pkg/analyzer/test/generated/parser_test.dart

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

library analyzer.test.generated.parser_test;

import 'package:analyzer/dart/ast/ast.dart';
import 'package:analyzer/dart/ast/standard_ast_factory.dart';
import 'package:analyzer/dart/ast/token.dart';
import 'package:analyzer/dart/ast/visitor.dart';
import 'package:analyzer/error/error.dart';
import 'package:analyzer/error/listener.dart';
import 'package:analyzer/src/dart/ast/token.dart';
import 'package:analyzer/src/dart/scanner/reader.dart';
import 'package:analyzer/src/dart/scanner/scanner.dart';
import 'package:analyzer/src/generated/parser.dart';
import 'package:analyzer/src/generated/source.dart';
import 'package:analyzer/src/generated/testing/token_factory.dart';
import 'package:analyzer/src/generated/utilities_dart.dart';
import 'package:test/test.dart';
import 'package:test_reflective_loader/test_reflective_loader.dart';

import 'test_support.dart';

main() {
  defineReflectiveSuite(() {
    defineReflectiveTests(ClassMemberParserTest);
    defineReflectiveTests(ComplexParserTest);
    defineReflectiveTests(ErrorParserTest);
    defineReflectiveTests(ExpressionParserTest);
    defineReflectiveTests(FormalParameterParserTest);
    defineReflectiveTests(NonErrorParserTest);
    defineReflectiveTests(RecoveryParserTest);
    defineReflectiveTests(SimpleParserTest);
    defineReflectiveTests(StatementParserTest);
    defineReflectiveTests(TopLevelParserTest);
  });
}

/**
 * Abstract base class for parser tests, which does not make assumptions about
 * which parser is used.
 */
abstract class AbstractParserTestCase implements ParserTestHelpers {
  void set enableAssertInitializer(bool value);

  void set enableGenericMethodComments(bool value);

  void set enableLazyAssignmentOperators(bool value);

  void set enableNnbd(bool value);

  /**
   * Set a flag indicating whether the parser is to parse part-of directives
   * that specify a URI rather than a library name.
   */
  void set enableUriInPartOf(bool value);

  /**
   * Get the parser used by the test.
   *
   * Caller must first invoke [createParser].
   */
  Parser get parser;

  /**
   * Assert that the number and codes of errors occurred during parsing is the
   * same the the [expectedErrorCodes].
   */
  void assertErrorsWithCodes(List<ErrorCode> expectedErrorCodes);

  /**
   * Asserts that no errors occurred during parsing.
   */
  void assertNoErrors();

  /**
   * Prepares to parse using tokens scanned from the given [content] string.
   */
  void createParser(String content);

  Expression parseAdditiveExpression(String code);

  Expression parseAssignableExpression(String code, bool primaryAllowed);

  Expression parseAssignableSelector(String code, bool optional,
      {bool allowConditional: true});

  AwaitExpression parseAwaitExpression(String code);

  Expression parseBitwiseAndExpression(String code);

  Expression parseBitwiseOrExpression(String code);

  Expression parseBitwiseXorExpression(String code);

  Expression parseCascadeSection(String code);

  CompilationUnit parseCompilationUnit(String source,
      [List<ErrorCode> errorCodes = const <ErrorCode>[]]);

  /// TODO(paulberry): merge with [parseCompilationUnit]
  CompilationUnit parseCompilationUnitWithOptions(String source,
      [List<ErrorCode> errorCodes = const <ErrorCode>[]]);

  ConditionalExpression parseConditionalExpression(String code);

  Expression parseConstExpression(String code);

  ConstructorInitializer parseConstructorInitializer(String code);

  /**
   * Parse the given source as a compilation unit.
   *
   * @param source the source to be parsed
   * @param errorCodes the error codes of the errors that are expected to be found
   * @return the compilation unit that was parsed
   * @throws Exception if the source could not be parsed, if the compilation errors in the source do
   *           not match those that are expected, or if the result would have been `null`
   */
  CompilationUnit parseDirectives(String source,
      [List<ErrorCode> errorCodes = const <ErrorCode>[]]);

  BinaryExpression parseEqualityExpression(String code);

  Expression parseExpression(String source,
      [List<ErrorCode> errorCodes = const <ErrorCode>[]]);

  List<Expression> parseExpressionList(String code);

  Expression parseExpressionWithoutCascade(String code);

  FormalParameter parseFormalParameter(String code, ParameterKind kind,
      {List<ErrorCode> errorCodes: const <ErrorCode>[]});

  FormalParameterList parseFormalParameterList(String code,
      {bool inFunctionType: false,
      List<ErrorCode> errorCodes: const <ErrorCode>[]});

  /**
   * Parses a single top level member of a compilation unit (other than a
   * directive), including any comment and/or metadata that precedes it.
   */
  CompilationUnitMember parseFullCompilationUnitMember();

  /**
   * Parses a single top level directive, including any comment and/or metadata
   * that precedes it.
   */
  Directive parseFullDirective();

  FunctionExpression parseFunctionExpression(String code);

  InstanceCreationExpression parseInstanceCreationExpression(
      String code, Token newToken);

  ListLiteral parseListLiteral(
      Token token, String typeArgumentsCode, String code);

  TypedLiteral parseListOrMapLiteral(Token modifier, String code);

  Expression parseLogicalAndExpression(String code);

  Expression parseLogicalOrExpression(String code);

  MapLiteral parseMapLiteral(
      Token token, String typeArgumentsCode, String code);

  MapLiteralEntry parseMapLiteralEntry(String code);

  Expression parseMultiplicativeExpression(String code);

  InstanceCreationExpression parseNewExpression(String code);

  NormalFormalParameter parseNormalFormalParameter(String code,
      {bool inFunctionType: false});

  Expression parsePostfixExpression(String code);

  Identifier parsePrefixedIdentifier(String code);

  Expression parsePrimaryExpression(String code);

  Expression parseRelationalExpression(String code);

  RethrowExpression parseRethrowExpression(String code);

  BinaryExpression parseShiftExpression(String code);

  SimpleIdentifier parseSimpleIdentifier(String code);

  Statement parseStatement(String source, [bool enableLazyAssignmentOperators]);

  Expression parseStringLiteral(String code);

  SymbolLiteral parseSymbolLiteral(String code);

  Expression parseThrowExpression(String code);

  Expression parseThrowExpressionWithoutCascade(String code);

  PrefixExpression parseUnaryExpression(String code);
}

/**
 * Instances of the class `AstValidator` are used to validate the correct construction of an
 * AST structure.
 */
class AstValidator extends UnifyingAstVisitor<Object> {
  /**
   * A list containing the errors found while traversing the AST structure.
   */
  List<String> _errors = new List<String>();

  /**
   * Assert that no errors were found while traversing any of the AST structures that have been
   * visited.
   */
  void assertValid() {
    if (!_errors.isEmpty) {
      StringBuffer buffer = new StringBuffer();
      buffer.write("Invalid AST structure:");
      for (String message in _errors) {
        buffer.write("\r\n   ");
        buffer.write(message);
      }
      fail(buffer.toString());
    }
  }

  @override
  Object visitNode(AstNode node) {
    _validate(node);
    return super.visitNode(node);
  }

  /**
   * Validate that the given AST node is correctly constructed.
   *
   * @param node the AST node being validated
   */
  void _validate(AstNode node) {
    AstNode parent = node.parent;
    if (node is CompilationUnit) {
      if (parent != null) {
        _errors.add("Compilation units should not have a parent");
      }
    } else {
      if (parent == null) {
        _errors.add("No parent for ${node.runtimeType}");
      }
    }
    if (node.beginToken == null) {
      _errors.add("No begin token for ${node.runtimeType}");
    }
    if (node.endToken == null) {
      _errors.add("No end token for ${node.runtimeType}");
    }
    int nodeStart = node.offset;
    int nodeLength = node.length;
    if (nodeStart < 0 || nodeLength < 0) {
      _errors.add("No source info for ${node.runtimeType}");
    }
    if (parent != null) {
      int nodeEnd = nodeStart + nodeLength;
      int parentStart = parent.offset;
      int parentEnd = parentStart + parent.length;
      if (nodeStart < parentStart) {
        _errors.add(
            "Invalid source start ($nodeStart) for ${node.runtimeType} inside ${parent.runtimeType} ($parentStart)");
      }
      if (nodeEnd > parentEnd) {
        _errors.add(
            "Invalid source end ($nodeEnd) for ${node.runtimeType} inside ${parent.runtimeType} ($parentStart)");
      }
    }
  }
}

@reflectiveTest
class ClassMemberParserTest extends ParserTestCase
    with ClassMemberParserTestMixin {}

/**
 * Tests which exercise the parser using a class member.
 */
abstract class ClassMemberParserTestMixin implements AbstractParserTestCase {
  void test_parseAwaitExpression_asStatement_inAsync() {
    createParser('m() async { await x; }');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    FunctionBody body = method.body;
    EngineTestCase.assertInstanceOf(
        (obj) => obj is BlockFunctionBody, BlockFunctionBody, body);
    Statement statement = (body as BlockFunctionBody).block.statements[0];
    EngineTestCase.assertInstanceOf(
        (obj) => obj is ExpressionStatement, ExpressionStatement, statement);
    Expression expression = (statement as ExpressionStatement).expression;
    EngineTestCase.assertInstanceOf(
        (obj) => obj is AwaitExpression, AwaitExpression, expression);
    expect((expression as AwaitExpression).awaitKeyword, isNotNull);
    expect((expression as AwaitExpression).expression, isNotNull);
  }

  void test_parseAwaitExpression_asStatement_inSync() {
    createParser('m() { await x; }');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    FunctionBody body = method.body;
    EngineTestCase.assertInstanceOf(
        (obj) => obj is BlockFunctionBody, BlockFunctionBody, body);
    Statement statement = (body as BlockFunctionBody).block.statements[0];
    EngineTestCase.assertInstanceOf(
        (obj) => obj is VariableDeclarationStatement,
        VariableDeclarationStatement,
        statement);
  }

  @failingTest
  void test_parseAwaitExpression_inSync() {
    // This test requires better error recovery than we currently have. In
    // particular, we need to be able to distinguish between an await expression
    // in the wrong context, and the use of 'await' as an identifier.
    createParser('m() { return await x + await y; }');
    MethodDeclaration method = parser.parseClassMember('C');
    expect(method, isNotNull);
    assertNoErrors();
    FunctionBody body = method.body;
    EngineTestCase.assertInstanceOf(
        (obj) => obj is BlockFunctionBody, BlockFunctionBody, body);
    Statement statement = (body as BlockFunctionBody).block.statements[0];
    EngineTestCase.assertInstanceOf(
        (obj) => obj is ReturnStatement, ReturnStatement, statement);
    Expression expression = (statement as ReturnStatement).expression;
    EngineTestCase.assertInstanceOf(
        (obj) => obj is BinaryExpression, BinaryExpression, expression);
    EngineTestCase.assertInstanceOf((obj) => obj is AwaitExpression,
        AwaitExpression, (expression as BinaryExpression).leftOperand);
    EngineTestCase.assertInstanceOf((obj) => obj is AwaitExpression,
        AwaitExpression, (expression as BinaryExpression).rightOperand);
  }

  void test_parseClassMember_constructor_withDocComment() {
    createParser('/// Doc\nC();');
    var constructor = parser.parseClassMember('C') as ConstructorDeclaration;
    expectCommentText(constructor.documentationComment, '/// Doc');
  }

  void test_parseClassMember_constructor_withInitializers() {
    // TODO(brianwilkerson) Test other kinds of class members: fields, getters
    // and setters.
    createParser('C(_, _\$, this.__) : _a = _ + _\$ {}');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<ConstructorDeclaration>());
    ConstructorDeclaration constructor = member;
    expect(constructor.body, isNotNull);
    expect(constructor.separator, isNotNull);
    expect(constructor.externalKeyword, isNull);
    expect(constructor.constKeyword, isNull);
    expect(constructor.factoryKeyword, isNull);
    expect(constructor.name, isNull);
    expect(constructor.parameters, isNotNull);
    expect(constructor.period, isNull);
    expect(constructor.returnType, isNotNull);
    expect(constructor.initializers, hasLength(1));
  }

