertNotSuggested('_d');
    assertNotSuggested('z');
    assertNotSuggested('m');
  }

  Future<void> test_ConstructorName_importedFactory2() async {
    // SimpleIdentifier  PrefixedIdentifier  TypeName  ConstructorName
    // InstanceCreationExpression
    addTestSource('''
        main() {new String.fr^omCharCodes([]);}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset! - 2);
    expect(replacementLength, 13);
    // Suggested by NamedConstructorContributor
    assertNotSuggested('fromCharCodes');
    assertNotSuggested('isEmpty');
    assertNotSuggested('isNotEmpty');
    assertNotSuggested('length');
    assertNotSuggested('Object');
    assertNotSuggested('String');
  }

  Future<void> test_ConstructorName_localClass() async {
    // SimpleIdentifier  PrefixedIdentifier  TypeName  ConstructorName
    // InstanceCreationExpression
    addTestSource('''
        int T1;
        F1() { }
        class X {X.c(); X._d(); z() {}}
        main() {new X.^}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    // Suggested by NamedConstructorContributor
    assertNotSuggested('c');
    assertNotSuggested('_d');
    assertNotSuggested('F1');
    assertNotSuggested('T1');
    assertNotSuggested('z');
    assertNotSuggested('m');
  }

  Future<void> test_ConstructorName_localFactory() async {
    // SimpleIdentifier  PrefixedIdentifier  TypeName  ConstructorName
    // InstanceCreationExpression
    addTestSource('''
        int T1;
        F1() { }
        class X {factory X.c(); factory X._d(); z() {}}
        main() {new X.^}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    // Suggested by NamedConstructorContributor
    assertNotSuggested('c');
    assertNotSuggested('_d');
    assertNotSuggested('F1');
    assertNotSuggested('T1');
    assertNotSuggested('z');
    assertNotSuggested('m');
  }

  Future<void> test_DefaultFormalParameter_named_expression() async {
    // DefaultFormalParameter FormalParameterList MethodDeclaration
    addTestSource('''
        foo() { }
        void bar() { }
        class A {a(blat: ^) { }}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('foo');
    assertNotSuggested('a');
    assertNotSuggested('A');
    assertNotSuggested('String');
    assertNotSuggested('identical');
    assertNotSuggested('bar');
  }

  Future<void> test_enumConst() async {
    addTestSource('enum E { one, two } main() {E.^}');
    await computeSuggestions();
    assertNotSuggested('E');
    // Suggested by StaticMemberContributor
    assertNotSuggested('one');
    assertNotSuggested('two');
    assertNotSuggested('index');
    assertNotSuggested('values');
  }

  Future<void> test_enumConst2() async {
    addTestSource('enum E { one, two } main() {E.o^}');
    await computeSuggestions();
    assertNotSuggested('E');
    // Suggested by StaticMemberContributor
    assertNotSuggested('one');
    assertNotSuggested('two');
    assertNotSuggested('index');
    assertNotSuggested('values');
  }

  Future<void> test_enumConst3() async {
    addTestSource('enum E { one, two } main() {E.^ int g;}');
    await computeSuggestions();
    assertNotSuggested('E');
    // Suggested by StaticMemberContributor
    assertNotSuggested('one');
    assertNotSuggested('two');
    assertNotSuggested('index');
    assertNotSuggested('values');
  }

  Future<void> test_enumConst_index() async {
    addTestSource('enum E { one, two } main() {E.one.^}');
    await computeSuggestions();
    assertNotSuggested('E');
    assertNotSuggested('one');
    assertNotSuggested('two');
    assertSuggestField('index', 'int');
    assertNotSuggested('values');
  }

  Future<void> test_enumConst_index2() async {
    addTestSource('enum E { one, two } main() {E.one.i^}');
    await computeSuggestions();
    assertNotSuggested('E');
    assertNotSuggested('one');
    assertNotSuggested('two');
    assertSuggestField('index', 'int');
    assertNotSuggested('values');
  }

  Future<void> test_enumConst_index3() async {
    addTestSource('enum E { one, two } main() {E.one.^ int g;}');
    await computeSuggestions();
    assertNotSuggested('E');
    assertNotSuggested('one');
    assertNotSuggested('two');
    assertSuggestField('index', 'int');
    assertNotSuggested('values');
  }

  Future<void> test_ExpressionStatement_identifier() async {
    // SimpleIdentifier  ExpressionStatement  Block
    addSource('/home/test/lib/a.dart', '''
        _B F1() { }
        class A {int x;}
        class _B { }''');
    addTestSource('''
        import "a.dart";
        typedef int F2(int blat);
        class Clz = Object with Object;
        class C {foo(){^} void bar() {}}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('A');
    assertNotSuggested('F1');
    assertNotSuggested('C');
    assertNotSuggested('foo');
    assertNotSuggested('bar');
    assertNotSuggested('F2');
    assertNotSuggested('Clz');
    assertNotSuggested('C');
    assertNotSuggested('x');
    assertNotSuggested('_B');
  }

  Future<void> test_ExpressionStatement_name() async {
    // ExpressionStatement  Block  BlockFunctionBody  MethodDeclaration
    addSource('/home/test/lib/a.dart', '''
        B T1;
        class B{}''');
    addTestSource('''
        import "a.dart";
        class C {a() {C ^}}''');
    await computeSuggestions();
    assertNoSuggestions();
  }

  Future<void> test_FieldDeclaration_name_typed() async {
    // SimpleIdentifier  VariableDeclaration  VariableDeclarationList
    // FieldDeclaration
    addSource('/home/test/lib/a.dart', 'class A { }');
    addTestSource('''
        import "a.dart";
        class C {A ^}''');
    await computeSuggestions();
    assertNoSuggestions();
  }

  Future<void> test_FieldDeclaration_name_var() async {
    // SimpleIdentifier  VariableDeclaration  VariableDeclarationList
    // FieldDeclaration
    addSource('/home/test/lib/a.dart', 'class A { }');
    addTestSource('''
        import "a.dart";
        class C {var ^}''');
    await computeSuggestions();
    assertNoSuggestions();
  }

  Future<void> test_FieldFormalParameter_in_non_constructor() async {
    // SimpleIdentifer  FieldFormalParameter  FormalParameterList
    addTestSource('class A {B(this.^foo) {}}');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 3);
    assertNoSuggestions();
  }

  Future<void> test_ForEachStatement_body_typed() async {
    // Block  ForEachStatement
    addTestSource('main(args) {for (int foo in bar) {^}}');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('args');
    assertNotSuggested('foo');
    assertNotSuggested('Object');
  }

  Future<void> test_ForEachStatement_body_untyped() async {
    // Block  ForEachStatement
    addTestSource('main(args) {for (foo in bar) {^}}');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('args');
    assertNotSuggested('foo');
    assertNotSuggested('Object');
  }

  Future<void> test_ForEachStatement_iterable() async {
    // SimpleIdentifier  ForEachStatement  Block
    addTestSource('main(args) {for (int foo in ^) {}}');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('args');
    assertNotSuggested('Object');
  }

  Future<void> test_ForEachStatement_loopVariable() async {
    // SimpleIdentifier  ForEachStatement  Block
    addTestSource('main(args) {for (^ in args) {}}');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('args');
    assertNotSuggested('String');
  }

  Future<void> test_ForEachStatement_loopVariable_type() async {
    // SimpleIdentifier  ForEachStatement  Block
    addTestSource('main(args) {for (^ foo in args) {}}');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('args');
    assertNotSuggested('foo');
    assertNotSuggested('String');
  }

  Future<void> test_ForEachStatement_loopVariable_type2() async {
    // DeclaredIdentifier  ForEachStatement  Block
    addTestSource('main(args) {for (S^ foo in args) {}}');
    await computeSuggestions();
    expect(replacementOffset, completionOffset! - 1);
    expect(replacementLength, 1);
    assertNotSuggested('args');
    assertNotSuggested('foo');
    assertNotSuggested('String');
  }

  Future<void> test_FormalParameterList() async {
    // FormalParameterList MethodDeclaration
    addTestSource('''
        foo() { }
        void bar() { }
        class A {a(^) { }}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('foo');
    assertNotSuggested('a');
    assertNotSuggested('A');
    assertNotSuggested('String');
    assertNotSuggested('identical');
    assertNotSuggested('bar');
  }

  Future<void> test_ForStatement_body() async {
    // Block  ForStatement
    addTestSource('main(args) {for (int i; i < 10; ++i) {^}}');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('i');
    assertNotSuggested('Object');
  }

  Future<void> test_ForStatement_condition() async {
    // SimpleIdentifier  ForStatement
    addTestSource('main() {for (int index = 0; i^)}');
    await computeSuggestions();
    expect(replacementOffset, completionOffset! - 1);
    expect(replacementLength, 1);
    assertNotSuggested('index');
  }

  Future<void> test_ForStatement_initializer() async {
    // SimpleIdentifier  ForStatement
    addTestSource('main() {List a; for (^)}');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('a');
    assertNotSuggested('Object');
    assertNotSuggested('int');
  }

  Future<void> test_ForStatement_updaters() async {
    // SimpleIdentifier  ForStatement
    addTestSource('main() {for (int index = 0; index < 10; i^)}');
    await computeSuggestions();
    expect(replacementOffset, completionOffset! - 1);
    expect(replacementLength, 1);
    assertNotSuggested('index');
  }

