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.

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/error/hint_codes.dart';
import 'package:analyzer/src/dart/scanner/reader.dart';
import 'package:analyzer/src/dart/scanner/scanner.dart';
import 'package:analyzer/src/error/codes.dart';
import 'package:analyzer/src/generated/parser.dart';
import 'package:analyzer/src/generated/source.dart';
import 'package:analyzer/src/generated/testing/token_factory.dart';
import 'package:analyzer/src/generated/utilities_dart.dart';
import 'package:front_end/src/fasta/scanner/abstract_scanner.dart';
import 'package:front_end/src/scanner/scanner.dart' as fe;
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 {
  bool get allowNativeClause;

  void set allowNativeClause(bool value);

  void set enableGenericMethodComments(bool value);

  void set enableLazyAssignmentOperators(bool value);

  void set enableNnbd(bool value);

  /**
   * Set a flag indicating whether the parser should parse instance creation
   * expressions that lack either the `new` or `const` keyword.
   */
  void set enableOptionalNewAndConst(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);

  /**
   * The error listener to which scanner and parser errors will be reported.
   *
   * This field is typically initialized by invoking [createParser].
   */
  GatheringErrorListener get listener;

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

  /**
   * Flag indicating whether the fasta parser is being used.
   */
  bool get usingFastaParser;

  /**
   * Flag indicating whether the fasta scanner is being used.
   */
  bool get usingFastaScanner;

  /**
   * Assert that the number and codes of errors occurred during parsing is the
   * same as 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.
   *
   * [expectedEndOffset] is the expected offset of the next token to be parsed
   * after the parser has finished parsing,
   * or `null` (the default) if EOF is expected.
   * In general, the analyzer tests do not assert that the last token is EOF,
   * but the fasta parser adapter tests do assert this.
   * For any analyzer test where the last token is not EOF, set this value.
   * It is ignored when not using the fasta parser.
   */
  void createParser(String content, {int expectedEndOffset});

  ExpectedError expectedError(ErrorCode code, int offset, int length);

  void expectNotNullIfNoErrors(Object result);

  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> codes, List<ExpectedError> errors});

  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> codes,
      List<ExpectedError> errors,
      int expectedEndOffset});

  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>[],
      List<ExpectedError> errors});

  /**
   * 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,
      List<ErrorCode> errorCodes: const <ErrorCode>[]});

  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, int expectedEndOffset});

  Expression parseStringLiteral(String code);

  SymbolLiteral parseSymbolLiteral(String code);

  Expression parseThrowExpression(String code);

  Expression parseThrowExpressionWithoutCascade(String code);

  PrefixExpression parseUnaryExpression(String code);

  VariableDeclarationList parseVariableDeclarationList(String source);
}

/**
 * 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_generic() {
    createParser('List<List<N>> _allComponents = new List<List<N>>();');
    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);
    TypeName type = list.type;
    expect(type.name.name, 'List');
    NodeList typeArguments = type.typeArguments.arguments;
    expect(typeArguments, hasLength(1));
    TypeName type2 = typeArguments[0];
    expect(type2.name.name, 'List');
    NodeList typeArguments2 = type2.typeArguments.arguments;
    expect(typeArguments2, hasLength(1));
    TypeName type3 = typeArguments2[0];
    expect(type3.name.name, 'N');
    NodeList<VariableDeclaration> variables = list.variables;
    expect(variables, hasLength(1));
    VariableDeclaration variable = variables[0];
    expect(variable.name, isNotNull);
  }

  void test_parseClassMember_field_gftType_gftReturnType() {
    createParser('''
Function(int) Function(String) v;
''');
    ClassMember member = parser.parseClassMember('C');
    assertNoErrors();
    expect(member, new isInstanceOf<FieldDeclaration>());
    VariableDeclarationList fields = (member as FieldDeclaration).fields;
    expect(fields.type, new isInstanceOf<GenericFunctionType>());
  }

  void test_parseClassMember_field_gftType_noReturnType() {
    createParser('''
Function(int, String) v;
''');
    ClassMember member = parser.parseClassMember('C');
    assertNoErrors();
    expect(member, new isInstanceOf<FieldDeclaration>());
    VariableDeclarationList fields = (member as FieldDeclaration).fields;
    expect(fields.type, new isInstanceOf<GenericFunctionType>());
  }