  void test_parseClassMember_field_covariant() {
    createParser('covariant T f;');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<FieldDeclaration>());
    FieldDeclaration field = member;
    expect(field.covariantKeyword, isNotNull);
    expect(field.documentationComment, isNull);
    expect(field.metadata, hasLength(0));
    expect(field.staticKeyword, isNull);
    VariableDeclarationList list = field.fields;
    expect(list, isNotNull);
    NodeList<VariableDeclaration> variables = list.variables;
    expect(variables, hasLength(1));
    VariableDeclaration variable = variables[0];
    expect(variable.name, isNotNull);
  }

  void test_parseClassMember_field_instance_prefixedType() {
    createParser('p.A f;');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<FieldDeclaration>());
    FieldDeclaration field = member;
    expect(field.covariantKeyword, isNull);
    expect(field.documentationComment, isNull);
    expect(field.metadata, hasLength(0));
    expect(field.staticKeyword, isNull);
    VariableDeclarationList list = field.fields;
    expect(list, isNotNull);
    NodeList<VariableDeclaration> variables = list.variables;
    expect(variables, hasLength(1));
    VariableDeclaration variable = variables[0];
    expect(variable.name, isNotNull);
    _assertIsDeclarationName(variable.name);
  }

  void test_parseClassMember_field_namedGet() {
    createParser('var get;');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<FieldDeclaration>());
    FieldDeclaration field = member;
    expect(field.covariantKeyword, isNull);
    expect(field.documentationComment, isNull);
    expect(field.metadata, hasLength(0));
    expect(field.staticKeyword, isNull);
    VariableDeclarationList list = field.fields;
    expect(list, isNotNull);
    NodeList<VariableDeclaration> variables = list.variables;
    expect(variables, hasLength(1));
    VariableDeclaration variable = variables[0];
    expect(variable.name, isNotNull);
  }

  void test_parseClassMember_field_namedOperator() {
    createParser('var operator;');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<FieldDeclaration>());
    FieldDeclaration field = member;
    expect(field.covariantKeyword, isNull);
    expect(field.documentationComment, isNull);
    expect(field.metadata, hasLength(0));
    expect(field.staticKeyword, isNull);
    VariableDeclarationList list = field.fields;
    expect(list, isNotNull);
    NodeList<VariableDeclaration> variables = list.variables;
    expect(variables, hasLength(1));
    VariableDeclaration variable = variables[0];
    expect(variable.name, isNotNull);
  }

  void test_parseClassMember_field_namedOperator_withAssignment() {
    createParser('var operator = (5);');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<FieldDeclaration>());
    FieldDeclaration field = member;
    expect(field.covariantKeyword, isNull);
    expect(field.documentationComment, isNull);
    expect(field.metadata, hasLength(0));
    expect(field.staticKeyword, isNull);
    VariableDeclarationList list = field.fields;
    expect(list, isNotNull);
    NodeList<VariableDeclaration> variables = list.variables;
    expect(variables, hasLength(1));
    VariableDeclaration variable = variables[0];
    expect(variable.name, isNotNull);
    expect(variable.initializer, isNotNull);
  }

  void test_parseClassMember_field_namedSet() {
    createParser('var set;');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<FieldDeclaration>());
    FieldDeclaration field = member;
    expect(field.covariantKeyword, isNull);
    expect(field.documentationComment, isNull);
    expect(field.metadata, hasLength(0));
    expect(field.staticKeyword, isNull);
    VariableDeclarationList list = field.fields;
    expect(list, isNotNull);
    NodeList<VariableDeclaration> variables = list.variables;
    expect(variables, hasLength(1));
    VariableDeclaration variable = variables[0];
    expect(variable.name, isNotNull);
  }

  void test_parseClassMember_field_static() {
    createParser('static A f;');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<FieldDeclaration>());
    FieldDeclaration field = member;
    expect(field.covariantKeyword, isNull);
    expect(field.documentationComment, isNull);
    expect(field.metadata, hasLength(0));
    expect(field.staticKeyword, isNotNull);
    VariableDeclarationList list = field.fields;
    expect(list, isNotNull);
    NodeList<VariableDeclaration> variables = list.variables;
    expect(variables, hasLength(1));
    VariableDeclaration variable = variables[0];
    expect(variable.name, isNotNull);
  }

  void test_parseClassMember_getter_functionType() {
    createParser('int Function(int) get g {}');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    expect(method.documentationComment, isNull);
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNull);
    expect(method.propertyKeyword, isNotNull);
    expect(method.returnType, isNotNull);
    expect(method.name, isNotNull);
    expect(method.operatorKeyword, isNull);
    expect(method.body, isNotNull);
    expect(method.parameters, isNull);
  }

  void test_parseClassMember_getter_void() {
    createParser('void get g {}');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    expect(method.documentationComment, isNull);
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNull);
    expect(method.propertyKeyword, isNotNull);
    expect(method.returnType, isNotNull);
    expect(method.name, isNotNull);
    _assertIsDeclarationName(method.name);
    expect(method.operatorKeyword, isNull);
    expect(method.body, isNotNull);
    expect(method.parameters, isNull);
  }

  void test_parseClassMember_method_external() {
    createParser('external m();');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    expect(method.documentationComment, isNull);
    expect(method.externalKeyword, isNotNull);
    expect(method.modifierKeyword, isNull);
    expect(method.name, isNotNull);
    _assertIsDeclarationName(method.name);
    expect(method.operatorKeyword, isNull);
    expect(method.typeParameters, isNull);
    expect(method.parameters, isNotNull);
    expect(method.propertyKeyword, isNull);
    expect(method.returnType, isNull);

    var body = method.body as EmptyFunctionBody;
    expect(body.keyword, isNull);
    expect(body.star, isNull);
    expect(body.semicolon.type, TokenType.SEMICOLON);
  }

  void test_parseClassMember_method_external_withTypeAndArgs() {
    createParser('external int m(int a);');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    expect(method.body, isNotNull);
    expect(method.documentationComment, isNull);
    expect(method.externalKeyword, isNotNull);
    expect(method.modifierKeyword, isNull);
    expect(method.name, isNotNull);
    expect(method.operatorKeyword, isNull);
    expect(method.typeParameters, isNull);
    expect(method.parameters, isNotNull);
    expect(method.propertyKeyword, isNull);
    expect(method.returnType, isNotNull);
  }

  void test_parseClassMember_method_generic_comment_noReturnType() {
    enableGenericMethodComments = true;
    createParser('m/*<T>*/() {}');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    expect(method.documentationComment, isNull);
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNull);
    expect(method.propertyKeyword, isNull);
    expect(method.returnType, isNull);
    expect(method.name, isNotNull);
    expect(method.operatorKeyword, isNull);
    expect(method.typeParameters, isNotNull);
    expect(method.parameters, isNotNull);
    expect(method.body, isNotNull);
  }

  void test_parseClassMember_method_generic_comment_returnType() {
    enableGenericMethodComments = true;
    createParser('/*=T*/ m/*<T>*/() {}');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    expect(method.documentationComment, isNull);
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNull);
    expect(method.propertyKeyword, isNull);
    expect((method.returnType as TypeName).name.name, 'T');
    expect(method.name, isNotNull);
    expect(method.operatorKeyword, isNull);
    expect(method.typeParameters, isNotNull);
    expect(method.parameters, isNotNull);
    expect(method.body, isNotNull);
  }

  void test_parseClassMember_method_generic_comment_returnType_bound() {
    enableGenericMethodComments = true;
    createParser('num/*=T*/ m/*<T extends num>*/() {}');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    expect(method.documentationComment, isNull);
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNull);
    expect(method.propertyKeyword, isNull);
    expect((method.returnType as TypeName).name.name, 'T');
    expect(method.name, isNotNull);
    expect(method.operatorKeyword, isNull);
    expect(method.typeParameters, isNotNull);
    TypeParameter tp = method.typeParameters.typeParameters[0];
    expect(tp.name.name, 'T');
    expect(tp.extendsKeyword, isNotNull);
    expect((tp.bound as TypeName).name.name, 'num');
    expect(method.parameters, isNotNull);
    expect(method.body, isNotNull);
  }

  void test_parseClassMember_method_generic_comment_void() {
    enableGenericMethodComments = true;
    createParser('void m/*<T>*/() {}');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    expect(method.documentationComment, isNull);
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNull);
    expect(method.propertyKeyword, isNull);
    expect(method.returnType, isNotNull);
    expect(method.name, isNotNull);
    expect(method.operatorKeyword, isNull);
    expect(method.typeParameters, isNotNull);
    expect(method.parameters, isNotNull);
    expect(method.body, isNotNull);
  }

  void test_parseClassMember_method_generic_noReturnType() {
    createParser('m<T>() {}');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    expect(method.documentationComment, isNull);
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNull);
    expect(method.propertyKeyword, isNull);
    expect(method.returnType, isNull);
    expect(method.name, isNotNull);
    expect(method.operatorKeyword, isNull);
    expect(method.typeParameters, isNotNull);
    expect(method.parameters, isNotNull);
    expect(method.body, isNotNull);
  }

  void test_parseClassMember_method_generic_returnType() {
    createParser('T m<T>() {}');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    expect(method.documentationComment, isNull);
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNull);
    expect(method.propertyKeyword, isNull);
    expect(method.returnType, isNotNull);
    expect(method.name, isNotNull);
    expect(method.operatorKeyword, isNull);
    expect(method.typeParameters, isNotNull);
    expect(method.parameters, isNotNull);
    expect(method.body, isNotNull);
  }

  void test_parseClassMember_method_generic_void() {
    createParser('void m<T>() {}');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    expect(method.documentationComment, isNull);
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNull);
    expect(method.propertyKeyword, isNull);
    expect(method.returnType, isNotNull);
    expect(method.name, isNotNull);
    expect(method.operatorKeyword, isNull);
    expect(method.typeParameters, isNotNull);
    expect(method.parameters, isNotNull);
    expect(method.body, isNotNull);
  }

  void test_parseClassMember_method_get_noType() {
    createParser('get() {}');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    expect(method.documentationComment, isNull);
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNull);
    expect(method.propertyKeyword, isNull);
    expect(method.returnType, isNull);
    expect(method.name, isNotNull);
    expect(method.operatorKeyword, isNull);
    expect(method.typeParameters, isNull);
    expect(method.parameters, isNotNull);
    expect(method.body, isNotNull);
  }

  void test_parseClassMember_method_get_type() {
    createParser('int get() {}');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    expect(method.documentationComment, isNull);
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNull);
    expect(method.propertyKeyword, isNull);
    expect(method.returnType, isNotNull);
    expect(method.name, isNotNull);
    expect(method.operatorKeyword, isNull);
    expect(method.typeParameters, isNull);
    expect(method.parameters, isNotNull);
    expect(method.body, isNotNull);
  }

  void test_parseClassMember_method_get_void() {
    createParser('void get() {}');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    expect(method.documentationComment, isNull);
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNull);
    expect(method.propertyKeyword, isNull);
    expect(method.returnType, isNotNull);
    expect(method.name, isNotNull);
    expect(method.operatorKeyword, isNull);
    expect(method.typeParameters, isNull);
    expect(method.parameters, isNotNull);
    expect(method.body, isNotNull);
  }

  void test_parseClassMember_method_operator_noType() {
    createParser('operator() {}');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    expect(method.documentationComment, isNull);
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNull);
    expect(method.propertyKeyword, isNull);
    expect(method.returnType, isNull);
    expect(method.name, isNotNull);
    expect(method.operatorKeyword, isNull);
    expect(method.typeParameters, isNull);
    expect(method.parameters, isNotNull);
    expect(method.body, isNotNull);
  }

