pkg/analyzer/test/src/dart/parser/class_test.dart

// Copyright (c) 2023, 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/src/dart/error/syntactic_errors.dart';
import 'package:test_reflective_loader/test_reflective_loader.dart';

import '../../diagnostics/parser_diagnostics.dart';

main() {
  defineReflectiveSuite(() {
    defineReflectiveTests(ClassDeclarationParserTest);
  });
}

@reflectiveTest
class ClassDeclarationParserTest extends ParserDiagnosticsTest {
  test_augment_constructor_named() {
    var parseResult = parseStringWithErrors(r'''
augment class A {
  augment A.named();
}
''');
    parseResult.assertNoErrors();

    var node = parseResult.findNode.singleClassDeclaration;
    assertParsedNodeText(node, r'''
ClassDeclaration
  augmentKeyword: augment
  classKeyword: class
  name: A
  leftBracket: {
  members
    ConstructorDeclaration
      augmentKeyword: augment
      returnType: SimpleIdentifier
        token: A
      period: .
      name: named
      parameters: FormalParameterList
        leftParenthesis: (
        rightParenthesis: )
      body: EmptyFunctionBody
        semicolon: ;
  rightBracket: }
''');
  }

  test_constructor_external_fieldFormalParameter_optionalPositional() {
    var parseResult = parseStringWithErrors(r'''
class A {
  final int f;
  external A([this.f = 0]);
}
''');
    parseResult.assertErrors([
      error(ParserErrorCode.externalConstructorWithFieldInitializers, 39, 4),
    ]);

    var node = parseResult.findNode.singleConstructorDeclaration;
    assertParsedNodeText(node, r'''
ConstructorDeclaration
  externalKeyword: external
  returnType: SimpleIdentifier
    token: A
  parameters: FormalParameterList
    leftParenthesis: (
    leftDelimiter: [
    parameter: DefaultFormalParameter
      parameter: FieldFormalParameter
        thisKeyword: this
        period: .
        name: f
      separator: =
      defaultValue: IntegerLiteral
        literal: 0
    rightDelimiter: ]
    rightParenthesis: )
  body: EmptyFunctionBody
    semicolon: ;
''');
  }

  test_constructor_external_fieldFormalParameter_requiredPositional() {
    var parseResult = parseStringWithErrors(r'''
class A {
  final int f;
  external A(this.f);
}
''');
    parseResult.assertErrors([
      error(ParserErrorCode.externalConstructorWithFieldInitializers, 38, 4),
    ]);

    var node = parseResult.findNode.singleConstructorDeclaration;
    assertParsedNodeText(node, r'''
ConstructorDeclaration
  externalKeyword: external
  returnType: SimpleIdentifier
    token: A
  parameters: FormalParameterList
    leftParenthesis: (
    parameter: FieldFormalParameter
      thisKeyword: this
      period: .
      name: f
    rightParenthesis: )
  body: EmptyFunctionBody
    semicolon: ;
''');
  }

  test_constructor_external_fieldInitializer() {
    var parseResult = parseStringWithErrors(r'''
class A {
  final int f;
  external A() : f = 0;
}
''');
    parseResult.assertErrors([
      error(ParserErrorCode.externalConstructorWithInitializer, 40, 1),
    ]);

    var node = parseResult.findNode.singleConstructorDeclaration;
    assertParsedNodeText(node, r'''
ConstructorDeclaration
  externalKeyword: external
  returnType: SimpleIdentifier
    token: A
  parameters: FormalParameterList
    leftParenthesis: (
    rightParenthesis: )
  separator: :
  initializers
    ConstructorFieldInitializer
      fieldName: SimpleIdentifier
        token: f
      equals: =
      expression: IntegerLiteral
        literal: 0
  body: EmptyFunctionBody
    semicolon: ;
''');
  }

  test_nameWithTypeParameters_hasTypeParameters() {
    useDeclaringConstructorsAst = true;
    var parseResult = parseStringWithErrors(r'''
class A<T, U> {}
''');
    parseResult.assertNoErrors();

    var node = parseResult.findNode.singleClassDeclaration;
    assertParsedNodeText(node, r'''
ClassDeclaration
  classKeyword: class
  namePart: NameWithTypeParameters
    typeName: A
    typeParameters: TypeParameterList
      leftBracket: <
      typeParameters
        TypeParameter
          name: T
        TypeParameter
          name: U
      rightBracket: >
  body: BlockClassBody
    leftBracket: {
    rightBracket: }
''');