  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);
    if (usingFastaParser) {
      assertNoErrors();
    } else {
      assertErrorsWithCodes([HintCode.GENERIC_METHOD_COMMENT]);
    }
    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_parameterType() {
    enableGenericMethodComments = true;
    createParser('m/*<T>*/(dynamic /*=T*/ p) => null;');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    if (usingFastaParser) {
      assertNoErrors();
    } else {
      assertErrorsWithCodes(
          [HintCode.GENERIC_METHOD_COMMENT, HintCode.GENERIC_METHOD_COMMENT]);
    }
    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);

    FormalParameterList parameters = method.parameters;
    expect(parameters, isNotNull);
    expect(parameters.parameters, hasLength(1));
    var parameter = parameters.parameters[0] as SimpleFormalParameter;
    var parameterType = parameter.type as TypeName;
    expect(parameterType.name.name, 'T');

    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);
    if (usingFastaParser) {
      assertNoErrors();
    } else {
      assertErrorsWithCodes(
          [HintCode.GENERIC_METHOD_COMMENT, HintCode.GENERIC_METHOD_COMMENT]);
    }
    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.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);
    if (usingFastaParser) {
      assertNoErrors();
    } else {
      assertErrorsWithCodes(
          [HintCode.GENERIC_METHOD_COMMENT, HintCode.GENERIC_METHOD_COMMENT]);
    }
    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_returnType_complex() {
    enableGenericMethodComments = true;
    createParser('dynamic /*=Map<int, T>*/ m/*<T>*/() => null;');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    if (usingFastaParser) {
      assertNoErrors();
    } else {
      assertErrorsWithCodes(
          [HintCode.GENERIC_METHOD_COMMENT, HintCode.GENERIC_METHOD_COMMENT]);
    }
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    expect(method.documentationComment, isNull);
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNull);
    expect(method.propertyKeyword, isNull);

    {
      var returnType = method.returnType as TypeName;
      expect(returnType, isNotNull);
      expect(returnType.name.name, 'Map');

      List<TypeAnnotation> typeArguments = returnType.typeArguments.arguments;
      expect(typeArguments, hasLength(2));
      expect((typeArguments[0] as TypeName).name.name, 'int');
      expect((typeArguments[1] 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_void() {
    enableGenericMethodComments = true;
    createParser('void m/*<T>*/() {}');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    if (usingFastaParser) {
      assertNoErrors();
    } else {
      assertErrorsWithCodes([HintCode.GENERIC_METHOD_COMMENT]);
    }
    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_parameterType() {
    createParser('m<T>(T p) => null;');
    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);

    FormalParameterList parameters = method.parameters;
    expect(parameters, isNotNull);
    expect(parameters.parameters, hasLength(1));
    var parameter = parameters.parameters[0] as SimpleFormalParameter;
    var parameterType = parameter.type as TypeName;
    expect(parameterType.name.name, 'T');

    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_returnType_bound() {
    createParser('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_returnType_complex() {
    createParser('Map<int, T> m<T>() => null;');
    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);

    {
      var returnType = method.returnType as TypeName;
      expect(returnType, isNotNull);
      expect(returnType.name.name, 'Map');