  void test_parseClassMember_method_operator_type() {
    createParser('int operator() {}');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    expect(method.documentationComment, isNull);
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNull);
    expect(method.propertyKeyword, isNull);
    expect(method.returnType, isNotNull);
    expect(method.name, isNotNull);
    expect(method.operatorKeyword, isNull);
    expect(method.typeParameters, isNull);
    expect(method.parameters, isNotNull);
    expect(method.body, isNotNull);
  }

  void test_parseClassMember_method_operator_void() {
    createParser('void operator() {}');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    expect(method.documentationComment, isNull);
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNull);
    expect(method.propertyKeyword, isNull);
    expect(method.returnType, isNotNull);
    expect(method.name, isNotNull);
    expect(method.operatorKeyword, isNull);
    expect(method.typeParameters, isNull);
    expect(method.parameters, isNotNull);
    expect(method.body, isNotNull);
  }

  void test_parseClassMember_method_returnType_functionType() {
    createParser('int Function(String) m() {}');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    expect(method.documentationComment, isNull);
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNull);
    expect(method.propertyKeyword, isNull);
    expect(method.returnType, isNotNull);
    expect(method.name, isNotNull);
    expect(method.name.name, 'm');
    expect(method.operatorKeyword, isNull);
    expect(method.typeParameters, isNull);
    expect(method.parameters, isNotNull);
    expect(method.body, isNotNull);
  }

  void test_parseClassMember_method_returnType_parameterized() {
    createParser('p.A m() {}');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    expect(method.documentationComment, isNull);
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNull);
    expect(method.propertyKeyword, isNull);
    expect(method.returnType, isNotNull);
    expect(method.name, isNotNull);
    expect(method.operatorKeyword, isNull);
    expect(method.typeParameters, isNull);
    expect(method.parameters, isNotNull);
    expect(method.body, isNotNull);
  }

  void test_parseClassMember_method_set_noType() {
    createParser('set() {}');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    expect(method.documentationComment, isNull);
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNull);
    expect(method.propertyKeyword, isNull);
    expect(method.returnType, isNull);
    expect(method.name, isNotNull);
    expect(method.operatorKeyword, isNull);
    expect(method.typeParameters, isNull);
    expect(method.parameters, isNotNull);
    expect(method.body, isNotNull);
  }

  void test_parseClassMember_method_set_type() {
    createParser('int set() {}');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    expect(method.documentationComment, isNull);
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNull);
    expect(method.propertyKeyword, isNull);
    expect(method.returnType, isNotNull);
    expect(method.name, isNotNull);
    expect(method.operatorKeyword, isNull);
    expect(method.typeParameters, isNull);
    expect(method.parameters, isNotNull);
    expect(method.body, isNotNull);
  }

  void test_parseClassMember_method_set_void() {
    createParser('void set() {}');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    expect(method.documentationComment, isNull);
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNull);
    expect(method.propertyKeyword, isNull);
    expect(method.returnType, isNotNull);
    expect(method.name, isNotNull);
    expect(method.operatorKeyword, isNull);
    expect(method.typeParameters, isNull);
    expect(method.parameters, isNotNull);
    expect(method.body, isNotNull);
  }

  void test_parseClassMember_method_trailing_commas() {
    createParser('void f(int x, int y,) {}');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    expect(method.documentationComment, isNull);
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNull);
    expect(method.propertyKeyword, isNull);
    expect(method.returnType, isNotNull);
    expect(method.name, isNotNull);
    expect(method.operatorKeyword, isNull);
    expect(method.typeParameters, isNull);
    expect(method.parameters, isNotNull);
    expect(method.body, isNotNull);
  }

  void test_parseClassMember_operator_functionType() {
    createParser('int Function() operator +(int Function() f) {}');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    expect(method.documentationComment, isNull);
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNull);
    expect(method.propertyKeyword, isNull);
    expect(method.returnType, new isInstanceOf<GenericFunctionType>());
    expect(method.name, isNotNull);
    expect(method.operatorKeyword, isNotNull);
    expect(method.typeParameters, isNull);
    expect(method.parameters, isNotNull);
    NodeList<FormalParameter> parameters = method.parameters.parameters;
    expect(parameters, hasLength(1));
    expect((parameters[0] as SimpleFormalParameter).type,
        new isInstanceOf<GenericFunctionType>());
    expect(method.body, isNotNull);
  }

  void test_parseClassMember_operator_index() {
    createParser('int operator [](int i) {}');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    expect(method.documentationComment, isNull);
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNull);
    expect(method.propertyKeyword, isNull);
    expect(method.returnType, isNotNull);
    expect(method.name, isNotNull);
    expect(method.operatorKeyword, isNotNull);
    expect(method.typeParameters, isNull);
    expect(method.parameters, isNotNull);
    expect(method.body, isNotNull);
  }

  void test_parseClassMember_operator_indexAssign() {
    createParser('int operator []=(int i) {}');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    expect(method.documentationComment, isNull);
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNull);
    expect(method.propertyKeyword, isNull);
    expect(method.returnType, isNotNull);
    expect(method.name, isNotNull);
    expect(method.operatorKeyword, isNotNull);
    expect(method.typeParameters, isNull);
    expect(method.parameters, isNotNull);
    expect(method.body, isNotNull);
  }

  void test_parseClassMember_redirectingFactory_const() {
    createParser('const factory C() = prefix.B.foo;');
    var constructor = parser.parseClassMember('C') as ConstructorDeclaration;
    assertNoErrors();
    expect(constructor, isNotNull);
    expect(constructor.externalKeyword, isNull);
    expect(constructor.constKeyword.keyword, Keyword.CONST);
    expect(constructor.factoryKeyword.keyword, Keyword.FACTORY);
    expect(constructor.returnType.name, 'C');
    expect(constructor.period, isNull);
    expect(constructor.name, isNull);
    _assertIsDeclarationName(constructor.returnType, false);
    expect(constructor.parameters, isNotNull);
    expect(constructor.parameters.parameters, isEmpty);
    expect(constructor.separator.type, TokenType.EQ);
    expect(constructor.initializers, isEmpty);
    expect(constructor.redirectedConstructor, isNotNull);
    expect(constructor.redirectedConstructor.type.name.name, 'prefix.B');
    expect(constructor.redirectedConstructor.period.type, TokenType.PERIOD);
    expect(constructor.redirectedConstructor.name.name, 'foo');
    expect(constructor.body, new isInstanceOf<EmptyFunctionBody>());
  }

  void test_parseClassMember_redirectingFactory_expressionBody() {
    createParser('factory C() => null;');
    var constructor = parser.parseClassMember('C') as ConstructorDeclaration;
    assertNoErrors();
    expect(constructor, isNotNull);
    expect(constructor.externalKeyword, isNull);
    expect(constructor.constKeyword, isNull);
    expect(constructor.factoryKeyword.keyword, Keyword.FACTORY);
    expect(constructor.returnType.name, 'C');
    expect(constructor.period, isNull);
    expect(constructor.name, isNull);
    expect(constructor.parameters, isNotNull);
    expect(constructor.parameters.parameters, isEmpty);
    expect(constructor.separator, isNull);
    expect(constructor.initializers, isEmpty);
    expect(constructor.redirectedConstructor, isNull);

    var body = constructor.body as ExpressionFunctionBody;
    expect(body.keyword, isNull);
    expect(body.star, isNull);
    expect(body.functionDefinition.type, TokenType.FUNCTION);
    expect(body.expression, isNotNull);
    expect(body.semicolon, isNotNull);
  }

  void test_parseClassMember_redirectingFactory_nonConst() {
    createParser('factory C() = B;');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<ConstructorDeclaration>());
    ConstructorDeclaration constructor = member;
    expect(constructor.externalKeyword, isNull);
    expect(constructor.constKeyword, isNull);
    expect(constructor.factoryKeyword.keyword, Keyword.FACTORY);
    expect(constructor.returnType.name, 'C');
    _assertIsDeclarationName(constructor.returnType, false);
    expect(constructor.period, isNull);
    expect(constructor.name, isNull);
    expect(constructor.parameters, isNotNull);
    expect(constructor.parameters.parameters, isEmpty);
    expect(constructor.separator.type, TokenType.EQ);
    expect(constructor.initializers, isEmpty);
    expect(constructor.redirectedConstructor, isNotNull);
    expect(constructor.redirectedConstructor.type.name.name, 'B');
    expect(constructor.redirectedConstructor.period, isNull);
    expect(constructor.redirectedConstructor.name, isNull);
    expect(constructor.body, new isInstanceOf<EmptyFunctionBody>());
  }

  void test_parseConstructor_assert() {
    enableAssertInitializer = true;
    createParser('C(x, y) : _x = x, assert (x < y), _y = y;');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<ConstructorDeclaration>());
    ConstructorDeclaration constructor = member as ConstructorDeclaration;
    NodeList<ConstructorInitializer> initializers = constructor.initializers;
    expect(initializers, hasLength(3));
    ConstructorInitializer initializer = initializers[1];
    expect(initializer, new isInstanceOf<AssertInitializer>());
    AssertInitializer assertInitializer = initializer;
    expect(assertInitializer.condition, isNotNull);
    expect(assertInitializer.message, isNull);
  }

  void test_parseConstructor_initializers_field() {
    createParser('C(x, y) : _x = x, this._y = y;');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<ConstructorDeclaration>());
    ConstructorDeclaration constructor = member as ConstructorDeclaration;
    NodeList<ConstructorInitializer> initializers = constructor.initializers;
    expect(initializers, hasLength(2));

    {
      var initializer = initializers[0] as ConstructorFieldInitializer;
      expect(initializer.thisKeyword, isNull);
      expect(initializer.period, isNull);
      expect(initializer.fieldName.name, '_x');
      expect(initializer.expression, isNotNull);
    }

    {
      var initializer = initializers[1] as ConstructorFieldInitializer;
      expect(initializer.thisKeyword, isNotNull);
      expect(initializer.period, isNotNull);
      expect(initializer.fieldName.name, '_y');
      expect(initializer.expression, isNotNull);
    }
  }

  void test_parseConstructor_named() {
    createParser('C.foo();');
    var constructor = parser.parseClassMember('C') as ConstructorDeclaration;
    assertNoErrors();
    expect(constructor, isNotNull);
    expect(constructor.externalKeyword, isNull);
    expect(constructor.constKeyword, isNull);
    expect(constructor.factoryKeyword, isNull);
    expect(constructor.returnType.name, 'C');
    _assertIsDeclarationName(constructor.returnType, false);
    expect(constructor.period.type, TokenType.PERIOD);
    expect(constructor.name.name, 'foo');
    _assertIsDeclarationName(constructor.name);
    expect(constructor.parameters, isNotNull);
    expect(constructor.parameters.parameters, isEmpty);
    expect(constructor.separator, isNull);
    expect(constructor.initializers, isEmpty);
    expect(constructor.redirectedConstructor, isNull);
    expect(constructor.body, new isInstanceOf<EmptyFunctionBody>());
  }

  void test_parseConstructor_unnamed() {
    createParser('C();');
    var constructor = parser.parseClassMember('C') as ConstructorDeclaration;
    assertNoErrors();
    expect(constructor, isNotNull);
    expect(constructor.externalKeyword, isNull);
    expect(constructor.constKeyword, isNull);
    expect(constructor.factoryKeyword, isNull);
    expect(constructor.returnType.name, 'C');
    _assertIsDeclarationName(constructor.returnType, false);
    expect(constructor.period, isNull);
    expect(constructor.name, isNull);
    expect(constructor.parameters, isNotNull);
    expect(constructor.parameters.parameters, isEmpty);
    expect(constructor.separator, isNull);
    expect(constructor.initializers, isEmpty);
    expect(constructor.redirectedConstructor, isNull);
    expect(constructor.body, new isInstanceOf<EmptyFunctionBody>());
  }