    {
      useDeclaringConstructorsAst = false;
      var parseResult = parseStringWithErrors(r'''
class A<T, U> {}
''');
      parseResult.assertNoErrors();

      var node = parseResult.findNode.singleClassDeclaration;
      assertParsedNodeText(node, r'''
ClassDeclaration
  classKeyword: class
  name: A
  typeParameters: TypeParameterList
    leftBracket: <
    typeParameters
      TypeParameter
        name: T
      TypeParameter
        name: U
    rightBracket: >
  leftBracket: {
  rightBracket: }
''');
    }
  }

  test_nameWithTypeParameters_noTypeParameters() {
    useDeclaringConstructorsAst = true;
    var parseResult = parseStringWithErrors(r'''
class A {}
''');
    parseResult.assertNoErrors();

    var node = parseResult.findNode.singleClassDeclaration;
    assertParsedNodeText(node, r'''
ClassDeclaration
  classKeyword: class
  namePart: NameWithTypeParameters
    typeName: A
  body: BlockClassBody
    leftBracket: {
    rightBracket: }
''');

    {
      useDeclaringConstructorsAst = false;
      var parseResult = parseStringWithErrors(r'''
class A {}
''');
      parseResult.assertNoErrors();

      var node = parseResult.findNode.singleClassDeclaration;
      assertParsedNodeText(node, r'''
ClassDeclaration
  classKeyword: class
  name: A
  leftBracket: {
  rightBracket: }
''');
    }
  }

  test_primaryConstructor_const_hasTypeParameters_named() {
    useDeclaringConstructorsAst = true;
    var parseResult = parseStringWithErrors(r'''
class const A<T, U>.named() {}
''');
    parseResult.assertNoErrors();

    var node = parseResult.findNode.singleClassDeclaration;
    assertParsedNodeText(node, r'''
ClassDeclaration
  classKeyword: class
  namePart: PrimaryConstructorDeclaration
    constKeyword: const
    typeName: A
    typeParameters: TypeParameterList
      leftBracket: <
      typeParameters
        TypeParameter
          name: T
        TypeParameter
          name: U
      rightBracket: >
    constructorName: PrimaryConstructorName
      period: .
      name: named
    formalParameters: FormalParameterList
      leftParenthesis: (
      rightParenthesis: )
  body: BlockClassBody
    leftBracket: {
    rightBracket: }
''');
  }

  test_primaryConstructor_const_hasTypeParameters_unnamed() {
    useDeclaringConstructorsAst = true;
    var parseResult = parseStringWithErrors(r'''
class const A<T, U>() {}
''');
    parseResult.assertNoErrors();

    var node = parseResult.findNode.singleClassDeclaration;
    assertParsedNodeText(node, r'''
ClassDeclaration
  classKeyword: class
  namePart: PrimaryConstructorDeclaration
    constKeyword: const
    typeName: A
    typeParameters: TypeParameterList
      leftBracket: <
      typeParameters
        TypeParameter
          name: T
        TypeParameter
          name: U
      rightBracket: >
    formalParameters: FormalParameterList
      leftParenthesis: (
      rightParenthesis: )
  body: BlockClassBody
    leftBracket: {
    rightBracket: }
''');
  }

  test_primaryConstructor_const_namedMixinApplication() {
    useDeclaringConstructorsAst = true;
    var parseResult = parseStringWithErrors(r'''
mixin M {}
class const C = Object with M;
''');
    parseResult.assertErrors([
      error(ParserErrorCode.constWithoutPrimaryConstructor, 17, 5),
    ]);
  }

  test_primaryConstructor_const_noTypeParameters_named() {
    useDeclaringConstructorsAst = true;
    var parseResult = parseStringWithErrors(r'''
class const A.named() {}
''');
    parseResult.assertNoErrors();

    var node = parseResult.findNode.singleClassDeclaration;
    assertParsedNodeText(node, r'''
ClassDeclaration
  classKeyword: class
  namePart: PrimaryConstructorDeclaration
    constKeyword: const
    typeName: A
    constructorName: PrimaryConstructorName
      period: .
      name: named
    formalParameters: FormalParameterList
      leftParenthesis: (
      rightParenthesis: )
  body: BlockClassBody
    leftBracket: {
    rightBracket: }
''');
  }