      List<TypeAnnotation> typeArguments = returnType.typeArguments.arguments;
      expect(typeArguments, hasLength(2));
      expect((typeArguments[0] as TypeName).name.name, 'int');
      expect((typeArguments[1] 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_returnType_static() {
    createParser('static 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, isNotNull);
    expect(method.propertyKeyword, isNull);
    expect(method.returnType, isNotNull);
    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_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_gftReturnType_noReturnType() {
    createParser('''
Function<A>(core.List<core.int> x) m() => null;
''');
    ClassMember member = parser.parseClassMember('C');
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    expect((member as MethodDeclaration).body,
        new isInstanceOf<ExpressionFunctionBody>());
  }

  void test_parseClassMember_method_gftReturnType_voidReturnType() {
    createParser('''
void Function<A>(core.List<core.int> x) m() => null;
''');
    ClassMember member = parser.parseClassMember('C');
    assertNoErrors();
    expect(member, new isInstanceOf<MethodDeclaration>());
    expect((member as MethodDeclaration).body,
        new isInstanceOf<ExpressionFunctionBody>());
  }

  void test_parseClassMember_method_native_allowed() {
    allowNativeClause = true;
    _parseClassMember_method_native();
    assertNoErrors();
  }

  void test_parseClassMember_method_native_missing_literal_allowed() {
    allowNativeClause = true;
    _parseClassMember_method_native_missing_literal();
    assertNoErrors();
  }

  void test_parseClassMember_method_native_missing_literal_not_allowed() {
    allowNativeClause = false;
    _parseClassMember_method_native_missing_literal();
    if (usingFastaParser) {
      listener.assertErrors([
        expectedError(ParserErrorCode.NATIVE_CLAUSE_SHOULD_BE_ANNOTATION, 4, 6),
      ]);
    } else {
      assertNoErrors();
    }
  }

  void test_parseClassMember_method_native_not_allowed() {
    allowNativeClause = false;
    _parseClassMember_method_native();
    if (usingFastaParser) {
      listener.assertErrors([
        expectedError(ParserErrorCode.NATIVE_CLAUSE_SHOULD_BE_ANNOTATION, 4, 6),
      ]);
    } else {
      assertNoErrors();
    }
  }

  void test_parseClassMember_method_native_with_body_allowed() {
    allowNativeClause = true;
    _parseClassMember_method_native_with_body();
    if (usingFastaParser) {
      // TODO(brianwilkerson) Convert codes to errors when highlighting is fixed.
      assertErrorsWithCodes([
        ParserErrorCode.EXTERNAL_METHOD_WITH_BODY,
      ]);
//      listener.assertErrors([
//        expectedError(ParserErrorCode.EXTERNAL_METHOD_WITH_BODY, 17, 2),
//      ]);
    } else {
      assertErrorsWithCodes([
        ParserErrorCode.EXPECTED_TOKEN,
      ]);
    }
  }

  void test_parseClassMember_method_native_with_body_not_allowed() {
    allowNativeClause = false;
    _parseClassMember_method_native_with_body();
    if (usingFastaParser) {
      // TODO(brianwilkerson) Convert codes to errors when highlighting is fixed.
      assertErrorsWithCodes([
        ParserErrorCode.NATIVE_CLAUSE_SHOULD_BE_ANNOTATION,
        ParserErrorCode.EXTERNAL_METHOD_WITH_BODY,
      ]);
//      listener.assertErrors([
//        expectedError(ParserErrorCode.NATIVE_CLAUSE_SHOULD_BE_ANNOTATION, 4, 6),
//        expectedError(ParserErrorCode.EXTERNAL_METHOD_WITH_BODY, 17, 2),
//      ]);
    } else {
      assertErrorsWithCodes([
        ParserErrorCode.EXPECTED_TOKEN,
      ]);
    }
  }

  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_static_generic_comment_returnType() {
    enableGenericMethodComments = true;
    createParser('static /*=T*/ m/*<T>*/() {}');
    ClassMember member = parser.parseClassMember('C');
    expect(member, isNotNull);
    if (usingFastaParser) {
      assertNoErrors();
    } else {
      assertErrorsWithCodes(
          [HintCode.GENERIC_METHOD_COMMENT, HintCode.GENERIC_METHOD_COMMENT]);
    }
    expect(member, new isInstanceOf<MethodDeclaration>());
    MethodDeclaration method = member;
    expect(method.documentationComment, isNull);
    expect(method.externalKeyword, isNull);
    expect(method.modifierKeyword, isNotNull);
    expect(method.propertyKeyword, isNull);
    expect(method.returnType, isNotNull);
    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_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_operator_lessThan() {
    createParser('bool operator <(other) => false;');
    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.name, '<');
    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() {
    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_factory_const_external() {
    // Although the spec does not allow external const factory,
    // there are several instances of this in the Dart SDK.
    // For example `external const factory bool.fromEnvironment(...)`.
    createParser('external const factory C();');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertNoErrors();
  }