  void test_parseConstructor_with_pseudo_function_literal() {
    // "(b) {}" should not be misinterpreted as a function literal even though
    // it looks like one.
    createParser('C() : a = (b) {}');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    assertNoErrors();
    expect(member, new isInstanceOf<ConstructorDeclaration>());
    ConstructorDeclaration constructor = member as ConstructorDeclaration;
    NodeList<ConstructorInitializer> initializers = constructor.initializers;
    expect(initializers, hasLength(1));
    ConstructorInitializer initializer = initializers[0];
    EngineTestCase.assertInstanceOf((obj) => obj is ConstructorFieldInitializer,
        ConstructorFieldInitializer, initializer);
    EngineTestCase.assertInstanceOf(
        (obj) => obj is ParenthesizedExpression,
        ParenthesizedExpression,
        (initializer as ConstructorFieldInitializer).expression);
    EngineTestCase.assertInstanceOf(
        (obj) => obj is BlockFunctionBody, BlockFunctionBody, constructor.body);
  }

  void test_parseConstructorFieldInitializer_qualified() {
    createParser('this.a = b');
    ConstructorFieldInitializer initializer =
        parser.parseConstructorFieldInitializer(true);
    expect(initializer, isNotNull);
    assertNoErrors();
    expect(initializer.equals, isNotNull);
    expect(initializer.expression, isNotNull);
    expect(initializer.fieldName, isNotNull);
    expect(initializer.thisKeyword, isNotNull);
    expect(initializer.period, isNotNull);
  }

  void test_parseConstructorFieldInitializer_unqualified() {
    createParser('a = b');
    ConstructorFieldInitializer initializer =
        parser.parseConstructorFieldInitializer(false);
    expect(initializer, isNotNull);
    assertNoErrors();
    expect(initializer.equals, isNotNull);
    expect(initializer.expression, isNotNull);
    expect(initializer.fieldName, isNotNull);
    expect(initializer.thisKeyword, isNull);
    expect(initializer.period, isNull);
  }

  void test_parseGetter_nonStatic() {
    createParser('/// Doc\nT get a;');
    MethodDeclaration method = parser.parseClassMember('C');
    expect(method, isNotNull);
    assertNoErrors();
    expect(method.body, isNotNull);
    expectCommentText(method.documentationComment, '/// Doc');
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNull);
    expect(method.name, isNotNull);
    expect(method.operatorKeyword, isNull);
    expect(method.parameters, isNull);
    expect(method.propertyKeyword, isNotNull);
    expect((method.returnType as TypeName).name.name, 'T');
  }

  void test_parseGetter_static() {
    createParser('/// Doc\nstatic T get a => 42;');
    MethodDeclaration method = parser.parseClassMember('C');
    expect(method, isNotNull);
    assertNoErrors();
    expect(method.body, isNotNull);
    expectCommentText(method.documentationComment, '/// Doc');
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword.lexeme, 'static');
    expect(method.name, isNotNull);
    expect(method.operatorKeyword, isNull);
    expect(method.typeParameters, isNull);
    expect(method.parameters, isNull);
    expect(method.propertyKeyword, isNotNull);
    expect((method.returnType as TypeName).name.name, 'T');
  }

  void test_parseInitializedIdentifierList_type() {
    createParser("/// Doc\nstatic T a = 1, b, c = 3;");
    FieldDeclaration declaration = parser.parseClassMember('C');
    expect(declaration, isNotNull);
    assertNoErrors();
    expectCommentText(declaration.documentationComment, '/// Doc');
    VariableDeclarationList fields = declaration.fields;
    expect(fields, isNotNull);
    expect(fields.keyword, isNull);
    expect((fields.type as TypeName).name.name, 'T');
    expect(fields.variables, hasLength(3));
    expect(declaration.staticKeyword.lexeme, 'static');
    expect(declaration.semicolon, isNotNull);
  }

  void test_parseInitializedIdentifierList_var() {
    createParser('/// Doc\nstatic var a = 1, b, c = 3;');
    FieldDeclaration declaration = parser.parseClassMember('C');
    expect(declaration, isNotNull);
    assertNoErrors();
    expectCommentText(declaration.documentationComment, '/// Doc');
    VariableDeclarationList fields = declaration.fields;
    expect(fields, isNotNull);
    expect(fields.keyword.lexeme, 'var');
    expect(fields.type, isNull);
    expect(fields.variables, hasLength(3));
    expect(declaration.staticKeyword.lexeme, 'static');
    expect(declaration.semicolon, isNotNull);
  }

  void test_parseOperator() {
    createParser('/// Doc\nT operator +(A a);');
    MethodDeclaration method = parser.parseClassMember('C');
    expect(method, isNotNull);
    assertNoErrors();
    expect(method.body, isNotNull);
    expectCommentText(method.documentationComment, '/// Doc');
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNull);
    expect(method.name, isNotNull);
    expect(method.operatorKeyword, isNotNull);
    expect(method.typeParameters, isNull);
    expect(method.parameters, isNotNull);
    expect(method.propertyKeyword, isNull);
    expect((method.returnType as TypeName).name.name, 'T');
  }

  void test_parseSetter_nonStatic() {
    createParser('/// Doc\nT set a(var x);');
    MethodDeclaration method = parser.parseClassMember('C');
    expect(method, isNotNull);
    assertNoErrors();
    expect(method.body, isNotNull);
    expectCommentText(method.documentationComment, '/// Doc');
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNull);
    expect(method.name, isNotNull);
    expect(method.operatorKeyword, isNull);
    expect(method.typeParameters, isNull);
    expect(method.parameters, isNotNull);
    expect(method.propertyKeyword, isNotNull);
    expect((method.returnType as TypeName).name.name, 'T');
  }

  void test_parseSetter_static() {
    createParser('/// Doc\nstatic T set a(var x) {}');
    MethodDeclaration method = parser.parseClassMember('C');
    expect(method, isNotNull);
    assertNoErrors();
    expect(method.body, isNotNull);
    expectCommentText(method.documentationComment, '/// Doc');
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword.lexeme, 'static');
    expect(method.name, isNotNull);
    expect(method.operatorKeyword, isNull);
    expect(method.typeParameters, isNull);
    expect(method.parameters, isNotNull);
    expect(method.propertyKeyword, isNotNull);
    expect((method.returnType as TypeName).name.name, 'T');
  }

  void test_simpleFormalParameter_withDocComment() {
    createParser('''
int f(
    /// Doc
    int x) {}
''');
    var function = parseFullCompilationUnitMember() as FunctionDeclaration;
    var parameter = function.functionExpression.parameters.parameters[0]
        as NormalFormalParameter;
    expectCommentText(parameter.documentationComment, '/// Doc');
  }

  /**
   * Assert that the given [name] is in declaration context.
   */
  void _assertIsDeclarationName(SimpleIdentifier name, [bool expected = true]) {
    expect(name.inDeclarationContext(), expected);
  }
}

/**
 * Tests of the analyzer parser based on [ComplexParserTestMixin].
 */
@reflectiveTest
class ComplexParserTest extends ParserTestCase with ComplexParserTestMixin {}

/**
 * The class `ComplexParserTest` defines parser tests that test the parsing of more complex
 * code fragments or the interactions between multiple parsing methods. For example, tests to ensure
 * that the precedence of operations is being handled correctly should be defined in this class.
 *
 * Simpler tests should be defined in the class [SimpleParserTest].
 */
abstract class ComplexParserTestMixin implements AbstractParserTestCase {
  void test_additiveExpression_normal() {
    BinaryExpression expression = parseExpression("x + y - z");
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.leftOperand);
  }

  void test_additiveExpression_noSpaces() {
    BinaryExpression expression = parseExpression("i+1");
    EngineTestCase.assertInstanceOf((obj) => obj is SimpleIdentifier,
        SimpleIdentifier, expression.leftOperand);
    EngineTestCase.assertInstanceOf((obj) => obj is IntegerLiteral,
        IntegerLiteral, expression.rightOperand);
  }

  void test_additiveExpression_precedence_multiplicative_left() {
    BinaryExpression expression = parseExpression("x * y + z");
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.leftOperand);
  }

  void test_additiveExpression_precedence_multiplicative_left_withSuper() {
    BinaryExpression expression = parseExpression("super * y - z");
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.leftOperand);
  }

  void test_additiveExpression_precedence_multiplicative_right() {
    BinaryExpression expression = parseExpression("x + y * z");
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.rightOperand);
  }

  void test_additiveExpression_super() {
    BinaryExpression expression = parseExpression("super + y - z");
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.leftOperand);
  }

  void test_assignableExpression_arguments_normal_chain() {
    PropertyAccess propertyAccess1 = parseExpression("a(b)(c).d(e).f");
    expect(propertyAccess1.propertyName.name, "f");
    //
    // a(b)(c).d(e)
    //
    MethodInvocation invocation2 = EngineTestCase.assertInstanceOf(
        (obj) => obj is MethodInvocation,
        MethodInvocation,
        propertyAccess1.target);
    expect(invocation2.methodName.name, "d");
    expect(invocation2.typeArguments, isNull);
    ArgumentList argumentList2 = invocation2.argumentList;
    expect(argumentList2, isNotNull);
    expect(argumentList2.arguments, hasLength(1));
    //
    // a(b)(c)
    //
    FunctionExpressionInvocation invocation3 = EngineTestCase.assertInstanceOf(
        (obj) => obj is FunctionExpressionInvocation,
        FunctionExpressionInvocation,
        invocation2.target);
    expect(invocation3.typeArguments, isNull);
    ArgumentList argumentList3 = invocation3.argumentList;
    expect(argumentList3, isNotNull);
    expect(argumentList3.arguments, hasLength(1));
    //
    // a(b)
    //
    MethodInvocation invocation4 = EngineTestCase.assertInstanceOf(
        (obj) => obj is MethodInvocation,
        MethodInvocation,
        invocation3.function);
    expect(invocation4.methodName.name, "a");
    expect(invocation4.typeArguments, isNull);
    ArgumentList argumentList4 = invocation4.argumentList;
    expect(argumentList4, isNotNull);
    expect(argumentList4.arguments, hasLength(1));
  }

  void test_assignableExpression_arguments_normal_chain_typeArgumentComments() {
    enableGenericMethodComments = true;
    _validate_assignableExpression_arguments_normal_chain_typeArguments(
        "a/*<E>*/(b)/*<F>*/(c).d/*<G>*/(e).f");
  }

  void test_assignableExpression_arguments_normal_chain_typeArguments() {
    _validate_assignableExpression_arguments_normal_chain_typeArguments(
        "a<E>(b)<F>(c).d<G>(e).f");
  }

  void test_assignmentExpression_compound() {
    AssignmentExpression expression = parseExpression("x = y = 0");
    EngineTestCase.assertInstanceOf((obj) => obj is SimpleIdentifier,
        SimpleIdentifier, expression.leftHandSide);
    EngineTestCase.assertInstanceOf((obj) => obj is AssignmentExpression,
        AssignmentExpression, expression.rightHandSide);
  }

  void test_assignmentExpression_indexExpression() {
    AssignmentExpression expression = parseExpression("x[1] = 0");
    EngineTestCase.assertInstanceOf((obj) => obj is IndexExpression,
        IndexExpression, expression.leftHandSide);
    EngineTestCase.assertInstanceOf((obj) => obj is IntegerLiteral,
        IntegerLiteral, expression.rightHandSide);
  }

  void test_assignmentExpression_prefixedIdentifier() {
    AssignmentExpression expression = parseExpression("x.y = 0");
    EngineTestCase.assertInstanceOf((obj) => obj is PrefixedIdentifier,
        PrefixedIdentifier, expression.leftHandSide);
    EngineTestCase.assertInstanceOf((obj) => obj is IntegerLiteral,
        IntegerLiteral, expression.rightHandSide);
  }

  void test_assignmentExpression_propertyAccess() {
    AssignmentExpression expression = parseExpression("super.y = 0");
    EngineTestCase.assertInstanceOf((obj) => obj is PropertyAccess,
        PropertyAccess, expression.leftHandSide);
    EngineTestCase.assertInstanceOf((obj) => obj is IntegerLiteral,
        IntegerLiteral, expression.rightHandSide);
  }

  void test_bitwiseAndExpression_normal() {
    BinaryExpression expression = parseExpression("x & y & z");
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.leftOperand);
  }

  void test_bitwiseAndExpression_precedence_equality_left() {
    BinaryExpression expression = parseExpression("x == y && z");
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.leftOperand);
  }