  test_primaryConstructor_const_noTypeParameters_unnamed() {
    useDeclaringConstructorsAst = true;
    var parseResult = parseStringWithErrors(r'''
class const A() {}
''');
    parseResult.assertNoErrors();

    var node = parseResult.findNode.singleClassDeclaration;
    assertParsedNodeText(node, r'''
ClassDeclaration
  classKeyword: class
  namePart: PrimaryConstructorDeclaration
    constKeyword: const
    typeName: A
    formalParameters: FormalParameterList
      leftParenthesis: (
      rightParenthesis: )
  body: BlockClassBody
    leftBracket: {
    rightBracket: }
''');
  }

  test_primaryConstructor_const_typeName_noFormalParameters() {
    useDeclaringConstructorsAst = true;
    var parseResult = parseStringWithErrors(r'''
class const A {}
''');
    parseResult.assertErrors([
      error(ParserErrorCode.constWithoutPrimaryConstructor, 6, 5),
    ]);

    var node = parseResult.findNode.singleClassDeclaration;
    assertParsedNodeText(node, r'''
ClassDeclaration
  classKeyword: class
  namePart: NameWithTypeParameters
    typeName: A
  body: BlockClassBody
    leftBracket: {
    rightBracket: }
''');
  }

  test_primaryConstructor_const_typeName_periodName_noFormalParameters() {
    useDeclaringConstructorsAst = true;
    var parseResult = parseStringWithErrors(r'''
class const A.named {}
''');
    // TODO(scheglov): this is wrong.
    parseResult.assertNoErrors();

    var node = parseResult.findNode.singleClassDeclaration;
    assertParsedNodeText(node, r'''
ClassDeclaration
  classKeyword: class
  namePart: PrimaryConstructorDeclaration
    constKeyword: const
    typeName: A
    constructorName: PrimaryConstructorName
      period: .
      name: named
    formalParameters: FormalParameterList
      leftParenthesis: ( <synthetic>
      rightParenthesis: ) <synthetic>
  body: BlockClassBody
    leftBracket: {
    rightBracket: }
''');
  }

  test_primaryConstructor_declaringFormalParameter_default_namedOptional_final() {
    useDeclaringConstructorsAst = true;
    var parseResult = parseStringWithErrors(r'''
class A({final int a = 0}) {}
''');
    parseResult.assertNoErrors();

    var node = parseResult.findNode.singleClassDeclaration;
    assertParsedNodeText(node, r'''
ClassDeclaration
  classKeyword: class
  namePart: PrimaryConstructorDeclaration
    typeName: A
    formalParameters: FormalParameterList
      leftParenthesis: (
      leftDelimiter: {
      parameter: DefaultFormalParameter
        parameter: SimpleFormalParameter
          keyword: final
          type: NamedType
            name: int
          name: a
        separator: =
        defaultValue: IntegerLiteral
          literal: 0
      rightDelimiter: }
      rightParenthesis: )
  body: BlockClassBody
    leftBracket: {
    rightBracket: }
''');
  }

  test_primaryConstructor_declaringFormalParameter_default_namedOptional_var() {
    useDeclaringConstructorsAst = true;
    var parseResult = parseStringWithErrors(r'''
class A({var int a = 0}) {}
''');
    parseResult.assertNoErrors();

    var node = parseResult.findNode.singleClassDeclaration;
    assertParsedNodeText(node, r'''
ClassDeclaration
  classKeyword: class
  namePart: PrimaryConstructorDeclaration
    typeName: A
    formalParameters: FormalParameterList
      leftParenthesis: (
      leftDelimiter: {
      parameter: DefaultFormalParameter
        parameter: SimpleFormalParameter
          keyword: var
          type: NamedType
            name: int
          name: a
        separator: =
        defaultValue: IntegerLiteral
          literal: 0
      rightDelimiter: }
      rightParenthesis: )
  body: BlockClassBody
    leftBracket: {
    rightBracket: }
''');
  }

  test_primaryConstructor_declaringFormalParameter_default_namedRequired_final() {
    useDeclaringConstructorsAst = true;
    var parseResult = parseStringWithErrors(r'''
class A({required final int a = 0}) {}
''');
    parseResult.assertNoErrors();