  Future<void> test_ForStatement_updaters_prefix_expression() async {
    // SimpleIdentifier  PrefixExpression  ForStatement
    addTestSource('''
        void bar() { }
        main() {for (int index = 0; index < 10; ++i^)}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset! - 1);
    expect(replacementLength, 1);
    assertNotSuggested('index');
    assertNotSuggested('main');
    assertNotSuggested('bar');
  }

  Future<void> test_FunctionDeclaration_returnType_afterComment() async {
    // ClassDeclaration  CompilationUnit
    addSource('/home/test/lib/a.dart', '''
        int T1;
        F1() { }
        typedef D1();
        class C1 {C1(this.x) { } int x;}''');
    addTestSource('''
        import "a.dart";
        int T2;
        F2() { }
        typedef D2();
        class C2 { }
        /* */ ^ zoo(z) { } String name;''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('Object');
    assertNotSuggested('T1');
    assertNotSuggested('F1');
    assertNotSuggested('D1');
    assertNotSuggested('C1');
    assertNotSuggested('T2');
    assertNotSuggested('F2');
    assertNotSuggested('D2');
    assertNotSuggested('C2');
    assertNotSuggested('name');
  }

  Future<void> test_FunctionDeclaration_returnType_afterComment2() async {
    // FunctionDeclaration  ClassDeclaration  CompilationUnit
    addSource('/home/test/lib/a.dart', '''
        int T1;
        F1() { }
        typedef D1();
        class C1 {C1(this.x) { } int x;}''');
    addTestSource('''
        import "a.dart";
        int T2;
        F2() { }
        typedef D2();
        class C2 { }
        /** */ ^ zoo(z) { } String name;''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('Object');
    assertNotSuggested('T1');
    assertNotSuggested('F1');
    assertNotSuggested('D1');
    assertNotSuggested('C1');
    assertNotSuggested('T2');
    assertNotSuggested('F2');
    assertNotSuggested('D2');
    assertNotSuggested('C2');
    assertNotSuggested('name');
  }

  Future<void> test_FunctionDeclaration_returnType_afterComment3() async {
    // FunctionDeclaration  ClassDeclaration  CompilationUnit
    addSource('/home/test/lib/a.dart', '''
        int T1;
        F1() { }
        typedef D1();
        class C1 {C1(this.x) { } int x;}''');
    addTestSource('''
        import "a.dart";
        int T2;
        F2() { }
        typedef D2();
        /// some dartdoc
        class C2 { }
        ^ zoo(z) { } String name;''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('Object');
    assertNotSuggested('T1');
    assertNotSuggested('F1');
    assertNotSuggested('D1');
    assertNotSuggested('C1');
    assertNotSuggested('T2');
    assertNotSuggested('F2');
    assertNotSuggested('D2');
    assertNotSuggested('C2');
    assertNotSuggested('name');
  }

  Future<void> test_FunctionExpression_body_function() async {
    // Block  BlockFunctionBody  FunctionExpression
    addTestSource('''
        void bar() { }
        String foo(List args) {x.then((R b) {^}''');
    await computeSuggestions();

    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('foo');
    assertNotSuggested('bar');
    assertNotSuggested('args');
    assertNotSuggested('b');
    assertNotSuggested('Object');
  }

  Future<void> test_generic_field() async {
    addTestSource('''
class C<T> {
  T t;
}
void f(C<int> c) {
  c.^
}
''');
    await computeSuggestions();
    assertSuggestField('t', 'int');
  }

  Future<void> test_generic_getter() async {
    addTestSource('''
class C<T> {
  T get t => null;
}
void f(C<int> c) {
  c.^
}
''');
    await computeSuggestions();
    assertSuggestGetter('t', 'int');
  }

  Future<void> test_generic_method() async {
    addTestSource('''
class C<T> {
  T m(T t) {}
}
void f(C<int> c) {
  c.^
}
''');
    await computeSuggestions();
    var suggestion = assertSuggestMethod('m', 'C', 'int');
    expect(suggestion.parameterTypes![0], 'int');
    expect(suggestion.element!.returnType, 'int');
    expect(suggestion.element!.parameters, '(int t)');
  }

  Future<void> test_generic_setter() async {
    addTestSource('''
class C<T> {
  set t(T value) {}
}
void f(C<int> c) {
  c.^
}
''');
    await computeSuggestions();
    // TODO(paulberry): modify assertSuggestSetter so that we can pass 'int'
    // as a parmeter to it, and it will check the appropriate field in
    // the suggestion object.
    var suggestion = assertSuggestSetter('t');
    expect(suggestion.element!.parameters, '(int value)');
  }

  Future<void> test_genericTypeAlias_noFunctionType() async {
    addTestSource('''
typedef F=;
g(F.^
''');
    await computeSuggestions();
  }

  Future<void> test_IfStatement() async {
    // SimpleIdentifier  IfStatement
    addTestSource('''
        class A {var b; X _c; foo() {A a; if (true) ^}}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('b');
    assertNotSuggested('_c');
    assertNotSuggested('Object');
    assertNotSuggested('A');
    assertNotSuggested('==');
  }

  Future<void> test_IfStatement_condition() async {
    // SimpleIdentifier  IfStatement  Block  BlockFunctionBody
    addTestSource('''
        class A {int x; int y() => 0;}
        main(){var a; if (^)}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('a');
    assertNotSuggested('main');
    assertNotSuggested('A');
    assertNotSuggested('Object');
  }

  Future<void> test_IfStatement_empty() async {
    // SimpleIdentifier  IfStatement
    addTestSource('''
        class A {var b; X _c; foo() {A a; if (^) something}}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('b');
    assertNotSuggested('_c');
    assertNotSuggested('Object');
    assertNotSuggested('A');
    assertNotSuggested('==');
  }

  Future<void> test_IfStatement_invocation() async {
    // SimpleIdentifier  PrefixIdentifier  IfStatement
    addTestSource('''
        main() {var a; if (a.^) something}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertSuggestMethod('toString', 'Object', 'String');
    assertNotSuggested('Object');
    assertNotSuggested('A');
    assertNotSuggested('==');
  }

  Future<void> test_ImportDirective_dart() async {
    // SimpleStringLiteral  ImportDirective
    addTestSource('''
        import "dart^";
        main() {}''');
    await computeSuggestions();
    assertNoSuggestions();
  }

  Future<void> test_IndexExpression() async {
    // ExpressionStatement  Block
    addSource('/home/test/lib/a.dart', '''
        int T1;
        F1() { }
        class A {int x;}''');
    addTestSource('''
        import "a.dart";
        int T2;
        F2() { }
        class B {int x;}
        class C {foo(){var f; {var x;} f[^]}}''');
    await computeSuggestions();
    assertNotSuggested('x');
    assertNotSuggested('f');
    assertNotSuggested('foo');
    assertNotSuggested('C');
    assertNotSuggested('F2');
    assertNotSuggested('T2');
    assertNotSuggested('A');
    assertNotSuggested('F1');
    // TODO (danrubel) getter is being suggested instead of top level var
    //assertSuggestImportedTopLevelVar('T1', 'int');
  }

  Future<void> test_IndexExpression2() async {
    // SimpleIdentifier IndexExpression ExpressionStatement  Block
    addSource('/home/test/lib/a.dart', '''
        int T1;
        F1() { }
        class A {int x;}''');
    addTestSource('''
        import "a.dart";
        int T2;
        F2() { }
        class B {int x;}
        class C {foo(){var f; {var x;} f[T^]}}''');
    await computeSuggestions();
    // top level results are partially filtered based on first char
    assertNotSuggested('T2');
    // TODO (danrubel) getter is being suggested instead of top level var
    //assertSuggestImportedTopLevelVar('T1', 'int');
  }

  Future<void> test_InstanceCreationExpression_imported() async {
    // SimpleIdentifier  TypeName  ConstructorName  InstanceCreationExpression
    addSource('/home/test/lib/a.dart', '''
        int T1;
        F1() { }
        class A {A(this.x) { } int x;}''');
    addTestSource('''
        import "a.dart";
        import "dart:async";
        int T2;
        F2() { }
        class B {B(this.x, [String boo]) { } int x;}
        class C {foo(){var f; {var x;} new ^}}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('Object');
    assertNotSuggested('Future');
    assertNotSuggested('A');
    assertNotSuggested('B');
    assertNotSuggested('C');
    assertNotSuggested('f');
    assertNotSuggested('x');
    assertNotSuggested('foo');
    assertNotSuggested('F1');
    assertNotSuggested('F2');
    assertNotSuggested('T1');
    assertNotSuggested('T2');
  }

  Future<void> test_InstanceCreationExpression_unimported() async {
    // SimpleIdentifier  TypeName  ConstructorName  InstanceCreationExpression
    addSource('/testAB.dart', 'class Foo { }');
    addTestSource('class C {foo(){new F^}}');
    await computeSuggestions();
    expect(replacementOffset, completionOffset! - 1);
    expect(replacementLength, 1);
    assertNotSuggested('Future');
    assertNotSuggested('Foo');
  }