  void test_bitwiseAndExpression_precedence_equality_right() {
    BinaryExpression expression = parseExpression("x && y == z");
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.rightOperand);
  }

  void test_bitwiseAndExpression_super() {
    BinaryExpression expression = parseExpression("super & y & z");
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.leftOperand);
  }

  void test_bitwiseOrExpression_normal() {
    BinaryExpression expression = parseExpression("x | y | z");
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.leftOperand);
  }

  void test_bitwiseOrExpression_precedence_xor_left() {
    BinaryExpression expression = parseExpression("x ^ y | z");
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.leftOperand);
  }

  void test_bitwiseOrExpression_precedence_xor_right() {
    BinaryExpression expression = parseExpression("x | y ^ z");
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.rightOperand);
  }

  void test_bitwiseOrExpression_super() {
    BinaryExpression expression = parseExpression("super | y | z");
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.leftOperand);
  }

  void test_bitwiseXorExpression_normal() {
    BinaryExpression expression = parseExpression("x ^ y ^ z");
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.leftOperand);
  }

  void test_bitwiseXorExpression_precedence_and_left() {
    BinaryExpression expression = parseExpression("x & y ^ z");
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.leftOperand);
  }

  void test_bitwiseXorExpression_precedence_and_right() {
    BinaryExpression expression = parseExpression("x ^ y & z");
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.rightOperand);
  }

  void test_bitwiseXorExpression_super() {
    BinaryExpression expression = parseExpression("super ^ y ^ z");
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.leftOperand);
  }

  void test_cascade_withAssignment() {
    CascadeExpression cascade =
        parseExpression("new Map()..[3] = 4 ..[0] = 11");
    Expression target = cascade.target;
    for (Expression section in cascade.cascadeSections) {
      EngineTestCase.assertInstanceOf(
          (obj) => obj is AssignmentExpression, AssignmentExpression, section);
      Expression lhs = (section as AssignmentExpression).leftHandSide;
      EngineTestCase.assertInstanceOf(
          (obj) => obj is IndexExpression, IndexExpression, lhs);
      IndexExpression index = lhs as IndexExpression;
      expect(index.isCascaded, isTrue);
      expect(index.realTarget, same(target));
    }
  }

  void test_conditionalExpression_precedence_ifNullExpression() {
    ConditionalExpression expression = parseExpression('a ?? b ? y : z');
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.condition);
  }

  void test_conditionalExpression_precedence_logicalOrExpression() {
    ConditionalExpression expression = parseExpression("a | b ? y : z");
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.condition);
  }

  void test_conditionalExpression_precedence_nullableType_as() {
    enableNnbd = true;
    Expression expression = parseExpression('x as String ? (x + y) : z');
    expect(expression, isNotNull);
    expect(expression, new isInstanceOf<ConditionalExpression>());
    ConditionalExpression conditional = expression;
    Expression condition = conditional.condition;
    expect(condition, new isInstanceOf<AsExpression>());
    Expression thenExpression = conditional.thenExpression;
    expect(thenExpression, new isInstanceOf<ParenthesizedExpression>());
    Expression elseExpression = conditional.elseExpression;
    expect(elseExpression, new isInstanceOf<SimpleIdentifier>());
  }

  void test_conditionalExpression_precedence_nullableType_is() {
    enableNnbd = true;
    Expression expression = parseExpression('x is String ? (x + y) : z');
    expect(expression, isNotNull);
    expect(expression, new isInstanceOf<ConditionalExpression>());
    ConditionalExpression conditional = expression;
    Expression condition = conditional.condition;
    expect(condition, new isInstanceOf<IsExpression>());
    Expression thenExpression = conditional.thenExpression;
    expect(thenExpression, new isInstanceOf<ParenthesizedExpression>());
    Expression elseExpression = conditional.elseExpression;
    expect(elseExpression, new isInstanceOf<SimpleIdentifier>());
  }

  void test_constructor_initializer_withParenthesizedExpression() {
    CompilationUnit unit = parseCompilationUnit(r'''
class C {
  C() :
    this.a = (b == null ? c : d) {
  }
}''');
    NodeList<CompilationUnitMember> declarations = unit.declarations;
    expect(declarations, hasLength(1));
  }

  void test_equalityExpression_normal() {
    BinaryExpression expression = parseExpression(
        "x == y != z", [ParserErrorCode.EQUALITY_CANNOT_BE_EQUALITY_OPERAND]);
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.leftOperand);
  }

  void test_equalityExpression_precedence_relational_left() {
    BinaryExpression expression = parseExpression("x is y == z");
    EngineTestCase.assertInstanceOf(
        (obj) => obj is IsExpression, IsExpression, expression.leftOperand);
  }

  void test_equalityExpression_precedence_relational_right() {
    BinaryExpression expression = parseExpression("x == y is z");
    EngineTestCase.assertInstanceOf(
        (obj) => obj is IsExpression, IsExpression, expression.rightOperand);
  }

  void test_equalityExpression_super() {
    BinaryExpression expression = parseExpression("super == y != z",
        [ParserErrorCode.EQUALITY_CANNOT_BE_EQUALITY_OPERAND]);
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.leftOperand);
  }

  void test_ifNullExpression() {
    BinaryExpression expression = parseExpression('x ?? y ?? z');
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.leftOperand);
  }

  void test_ifNullExpression_precedence_logicalOr_left() {
    BinaryExpression expression = parseExpression('x || y ?? z');
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.leftOperand);
  }

  void test_ifNullExpression_precedence_logicalOr_right() {
    BinaryExpression expression = parseExpression('x ?? y || z');
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.rightOperand);
  }

  void test_logicalAndExpression() {
    BinaryExpression expression = parseExpression("x && y && z");
    expect(expression.leftOperand, new isInstanceOf<BinaryExpression>());
  }

  void test_logicalAndExpression_precedence_bitwiseOr_left() {
    BinaryExpression expression = parseExpression("x | y < z");
    expect(expression.leftOperand, new isInstanceOf<BinaryExpression>());
  }

  void test_logicalAndExpression_precedence_bitwiseOr_right() {
    BinaryExpression expression = parseExpression("x < y | z");
    expect(expression.rightOperand, new isInstanceOf<BinaryExpression>());
  }

  void test_logicalAndExpression_precedence_nullableType() {
    enableNnbd = true;
    BinaryExpression expression = parseExpression("x is C? && y is D");
    expect(expression.leftOperand, new isInstanceOf<IsExpression>());
    expect(expression.rightOperand, new isInstanceOf<IsExpression>());
  }

  void test_logicalOrExpression() {
    BinaryExpression expression = parseExpression("x || y || z");
    expect(expression.leftOperand, new isInstanceOf<BinaryExpression>());
  }

  void test_logicalOrExpression_precedence_logicalAnd_left() {
    BinaryExpression expression = parseExpression("x && y || z");
    expect(expression.leftOperand, new isInstanceOf<BinaryExpression>());
  }

  void test_logicalOrExpression_precedence_logicalAnd_right() {
    BinaryExpression expression = parseExpression("x || y && z");
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.rightOperand);
  }

  void test_logicalOrExpression_precedence_nullableType() {
    enableNnbd = true;
    BinaryExpression expression = parseExpression("a is X? || (b ? c : d)");
    expect(expression.leftOperand, new isInstanceOf<IsExpression>());
    expect(
        expression.rightOperand, new isInstanceOf<ParenthesizedExpression>());
    expect((expression.rightOperand as ParenthesizedExpression).expression,
        new isInstanceOf<ConditionalExpression>());
  }

  void test_multipleLabels_statement() {
    LabeledStatement statement = parseStatement("a: b: c: return x;");
    expect(statement.labels, hasLength(3));
    EngineTestCase.assertInstanceOf(
        (obj) => obj is ReturnStatement, ReturnStatement, statement.statement);
  }

  void test_multiplicativeExpression_normal() {
    BinaryExpression expression = parseExpression("x * y / z");
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.leftOperand);
  }

  void test_multiplicativeExpression_precedence_unary_left() {
    BinaryExpression expression = parseExpression("-x * y");
    EngineTestCase.assertInstanceOf((obj) => obj is PrefixExpression,
        PrefixExpression, expression.leftOperand);
  }

  void test_multiplicativeExpression_precedence_unary_right() {
    BinaryExpression expression = parseExpression("x * -y");
    EngineTestCase.assertInstanceOf((obj) => obj is PrefixExpression,
        PrefixExpression, expression.rightOperand);
  }

  void test_multiplicativeExpression_super() {
    BinaryExpression expression = parseExpression("super * y / z");
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.leftOperand);
  }

  void test_relationalExpression_precedence_shift_right() {
    IsExpression expression = parseExpression("x << y is z");
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.expression);
  }

  void test_shiftExpression_normal() {
    BinaryExpression expression = parseExpression("x >> 4 << 3");
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.leftOperand);
  }

  void test_shiftExpression_precedence_additive_left() {
    BinaryExpression expression = parseExpression("x + y << z");
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.leftOperand);
  }

  void test_shiftExpression_precedence_additive_right() {
    BinaryExpression expression = parseExpression("x << y + z");
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.rightOperand);
  }

  void test_shiftExpression_super() {
    BinaryExpression expression = parseExpression("super >> 4 << 3");
    EngineTestCase.assertInstanceOf((obj) => obj is BinaryExpression,
        BinaryExpression, expression.leftOperand);
  }

  void test_topLevelFunction_nestedGenericFunction() {
    parseCompilationUnitWithOptions('''
void f() {
  void g<T>() {
  }
}
''');
  }

  void _validate_assignableExpression_arguments_normal_chain_typeArguments(
      String code) {
    PropertyAccess propertyAccess1 = parseExpression(code);
    expect(propertyAccess1.propertyName.name, "f");
    //
    // a<E>(b)<F>(c).d<G>(e)
    //
    MethodInvocation invocation2 = EngineTestCase.assertInstanceOf(
        (obj) => obj is MethodInvocation,
        MethodInvocation,
        propertyAccess1.target);
    expect(invocation2.methodName.name, "d");
    expect(invocation2.typeArguments, isNotNull);
    ArgumentList argumentList2 = invocation2.argumentList;
    expect(argumentList2, isNotNull);
    expect(argumentList2.arguments, hasLength(1));
    //
    // a<E>(b)<F>(c)
    //
    FunctionExpressionInvocation invocation3 = EngineTestCase.assertInstanceOf(
        (obj) => obj is FunctionExpressionInvocation,
        FunctionExpressionInvocation,
        invocation2.target);
    expect(invocation3.typeArguments, isNotNull);
    ArgumentList argumentList3 = invocation3.argumentList;
    expect(argumentList3, isNotNull);
    expect(argumentList3.arguments, hasLength(1));
    //
    // a(b)
    //
    MethodInvocation invocation4 = EngineTestCase.assertInstanceOf(
        (obj) => obj is MethodInvocation,
        MethodInvocation,
        invocation3.function);
    expect(invocation4.methodName.name, "a");
    expect(invocation4.typeArguments, isNotNull);
    ArgumentList argumentList4 = invocation4.argumentList;
    expect(argumentList4, isNotNull);
    expect(argumentList4.arguments, hasLength(1));
  }
}