  void test_parseConstructor_factory_named() {
    createParser('factory C.foo() => null;');
    var constructor = parser.parseClassMember('C') as ConstructorDeclaration;
    assertNoErrors();
    expect(constructor, isNotNull);
    expect(constructor.externalKeyword, isNull);
    expect(constructor.constKeyword, isNull);
    expect(constructor.factoryKeyword, isNotNull);
    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<ExpressionFunctionBody>());
  }

  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() {
    var initializer = parseConstructorInitializer('this.a = b')
        as ConstructorFieldInitializer;
    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() {
    var initializer =
        parseConstructorInitializer('a = b') as ConstructorFieldInitializer;
    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);
  }

  void _parseClassMember_method_native() {
    createParser('m() native "str";');
    var method = parser.parseClassMember('C') as MethodDeclaration;
    var body = method.body as NativeFunctionBody;
    expect(body.nativeKeyword, isNotNull);
    expect(body.stringLiteral, isNotNull);
    expect(body.stringLiteral?.stringValue, "str");
    expect(body.semicolon, isNotNull);
  }

  void _parseClassMember_method_native_missing_literal() {
    createParser('m() native;');
    var method = parser.parseClassMember('C') as MethodDeclaration;
    var body = method.body as NativeFunctionBody;
    expect(body.nativeKeyword, isNotNull);
    expect(body.stringLiteral, isNull);
    expect(body.semicolon, isNotNull);
  }

  void _parseClassMember_method_native_with_body() {
    createParser('m() native "str" {}');
    parser.parseClassMember('C') as MethodDeclaration;
  }
}

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

/**
 * 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",
        usingFastaParser
            ? []
            : [
                HintCode.GENERIC_METHOD_COMMENT,
                HintCode.GENERIC_METHOD_COMMENT,
                HintCode.GENERIC_METHOD_COMMENT
              ]);
  }

  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() {
    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() {
    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",
        codes: [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",
        codes: [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_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_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() {
    parseCompilationUnit('''
void f() {
  void g<T>() {
  }
}
''');
  }

  void _validate_assignableExpression_arguments_normal_chain_typeArguments(
      String code,
      [List<ErrorCode> errorCodes = const <ErrorCode>[]]) {
    PropertyAccess propertyAccess1 = parseExpression(code, codes: errorCodes);
    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 with ErrorParserTestMixin {
  void test_missingIdentifier_number() {
    createParser('1');
    SimpleIdentifier expression = parser.parseSimpleIdentifier();
    expectNotNullIfNoErrors(expression);
    listener.assertErrors(
        [expectedError(ParserErrorCode.MISSING_IDENTIFIER, 0, 1)]);
    expect(expression.isSynthetic, isTrue);
  }

  void test_nullableTypeInExtends() {
    enableNnbd = true;
    createParser('extends B?');
    ExtendsClause clause = parser.parseExtendsClause();
    expectNotNullIfNoErrors(clause);
    listener.assertErrors(
        [expectedError(ParserErrorCode.NULLABLE_TYPE_IN_EXTENDS, 9, 1)]);
  }

  void test_nullableTypeInImplements() {
    enableNnbd = true;
    createParser('implements I?');
    ImplementsClause clause = parser.parseImplementsClause();
    expectNotNullIfNoErrors(clause);
    listener.assertErrors(
        [expectedError(ParserErrorCode.NULLABLE_TYPE_IN_IMPLEMENTS, 12, 1)]);
  }