    var node = parseResult.findNode.singleClassDeclaration;
    assertParsedNodeText(node, r'''
ClassDeclaration
  classKeyword: class
  namePart: PrimaryConstructorDeclaration
    typeName: A
    formalParameters: FormalParameterList
      leftParenthesis: (
      leftDelimiter: {
      parameter: DefaultFormalParameter
        parameter: SimpleFormalParameter
          requiredKeyword: required
          keyword: final
          type: NamedType
            name: int
          name: a
        separator: =
        defaultValue: IntegerLiteral
          literal: 0
      rightDelimiter: }
      rightParenthesis: )
  body: BlockClassBody
    leftBracket: {
    rightBracket: }
''');
  }

  test_primaryConstructor_declaringFormalParameter_default_namedRequired_var() {
    useDeclaringConstructorsAst = true;
    var parseResult = parseStringWithErrors(r'''
class A({required var int a = 0}) {}
''');
    parseResult.assertNoErrors();

    var node = parseResult.findNode.singleClassDeclaration;
    assertParsedNodeText(node, r'''
ClassDeclaration
  classKeyword: class
  namePart: PrimaryConstructorDeclaration
    typeName: A
    formalParameters: FormalParameterList
      leftParenthesis: (
      leftDelimiter: {
      parameter: DefaultFormalParameter
        parameter: SimpleFormalParameter
          requiredKeyword: required
          keyword: var
          type: NamedType
            name: int
          name: a
        separator: =
        defaultValue: IntegerLiteral
          literal: 0
      rightDelimiter: }
      rightParenthesis: )
  body: BlockClassBody
    leftBracket: {
    rightBracket: }
''');
  }

  test_primaryConstructor_declaringFormalParameter_default_positional_final() {
    useDeclaringConstructorsAst = true;
    var parseResult = parseStringWithErrors(r'''
class A([final int a = 0]) {}
''');
    parseResult.assertNoErrors();

    var node = parseResult.findNode.singleClassDeclaration;
    assertParsedNodeText(node, r'''
ClassDeclaration
  classKeyword: class
  namePart: PrimaryConstructorDeclaration
    typeName: A
    formalParameters: FormalParameterList
      leftParenthesis: (
      leftDelimiter: [
      parameter: DefaultFormalParameter
        parameter: SimpleFormalParameter
          keyword: final
          type: NamedType
            name: int
          name: a
        separator: =
        defaultValue: IntegerLiteral
          literal: 0
      rightDelimiter: ]
      rightParenthesis: )
  body: BlockClassBody
    leftBracket: {
    rightBracket: }
''');
  }

  test_primaryConstructor_declaringFormalParameter_default_positional_var() {
    useDeclaringConstructorsAst = true;
    var parseResult = parseStringWithErrors(r'''
class A([var int a = 0]) {}
''');
    parseResult.assertNoErrors();

    var node = parseResult.findNode.singleClassDeclaration;
    assertParsedNodeText(node, r'''
ClassDeclaration
  classKeyword: class
  namePart: PrimaryConstructorDeclaration
    typeName: A
    formalParameters: FormalParameterList
      leftParenthesis: (
      leftDelimiter: [
      parameter: DefaultFormalParameter
        parameter: SimpleFormalParameter
          keyword: var
          type: NamedType
            name: int
          name: a
        separator: =
        defaultValue: IntegerLiteral
          literal: 0
      rightDelimiter: ]
      rightParenthesis: )
  body: BlockClassBody
    leftBracket: {
    rightBracket: }
''');
  }

  test_primaryConstructor_declaringFormalParameter_functionTyped_final() {
    useDeclaringConstructorsAst = true;
    var parseResult = parseStringWithErrors(r'''
class A(final int a(String x)) {}
''');
    parseResult.assertNoErrors();

    var node = parseResult.findNode.singleClassDeclaration;
    assertParsedNodeText(node, r'''
ClassDeclaration
  classKeyword: class
  namePart: PrimaryConstructorDeclaration
    typeName: A
    formalParameters: FormalParameterList
      leftParenthesis: (
      parameter: FunctionTypedFormalParameter
        returnType: NamedType
          name: int
        name: a
        parameters: FormalParameterList
          leftParenthesis: (
          parameter: SimpleFormalParameter
            type: NamedType
              name: String
            name: x
          rightParenthesis: )
      rightParenthesis: )
  body: BlockClassBody
    leftBracket: {
    rightBracket: }
''');
  }