/**
 * The class `ErrorParserTest` defines parser tests that test the parsing of code to ensure
 * that errors are correctly reported, and in some cases, not reported.
 */
@reflectiveTest
class ErrorParserTest extends ParserTestCase {
  void test_abstractClassMember_constructor() {
    createParser('abstract C.c();');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.ABSTRACT_CLASS_MEMBER]);
  }

  void test_abstractClassMember_field() {
    createParser('abstract C f;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.ABSTRACT_CLASS_MEMBER]);
  }

  void test_abstractClassMember_getter() {
    createParser('abstract get m;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.ABSTRACT_CLASS_MEMBER]);
  }

  void test_abstractClassMember_method() {
    createParser('abstract m();');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.ABSTRACT_CLASS_MEMBER]);
  }

  void test_abstractClassMember_setter() {
    createParser('abstract set m(v);');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.ABSTRACT_CLASS_MEMBER]);
  }

  void test_abstractEnum() {
    parseCompilationUnit(
        "abstract enum E {ONE}", [ParserErrorCode.ABSTRACT_ENUM]);
  }

  void test_abstractTopLevelFunction_function() {
    parseCompilationUnit(
        "abstract f(v) {}", [ParserErrorCode.ABSTRACT_TOP_LEVEL_FUNCTION]);
  }

  void test_abstractTopLevelFunction_getter() {
    parseCompilationUnit(
        "abstract get m {}", [ParserErrorCode.ABSTRACT_TOP_LEVEL_FUNCTION]);
  }

  void test_abstractTopLevelFunction_setter() {
    parseCompilationUnit(
        "abstract set m(v) {}", [ParserErrorCode.ABSTRACT_TOP_LEVEL_FUNCTION]);
  }

  void test_abstractTopLevelVariable() {
    parseCompilationUnit(
        "abstract C f;", [ParserErrorCode.ABSTRACT_TOP_LEVEL_VARIABLE]);
  }

  void test_abstractTypeDef() {
    parseCompilationUnit(
        "abstract typedef F();", [ParserErrorCode.ABSTRACT_TYPEDEF]);
  }

  void test_annotationOnEnumConstant_first() {
    parseCompilationUnit("enum E { @override C }",
        [ParserErrorCode.ANNOTATION_ON_ENUM_CONSTANT]);
  }

  void test_annotationOnEnumConstant_middle() {
    parseCompilationUnit("enum E { C, @override D, E }",
        [ParserErrorCode.ANNOTATION_ON_ENUM_CONSTANT]);
  }

  void test_breakOutsideOfLoop_breakInDoStatement() {
    createParser('do {break;} while (x);');
    DoStatement statement = parser.parseDoStatement();
    expectNotNullIfNoErrors(statement);
    listener.assertNoErrors();
  }

  void test_breakOutsideOfLoop_breakInForStatement() {
    createParser('for (; x;) {break;}');
    Statement statement = parser.parseForStatement();
    expectNotNullIfNoErrors(statement);
    listener.assertNoErrors();
  }

  void test_breakOutsideOfLoop_breakInIfStatement() {
    createParser('if (x) {break;}');
    IfStatement statement = parser.parseIfStatement();
    expectNotNullIfNoErrors(statement);
    listener.assertErrorsWithCodes([ParserErrorCode.BREAK_OUTSIDE_OF_LOOP]);
  }

  void test_breakOutsideOfLoop_breakInSwitchStatement() {
    createParser('switch (x) {case 1: break;}');
    SwitchStatement statement = parser.parseSwitchStatement();
    expectNotNullIfNoErrors(statement);
    listener.assertNoErrors();
  }

  void test_breakOutsideOfLoop_breakInWhileStatement() {
    createParser('while (x) {break;}');
    WhileStatement statement = parser.parseWhileStatement();
    expectNotNullIfNoErrors(statement);
    listener.assertNoErrors();
  }

  void test_breakOutsideOfLoop_functionExpression_inALoop() {
    parseStatement("for(; x;) {() {break;};}");
    assertErrorsWithCodes([ParserErrorCode.BREAK_OUTSIDE_OF_LOOP]);
  }

  void test_breakOutsideOfLoop_functionExpression_withALoop() {
    parseStatement("() {for (; x;) {break;}};");
  }

  void test_classInClass_abstract() {
    parseCompilationUnit(
        "class C { abstract class B {} }", [ParserErrorCode.CLASS_IN_CLASS]);
  }

  void test_classInClass_nonAbstract() {
    parseCompilationUnit(
        "class C { class B {} }", [ParserErrorCode.CLASS_IN_CLASS]);
  }

  void test_classTypeAlias_abstractAfterEq() {
    // This syntax has been removed from the language in favor of
    // "abstract class A = B with C;" (issue 18098).
    createParser('class A = abstract B with C;');
    CompilationUnitMember member = parseFullCompilationUnitMember();
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes(
        [ParserErrorCode.EXPECTED_TOKEN, ParserErrorCode.EXPECTED_TOKEN]);
  }

  void test_colonInPlaceOfIn() {
    parseStatement("for (var x : list) {}");
    assertErrorsWithCodes([ParserErrorCode.COLON_IN_PLACE_OF_IN]);
  }

  void test_constAndCovariant() {
    createParser('covariant const C f;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.CONST_AND_COVARIANT]);
  }

  void test_constAndFinal() {
    createParser('const final int x;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.CONST_AND_FINAL]);
  }

  void test_constAndVar() {
    createParser('const var x;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.CONST_AND_VAR]);
  }

  void test_constClass() {
    parseCompilationUnit("const class C {}", [ParserErrorCode.CONST_CLASS]);
  }

  void test_constConstructorWithBody() {
    createParser('const C() {}');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener
        .assertErrorsWithCodes([ParserErrorCode.CONST_CONSTRUCTOR_WITH_BODY]);
  }

  void test_constEnum() {
    parseCompilationUnit("const enum E {ONE}", [ParserErrorCode.CONST_ENUM]);
  }

  void test_constFactory() {
    createParser('const factory C() {}');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.CONST_FACTORY]);
  }

  void test_constMethod() {
    createParser('const int m() {}');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.CONST_METHOD]);
  }

  void test_constructorWithReturnType() {
    createParser('C C() {}');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener
        .assertErrorsWithCodes([ParserErrorCode.CONSTRUCTOR_WITH_RETURN_TYPE]);
  }

  void test_constructorWithReturnType_var() {
    createParser('var C() {}');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener
        .assertErrorsWithCodes([ParserErrorCode.CONSTRUCTOR_WITH_RETURN_TYPE]);
  }

  void test_constTypedef() {
    parseCompilationUnit("const typedef F();", [ParserErrorCode.CONST_TYPEDEF]);
  }

  void test_continueOutsideOfLoop_continueInDoStatement() {
    createParser('do {continue;} while (x);');
    DoStatement statement = parser.parseDoStatement();
    expectNotNullIfNoErrors(statement);
    listener.assertNoErrors();
  }

  void test_continueOutsideOfLoop_continueInForStatement() {
    createParser('for (; x;) {continue;}');
    Statement statement = parser.parseForStatement();
    expectNotNullIfNoErrors(statement);
    listener.assertNoErrors();
  }

  void test_continueOutsideOfLoop_continueInIfStatement() {
    createParser('if (x) {continue;}');
    IfStatement statement = parser.parseIfStatement();
    expectNotNullIfNoErrors(statement);
    listener.assertErrorsWithCodes([ParserErrorCode.CONTINUE_OUTSIDE_OF_LOOP]);
  }

  void test_continueOutsideOfLoop_continueInSwitchStatement() {
    createParser('switch (x) {case 1: continue a;}');
    SwitchStatement statement = parser.parseSwitchStatement();
    expectNotNullIfNoErrors(statement);
    listener.assertNoErrors();
  }

  void test_continueOutsideOfLoop_continueInWhileStatement() {
    createParser('while (x) {continue;}');
    WhileStatement statement = parser.parseWhileStatement();
    expectNotNullIfNoErrors(statement);
    listener.assertNoErrors();
  }

  void test_continueOutsideOfLoop_functionExpression_inALoop() {
    parseStatement("for(; x;) {() {continue;};}");
    assertErrorsWithCodes([ParserErrorCode.CONTINUE_OUTSIDE_OF_LOOP]);
  }

  void test_continueOutsideOfLoop_functionExpression_withALoop() {
    parseStatement("() {for (; x;) {continue;}};");
  }

  void test_continueWithoutLabelInCase_error() {
    createParser('switch (x) {case 1: continue;}');
    SwitchStatement statement = parser.parseSwitchStatement();
    expectNotNullIfNoErrors(statement);
    listener.assertErrorsWithCodes(
        [ParserErrorCode.CONTINUE_WITHOUT_LABEL_IN_CASE]);
  }

  void test_continueWithoutLabelInCase_noError() {
    createParser('switch (x) {case 1: continue a;}');
    SwitchStatement statement = parser.parseSwitchStatement();
    expectNotNullIfNoErrors(statement);
    listener.assertNoErrors();
  }

  void test_continueWithoutLabelInCase_noError_switchInLoop() {
    createParser('while (a) { switch (b) {default: continue;}}');
    WhileStatement statement = parser.parseWhileStatement();
    expectNotNullIfNoErrors(statement);
    listener.assertNoErrors();
  }

  void test_covariantAfterVar() {
    createParser('var covariant f;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.COVARIANT_AFTER_VAR]);
  }

  void test_covariantAndStatic() {
    createParser('covariant static A f;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.COVARIANT_AND_STATIC]);
  }

  void test_covariantConstructor() {
    createParser('class C { covariant C(); }');
    ClassDeclaration member = parseFullCompilationUnitMember();
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.COVARIANT_CONSTRUCTOR]);
  }

  void test_covariantMember_getter_noReturnType() {
    createParser('static covariant get x => 0;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.COVARIANT_MEMBER]);
  }

  void test_covariantMember_getter_returnType() {
    createParser('static covariant int get x => 0;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.COVARIANT_MEMBER]);
  }

  void test_covariantMember_method() {
    createParser('covariant int m() => 0;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.COVARIANT_MEMBER]);
  }

  void test_covariantTopLevelDeclaration_class() {
    createParser('covariant class C {}');
    ClassDeclaration member = parseFullCompilationUnitMember();
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes(
        [ParserErrorCode.COVARIANT_TOP_LEVEL_DECLARATION]);
  }

  void test_covariantTopLevelDeclaration_enum() {
    createParser('covariant enum E { v }');
    EnumDeclaration member = parseFullCompilationUnitMember();
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes(
        [ParserErrorCode.COVARIANT_TOP_LEVEL_DECLARATION]);
  }

  void test_covariantTopLevelDeclaration_typedef() {
    parseCompilationUnit("covariant typedef F();",
        [ParserErrorCode.COVARIANT_TOP_LEVEL_DECLARATION]);
  }

  void test_defaultValueInFunctionType_named_colon() {
    createParser('int x : 0');
    FormalParameter parameter =
        parser.parseFormalParameter(ParameterKind.NAMED, inFunctionType: true);
    expectNotNullIfNoErrors(parameter);
    listener.assertErrorsWithCodes(
        [ParserErrorCode.DEFAULT_VALUE_IN_FUNCTION_TYPE]);
  }

  void test_defaultValueInFunctionType_named_equal() {
    createParser('int x = 0');
    FormalParameter parameter =
        parser.parseFormalParameter(ParameterKind.NAMED, inFunctionType: true);
    expectNotNullIfNoErrors(parameter);
    listener.assertErrorsWithCodes(
        [ParserErrorCode.DEFAULT_VALUE_IN_FUNCTION_TYPE]);
  }

  void test_defaultValueInFunctionType_positional() {
    createParser('int x = 0');
    FormalParameter parameter = parser
        .parseFormalParameter(ParameterKind.POSITIONAL, inFunctionType: true);
    expectNotNullIfNoErrors(parameter);
    listener.assertErrorsWithCodes(
        [ParserErrorCode.DEFAULT_VALUE_IN_FUNCTION_TYPE]);
  }

  void test_directiveAfterDeclaration_classBeforeDirective() {
    CompilationUnit unit = parseCompilationUnit("class Foo{} library l;",
        [ParserErrorCode.DIRECTIVE_AFTER_DECLARATION]);
    expect(unit, isNotNull);
  }

  void test_directiveAfterDeclaration_classBetweenDirectives() {
    CompilationUnit unit = parseCompilationUnit(
        "library l;\nclass Foo{}\npart 'a.dart';",
        [ParserErrorCode.DIRECTIVE_AFTER_DECLARATION]);
    expect(unit, isNotNull);
  }

  void test_duplicatedModifier_const() {
    createParser('const const m;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.DUPLICATED_MODIFIER]);
  }

  void test_duplicatedModifier_external() {
    createParser('external external f();');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.DUPLICATED_MODIFIER]);
  }