  Future<void> test_InterpolationExpression() async {
    // SimpleIdentifier  InterpolationExpression  StringInterpolation
    addSource('/home/test/lib/a.dart', '''
        int T1;
        F1() { }
        typedef D1();
        class C1 {C1(this.x) { } int x;}''');
    addTestSource('''
        import "a.dart";
        int T2;
        F2() { }
        typedef D2();
        class C2 { }
        main() {String name; print("hello \$^");}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('Object');
    // TODO(danrubel) should return top level var rather than getter
    assertNotSuggested('F1');
    assertNotSuggested('D1');
    assertNotSuggested('C1');
    assertNotSuggested('T2');
    assertNotSuggested('F2');
    assertNotSuggested('D2');
    assertNotSuggested('C2');
    assertNotSuggested('name');
  }

  Future<void> test_InterpolationExpression_block() async {
    // SimpleIdentifier  InterpolationExpression  StringInterpolation
    addSource('/home/test/lib/a.dart', '''
        int T1;
        F1() { }
        typedef D1();
        class C1 {C1(this.x) { } int x;}''');
    addTestSource('''
        import "a.dart";
        int T2;
        F2() { }
        typedef D2();
        class C2 { }
        main() {String name; print("hello \${^}");}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('Object');
    assertNotSuggested('F1');
    assertNotSuggested('D1');
    assertNotSuggested('C1');
    assertNotSuggested('T2');
    assertNotSuggested('F2');
    assertNotSuggested('D2');
    assertNotSuggested('C2');
    assertNotSuggested('name');
  }

  Future<void> test_InterpolationExpression_block2() async {
    // SimpleIdentifier  InterpolationExpression  StringInterpolation
    addTestSource('main() {String name; print("hello \${n^}");}');
    await computeSuggestions();
    assertNotSuggested('name');
    // top level results are partially filtered
    //assertNotSuggested('Object');
  }

  Future<void> test_InterpolationExpression_prefix_selector() async {
    // SimpleIdentifier  PrefixedIdentifier  InterpolationExpression
    addTestSource('main() {String name; print("hello \${name.^}");}');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertSuggestGetter('length', 'int');
    assertNotSuggested('name');
    assertNotSuggested('Object');
    assertNotSuggested('==');
  }

  Future<void> test_InterpolationExpression_prefix_selector2() async {
    // SimpleIdentifier  PrefixedIdentifier  InterpolationExpression
    addTestSource('main() {String name; print("hello \$name.^");}');
    await computeSuggestions();
    assertNoSuggestions();
  }

  Future<void> test_InterpolationExpression_prefix_target() async {
    // SimpleIdentifier  PrefixedIdentifier  InterpolationExpression
    addTestSource('main() {String name; print("hello \${nam^e.length}");}');
    await computeSuggestions();
    assertNotSuggested('name');
    // top level results are partially filtered
    //assertNotSuggested('Object');
    assertNotSuggested('length');
  }

  Future<void> test_IsExpression() async {
    // SimpleIdentifier  TypeName  IsExpression  IfStatement
    addSource('/home/test/lib/b.dart', '''
        lib B;
        foo() { }
        class X {X.c(); X._d(); z() {}}''');
    addTestSource('''
        import 'b.dart';
        class Y {Y.c(); Y._d(); z() {}}
        main() {var x; if (x is ^) { }}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('X');
    assertNotSuggested('Y');
    assertNotSuggested('x');
    assertNotSuggested('main');
    assertNotSuggested('foo');
  }

  Future<void> test_IsExpression_target() async {
    // IfStatement  Block  BlockFunctionBody
    addTestSource('''
        foo() { }
        void bar() { }
        class A {int x; int y() => 0;}
        main(){var a; if (^ is A)}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('a');
    assertNotSuggested('main');
    assertNotSuggested('foo');
    assertNotSuggested('bar');
    assertNotSuggested('A');
    assertNotSuggested('Object');
  }

  Future<void> test_IsExpression_type() async {
    // SimpleIdentifier  TypeName  IsExpression  IfStatement
    addTestSource('''
        class A {int x; int y() => 0;}
        main(){var a; if (a is ^)}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('a');
    assertNotSuggested('main');
    assertNotSuggested('A');
    assertNotSuggested('Object');
  }

  Future<void> test_IsExpression_type_partial() async {
    // SimpleIdentifier  TypeName  IsExpression  IfStatement
    addTestSource('''
        class A {int x; int y() => 0;}
        main(){var a; if (a is Obj^)}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset! - 3);
    expect(replacementLength, 3);
    assertNotSuggested('a');
    assertNotSuggested('main');
    assertNotSuggested('A');
    assertNotSuggested('Object');
  }

  Future<void> test_keyword() async {
    addTestSource('class C { static C get instance => null; } main() {C.in^}');
    await computeSuggestions();
    // Suggested by StaticMemberContributor
    assertNotSuggested('instance');
  }

  Future<void> test_keyword2() async {
    addSource('/home/test/lib/b.dart', '''
        lib B;
        int newT1;
        int T1;
        nowIsIt() { }
        class X {factory X.c(); factory X._d(); z() {}}''');
    addTestSource('''
        import 'b.dart';
        String newer() {}
        var m;
        main() {new^ X.c();}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset! - 3);
    expect(replacementLength, 3);
    assertNotSuggested('c');
    assertNotSuggested('_d');
    // Imported suggestion are filtered by 1st character
    assertNotSuggested('nowIsIt');
    assertNotSuggested('T1');
    assertNotSuggested('z');
    assertNotSuggested('m');
    assertNotSuggested('newer');
  }

  Future<void> test_libraryPrefix() async {
    // SimpleIdentifier  PrefixedIdentifier  ExpressionStatement
    addTestSource('import "dart:async" as bar; foo() {bar.^}');
    await computeSuggestions();
    // Suggested by LibraryMemberContributor
    assertNotSuggested('Future');
    assertNotSuggested('loadLibrary');
  }

  Future<void> test_libraryPrefix2() async {
    // SimpleIdentifier  MethodInvocation  ExpressionStatement
    addTestSource('import "dart:async" as bar; foo() {bar.^ print("f")}');
    await computeSuggestions();
    // Suggested by LibraryMemberContributor
    assertNotSuggested('Future');
  }

  Future<void> test_libraryPrefix3() async {
    // SimpleIdentifier  MethodInvocation  ExpressionStatement
    addTestSource('import "dart:async" as bar; foo() {new bar.F^ print("f")}');
    await computeSuggestions();
    // Suggested by LibraryMemberContributor
    assertNotSuggested('Future');
    assertNotSuggested('Future.delayed');
  }

  Future<void> test_libraryPrefix_deferred() async {
    // SimpleIdentifier  PrefixedIdentifier  ExpressionStatement
    addTestSource('import "dart:async" deferred as bar; foo() {bar.^}');
    await computeSuggestions();
    // Suggested by LibraryMemberContributor
    assertNotSuggested('Future');
    assertNotSuggested('loadLibrary');
  }

  Future<void> test_libraryPrefix_with_exports() async {
    addSource('/home/test/lib/a.dart', 'class A { }');
    addSource('/home/test/lib/b.dart', 'export "a.dart"; class B { }');
    addTestSource('import "b.dart" as foo; main() {foo.^} class C { }');
    await computeSuggestions();
    // Suggested by LibraryMemberContributor
    assertNotSuggested('B');
    assertNotSuggested('A');
  }

  Future<void> test_Literal_list() async {
    // ']'  ListLiteral  ArgumentList  MethodInvocation
    addTestSource('main() {var Some; print([^]);}');
    await computeSuggestions();
    assertNotSuggested('Some');
    assertNotSuggested('String');
  }

  Future<void> test_Literal_list2() async {
    // SimpleIdentifier ListLiteral  ArgumentList  MethodInvocation
    addTestSource('main() {var Some; print([S^]);}');
    await computeSuggestions();
    assertNotSuggested('Some');
    assertNotSuggested('String');
  }

  Future<void> test_Literal_string() async {
    // SimpleStringLiteral  ExpressionStatement  Block
    addTestSource('class A {a() {"hel^lo"}}');
    await computeSuggestions();
    assertNoSuggestions();
  }

  Future<void> test_local() async {
    addTestSource('foo() {String x = "bar"; x.^}');
    await computeSuggestions();
    assertSuggestGetter('length', 'int');
  }

  Future<void> test_local_is() async {
    addTestSource('foo() {var x; if (x is String) x.^}');
    await computeSuggestions();
    assertSuggestGetter('length', 'int');
  }

  Future<void> test_local_propogatedType() async {
    addTestSource('foo() {var x = "bar"; x.^}');
    await computeSuggestions();
    assertSuggestGetter('length', 'int');
  }

  Future<void> test_localVariableDeclarationName() async {
    addTestSource('main() {String m^}');
    await computeSuggestions();
    assertNotSuggested('main');
    assertNotSuggested('min');
  }

  Future<void> test_MapLiteralEntry() async {
    // MapLiteralEntry  MapLiteral  VariableDeclaration
    addSource('/home/test/lib/a.dart', '''
        int T1;
        F1() { }
        typedef D1();
        class C1 {C1(this.x) { } int x;}''');
    addTestSource('''
        import "a.dart";
        int T2;
        F2() { }
        typedef D2();
        class C2 { }
        foo = {^''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('Object');
    assertNotSuggested('F1');
    assertNotSuggested('D1');
    assertNotSuggested('C1');
    assertNotSuggested('T2');
    assertNotSuggested('F2');
    assertNotSuggested('D2');
    assertNotSuggested('C2');
  }