  void test_nullableTypeInWith() {
    enableNnbd = true;
    createParser('with M?');
    WithClause clause = parser.parseWithClause();
    expectNotNullIfNoErrors(clause);
    listener.assertErrors(
        [expectedError(ParserErrorCode.NULLABLE_TYPE_IN_WITH, 6, 1)]);
  }

  void test_nullableTypeParameter() {
    enableNnbd = true;
    createParser('T?');
    TypeParameter parameter = parser.parseTypeParameter();
    expectNotNullIfNoErrors(parameter);
    listener.assertErrors(
        [expectedError(ParserErrorCode.NULLABLE_TYPE_PARAMETER, 1, 1)]);
  }
}

abstract class ErrorParserTestMixin implements AbstractParserTestCase {
  void test_abstractClassMember_constructor() {
    createParser('abstract C.c();');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrors(
        [expectedError(ParserErrorCode.ABSTRACT_CLASS_MEMBER, 0, 8)]);
  }

  void test_abstractClassMember_field() {
    createParser('abstract C f;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrors(
        [expectedError(ParserErrorCode.ABSTRACT_CLASS_MEMBER, 0, 8)]);
  }

  void test_abstractClassMember_getter() {
    createParser('abstract get m;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrors(
        [expectedError(ParserErrorCode.ABSTRACT_CLASS_MEMBER, 0, 8)]);
  }

  void test_abstractClassMember_method() {
    createParser('abstract m();');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrors(
        [expectedError(ParserErrorCode.ABSTRACT_CLASS_MEMBER, 0, 8)]);
  }

  void test_abstractClassMember_setter() {
    createParser('abstract set m(v);');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrors(
        [expectedError(ParserErrorCode.ABSTRACT_CLASS_MEMBER, 0, 8)]);
  }

  void test_abstractEnum() {
    parseCompilationUnit("abstract enum E {ONE}",
        errors: [expectedError(ParserErrorCode.ABSTRACT_ENUM, 0, 8)]);
  }

  void test_abstractTopLevelFunction_function() {
    parseCompilationUnit("abstract f(v) {}", errors: [
      expectedError(ParserErrorCode.ABSTRACT_TOP_LEVEL_FUNCTION, 0, 8)
    ]);
  }

  void test_abstractTopLevelFunction_getter() {
    parseCompilationUnit("abstract get m {}", errors: [
      expectedError(ParserErrorCode.ABSTRACT_TOP_LEVEL_FUNCTION, 0, 8)
    ]);
  }

  void test_abstractTopLevelFunction_setter() {
    parseCompilationUnit("abstract set m(v) {}", errors: [
      expectedError(ParserErrorCode.ABSTRACT_TOP_LEVEL_FUNCTION, 0, 8)
    ]);
  }

  void test_abstractTopLevelVariable() {
    parseCompilationUnit("abstract C f;", errors: [
      expectedError(ParserErrorCode.ABSTRACT_TOP_LEVEL_VARIABLE, 0, 8)
    ]);
  }

  void test_abstractTypeDef() {
    parseCompilationUnit("abstract typedef F();",
        errors: [expectedError(ParserErrorCode.ABSTRACT_TYPEDEF, 0, 8)]);
  }

  void test_annotationOnEnumConstant_first() {
    parseCompilationUnit("enum E { @override C }", errors: [
      expectedError(ParserErrorCode.ANNOTATION_ON_ENUM_CONSTANT, 9, 9)
    ]);
  }

  void test_annotationOnEnumConstant_middle() {
    parseCompilationUnit("enum E { C, @override D, E }", errors: [
      expectedError(ParserErrorCode.ANNOTATION_ON_ENUM_CONSTANT, 12, 9)
    ]);
  }

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

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

  void test_breakOutsideOfLoop_breakInIfStatement() {
    IfStatement statement = parseStatement('if (x) {break;}');
    expectNotNullIfNoErrors(statement);
    listener.assertErrors(
        [expectedError(ParserErrorCode.BREAK_OUTSIDE_OF_LOOP, 8, 5)]);
  }