  void test_duplicatedModifier_factory() {
    createParser('factory factory C() {}');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.DUPLICATED_MODIFIER]);
  }

  void test_duplicatedModifier_final() {
    createParser('final final m;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.DUPLICATED_MODIFIER]);
  }

  void test_duplicatedModifier_static() {
    createParser('static static var m;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.DUPLICATED_MODIFIER]);
  }

  void test_duplicatedModifier_var() {
    createParser('var var m;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.DUPLICATED_MODIFIER]);
  }

  void test_duplicateLabelInSwitchStatement() {
    createParser('switch (e) {l1: case 0: break; l1: case 1: break;}');
    SwitchStatement statement = parser.parseSwitchStatement();
    expectNotNullIfNoErrors(statement);
    listener.assertErrorsWithCodes(
        [ParserErrorCode.DUPLICATE_LABEL_IN_SWITCH_STATEMENT]);
  }

  void test_emptyEnumBody() {
    createParser('enum E {}');
    EnumDeclaration declaration = parseFullCompilationUnitMember();
    expectNotNullIfNoErrors(declaration);
    listener.assertErrorsWithCodes([ParserErrorCode.EMPTY_ENUM_BODY]);
  }

  void test_enumInClass() {
    parseCompilationUnit(
        r'''
class Foo {
  enum Bar {
    Bar1, Bar2, Bar3
  }
}
''',
        [ParserErrorCode.ENUM_IN_CLASS]);
  }

  void test_equalityCannotBeEqualityOperand_eq_eq() {
    parseExpression(
        "1 == 2 == 3", [ParserErrorCode.EQUALITY_CANNOT_BE_EQUALITY_OPERAND]);
  }

  void test_equalityCannotBeEqualityOperand_eq_neq() {
    parseExpression(
        "1 == 2 != 3", [ParserErrorCode.EQUALITY_CANNOT_BE_EQUALITY_OPERAND]);
  }

  void test_equalityCannotBeEqualityOperand_neq_eq() {
    parseExpression(
        "1 != 2 == 3", [ParserErrorCode.EQUALITY_CANNOT_BE_EQUALITY_OPERAND]);
  }

  void test_expectedCaseOrDefault() {
    createParser('switch (e) {break;}');
    SwitchStatement statement = parser.parseSwitchStatement();
    expectNotNullIfNoErrors(statement);
    listener.assertErrorsWithCodes([ParserErrorCode.EXPECTED_CASE_OR_DEFAULT]);
  }

  void test_expectedClassMember_inClass_afterType() {
    createParser('heart 2 heart');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.EXPECTED_CLASS_MEMBER]);
  }

  void test_expectedClassMember_inClass_beforeType() {
    createParser('4 score');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.EXPECTED_CLASS_MEMBER]);
  }

  void test_expectedExecutable_inClass_afterVoid() {
    createParser('void 2 void');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.EXPECTED_EXECUTABLE]);
  }

  void test_expectedExecutable_topLevel_afterType() {
    createParser('heart 2 heart');
    CompilationUnitMember member = parseFullCompilationUnitMember();
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.EXPECTED_EXECUTABLE]);
  }

  void test_expectedExecutable_topLevel_afterVoid() {
    createParser('void 2 void');
    CompilationUnitMember member = parseFullCompilationUnitMember();
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.EXPECTED_EXECUTABLE]);
  }

  void test_expectedExecutable_topLevel_beforeType() {
    createParser('4 score');
    CompilationUnitMember member = parseFullCompilationUnitMember();
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.EXPECTED_EXECUTABLE]);
  }

  void test_expectedExecutable_topLevel_eof() {
    createParser('x');
    CompilationUnitMember member = parseFullCompilationUnitMember();
    expectNotNullIfNoErrors(member);
    listener.assertErrors(
        [new AnalysisError(null, 0, 1, ParserErrorCode.EXPECTED_EXECUTABLE)]);
  }

  void test_expectedInterpolationIdentifier() {
    createParser("'\$x\$'");
    StringLiteral literal = parser.parseStringLiteral();
    expectNotNullIfNoErrors(literal);
    listener.assertErrorsWithCodes([ParserErrorCode.MISSING_IDENTIFIER]);
  }

  void test_expectedInterpolationIdentifier_emptyString() {
    // The scanner inserts an empty string token between the two $'s; we need to
    // make sure that the MISSING_IDENTIFIER error that is generated has a
    // nonzero width so that it will show up in the editor UI.
    createParser("'\$\$foo'");
    StringLiteral literal = parser.parseStringLiteral();
    expectNotNullIfNoErrors(literal);
    listener.assertErrors(
        [new AnalysisError(null, 2, 1, ParserErrorCode.MISSING_IDENTIFIER)]);
  }

  @failingTest
  void test_expectedListOrMapLiteral() {
    // It isn't clear that this test can ever pass. The parser is currently
    // create a synthetic list literal in this case, but isSynthetic() isn't
    // overridden for ListLiteral. The problem is that the synthetic list
    // literals that are being created are not always zero length (because they
    // could have type parameters), which violates the contract of
    // isSynthetic().
    TypedLiteral literal = parseListOrMapLiteral(null, '1');
    expectNotNullIfNoErrors(literal);
    listener
        .assertErrorsWithCodes([ParserErrorCode.EXPECTED_LIST_OR_MAP_LITERAL]);
    expect(literal.isSynthetic, isTrue);
  }

  void test_expectedStringLiteral() {
    createParser('1');
    StringLiteral literal = parser.parseStringLiteral();
    expectNotNullIfNoErrors(literal);
    listener.assertErrorsWithCodes([ParserErrorCode.EXPECTED_STRING_LITERAL]);
    expect(literal.isSynthetic, isTrue);
  }

  void test_expectedToken_commaMissingInArgumentList() {
    createParser('(x, y z)');
    ArgumentList list = parser.parseArgumentList();
    expectNotNullIfNoErrors(list);
    listener.assertErrorsWithCodes([ParserErrorCode.EXPECTED_TOKEN]);
  }

  void test_expectedToken_parseStatement_afterVoid() {
    parseStatement("void}");
    assertErrorsWithCodes(
        [ParserErrorCode.EXPECTED_TOKEN, ParserErrorCode.MISSING_IDENTIFIER]);
  }

  void test_expectedToken_semicolonMissingAfterExport() {
    CompilationUnit unit = parseCompilationUnit(
        "export '' class A {}", [ParserErrorCode.EXPECTED_TOKEN]);
    ExportDirective directive = unit.directives[0] as ExportDirective;
    Token semicolon = directive.semicolon;
    expect(semicolon, isNotNull);
    expect(semicolon.isSynthetic, isTrue);
  }

  void test_expectedToken_semicolonMissingAfterExpression() {
    parseStatement("x");
    assertErrorsWithCodes([ParserErrorCode.EXPECTED_TOKEN]);
  }

  void test_expectedToken_semicolonMissingAfterImport() {
    CompilationUnit unit = parseCompilationUnit(
        "import '' class A {}", [ParserErrorCode.EXPECTED_TOKEN]);
    ImportDirective directive = unit.directives[0] as ImportDirective;
    Token semicolon = directive.semicolon;
    expect(semicolon, isNotNull);
    expect(semicolon.isSynthetic, isTrue);
  }

  void test_expectedToken_whileMissingInDoStatement() {
    parseStatement("do {} (x);");
    assertErrorsWithCodes([ParserErrorCode.EXPECTED_TOKEN]);
  }

  void test_expectedTypeName_as() {
    parseExpression("x as", [ParserErrorCode.EXPECTED_TYPE_NAME]);
  }

  void test_expectedTypeName_as_void() {
    parseExpression("x as void)", [ParserErrorCode.EXPECTED_TYPE_NAME]);
  }

  void test_expectedTypeName_is() {
    parseExpression("x is", [ParserErrorCode.EXPECTED_TYPE_NAME]);
  }

  void test_expectedTypeName_is_void() {
    parseExpression("x is void)", [ParserErrorCode.EXPECTED_TYPE_NAME]);
  }

  void test_exportDirectiveAfterPartDirective() {
    parseCompilationUnit("part 'a.dart'; export 'b.dart';",
        [ParserErrorCode.EXPORT_DIRECTIVE_AFTER_PART_DIRECTIVE]);
  }

  void test_externalAfterConst() {
    createParser('const external C();');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.EXTERNAL_AFTER_CONST]);
  }

  void test_externalAfterFactory() {
    createParser('factory external C();');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.EXTERNAL_AFTER_FACTORY]);
  }

  void test_externalAfterStatic() {
    createParser('static external int m();');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.EXTERNAL_AFTER_STATIC]);
  }

  void test_externalClass() {
    parseCompilationUnit(
        "external class C {}", [ParserErrorCode.EXTERNAL_CLASS]);
  }

  void test_externalConstructorWithBody_factory() {
    createParser('external factory C() {}');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes(
        [ParserErrorCode.EXTERNAL_CONSTRUCTOR_WITH_BODY]);
  }

  void test_externalConstructorWithBody_named() {
    createParser('external C.c() {}');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes(
        [ParserErrorCode.EXTERNAL_CONSTRUCTOR_WITH_BODY]);
  }

  void test_externalEnum() {
    parseCompilationUnit(
        "external enum E {ONE}", [ParserErrorCode.EXTERNAL_ENUM]);
  }

  void test_externalField_const() {
    createParser('external const A f;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.EXTERNAL_FIELD]);
  }

  void test_externalField_final() {
    createParser('external final A f;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.EXTERNAL_FIELD]);
  }

  void test_externalField_static() {
    createParser('external static A f;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.EXTERNAL_FIELD]);
  }

  void test_externalField_typed() {
    createParser('external A f;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.EXTERNAL_FIELD]);
  }

  void test_externalField_untyped() {
    createParser('external var f;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.EXTERNAL_FIELD]);
  }

  void test_externalGetterWithBody() {
    createParser('external int get x {}');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.EXTERNAL_GETTER_WITH_BODY]);
  }

  void test_externalMethodWithBody() {
    createParser('external m() {}');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.EXTERNAL_METHOD_WITH_BODY]);
  }

  void test_externalOperatorWithBody() {
    createParser('external operator +(int value) {}');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener
        .assertErrorsWithCodes([ParserErrorCode.EXTERNAL_OPERATOR_WITH_BODY]);
  }

  void test_externalSetterWithBody() {
    createParser('external set x(int value) {}');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.EXTERNAL_SETTER_WITH_BODY]);
  }

  void test_externalTypedef() {
    parseCompilationUnit(
        "external typedef F();", [ParserErrorCode.EXTERNAL_TYPEDEF]);
  }

  void test_extraCommaInParameterList() {
    createParser('(int a, , int b)');
    FormalParameterList list = parser.parseFormalParameterList();
    expectNotNullIfNoErrors(list);
    listener.assertErrorsWithCodes(
        [ParserErrorCode.MISSING_IDENTIFIER, ParserErrorCode.EXPECTED_TOKEN]);
  }

  void test_extraCommaTrailingNamedParameterGroup() {
    createParser('({int b},)');
    FormalParameterList list = parser.parseFormalParameterList();
    expectNotNullIfNoErrors(list);
    listener.assertErrorsWithCodes([
      ParserErrorCode.MISSING_IDENTIFIER,
      ParserErrorCode.NORMAL_BEFORE_OPTIONAL_PARAMETERS
    ]);
  }

  void test_extraCommaTrailingPositionalParameterGroup() {
    createParser('([int b],)');
    FormalParameterList list = parser.parseFormalParameterList();
    expectNotNullIfNoErrors(list);
    listener.assertErrorsWithCodes([
      ParserErrorCode.MISSING_IDENTIFIER,
      ParserErrorCode.NORMAL_BEFORE_OPTIONAL_PARAMETERS
    ]);
  }

  void test_extraTrailingCommaInParameterList() {
    createParser('(a,,)');
    FormalParameterList list = parser.parseFormalParameterList();
    expectNotNullIfNoErrors(list);
    listener.assertErrorsWithCodes([ParserErrorCode.MISSING_IDENTIFIER]);
  }