  Future<void> test_MapLiteralEntry1() async {
    // MapLiteralEntry  MapLiteral  VariableDeclaration
    addSource('/home/test/lib/a.dart', '''
        int T1;
        F1() { }
        typedef D1();
        class C1 {C1(this.x) { } int x;}''');
    addTestSource('''
        import "a.dart";
        int T2;
        F2() { }
        typedef D2();
        class C2 { }
        foo = {T^''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset! - 1);
    expect(replacementLength, 1);
    assertNotSuggested('T2');
  }

  Future<void> test_MapLiteralEntry2() async {
    // SimpleIdentifier  MapLiteralEntry  MapLiteral  VariableDeclaration
    addSource('/home/test/lib/a.dart', '''
        int T1;
        F1() { }
        typedef D1();
        class C1 {C1(this.x) { } int x;}''');
    addTestSource('''
        import "a.dart";
        int T2;
        F2() { }
        typedef D2();
        class C2 { }
        foo = {7:T^};''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset! - 1);
    expect(replacementLength, 1);
    assertNotSuggested('T2');
  }

  Future<void> test_method_parameters_mixed_required_and_named() async {
    addTestSource('''
class C {
  void m(x, {int y}) {}
}
void main() {new C().^}''');
    await computeSuggestions();
    var suggestion = assertSuggestMethod('m', 'C', 'void');
    expect(suggestion.parameterNames, hasLength(2));
    expect(suggestion.parameterNames![0], 'x');
    expect(suggestion.parameterTypes![0], 'dynamic');
    expect(suggestion.parameterNames![1], 'y');
    expect(suggestion.parameterTypes![1], 'int');
    expect(suggestion.requiredParameterCount, 1);
    expect(suggestion.hasNamedParameters, true);
  }

  Future<void> test_method_parameters_mixed_required_and_positional() async {
    addTestSource('''
class C {
  void m(x, [int y]) {}
}
void main() {new C().^}''');
    await computeSuggestions();
    var suggestion = assertSuggestMethod('m', 'C', 'void');
    expect(suggestion.parameterNames, hasLength(2));
    expect(suggestion.parameterNames![0], 'x');
    expect(suggestion.parameterTypes![0], 'dynamic');
    expect(suggestion.parameterNames![1], 'y');
    expect(suggestion.parameterTypes![1], 'int');
    expect(suggestion.requiredParameterCount, 1);
    expect(suggestion.hasNamedParameters, false);
  }

  Future<void> test_method_parameters_named() async {
    addTestSource('''
class C {
  void m({x, int y}) {}
}
void main() {new C().^}''');
    await computeSuggestions();
    var suggestion = assertSuggestMethod('m', 'C', 'void');
    expect(suggestion.parameterNames, hasLength(2));
    expect(suggestion.parameterNames![0], 'x');
    expect(suggestion.parameterTypes![0], 'dynamic');
    expect(suggestion.parameterNames![1], 'y');
    expect(suggestion.parameterTypes![1], 'int');
    expect(suggestion.requiredParameterCount, 0);
    expect(suggestion.hasNamedParameters, true);
  }

  Future<void> test_method_parameters_none() async {
    addTestSource('''
class C {
  void m() {}
}
void main() {new C().^}''');
    await computeSuggestions();
    var suggestion = assertSuggestMethod('m', 'C', 'void');
    expect(suggestion.parameterNames, isEmpty);
    expect(suggestion.parameterTypes, isEmpty);
    expect(suggestion.requiredParameterCount, 0);
    expect(suggestion.hasNamedParameters, false);
  }

  Future<void> test_method_parameters_positional() async {
    addTestSource('''
class C {
  void m([x, int y]) {}
}
void main() {new C().^}''');
    await computeSuggestions();
    var suggestion = assertSuggestMethod('m', 'C', 'void');
    expect(suggestion.parameterNames, hasLength(2));
    expect(suggestion.parameterNames![0], 'x');
    expect(suggestion.parameterTypes![0], 'dynamic');
    expect(suggestion.parameterNames![1], 'y');
    expect(suggestion.parameterTypes![1], 'int');
    expect(suggestion.requiredParameterCount, 0);
    expect(suggestion.hasNamedParameters, false);
  }

  Future<void> test_method_parameters_required() async {
    addTestSource('''
class C {
  void m(x, int y) {}
}
void main() {new C().^}''');
    await computeSuggestions();
    var suggestion = assertSuggestMethod('m', 'C', 'void');
    expect(suggestion.parameterNames, hasLength(2));
    expect(suggestion.parameterNames![0], 'x');
    expect(suggestion.parameterTypes![0], 'dynamic');
    expect(suggestion.parameterNames![1], 'y');
    expect(suggestion.parameterTypes![1], 'int');
    expect(suggestion.requiredParameterCount, 2);
    expect(suggestion.hasNamedParameters, false);
  }

  Future<void> test_MethodDeclaration_body_getters() async {
    // Block  BlockFunctionBody  MethodDeclaration
    addTestSource('class A {@deprecated X get f => 0; Z a() {^} get _g => 1;}');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('a');
    assertNotSuggested('f');
    assertNotSuggested('_g');
  }

  Future<void> test_MethodDeclaration_body_static() async {
    // Block  BlockFunctionBody  MethodDeclaration
    addSource('/testC.dart', '''
        class C {
          c1() {}
          var c2;
          static c3() {}
          static var c4;}''');
    addTestSource('''
        import "testC.dart";
        class B extends C {
          b1() {}
          var b2;
          static b3() {}
          static var b4;}
        class A extends B {
          a1() {}
          var a2;
          static a3() {}
          static var a4;
          static a() {^}}''');
    await computeSuggestions();
    assertNotSuggested('a1');
    assertNotSuggested('a2');
    assertNotSuggested('a3');
    assertNotSuggested('a4');
    assertNotSuggested('b1');
    assertNotSuggested('b2');
    assertNotSuggested('b3');
    assertNotSuggested('b4');
    assertNotSuggested('c1');
    assertNotSuggested('c2');
    assertNotSuggested('c3');
    assertNotSuggested('c4');
  }

  Future<void> test_MethodDeclaration_members() async {
    // Block  BlockFunctionBody  MethodDeclaration
    addTestSource('class A {@deprecated X f; Z _a() {^} var _g;}');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('_a');
    assertNotSuggested('f');
    assertNotSuggested('_g');
    assertNotSuggested('bool');
  }

  Future<void> test_MethodDeclaration_parameters_named() async {
    // Block  BlockFunctionBody  MethodDeclaration
    addTestSource('class A {@deprecated Z a(X x, _, b, {y: boo}) {^}}');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('a');
    assertNotSuggested('x');
    assertNotSuggested('y');
    assertNotSuggested('b');
    assertNotSuggested('int');
    assertNotSuggested('_');
  }

  Future<void> test_MethodDeclaration_parameters_positional() async {
    // Block  BlockFunctionBody  MethodDeclaration
    addTestSource('''
        foo() { }
        void bar() { }
        class A {Z a(X x, [int y=1]) {^}}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('foo');
    assertNotSuggested('bar');
    assertNotSuggested('a');
    assertNotSuggested('x');
    assertNotSuggested('y');
    assertNotSuggested('String');
  }

  Future<void> test_MethodDeclaration_returnType() async {
    // ClassDeclaration  CompilationUnit
    addSource('/home/test/lib/a.dart', '''
        int T1;
        F1() { }
        typedef D1();
        class C1 {C1(this.x) { } int x;}''');
    addTestSource('''
        import "a.dart";
        int T2;
        F2() { }
        typedef D2();
        class C2 {^ zoo(z) { } String name; }''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('Object');
    assertNotSuggested('T1');
    assertNotSuggested('F1');
    assertNotSuggested('D1');
    assertNotSuggested('C1');
    assertNotSuggested('T2');
    assertNotSuggested('F2');
    assertNotSuggested('D2');
    assertNotSuggested('C2');
    assertNotSuggested('name');
  }

  Future<void> test_MethodDeclaration_returnType_afterComment() async {
    // ClassDeclaration  CompilationUnit
    addSource('/home/test/lib/a.dart', '''
        int T1;
        F1() { }
        typedef D1();
        class C1 {C1(this.x) { } int x;}''');
    addTestSource('''
        import "a.dart";
        int T2;
        F2() { }
        typedef D2();
        class C2 {/* */ ^ zoo(z) { } String name; }''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('Object');
    assertNotSuggested('T1');
    assertNotSuggested('F1');
    assertNotSuggested('D1');
    assertNotSuggested('C1');
    assertNotSuggested('T2');
    assertNotSuggested('F2');
    assertNotSuggested('D2');
    assertNotSuggested('C2');
    assertNotSuggested('name');
  }

  Future<void> test_MethodDeclaration_returnType_afterComment2() async {
    // MethodDeclaration  ClassDeclaration  CompilationUnit
    addSource('/home/test/lib/a.dart', '''
        int T1;
        F1() { }
        typedef D1();
        class C1 {C1(this.x) { } int x;}''');
    addTestSource('''
        import "a.dart";
        int T2;
        F2() { }
        typedef D2();
        class C2 {/** */ ^ zoo(z) { } String name; }''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('Object');
    assertNotSuggested('T1');
    assertNotSuggested('F1');
    assertNotSuggested('D1');
    assertNotSuggested('C1');
    assertNotSuggested('T2');
    assertNotSuggested('F2');
    assertNotSuggested('D2');
    assertNotSuggested('C2');
    assertNotSuggested('name');
  }