  test_primaryConstructor_declaringFormalParameter_functionTyped_var() {
    useDeclaringConstructorsAst = true;
    var parseResult = parseStringWithErrors(r'''
class A(var int a(String x)) {}
''');
    parseResult.assertNoErrors();

    var node = parseResult.findNode.singleClassDeclaration;
    assertParsedNodeText(node, r'''
ClassDeclaration
  classKeyword: class
  namePart: PrimaryConstructorDeclaration
    typeName: A
    formalParameters: FormalParameterList
      leftParenthesis: (
      parameter: FunctionTypedFormalParameter
        returnType: NamedType
          name: int
        name: a
        parameters: FormalParameterList
          leftParenthesis: (
          parameter: SimpleFormalParameter
            type: NamedType
              name: String
            name: x
          rightParenthesis: )
      rightParenthesis: )
  body: BlockClassBody
    leftBracket: {
    rightBracket: }
''');
  }

  test_primaryConstructor_declaringFormalParameter_simple_final() {
    useDeclaringConstructorsAst = true;
    var parseResult = parseStringWithErrors(r'''
class A(final int a) {}
''');
    parseResult.assertNoErrors();

    var node = parseResult.findNode.singleClassDeclaration;
    assertParsedNodeText(node, r'''
ClassDeclaration
  classKeyword: class
  namePart: PrimaryConstructorDeclaration
    typeName: A
    formalParameters: FormalParameterList
      leftParenthesis: (
      parameter: SimpleFormalParameter
        keyword: final
        type: NamedType
          name: int
        name: a
      rightParenthesis: )
  body: BlockClassBody
    leftBracket: {
    rightBracket: }
''');
  }

  test_primaryConstructor_declaringFormalParameter_simple_var() {
    useDeclaringConstructorsAst = true;
    var parseResult = parseStringWithErrors(r'''
class A(var int a) {}
''');
    parseResult.assertNoErrors();

    var node = parseResult.findNode.singleClassDeclaration;
    assertParsedNodeText(node, r'''
ClassDeclaration
  classKeyword: class
  namePart: PrimaryConstructorDeclaration
    typeName: A
    formalParameters: FormalParameterList
      leftParenthesis: (
      parameter: SimpleFormalParameter
        keyword: var
        type: NamedType
          name: int
        name: a
      rightParenthesis: )
  body: BlockClassBody
    leftBracket: {
    rightBracket: }
''');
  }

  test_primaryConstructor_fieldFormalParameter_final() {
    useDeclaringConstructorsAst = true;
    var parseResult = parseStringWithErrors(r'''
class A(final int this.a) {}
''');
    parseResult.assertNoErrors();

    var node = parseResult.findNode.singleClassDeclaration;
    assertParsedNodeText(node, r'''
ClassDeclaration
  classKeyword: class
  namePart: PrimaryConstructorDeclaration
    typeName: A
    formalParameters: FormalParameterList
      leftParenthesis: (
      parameter: FieldFormalParameter
        keyword: final
        type: NamedType
          name: int
        thisKeyword: this
        period: .
        name: a
      rightParenthesis: )
  body: BlockClassBody
    leftBracket: {
    rightBracket: }
''');
  }

  test_primaryConstructor_fieldFormalParameter_var() {
    useDeclaringConstructorsAst = true;
    var parseResult = parseStringWithErrors(r'''
class A(var int this.a) {}
''');
    parseResult.assertNoErrors();

    var node = parseResult.findNode.singleClassDeclaration;
    assertParsedNodeText(node, r'''
ClassDeclaration
  classKeyword: class
  namePart: PrimaryConstructorDeclaration
    typeName: A
    formalParameters: FormalParameterList
      leftParenthesis: (
      parameter: FieldFormalParameter
        keyword: var
        type: NamedType
          name: int
        thisKeyword: this
        period: .
        name: a
      rightParenthesis: )
  body: BlockClassBody
    leftBracket: {
    rightBracket: }
''');
  }