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

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

  void test_breakOutsideOfLoop_functionExpression_inALoop() {
    parseStatement("for(; x;) {() {break;};}");
    listener.assertErrors(
        [expectedError(ParserErrorCode.BREAK_OUTSIDE_OF_LOOP, 15, 5)]);
  }

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

  void test_classInClass_abstract() {
    parseCompilationUnit("class C { abstract class B {} }",
        errors: usingFastaParser
            ? [
                expectedError(ParserErrorCode.ABSTRACT_CLASS_MEMBER, 10, 8),
                expectedError(ParserErrorCode.CLASS_IN_CLASS, 19, 5)
              ]
            : [expectedError(ParserErrorCode.CLASS_IN_CLASS, 19, 5)]);
  }

  void test_classInClass_nonAbstract() {
    parseCompilationUnit("class C { class B {} }",
        errors: [expectedError(ParserErrorCode.CLASS_IN_CLASS, 10, 5)]);
  }

  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.assertErrors(usingFastaParser
        ? [expectedError(ParserErrorCode.EXPECTED_TYPE_NAME, 10, 8)]
        : [
            expectedError(ParserErrorCode.EXPECTED_TOKEN, 0, 0),
            expectedError(ParserErrorCode.EXPECTED_TOKEN, 0, 0)
          ]);
  }

  void test_colonInPlaceOfIn() {
    parseStatement("for (var x : list) {}");
    listener.assertErrors(
        [expectedError(ParserErrorCode.COLON_IN_PLACE_OF_IN, 11, 1)]);
  }

  void test_constAndCovariant() {
    createParser('covariant const C f = null;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrors(
        [expectedError(ParserErrorCode.CONST_AND_COVARIANT, 10, 5)]);
  }

  void test_constAndFinal() {
    createParser('const final int x = null;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener
        .assertErrors([expectedError(ParserErrorCode.CONST_AND_FINAL, 6, 5)]);
  }

  void test_constAndVar() {
    createParser('const var x = null;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrors([expectedError(ParserErrorCode.CONST_AND_VAR, 6, 3)]);
  }

  void test_constClass() {
    parseCompilationUnit("const class C {}",
        errors: [expectedError(ParserErrorCode.CONST_CLASS, 0, 5)]);
  }

  void test_constConstructorWithBody() {
    createParser('const C() {}');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrors(
        [expectedError(ParserErrorCode.CONST_CONSTRUCTOR_WITH_BODY, 10, 1)]);
  }

  void test_constEnum() {
    parseCompilationUnit("const enum E {ONE}",
        errors: [expectedError(ParserErrorCode.CONST_ENUM, 0, 5)]);
  }

  void test_constFactory() {
    createParser('const factory C() {}');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrors([expectedError(ParserErrorCode.CONST_FACTORY, 0, 5)]);
  }

  void test_constMethod() {
    createParser('const int m() {}');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrors([expectedError(ParserErrorCode.CONST_METHOD, 0, 5)]);
  }

  void test_constructorPartial() {
    createParser('class C { C< }');
    parser.parseCompilationUnit2();
    listener.assertErrors(usingFastaParser
        ? [
            expectedError(ParserErrorCode.MISSING_IDENTIFIER, 13, 1),
            expectedError(ParserErrorCode.EXPECTED_TOKEN, 13, 1),
            expectedError(ParserErrorCode.MISSING_METHOD_PARAMETERS, 10, 1),
            expectedError(ParserErrorCode.MISSING_FUNCTION_BODY, 13, 1)
          ]
        : [
            expectedError(ParserErrorCode.EXPECTED_TYPE_NAME, 13, 1),
            expectedError(ParserErrorCode.EXPECTED_TOKEN, 13, 1),
            expectedError(ParserErrorCode.MISSING_IDENTIFIER, 13, 1),
            expectedError(ParserErrorCode.EXPECTED_TOKEN, 13, 1)
          ]);
  }