  Future<void> test_MethodDeclaration_returnType_afterComment3() async {
    // MethodDeclaration  ClassDeclaration  CompilationUnit
    addSource('/home/test/lib/a.dart', '''
        int T1;
        F1() { }
        typedef D1();
        class C1 {C1(this.x) { } int x;}''');
    addTestSource('''
        import "a.dart";
        int T2;
        F2() { }
        typedef D2();
        class C2 {
          /// some dartdoc
          ^ zoo(z) { } String name; }''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('Object');
    assertNotSuggested('T1');
    assertNotSuggested('F1');
    assertNotSuggested('D1');
    assertNotSuggested('C1');
    assertNotSuggested('T2');
    assertNotSuggested('F2');
    assertNotSuggested('D2');
    assertNotSuggested('C2');
    assertNotSuggested('name');
  }

  Future<void> test_MethodInvocation_no_semicolon() async {
    // MethodInvocation  ExpressionStatement  Block
    addTestSource(r'''
        main() { }
        class I {X get f => new A();get _g => new A(); F $p; void $q(){}}
        class A implements I {
          var b; X _c;
          X get d => new A();get _e => new A();
          // no semicolon between completion point and next statement
          set s1(I x) {} set _s2(I x) {x.^ m(null);}
          m(X x) {} I _n(X x) {}}
        class X{}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertSuggestGetter('f', 'X');
    assertSuggestGetter('_g', null);
    assertSuggestField(r'$p', 'dynamic', relevance: DART_RELEVANCE_LOW);
    assertSuggestMethod(r'$q', 'I', 'void', relevance: DART_RELEVANCE_LOW);
    assertNotSuggested('b');
    assertNotSuggested('_c');
    assertNotSuggested('d');
    assertNotSuggested('_e');
    assertNotSuggested('s1');
    assertNotSuggested('_s2');
    assertNotSuggested('m');
    assertNotSuggested('_n');
    assertNotSuggested('a');
    assertNotSuggested('A');
    assertNotSuggested('X');
    assertNotSuggested('Object');
    assertNotSuggested('==');
  }

  Future<void> test_new_instance() async {
    addTestSource('import "dart:math"; class A {x() {new Random().^}}');
    await computeSuggestions();
    assertSuggestMethod('nextBool', 'Random', 'bool');
    assertSuggestMethod('nextDouble', 'Random', 'double');
    assertSuggestMethod('nextInt', 'Random', 'int');
    assertNotSuggested('Random');
    assertNotSuggested('Object');
    assertNotSuggested('A');
  }

  Future<void> test_no_parameters_field() async {
    addTestSource('''
class C {
  int x;
}
void main() {new C().^}''');
    await computeSuggestions();
    var suggestion = assertSuggestField('x', 'int');
    assertHasNoParameterInfo(suggestion);
  }

  Future<void> test_no_parameters_getter() async {
    addTestSource('''
class C {
  int get x => null;
}
void main() {int y = new C().^}''');
    await computeSuggestions();
    var suggestion = assertSuggestGetter('x', 'int');
    assertHasNoParameterInfo(suggestion);
  }

  Future<void> test_no_parameters_setter() async {
    addTestSource('''
class C {
  set x(int value) {};
}
void main() {int y = new C().^}''');
    await computeSuggestions();
    var suggestion = assertSuggestSetter('x');
    assertHasNoParameterInfo(suggestion);
  }

  Future<void> test_only_instance() async {
    // SimpleIdentifier  PropertyAccess  ExpressionStatement
    addTestSource('''
class C {
  int f1;
  static int f2;
  m1() {}
  static m2() {}
}
void main() {new C().^}''');
    await computeSuggestions();
    assertSuggestField('f1', 'int');
    assertNotSuggested('f2');
    assertSuggestMethod('m1', 'C', null);
    assertNotSuggested('m2');
  }

  Future<void> test_only_instance2() async {
    // SimpleIdentifier  MethodInvocation  ExpressionStatement
    addTestSource('''
class C {
  int f1;
  static int f2;
  m1() {}
  static m2() {}
}
void main() {new C().^ print("something");}''');
    await computeSuggestions();
    assertSuggestField('f1', 'int');
    assertNotSuggested('f2');
    assertSuggestMethod('m1', 'C', null);
    assertNotSuggested('m2');
  }

  Future<void> test_only_static() async {
    // SimpleIdentifier  PrefixedIdentifier  ExpressionStatement
    addTestSource('''
class C {
  int f1;
  static int f2;
  m1() {}
  static m2() {}
}
void main() {C.^}''');
    await computeSuggestions();
    assertNotSuggested('f1');
    // Suggested by StaticMemberContributor
    assertNotSuggested('f2');
    assertNotSuggested('m1');
    assertNotSuggested('m2');
  }

  Future<void> test_only_static2() async {
    // SimpleIdentifier  MethodInvocation  ExpressionStatement
    addTestSource('''
class C {
  int f1;
  static int f2;
  m1() {}
  static m2() {}
}
void main() {C.^ print("something");}''');
    await computeSuggestions();
    assertNotSuggested('f1');
    // Suggested by StaticMemberContributor
    assertNotSuggested('f2');
    assertNotSuggested('m1');
    assertNotSuggested('m2');
  }

  Future<void> test_param() async {
    addTestSource('foo(String x) {x.^}');
    await computeSuggestions();
    assertSuggestGetter('length', 'int');
  }

  Future<void> test_param_is() async {
    addTestSource('foo(x) {if (x is String) x.^}');
    await computeSuggestions();
    assertSuggestGetter('length', 'int');
  }

  Future<void> test_parameterName_excludeTypes() async {
    addTestSource('m(int ^) {}');
    await computeSuggestions();
    assertNotSuggested('int');
    assertNotSuggested('bool');
  }

  Future<void> test_partFile_TypeName() async {
    // SimpleIdentifier  TypeName  ConstructorName
    addSource('/home/test/lib/b.dart', '''
        lib B;
        int T1;
        F1() { }
        class X {X.c(); X._d(); z() {}}''');
    addSource('/home/test/lib/a.dart', '''
        library libA;
        import 'b.dart';
        part "$testFile";
        class A { }
        var m;''');
    addTestSource('''
        part of libA;
        class B { B.bar(int x); }
        main() {new ^}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('B.bar');
    assertNotSuggested('Object');
    assertNotSuggested('X.c');
    assertNotSuggested('X._d');
    assertNotSuggested('A');
    assertNotSuggested('F1');
    assertNotSuggested('T1');
    assertNotSuggested('_d');
    assertNotSuggested('z');
    assertNotSuggested('m');
  }

  Future<void> test_partFile_TypeName2() async {
    // SimpleIdentifier  TypeName  ConstructorName
    addSource('/home/test/lib/b.dart', '''
        lib B;
        int T1;
        F1() { }
        class X {X.c(); X._d(); z() {}}''');
    addSource('/home/test/lib/a.dart', '''
        part of libA;
        class B { }''');
    addTestSource('''
        library libA;
        import 'b.dart';
        part "a.dart";
        class A { A({String boo: 'hoo'}) { } }
        main() {new ^}
        var m;''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('A');
    assertNotSuggested('Object');
    assertNotSuggested('X.c');
    assertNotSuggested('X._d');
    assertNotSuggested('B');
    assertNotSuggested('F1');
    assertNotSuggested('T1');
    assertNotSuggested('_d');
    assertNotSuggested('z');
    assertNotSuggested('m');
  }

  Future<void> test_PrefixedIdentifier_class_const() async {
    // SimpleIdentifier PrefixedIdentifier ExpressionStatement Block
    addSource('/home/test/lib/b.dart', '''
        lib B;
        class I {
          static const scI = 'boo';
          X get f => new A();
          get _g => new A();}
        class B implements I {
          static const int scB = 12;
          var b; X _c;
          X get d => new A();get _e => new A();
          set s1(I x) {} set _s2(I x) {}
          m(X x) {} I _n(X x) {}}
        class X{}''');
    addTestSource('''
        import 'b.dart';
        class A extends B {
          static const String scA = 'foo';
          w() { }}
        main() {A.^}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    // Suggested by StaticMemberContributor
    assertNotSuggested('scA');
    assertNotSuggested('scB');
    assertNotSuggested('scI');
    assertNotSuggested('b');
    assertNotSuggested('_c');
    assertNotSuggested('d');
    assertNotSuggested('_e');
    assertNotSuggested('f');
    assertNotSuggested('_g');
    assertNotSuggested('s1');
    assertNotSuggested('_s2');
    assertNotSuggested('m');
    assertNotSuggested('_n');
    assertNotSuggested('a');
    assertNotSuggested('A');
    assertNotSuggested('X');
    assertNotSuggested('w');
    assertNotSuggested('Object');
    assertNotSuggested('==');
  }