  test_primaryConstructor_notConst_hasTypeParameters_named() {
    useDeclaringConstructorsAst = true;
    var parseResult = parseStringWithErrors(r'''
class A<T, U>.named() {}
''');
    parseResult.assertNoErrors();

    var node = parseResult.findNode.singleClassDeclaration;
    assertParsedNodeText(node, r'''
ClassDeclaration
  classKeyword: class
  namePart: PrimaryConstructorDeclaration
    typeName: A
    typeParameters: TypeParameterList
      leftBracket: <
      typeParameters
        TypeParameter
          name: T
        TypeParameter
          name: U
      rightBracket: >
    constructorName: PrimaryConstructorName
      period: .
      name: named
    formalParameters: FormalParameterList
      leftParenthesis: (
      rightParenthesis: )
  body: BlockClassBody
    leftBracket: {
    rightBracket: }
''');
  }

  test_primaryConstructor_notConst_hasTypeParameters_unnamed() {
    useDeclaringConstructorsAst = true;
    var parseResult = parseStringWithErrors(r'''
class A<T, U>() {}
''');
    parseResult.assertNoErrors();

    var node = parseResult.findNode.singleClassDeclaration;
    assertParsedNodeText(node, r'''
ClassDeclaration
  classKeyword: class
  namePart: PrimaryConstructorDeclaration
    typeName: A
    typeParameters: TypeParameterList
      leftBracket: <
      typeParameters
        TypeParameter
          name: T
        TypeParameter
          name: U
      rightBracket: >
    formalParameters: FormalParameterList
      leftParenthesis: (
      rightParenthesis: )
  body: BlockClassBody
    leftBracket: {
    rightBracket: }
''');
  }

  test_primaryConstructor_notConst_noTypeParameters_named() {
    useDeclaringConstructorsAst = true;
    var parseResult = parseStringWithErrors(r'''
class A.named() {}
''');
    parseResult.assertNoErrors();

    var node = parseResult.findNode.singleClassDeclaration;
    assertParsedNodeText(node, r'''
ClassDeclaration
  classKeyword: class
  namePart: PrimaryConstructorDeclaration
    typeName: A
    constructorName: PrimaryConstructorName
      period: .
      name: named
    formalParameters: FormalParameterList
      leftParenthesis: (
      rightParenthesis: )
  body: BlockClassBody
    leftBracket: {
    rightBracket: }
''');
  }

  test_primaryConstructor_notConst_noTypeParameters_unnamed() {
    useDeclaringConstructorsAst = true;
    var parseResult = parseStringWithErrors(r'''
class A() {}
''');
    parseResult.assertNoErrors();

    var node = parseResult.findNode.singleClassDeclaration;
    assertParsedNodeText(node, r'''
ClassDeclaration
  classKeyword: class
  namePart: PrimaryConstructorDeclaration
    typeName: A
    formalParameters: FormalParameterList
      leftParenthesis: (
      rightParenthesis: )
  body: BlockClassBody
    leftBracket: {
    rightBracket: }
''');
  }

  test_primaryConstructor_superFormalParameter_final_namedType() {
    useDeclaringConstructorsAst = true;
    var parseResult = parseStringWithErrors(r'''
class A(final int super.a) {}
''');
    // TODO(scheglov): this is wrong.
    parseResult.assertNoErrors();

    var node = parseResult.findNode.singleClassDeclaration;
    assertParsedNodeText(node, r'''
ClassDeclaration
  classKeyword: class
  namePart: PrimaryConstructorDeclaration
    typeName: A
    formalParameters: FormalParameterList
      leftParenthesis: (
      parameter: SuperFormalParameter
        keyword: final
        type: NamedType
          name: int
        superKeyword: super
        period: .
        name: a
      rightParenthesis: )
  body: BlockClassBody
    leftBracket: {
    rightBracket: }
''');
  }

  test_primaryConstructor_superFormalParameter_var_namedType() {
    useDeclaringConstructorsAst = true;
    var parseResult = parseStringWithErrors(r'''
class A(var int super.a) {}
''');
    parseResult.assertErrors([error(ParserErrorCode.extraneousModifier, 8, 3)]);