  void test_constructorWithReturnType() {
    createParser('C C() {}');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrors(
        [expectedError(ParserErrorCode.CONSTRUCTOR_WITH_RETURN_TYPE, 0, 1)]);
  }

  void test_constructorWithReturnType_var() {
    createParser('var C() {}');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrors(usingFastaParser
        ? [expectedError(ParserErrorCode.VAR_RETURN_TYPE, 0, 3)]
        : [expectedError(ParserErrorCode.CONSTRUCTOR_WITH_RETURN_TYPE, 0, 3)]);
  }

  void test_constTypedef() {
    parseCompilationUnit("const typedef F();",
        errors: [expectedError(ParserErrorCode.CONST_TYPEDEF, 0, 5)]);
  }

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

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

  void test_continueOutsideOfLoop_continueInIfStatement() {
    IfStatement statement = parseStatement('if (x) {continue;}');
    expectNotNullIfNoErrors(statement);
    listener.assertErrors(
        [expectedError(ParserErrorCode.CONTINUE_OUTSIDE_OF_LOOP, 8, 8)]);
  }

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

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

  void test_continueOutsideOfLoop_functionExpression_inALoop() {
    parseStatement("for(; x;) {() {continue;};}");
    listener.assertErrors(
        [expectedError(ParserErrorCode.CONTINUE_OUTSIDE_OF_LOOP, 15, 8)]);
  }

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

  void test_continueWithoutLabelInCase_error() {
    SwitchStatement statement =
        parseStatement('switch (x) {case 1: continue;}');
    expectNotNullIfNoErrors(statement);
    listener.assertErrors(
        [expectedError(ParserErrorCode.CONTINUE_WITHOUT_LABEL_IN_CASE, 20, 8)]);
  }

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

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

  void test_covariantAfterVar() {
    createParser('var covariant f;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrors(
        [expectedError(ParserErrorCode.COVARIANT_AFTER_VAR, 4, 9)]);
  }

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

  void test_covariantAndStatic() {
    createParser('covariant static A f;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrors(
        [expectedError(ParserErrorCode.COVARIANT_AND_STATIC, 10, 6)]);
  }

  void test_covariantAndType_local() {
    // This is currently reporting EXPECTED_TOKEN for a missing semicolon, but
    // this would be a better error message.
    parseStatement("covariant int x;");
    listener.assertErrors(usingFastaParser
        ? [expectedError(ParserErrorCode.EXTRANEOUS_MODIFIER, 0, 9)]
        : [expectedError(ParserErrorCode.EXPECTED_TOKEN, 0, 9)]);
  }

  void test_covariantConstructor() {
    createParser('class C { covariant C(); }');
    ClassDeclaration member = parseFullCompilationUnitMember();
    expectNotNullIfNoErrors(member);
    listener.assertErrors([
      expectedError(
          usingFastaParser
              ? ParserErrorCode.COVARIANT_MEMBER
              : ParserErrorCode.COVARIANT_CONSTRUCTOR,
          10,
          9)
    ]);
  }

  void test_covariantMember_getter_noReturnType() {
    createParser('static covariant get x => 0;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrors(usingFastaParser
        ? [expectedError(ParserErrorCode.COVARIANT_AND_STATIC, 7, 9)]
        : [expectedError(ParserErrorCode.COVARIANT_MEMBER, 7, 9)]);
  }

  void test_covariantMember_getter_returnType() {
    createParser('static covariant int get x => 0;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrors(usingFastaParser
        ? [expectedError(ParserErrorCode.COVARIANT_AND_STATIC, 7, 9)]
        : [expectedError(ParserErrorCode.COVARIANT_MEMBER, 7, 9)]);
  }

  void test_covariantMember_method() {
    createParser('covariant int m() => 0;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener
        .assertErrors([expectedError(ParserErrorCode.COVARIANT_MEMBER, 0, 9)]);
  }