  Future<void> test_PrefixedIdentifier_class_imported() async {
    // SimpleIdentifier  PrefixedIdentifier  ExpressionStatement
    addSource('/home/test/lib/b.dart', '''
        lib B;
        class I {X get f => new A();get _g => new A();}
        class A implements I {
          static const int sc = 12;
          @deprecated var b; X _c;
          X get d => new A();get _e => new A();
          set s1(I x) {} set _s2(I x) {}
          m(X x) {} I _n(X x) {}}
        class X{}''');
    addTestSource('''
        import 'b.dart';
        main() {A a; a.^}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('sc');
    assertSuggestField('b', null, isDeprecated: true);
    assertNotSuggested('_c');
    assertSuggestGetter('d', 'X');
    assertNotSuggested('_e');
    assertSuggestGetter('f', 'X');
    assertNotSuggested('_g');
    assertSuggestSetter('s1');
    assertNotSuggested('_s2');
    assertSuggestMethod('m', 'A', null);
    assertNotSuggested('_n');
    assertNotSuggested('a');
    assertNotSuggested('A');
    assertNotSuggested('X');
    assertNotSuggested('Object');
    assertNotSuggested('==');
  }

  Future<void> test_PrefixedIdentifier_class_local() async {
    // SimpleIdentifier  PrefixedIdentifier  ExpressionStatement
    addTestSource('''
        main() {A a; a.^}
        class I {X get f => new A();get _g => new A();}
        class A implements I {
          static const int sc = 12;
          var b; X _c;
          X get d => new A();get _e => new A();
          set s1(I x) {} set _s2(I x) {}
          m(X x) {} I _n(X x) {}}
        class X{}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('sc');
    assertSuggestField('b', null);
    assertSuggestField('_c', 'X');
    assertSuggestGetter('d', 'X');
    assertSuggestGetter('_e', null);
    assertSuggestGetter('f', 'X');
    assertSuggestGetter('_g', null);
    assertSuggestSetter('s1');
    assertSuggestSetter('_s2');
    assertSuggestMethod('m', 'A', null);
    assertSuggestMethod('_n', 'A', 'I');
    assertNotSuggested('a');
    assertNotSuggested('A');
    assertNotSuggested('X');
    assertNotSuggested('Object');
    assertNotSuggested('==');
  }

  Future<void> test_PrefixedIdentifier_getter() async {
    // SimpleIdentifier  PrefixedIdentifier  ExpressionStatement
    addTestSource('String get g => "one"; f() {g.^}');
    await computeSuggestions();
    assertSuggestGetter('length', 'int');
  }

  Future<void> test_PrefixedIdentifier_library() async {
    // SimpleIdentifier  PrefixedIdentifier  ExpressionStatement
    addSource('/home/test/lib/b.dart', '''
        lib B;
        var T1;
        class X { }
        class Y { }''');
    addTestSource('''
        import 'b.dart'; as b;
        var T2;
        class A { }
        main() {b.^}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    // Suggested by LibraryMemberContributor
    assertNotSuggested('X');
    assertNotSuggested('Y');
    assertNotSuggested('T1');
    assertNotSuggested('T2');
    assertNotSuggested('Object');
    assertNotSuggested('b');
    assertNotSuggested('A');
    assertNotSuggested('==');
  }

  Future<void> test_PrefixedIdentifier_library_typesOnly() async {
    // SimpleIdentifier  PrefixedIdentifier  TypeName
    addSource('/home/test/lib/b.dart', '''
        lib B;
        var T1;
        class X { }
        class Y { }''');
    addTestSource('''
        import 'b.dart'; as b;
        var T2;
        class A { }
        foo(b.^ f) {}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    // Suggested by LibraryMemberContributor
    assertNotSuggested('X');
    assertNotSuggested('Y');
    assertNotSuggested('T1');
    assertNotSuggested('T2');
    assertNotSuggested('Object');
    assertNotSuggested('b');
    assertNotSuggested('A');
    assertNotSuggested('==');
  }

  Future<void> test_PrefixedIdentifier_library_typesOnly2() async {
    // SimpleIdentifier  PrefixedIdentifier  TypeName
    addSource('/home/test/lib/b.dart', '''
        lib B;
        var T1;
        class X { }
        class Y { }''');
    addTestSource('''
        import 'b.dart'; as b;
        var T2;
        class A { }
        foo(b.^) {}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    // Suggested by LibraryMemberContributor
    assertNotSuggested('X');
    assertNotSuggested('Y');
    assertNotSuggested('T1');
    assertNotSuggested('T2');
    assertNotSuggested('Object');
    assertNotSuggested('b');
    assertNotSuggested('A');
    assertNotSuggested('==');
  }

  Future<void> test_PrefixedIdentifier_parameter() async {
    // SimpleIdentifier  PrefixedIdentifier  ExpressionStatement
    addSource('/home/test/lib/b.dart', '''
        lib B;
        class _W {M y; var _z;}
        class X extends _W {}
        class M{}''');
    addTestSource('''
        import 'b.dart';
        foo(X x) {x.^}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertSuggestField('y', 'M');
    assertNotSuggested('_z');
    assertNotSuggested('==');
  }

  Future<void> test_PrefixedIdentifier_prefix() async {
    // SimpleIdentifier  PrefixedIdentifier  ExpressionStatement
    addSource('/home/test/lib/a.dart', '''
        class A {static int bar = 10;}
        _B() {}''');
    addTestSource('''
        import "a.dart";
        class X {foo(){A^.bar}}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset! - 1);
    expect(replacementLength, 1);
    assertNotSuggested('A');
    assertNotSuggested('X');
    assertNotSuggested('foo');
    assertNotSuggested('bar');
    assertNotSuggested('_B');
  }

  Future<void> test_PrefixedIdentifier_propertyAccess() async {
    // PrefixedIdentifier  ExpressionStatement  Block  BlockFunctionBody
    addTestSource('class A {String x; int get foo {x.^}');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertSuggestGetter('isEmpty', 'bool');
    assertSuggestMethod('compareTo', 'Comparable', 'int');
  }

  Future<void> test_PrefixedIdentifier_propertyAccess_newStmt() async {
    // PrefixedIdentifier  ExpressionStatement  Block  BlockFunctionBody
    addTestSource('class A {String x; int get foo {x.^ int y = 0;}');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertSuggestGetter('isEmpty', 'bool');
    assertSuggestMethod('compareTo', 'Comparable', 'int');
  }

  Future<void> test_PrefixedIdentifier_trailingStmt_const() async {
    // SimpleIdentifier  PrefixedIdentifier  ExpressionStatement
    addTestSource('const String g = "hello"; f() {g.^ int y = 0;}');
    await computeSuggestions();
    assertSuggestGetter('length', 'int');
  }

  Future<void> test_PrefixedIdentifier_trailingStmt_const_untyped() async {
    // SimpleIdentifier  PrefixedIdentifier  ExpressionStatement
    addTestSource('const g = "hello"; f() {g.^ int y = 0;}');
    await computeSuggestions();
    assertSuggestMethod('toString', 'Object', 'String');
    assertSuggestGetter('length', 'int');
  }

  Future<void> test_PrefixedIdentifier_trailingStmt_field() async {
    // SimpleIdentifier  PrefixedIdentifier  ExpressionStatement
    addTestSource('class A {String g; f() {g.^ int y = 0;}}');
    await computeSuggestions();
    assertSuggestGetter('length', 'int');
  }

  Future<void> test_PrefixedIdentifier_trailingStmt_function() async {
    // SimpleIdentifier  PrefixedIdentifier  ExpressionStatement
    addTestSource('String g() => "one"; f() {g.^ int y = 0;}');
    await computeSuggestions();
    assertSuggestGetter('length', 'int');
  }

  Future<void> test_PrefixedIdentifier_trailingStmt_functionTypeAlias() async {
    // SimpleIdentifier  PrefixedIdentifier  ExpressionStatement
    addTestSource('typedef String g(); f() {g.^ int y = 0;}');
    await computeSuggestions();
    assertSuggestGetter('length', 'int');
  }

  Future<void> test_PrefixedIdentifier_trailingStmt_getter() async {
    // SimpleIdentifier  PrefixedIdentifier  ExpressionStatement
    addTestSource('String get g => "one"; f() {g.^ int y = 0;}');
    await computeSuggestions();
    assertSuggestGetter('length', 'int');
  }

  Future<void> test_PrefixedIdentifier_trailingStmt_local_typed() async {
    // SimpleIdentifier  PrefixedIdentifier  ExpressionStatement
    addTestSource('f() {String g; g.^ int y = 0;}');
    await computeSuggestions();
    assertSuggestGetter('length', 'int');
  }

  Future<void> test_PrefixedIdentifier_trailingStmt_local_untyped() async {
    // SimpleIdentifier  PrefixedIdentifier  ExpressionStatement
    addTestSource('f() {var g = "hello"; g.^ int y = 0;}');
    await computeSuggestions();
    assertSuggestGetter('length', 'int');
  }

  Future<void> test_PrefixedIdentifier_trailingStmt_method() async {
    // SimpleIdentifier  PrefixedIdentifier  ExpressionStatement
    addTestSource('class A {String g() {}; f() {g.^ int y = 0;}}');
    await computeSuggestions();
    assertSuggestGetter('length', 'int');
  }

  Future<void> test_PrefixedIdentifier_trailingStmt_param() async {
    // SimpleIdentifier  PrefixedIdentifier  ExpressionStatement
    addTestSource('class A {f(String g) {g.^ int y = 0;}}');
    await computeSuggestions();
    assertSuggestGetter('length', 'int');
  }