    var node = parseResult.findNode.singleClassDeclaration;
    assertParsedNodeText(node, r'''
ClassDeclaration
  classKeyword: class
  namePart: PrimaryConstructorDeclaration
    typeName: A
    formalParameters: FormalParameterList
      leftParenthesis: (
      parameter: SuperFormalParameter
        keyword: var
        type: NamedType
          name: int
        superKeyword: super
        period: .
        name: a
      rightParenthesis: )
  body: BlockClassBody
    leftBracket: {
    rightBracket: }
''');
  }

  test_setter_formalParameters_absent() {
    var parseResult = parseStringWithErrors(r'''
class A {
  set foo {}
}
''');
    parseResult.assertErrors([
      error(ParserErrorCode.missingMethodParameters, 16, 3),
    ]);

    var node = parseResult.findNode.singleMethodDeclaration;
    assertParsedNodeText(node, withOffsets: true, r'''
MethodDeclaration
  propertyKeyword: set @12
  name: foo @16
  parameters: FormalParameterList
    leftParenthesis: ( @20 <synthetic>
    parameter: SimpleFormalParameter
      name: <empty> @20 <synthetic>
    rightParenthesis: ) @20 <synthetic>
  body: BlockFunctionBody
    block: Block
      leftBracket: { @20
      rightBracket: } @21
''');
  }

  test_setter_formalParameters_optionalNamed() {
    var parseResult = parseStringWithErrors(r'''
class A {
  set foo({a}) {}
}
''');
    parseResult.assertErrors([
      error(ParserErrorCode.wrongNumberOfParametersForSetter, 16, 3),
    ]);

    var node = parseResult.findNode.singleMethodDeclaration;
    assertParsedNodeText(node, withOffsets: true, r'''
MethodDeclaration
  propertyKeyword: set @12
  name: foo @16
  parameters: FormalParameterList
    leftParenthesis: ( @19
    parameter: SimpleFormalParameter
      name: a @21
    rightParenthesis: ) @23
  body: BlockFunctionBody
    block: Block
      leftBracket: { @25
      rightBracket: } @26
''');
  }

  test_setter_formalParameters_optionalPositional() {
    var parseResult = parseStringWithErrors(r'''
class A {
  set foo([a]) {}
}
''');
    parseResult.assertErrors([
      error(ParserErrorCode.wrongNumberOfParametersForSetter, 16, 3),
    ]);

    var node = parseResult.findNode.singleMethodDeclaration;
    assertParsedNodeText(node, withOffsets: true, r'''
MethodDeclaration
  propertyKeyword: set @12
  name: foo @16
  parameters: FormalParameterList
    leftParenthesis: ( @19
    parameter: SimpleFormalParameter
      name: a @21
    rightParenthesis: ) @23
  body: BlockFunctionBody
    block: Block
      leftBracket: { @25
      rightBracket: } @26
''');
  }

  test_setter_formalParameters_requiredPositional_three() {
    var parseResult = parseStringWithErrors(r'''
class A {
  set foo(a, b, c) {}
}
''');
    parseResult.assertErrors([
      error(ParserErrorCode.wrongNumberOfParametersForSetter, 16, 3),
    ]);

    var node = parseResult.findNode.singleMethodDeclaration;
    assertParsedNodeText(node, withOffsets: true, r'''
MethodDeclaration
  propertyKeyword: set @12
  name: foo @16
  parameters: FormalParameterList
    leftParenthesis: ( @19
    parameter: SimpleFormalParameter
      name: a @20
    rightParenthesis: ) @27
  body: BlockFunctionBody
    block: Block
      leftBracket: { @29
      rightBracket: } @30
''');
  }

  test_setter_formalParameters_zero() {
    var parseResult = parseStringWithErrors(r'''
class A {
  set foo() {}
}
''');
    parseResult.assertErrors([
      error(ParserErrorCode.wrongNumberOfParametersForSetter, 16, 3),
    ]);

    var node = parseResult.findNode.singleMethodDeclaration;
    assertParsedNodeText(node, withOffsets: true, r'''
MethodDeclaration
  propertyKeyword: set @12
  name: foo @16
  parameters: FormalParameterList
    leftParenthesis: ( @19
    parameter: SimpleFormalParameter
      name: <empty> @20 <synthetic>
    rightParenthesis: ) @20
  body: BlockFunctionBody
    block: Block
      leftBracket: { @22
      rightBracket: } @23
''');
  }
}