  void test_factoryTopLevelDeclaration_class() {
    parseCompilationUnit(
        "factory class C {}", [ParserErrorCode.FACTORY_TOP_LEVEL_DECLARATION]);
  }

  void test_factoryTopLevelDeclaration_enum() {
    parseCompilationUnit("factory enum E { v }",
        [ParserErrorCode.FACTORY_TOP_LEVEL_DECLARATION]);
  }

  void test_factoryTopLevelDeclaration_typedef() {
    parseCompilationUnit("factory typedef F();",
        [ParserErrorCode.FACTORY_TOP_LEVEL_DECLARATION]);
  }

  void test_factoryWithInitializers() {
    createParser('factory C() : x = 3 {}');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.FACTORY_WITH_INITIALIZERS]);
  }

  void test_factoryWithoutBody() {
    createParser('factory C();');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.FACTORY_WITHOUT_BODY]);
  }

  void test_fieldInitializerOutsideConstructor() {
    createParser('void m(this.x);');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes(
        [ParserErrorCode.FIELD_INITIALIZER_OUTSIDE_CONSTRUCTOR]);
  }

  void test_finalAndCovariant() {
    createParser('covariant final f;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.FINAL_AND_COVARIANT]);
  }

  void test_finalAndVar() {
    createParser('final var x;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.FINAL_AND_VAR]);
  }

  void test_finalClass() {
    parseCompilationUnit("final class C {}", [ParserErrorCode.FINAL_CLASS]);
  }

  void test_finalConstructor() {
    createParser('final C() {}');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.FINAL_CONSTRUCTOR]);
  }

  void test_finalEnum() {
    parseCompilationUnit("final enum E {ONE}", [ParserErrorCode.FINAL_ENUM]);
  }

  void test_finalMethod() {
    createParser('final int m() {}');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.FINAL_METHOD]);
  }

  void test_finalTypedef() {
    parseCompilationUnit("final typedef F();", [ParserErrorCode.FINAL_TYPEDEF]);
  }

  void test_functionTypedParameter_const() {
    parseCompilationUnit(
        "void f(const x()) {}", [ParserErrorCode.FUNCTION_TYPED_PARAMETER_VAR]);
  }

  void test_functionTypedParameter_final() {
    parseCompilationUnit(
        "void f(final x()) {}", [ParserErrorCode.FUNCTION_TYPED_PARAMETER_VAR]);
  }

  void test_functionTypedParameter_var() {
    parseCompilationUnit(
        "void f(var x()) {}", [ParserErrorCode.FUNCTION_TYPED_PARAMETER_VAR]);
  }

  void test_getterInFunction_block_noReturnType() {
    FunctionDeclarationStatement statement =
        parseStatement("get x { return _x; }");
    assertErrorsWithCodes([ParserErrorCode.GETTER_IN_FUNCTION]);
    expect(statement.functionDeclaration.functionExpression.parameters, isNull);
  }

  void test_getterInFunction_block_returnType() {
    parseStatement("int get x { return _x; }");
    assertErrorsWithCodes([ParserErrorCode.GETTER_IN_FUNCTION]);
  }

  void test_getterInFunction_expression_noReturnType() {
    parseStatement("get x => _x;");
    assertErrorsWithCodes([ParserErrorCode.GETTER_IN_FUNCTION]);
  }

  void test_getterInFunction_expression_returnType() {
    parseStatement("int get x => _x;");
    assertErrorsWithCodes([ParserErrorCode.GETTER_IN_FUNCTION]);
  }

  void test_getterWithParameters() {
    createParser('int get x() {}');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.GETTER_WITH_PARAMETERS]);
  }

  void test_illegalAssignmentToNonAssignable_postfix_minusMinus_literal() {
    parseExpression(
        "0--", [ParserErrorCode.ILLEGAL_ASSIGNMENT_TO_NON_ASSIGNABLE]);
  }

  void test_illegalAssignmentToNonAssignable_postfix_plusPlus_literal() {
    parseExpression(
        "0++", [ParserErrorCode.ILLEGAL_ASSIGNMENT_TO_NON_ASSIGNABLE]);
  }

  void test_illegalAssignmentToNonAssignable_postfix_plusPlus_parenthesized() {
    parseExpression(
        "(x)++", [ParserErrorCode.ILLEGAL_ASSIGNMENT_TO_NON_ASSIGNABLE]);
  }

  void test_illegalAssignmentToNonAssignable_primarySelectorPostfix() {
    parseExpression(
        "x(y)(z)++", [ParserErrorCode.ILLEGAL_ASSIGNMENT_TO_NON_ASSIGNABLE]);
  }

  void test_illegalAssignmentToNonAssignable_superAssigned() {
    // TODO(brianwilkerson) When the test
    // test_illegalAssignmentToNonAssignable_superAssigned_failing starts to pass,
    // remove this test (there should only be one error generated, but we're
    // keeping this test until that time so that we can catch other forms of
    // regressions).
    parseExpression("super = x;", [
      ParserErrorCode.MISSING_ASSIGNABLE_SELECTOR,
      ParserErrorCode.ILLEGAL_ASSIGNMENT_TO_NON_ASSIGNABLE
    ]);
  }

  @failingTest
  void test_illegalAssignmentToNonAssignable_superAssigned_failing() {
    // TODO(brianwilkerson) When this test starts to pass, remove the test
    // test_illegalAssignmentToNonAssignable_superAssigned.
    parseExpression(
        "super = x;", [ParserErrorCode.ILLEGAL_ASSIGNMENT_TO_NON_ASSIGNABLE]);
  }

  void test_implementsBeforeExtends() {
    parseCompilationUnit("class A implements B extends C {}",
        [ParserErrorCode.IMPLEMENTS_BEFORE_EXTENDS]);
  }

  void test_implementsBeforeWith() {
    parseCompilationUnit("class A extends B implements C with D {}",
        [ParserErrorCode.IMPLEMENTS_BEFORE_WITH]);
  }

  void test_importDirectiveAfterPartDirective() {
    parseCompilationUnit("part 'a.dart'; import 'b.dart';",
        [ParserErrorCode.IMPORT_DIRECTIVE_AFTER_PART_DIRECTIVE]);
  }

  void test_initializedVariableInForEach() {
    createParser('for (int a = 0 in foo) {}');
    Statement statement = parser.parseForStatement();
    expectNotNullIfNoErrors(statement);
    listener.assertErrorsWithCodes(
        [ParserErrorCode.INITIALIZED_VARIABLE_IN_FOR_EACH]);
  }

  void test_invalidAwaitInFor() {
    createParser('await for (; ;) {}');
    Statement statement = parser.parseForStatement();
    expectNotNullIfNoErrors(statement);
    listener.assertErrorsWithCodes([ParserErrorCode.INVALID_AWAIT_IN_FOR]);
  }

  void test_invalidCodePoint() {
    createParser("'\\u{110000}'");
    StringLiteral literal = parser.parseStringLiteral();
    expectNotNullIfNoErrors(literal);
    listener.assertErrorsWithCodes([ParserErrorCode.INVALID_CODE_POINT]);
  }

  @failingTest
  void test_invalidCommentReference__new_nonIdentifier() {
    // This test fails because the method parseCommentReference returns null.
    createParser('');
    CommentReference reference = parser.parseCommentReference('new 42', 0);
    expectNotNullIfNoErrors(reference);
    listener.assertErrorsWithCodes([ParserErrorCode.INVALID_COMMENT_REFERENCE]);
  }

  @failingTest
  void test_invalidCommentReference__new_tooMuch() {
    createParser('');
    CommentReference reference = parser.parseCommentReference('new a.b.c.d', 0);
    expectNotNullIfNoErrors(reference);
    listener.assertErrorsWithCodes([ParserErrorCode.INVALID_COMMENT_REFERENCE]);
  }

  @failingTest
  void test_invalidCommentReference__nonNew_nonIdentifier() {
    // This test fails because the method parseCommentReference returns null.
    createParser('');
    CommentReference reference = parser.parseCommentReference('42', 0);
    expectNotNullIfNoErrors(reference);
    listener.assertErrorsWithCodes([ParserErrorCode.INVALID_COMMENT_REFERENCE]);
  }

  @failingTest
  void test_invalidCommentReference__nonNew_tooMuch() {
    createParser('');
    CommentReference reference = parser.parseCommentReference('a.b.c.d', 0);
    expectNotNullIfNoErrors(reference);
    listener.assertErrorsWithCodes([ParserErrorCode.INVALID_COMMENT_REFERENCE]);
  }

  void test_invalidConstructorName_with() {
    createParser("C.with();");
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.INVALID_CONSTRUCTOR_NAME]);
  }

  void test_invalidHexEscape_invalidDigit() {
    createParser("'\\x0 a'");
    StringLiteral literal = parser.parseStringLiteral();
    expectNotNullIfNoErrors(literal);
    listener.assertErrorsWithCodes([ParserErrorCode.INVALID_HEX_ESCAPE]);
  }

  void test_invalidHexEscape_tooFewDigits() {
    createParser("'\\x0'");
    StringLiteral literal = parser.parseStringLiteral();
    expectNotNullIfNoErrors(literal);
    listener.assertErrorsWithCodes([ParserErrorCode.INVALID_HEX_ESCAPE]);
  }

  void test_invalidInterpolationIdentifier_startWithDigit() {
    createParser("'\$1'");
    StringLiteral literal = parser.parseStringLiteral();
    expectNotNullIfNoErrors(literal);
    listener.assertErrorsWithCodes([ParserErrorCode.MISSING_IDENTIFIER]);
  }

  void test_invalidLiteralInConfiguration() {
    createParser("if (a == 'x \$y z') 'a.dart'");
    Configuration configuration = parser.parseConfiguration();
    expectNotNullIfNoErrors(configuration);
    listener.assertErrorsWithCodes(
        [ParserErrorCode.INVALID_LITERAL_IN_CONFIGURATION]);
  }

  void test_invalidOperator() {
    createParser('void operator ===(x) {}');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrorsWithCodes([ParserErrorCode.INVALID_OPERATOR]);
  }

  void test_invalidOperatorAfterSuper_assignableExpression() {
    Expression expression = parseAssignableExpression('super?.v', false);
    expectNotNullIfNoErrors(expression);
    listener
        .assertErrorsWithCodes([ParserErrorCode.INVALID_OPERATOR_FOR_SUPER]);
  }

  void test_invalidOperatorAfterSuper_primaryExpression() {
    Expression expression = parsePrimaryExpression('super?.v');
    expectNotNullIfNoErrors(expression);
    listener
        .assertErrorsWithCodes([ParserErrorCode.INVALID_OPERATOR_FOR_SUPER]);
  }

  void test_invalidOperatorForSuper() {
    createParser('++super');
    Expression expression = parser.parseUnaryExpression();
    expectNotNullIfNoErrors(expression);
    listener
        .assertErrorsWithCodes([ParserErrorCode.INVALID_OPERATOR_FOR_SUPER]);
  }

  void test_invalidStarAfterAsync() {
    createParser('async* => 0;');
    FunctionBody functionBody = parser.parseFunctionBody(false, null, false);
    expectNotNullIfNoErrors(functionBody);
    listener.assertErrorsWithCodes([ParserErrorCode.INVALID_STAR_AFTER_ASYNC]);
  }

  void test_invalidSync() {
    createParser('sync* => 0;');
    FunctionBody functionBody = parser.parseFunctionBody(false, null, false);
    expectNotNullIfNoErrors(functionBody);
    listener.assertErrorsWithCodes([ParserErrorCode.INVALID_SYNC]);
  }

  void test_invalidUnicodeEscape_incomplete_noDigits() {
    Expression expression = parseStringLiteral("'\\u{'");
    expectNotNullIfNoErrors(expression);
    listener.assertErrorsWithCodes([ParserErrorCode.INVALID_UNICODE_ESCAPE]);
  }

  void test_invalidUnicodeEscape_incomplete_someDigits() {
    Expression expression = parseStringLiteral("'\\u{0A'");