  Future<void> test_PrefixedIdentifier_trailingStmt_param2() async {
    // SimpleIdentifier  PrefixedIdentifier  ExpressionStatement
    addTestSource('f(String g) {g.^ int y = 0;}');
    await computeSuggestions();
    assertSuggestGetter('length', 'int');
  }

  Future<void> test_PrefixedIdentifier_trailingStmt_topLevelVar() async {
    // SimpleIdentifier  PrefixedIdentifier  ExpressionStatement
    addTestSource('String g; f() {g.^ int y = 0;}');
    await computeSuggestions();
    assertSuggestGetter('length', 'int');
  }

  Future<void> test_PropertyAccess_expression() async {
    // SimpleIdentifier  MethodInvocation  PropertyAccess  ExpressionStatement
    addTestSource('class A {a() {"hello".to^String().length}}');
    await computeSuggestions();
    expect(replacementOffset, completionOffset! - 2);
    expect(replacementLength, 8);
    assertSuggestGetter('length', 'int');
    assertNotSuggested('A');
    assertNotSuggested('a');
    assertNotSuggested('Object');
    assertNotSuggested('==');
  }

  Future<void> test_PropertyAccess_noTarget() async {
    // SimpleIdentifier  PropertyAccess  ExpressionStatement
    addSource('/testAB.dart', 'class Foo { }');
    addTestSource('class C {foo(){.^}}');
    await computeSuggestions();
    assertNoSuggestions();
  }

  Future<void> test_PropertyAccess_noTarget2() async {
    // SimpleIdentifier  PropertyAccess  ExpressionStatement
    addSource('/testAB.dart', 'class Foo { }');
    addTestSource('main() {.^}');
    await computeSuggestions();
    assertNoSuggestions();
  }

  Future<void> test_PropertyAccess_selector() async {
    // SimpleIdentifier  PropertyAccess  ExpressionStatement  Block
    addTestSource('class A {a() {"hello".length.^}}');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertSuggestGetter('isEven', 'bool');
    assertNotSuggested('A');
    assertNotSuggested('a');
    assertNotSuggested('Object');
    assertNotSuggested('==');
  }

  Future<void> test_shadowing_field_over_field() =>
      check_shadowing('int x;', 'int x;', true);

  Future<void> test_shadowing_field_over_getter() =>
      check_shadowing('int x;', 'int get x => null;', true);

  Future<void> test_shadowing_field_over_method() =>
      check_shadowing('int x;', 'void x() {}', true);

  Future<void> test_shadowing_field_over_setter() =>
      check_shadowing('int x;', 'set x(int value) {}', true);

  Future<void> test_shadowing_getter_over_field() =>
      check_shadowing('int get x => null;', 'int x;', false);

  Future<void> test_shadowing_getter_over_getter() =>
      check_shadowing('int get x => null;', 'int get x => null;', true);

  Future<void> test_shadowing_getter_over_method() =>
      check_shadowing('int get x => null;', 'void x() {}', true);

  Future<void> test_shadowing_getter_over_setter() =>
      check_shadowing('int get x => null;', 'set x(int value) {}', false);

  Future<void> test_shadowing_method_over_field() =>
      check_shadowing('void x() {}', 'int x;', true);

  Future<void> test_shadowing_method_over_getter() =>
      check_shadowing('void x() {}', 'int get x => null;', true);

  Future<void> test_shadowing_method_over_method() =>
      check_shadowing('void x() {}', 'void x() {}', true);

  Future<void> test_shadowing_method_over_setter() =>
      check_shadowing('void x() {}', 'set x(int value) {}', true);

  Future<void> test_shadowing_mixin_order() async {
    addTestSource('''
class Base {
}
class Mixin1 {
  void f() {}
}
class Mixin2 {
  void f() {}
}
class Derived extends Base with Mixin1, Mixin2 {
}
void test(Derived d) {
  d.^
}
''');
    await computeSuggestions();
    // Note: due to dartbug.com/22069, analyzer currently analyzes mixins in
    // reverse order. The correct order is that Derived inherits from
    // "Base with Mixin1, Mixin2", which inherits from "Base with Mixin1",
    // which inherits from "Base". So the definition of f in Mixin2 should
    // shadow the definition in Mixin1.
    assertSuggestMethod('f', 'Mixin2', 'void');
  }

  Future<void> test_shadowing_mixin_over_superclass() async {
    addTestSource('''
class Base {
  void f() {}
}
class Mixin {
  void f() {}
}
class Derived extends Base with Mixin {
}
void test(Derived d) {
  d.^
}
''');
    await computeSuggestions();
    assertSuggestMethod('f', 'Mixin', 'void');
  }

  Future<void> test_shadowing_setter_over_field() =>
      check_shadowing('set x(int value) {}', 'int x;', false);

  Future<void> test_shadowing_setter_over_getter() =>
      check_shadowing('set x(int value) {}', 'int get x => null;', false);

  Future<void> test_shadowing_setter_over_method() =>
      check_shadowing('set x(int value) {}', 'void x() {}', true);

  Future<void> test_shadowing_setter_over_setter() =>
      check_shadowing('set x(int value) {}', 'set x(int value) {}', true);

  Future<void> test_shadowing_superclass_over_interface() async {
    addTestSource('''
class Base {
  void f() {}
}
class Interface {
  void f() {}
}
class Derived extends Base implements Interface {
}
void test(Derived d) {
  d.^
}
''');
    await computeSuggestions();
    assertSuggestMethod('f', 'Base', 'void');
  }

  Future<void> test_super() async {
    // SimpleIdentifier  MethodInvocation  ExpressionStatement
    addTestSource('''
class C3 {
  int fi3;
  static int fs3;
  m() {}
  mi3() {}
  static ms3() {}
}
class C2 {
  int fi2;
  static int fs2;
  m() {}
  mi2() {}
  static ms2() {}
}
class C1 extends C2 implements C3 {
  int fi1;
  static int fs1;
  m() {super.^}
  mi1() {}
  static ms1() {}
}''');
    await computeSuggestions();
    assertNotSuggested('fi1');
    assertNotSuggested('fs1');
    assertNotSuggested('mi1');
    assertNotSuggested('ms1');
    assertSuggestField('fi2', 'int');
    assertNotSuggested('fs2');
    assertSuggestMethod('mi2', 'C2', null);
    assertNotSuggested('ms2');
    assertSuggestMethod('m', 'C2', null, relevance: DART_RELEVANCE_HIGH);
    assertNotSuggested('fi3');
    assertNotSuggested('fs3');
    assertNotSuggested('mi3');
    assertNotSuggested('ms3');
  }

  Future<void> test_SwitchStatement_c() async {
    // SwitchStatement  Block  BlockFunctionBody  MethodDeclaration
    addTestSource('class A {String g(int x) {switch(x) {c^}}}');
    await computeSuggestions();
    assertNoSuggestions();
  }

  Future<void> test_SwitchStatement_case() async {
    // SwitchStatement  Block  BlockFunctionBody  MethodDeclaration
    addTestSource('class A {String g(int x) {var t; switch(x) {case 0: ^}}}');
    await computeSuggestions();
    assertNotSuggested('A');
    assertNotSuggested('g');
    assertNotSuggested('t');
    assertNotSuggested('String');
  }

  Future<void> test_SwitchStatement_empty() async {
    // SwitchStatement  Block  BlockFunctionBody  MethodDeclaration
    addTestSource('class A {String g(int x) {switch(x) {^}}}');
    await computeSuggestions();
    assertNoSuggestions();
  }

  Future<void> test_ThisExpression_block() async {
    // MethodInvocation  ExpressionStatement  Block
    addTestSource('''
        main() { }
        class I {X get f => new A();get _g => new A();}
        class A implements I {
          A() {}
          A.z() {}
          var b; X _c;
          X get d => new A();get _e => new A();
          // no semicolon between completion point and next statement
          set s1(I x) {} set _s2(I x) {this.^ m(null);}
          m(X x) {} I _n(X x) {}}
        class X{}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertSuggestField('b', null);
    assertSuggestField('_c', 'X');
    assertSuggestGetter('d', 'X');
    assertSuggestGetter('_e', null);
    assertSuggestGetter('f', 'X');
    assertSuggestGetter('_g', null);
    assertSuggestMethod('m', 'A', null);
    assertSuggestMethod('_n', 'A', 'I');
    assertSuggestSetter('s1');
    assertSuggestSetter('_s2');
    assertNotSuggested('z');
    assertNotSuggested('I');
    assertNotSuggested('A');
    assertNotSuggested('X');
    assertNotSuggested('Object');
    assertNotSuggested('==');
  }

  Future<void> test_ThisExpression_constructor() async {
    // MethodInvocation  ExpressionStatement  Block
    addTestSource('''
        main() { }
        class I {X get f => new A();get _g => new A();}
        class A implements I {
          A() {this.^}
          A.z() {}
          var b; X _c;
          X get d => new A();get _e => new A();
          // no semicolon between completion point and next statement
          set s1(I x) {} set _s2(I x) {m(null);}
          m(X x) {} I _n(X x) {}}
        class X{}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertSuggestField('b', null);
    assertSuggestField('_c', 'X');
    assertSuggestGetter('d', 'X');
    assertSuggestGetter('_e', null);
    assertSuggestGetter('f', 'X');
    assertSuggestGetter('_g', null);
    assertSuggestMethod('m', 'A', null);
    assertSuggestMethod('_n', 'A', 'I');
    assertSuggestSetter('s1');
    assertSuggestSetter('_s2');
    assertNotSuggested('z');
    assertNotSuggested('I');
    assertNotSuggested('A');
    assertNotSuggested('X');
    assertNotSuggested('Object');
    assertNotSuggested('==');
  }