  void test_covariantTopLevelDeclaration_class() {
    createParser('covariant class C {}');
    ClassDeclaration member = parseFullCompilationUnitMember();
    expectNotNullIfNoErrors(member);
    listener.assertErrors(
        [expectedError(ParserErrorCode.COVARIANT_TOP_LEVEL_DECLARATION, 0, 9)]);
  }

  void test_covariantTopLevelDeclaration_enum() {
    createParser('covariant enum E { v }');
    EnumDeclaration member = parseFullCompilationUnitMember();
    expectNotNullIfNoErrors(member);
    listener.assertErrors(
        [expectedError(ParserErrorCode.COVARIANT_TOP_LEVEL_DECLARATION, 0, 9)]);
  }

  void test_covariantTopLevelDeclaration_typedef() {
    parseCompilationUnit("covariant typedef F();", errors: [
      expectedError(ParserErrorCode.COVARIANT_TOP_LEVEL_DECLARATION, 0, 9)
    ]);
  }

  void test_defaultValueInFunctionType_named_colon() {
    createParser('({int x : 0})');
    FormalParameter parameter =
        parser.parseFormalParameterList(inFunctionType: true).parameters[0];
    expectNotNullIfNoErrors(parameter);
    listener.assertErrors(
        [expectedError(ParserErrorCode.DEFAULT_VALUE_IN_FUNCTION_TYPE, 8, 1)]);
  }

  void test_defaultValueInFunctionType_named_equal() {
    createParser('({int x = 0})');
    FormalParameter parameter =
        parser.parseFormalParameterList(inFunctionType: true).parameters[0];
    expectNotNullIfNoErrors(parameter);
    listener.assertErrors(
        [expectedError(ParserErrorCode.DEFAULT_VALUE_IN_FUNCTION_TYPE, 8, 1)]);
  }

  void test_defaultValueInFunctionType_positional() {
    createParser('([int x = 0])');
    FormalParameter parameter =
        parser.parseFormalParameterList(inFunctionType: true).parameters[0];
    expectNotNullIfNoErrors(parameter);
    listener.assertErrors(
        [expectedError(ParserErrorCode.DEFAULT_VALUE_IN_FUNCTION_TYPE, 8, 1)]);
  }

  void test_directiveAfterDeclaration_classBeforeDirective() {
    // TODO(brianwilkerson) Remove codes when highlighting is fixed.
    CompilationUnit unit = parseCompilationUnit("class Foo{} library l;",
        codes: usingFastaParser
            ? [ParserErrorCode.LIBRARY_DIRECTIVE_NOT_FIRST]
            : [ParserErrorCode.DIRECTIVE_AFTER_DECLARATION],
        errors: usingFastaParser
            ? [
                expectedError(
                    ParserErrorCode.LIBRARY_DIRECTIVE_NOT_FIRST, 12, 10)
              ]
            : [
                expectedError(
                    ParserErrorCode.DIRECTIVE_AFTER_DECLARATION, 12, 10)
              ]);
    expect(unit, isNotNull);
  }

  void test_directiveAfterDeclaration_classBetweenDirectives() {
    // TODO(brianwilkerson) Remove codes when highlighting is fixed.
    CompilationUnit unit =
        parseCompilationUnit("library l;\nclass Foo{}\npart 'a.dart';", codes: [
      ParserErrorCode.DIRECTIVE_AFTER_DECLARATION
    ], errors: [
      expectedError(ParserErrorCode.DIRECTIVE_AFTER_DECLARATION, 23, 14)
    ]);
    expect(unit, isNotNull);
  }

  void test_duplicatedModifier_const() {
    createParser('const const m = null;');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrors(
        [expectedError(ParserErrorCode.DUPLICATED_MODIFIER, 6, 5)]);
  }

  void test_duplicatedModifier_external() {
    createParser('external external f();');
    ClassMember member = parser.parseClassMember('C');
    expectNotNullIfNoErrors(member);
    listener.assertErrors(
        [expectedError(ParserErrorCode.DUPLICATED_MODIFIER, 9, 8)]);