  Future<void> test_ThisExpression_constructor_param() async {
    // SimpleIdentifier  FieldFormalParameter  FormalParameterList
    addTestSource('''
        main() { }
        class I {X get f => new A();get _g => new A();}
        class A implements I {
          A(this.^) {}
          A.z() {}
          var b; X _c; static sb;
          X get d => new A();get _e => new A();
          // no semicolon between completion point and next statement
          set s1(I x) {} set _s2(I x) {m(null);}
          m(X x) {} I _n(X x) {}}
        class X{}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    // Contributed by FieldFormalConstructorContributor
    assertNotSuggested('b');
    assertNotSuggested('_c');
    assertNotSuggested('sb');
    assertNotSuggested('d');
    assertNotSuggested('_e');
    assertNotSuggested('f');
    assertNotSuggested('_g');
    assertNotSuggested('m');
    assertNotSuggested('_n');
    assertNotSuggested('s1');
    assertNotSuggested('_s2');
    assertNotSuggested('z');
    assertNotSuggested('I');
    assertNotSuggested('A');
    assertNotSuggested('X');
    assertNotSuggested('Object');
    assertNotSuggested('==');
  }

  Future<void> test_ThisExpression_constructor_param2() async {
    // SimpleIdentifier  FieldFormalParameter  FormalParameterList
    addTestSource('''
        main() { }
        class I {X get f => new A();get _g => new A();}
        class A implements I {
          A(this.b^) {}
          A.z() {}
          var b; X _c;
          X get d => new A();get _e => new A();
          // no semicolon between completion point and next statement
          set s1(I x) {} set _s2(I x) {m(null);}
          m(X x) {} I _n(X x) {}}
        class X{}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset! - 1);
    expect(replacementLength, 1);
    // Contributed by FieldFormalConstructorContributor
    assertNotSuggested('b');
    assertNotSuggested('_c');
    assertNotSuggested('d');
    assertNotSuggested('_e');
    assertNotSuggested('f');
    assertNotSuggested('_g');
    assertNotSuggested('m');
    assertNotSuggested('_n');
    assertNotSuggested('s1');
    assertNotSuggested('_s2');
    assertNotSuggested('z');
    assertNotSuggested('I');
    assertNotSuggested('A');
    assertNotSuggested('X');
    assertNotSuggested('Object');
    assertNotSuggested('==');
  }

  Future<void> test_ThisExpression_constructor_param3() async {
    // SimpleIdentifier  FieldFormalParameter  FormalParameterList
    addTestSource('''
        main() { }
        class I {X get f => new A();get _g => new A();}
        class A implements I {
          A(this.^b) {}
          A.z() {}
          var b; X _c;
          X get d => new A();get _e => new A();
          // no semicolon between completion point and next statement
          set s1(I x) {} set _s2(I x) {m(null);}
          m(X x) {} I _n(X x) {}}
        class X{}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 1);
    // Contributed by FieldFormalConstructorContributor
    assertNotSuggested('b');
    assertNotSuggested('_c');
    assertNotSuggested('d');
    assertNotSuggested('_e');
    assertNotSuggested('f');
    assertNotSuggested('_g');
    assertNotSuggested('m');
    assertNotSuggested('_n');
    assertNotSuggested('s1');
    assertNotSuggested('_s2');
    assertNotSuggested('z');
    assertNotSuggested('I');
    assertNotSuggested('A');
    assertNotSuggested('X');
    assertNotSuggested('Object');
    assertNotSuggested('==');
  }

  Future<void> test_ThisExpression_constructor_param4() async {
    // SimpleIdentifier  FieldFormalParameter  FormalParameterList
    addTestSource('''
        main() { }
        class I {X get f => new A();get _g => new A();}
        class A implements I {
          A(this.b, this.^) {}
          A.z() {}
          var b; X _c;
          X get d => new A();get _e => new A();
          // no semicolon between completion point and next statement
          set s1(I x) {} set _s2(I x) {m(null);}
          m(X x) {} I _n(X x) {}}
        class X{}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('b');
    // Contributed by FieldFormalConstructorContributor
    assertNotSuggested('_c');
    assertNotSuggested('d');
    assertNotSuggested('_e');
    assertNotSuggested('f');
    assertNotSuggested('_g');
    assertNotSuggested('m');
    assertNotSuggested('_n');
    assertNotSuggested('s1');
    assertNotSuggested('_s2');
    assertNotSuggested('z');
    assertNotSuggested('I');
    assertNotSuggested('A');
    assertNotSuggested('X');
    assertNotSuggested('Object');
    assertNotSuggested('==');
  }

  Future<void> test_TopLevelVariableDeclaration_typed_name() async {
    // SimpleIdentifier  VariableDeclaration  VariableDeclarationList
    // TopLevelVariableDeclaration
    addTestSource('class A {} B ^');
    await computeSuggestions();
    assertNoSuggestions();
  }

  Future<void> test_TopLevelVariableDeclaration_untyped_name() async {
    // SimpleIdentifier  VariableDeclaration  VariableDeclarationList
    // TopLevelVariableDeclaration
    addTestSource('class A {} var ^');
    await computeSuggestions();
    assertNoSuggestions();
  }

  Future<void> test_TypeArgumentList() async {
    // SimpleIdentifier  BinaryExpression  ExpressionStatement
    addSource('/home/test/lib/a.dart', '''
        class C1 {int x;}
        F1() => 0;
        typedef String T1(int blat);''');
    addTestSource('''
        import "a.dart";'
        class C2 {int x;}
        F2() => 0;
        typedef int T2(int blat);
        class C<E> {}
        main() { C<^> c; }''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('Object');
    assertNotSuggested('C1');
    assertNotSuggested('T1');
    assertNotSuggested('C2');
    assertNotSuggested('T2');
    assertNotSuggested('F1');
    assertNotSuggested('F2');
  }

  Future<void> test_TypeArgumentList2() async {
    // TypeName  TypeArgumentList  TypeName
    addSource('/home/test/lib/a.dart', '''
        class C1 {int x;}
        F1() => 0;
        typedef String T1(int blat);''');
    addTestSource('''
        import "a.dart";'
        class C2 {int x;}
        F2() => 0;
        typedef int T2(int blat);
        class C<E> {}
        main() { C<C^> c; }''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset! - 1);
    expect(replacementLength, 1);
    assertNotSuggested('C1');
    assertNotSuggested('C2');
  }

  Future<void> test_VariableDeclaration_name() async {
    // SimpleIdentifier  VariableDeclaration  VariableDeclarationList
    // VariableDeclarationStatement  Block
    addSource('/home/test/lib/b.dart', '''
        lib B;
        foo() { }
        class _B { }
        class X {X.c(); X._d(); z() {}}''');
    addTestSource('''
        import 'b.dart';
        class Y {Y.c(); Y._d(); z() {}}
        main() {var ^}''');
    await computeSuggestions();
    assertNoSuggestions();
  }

  Future<void> test_VariableDeclarationList_final() async {
    // VariableDeclarationList  VariableDeclarationStatement  Block
    addTestSource('main() {final ^} class C { }');
    await computeSuggestions();
    assertNotSuggested('Object');
    assertNotSuggested('C');
    assertNotSuggested('==');
  }

  Future<void> test_VariableDeclarationStatement_RHS() async {
    // SimpleIdentifier  VariableDeclaration  VariableDeclarationList
    // VariableDeclarationStatement
    addSource('/home/test/lib/b.dart', '''
        lib B;
        foo() { }
        class _B { }
        class X {X.c(); X._d(); z() {}}''');
    addTestSource('''
        import 'b.dart';
        class Y {Y.c(); Y._d(); z() {}}
        class C {bar(){var f; {var x;} var e = ^}}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('X');
    assertNotSuggested('_B');
    assertNotSuggested('Y');
    assertNotSuggested('C');
    assertNotSuggested('f');
    assertNotSuggested('x');
    assertNotSuggested('e');
  }

  Future<void> test_VariableDeclarationStatement_RHS_missing_semicolon() async {
    // VariableDeclaration  VariableDeclarationList
    // VariableDeclarationStatement
    addSource('/home/test/lib/b.dart', '''
        lib B;
        foo1() { }
        void bar1() { }
        class _B { }
        class X {X.c(); X._d(); z() {}}''');
    addTestSource('''
        import 'b.dart';
        foo2() { }
        void bar2() { }
        class Y {Y.c(); Y._d(); z() {}}
        class C {bar(){var f; {var x;} var e = ^ var g}}''');
    await computeSuggestions();
    expect(replacementOffset, completionOffset);
    expect(replacementLength, 0);
    assertNotSuggested('X');
    assertNotSuggested('foo1');
    assertNotSuggested('bar1');
    assertNotSuggested('foo2');
    assertNotSuggested('bar2');
    assertNotSuggested('_B');
    assertNotSuggested('Y');
    assertNotSuggested('C');
    assertNotSuggested('f');
    assertNotSuggested('x');
    assertNotSuggested('e');
  }
}