pkg/analyzer/test/src/diagnostics/implements_deferred_class_test.dart

// Copyright (c) 2020, 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:test_reflective_loader/test_reflective_loader.dart';

import '../dart/resolution/context_collection_resolution.dart';

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

@reflectiveTest
class ImplementsDeferredClassTest extends PubPackageResolutionTest {
  test_class_implements() async {
    newFile('$testPackageLibPath/lib1.dart', '''
library lib1;
class A {}
''');
    var result = await resolveTestCodeWithDiagnostics(r'''
library root;
import 'lib1.dart' deferred as a;
class B implements a.A {}
//                 ^^^
// [diag.implementsDeferredClass] Classes and mixins can't implement deferred classes.
''');

    var node = result.findNode.singleImplementsClause;
    assertResolvedNodeText(node, r'''
ImplementsClause
  implementsKeyword: implements
  interfaces
    NamedType
      importPrefix: ImportPrefixReference
        name: a
        period: .
        element: <testLibraryFragment>::@prefix::a
      name: A
      element: package:test/lib1.dart::@class::A
      type: A
''');
  }

  test_class_implements_interfaceTypeTypedef() async {
    newFile('$testPackageLibPath/lib1.dart', '''
library lib1;
class A {}
typedef B = A;
''');
    var result = await resolveTestCodeWithDiagnostics(r'''
library root;
import 'lib1.dart' deferred as a;
class C implements a.B {}
//                 ^^^
// [diag.implementsDeferredClass] Classes and mixins can't implement deferred classes.
''');

    var node = result.findNode.singleImplementsClause;
    assertResolvedNodeText(node, r'''
ImplementsClause
  implementsKeyword: implements
  interfaces
    NamedType
      importPrefix: ImportPrefixReference
        name: a
        period: .
        element: <testLibraryFragment>::@prefix::a
      name: B
      element: package:test/lib1.dart::@typeAlias::B
      type: A
        alias: package:test/lib1.dart::@typeAlias::B
''');
  }

  test_classTypeAlias() async {
    newFile('$testPackageLibPath/lib1.dart', '''
library lib1;
class A {}
''');
    var result = await resolveTestCodeWithDiagnostics(r'''
library root;
import 'lib1.dart' deferred as a;
class B {}
class M {}
class C = B with M implements a.A;
//                            ^^^
// [diag.implementsDeferredClass] Classes and mixins can't implement deferred classes.
''');

    var node = result.findNode.singleImplementsClause;
    assertResolvedNodeText(node, r'''
ImplementsClause
  implementsKeyword: implements
  interfaces
    NamedType
      importPrefix: ImportPrefixReference
        name: a
        period: .
        element: <testLibraryFragment>::@prefix::a
      name: A
      element: package:test/lib1.dart::@class::A
      type: A
''');
  }

  test_extensionType_implements_class() async {
    newFile('$testPackageLibPath/a.dart', '''
class A {}
''');

    var result = await resolveTestCodeWithDiagnostics(r'''
import 'a.dart' deferred as a;
extension type B(a.A it) implements a.A {}
//               ^^^
// [diag.typeAnnotationDeferredClass] The deferred type 'a.A' can't be used in a declaration, cast, or type test.
//                                  ^^^
// [diag.implementsDeferredClass] Classes and mixins can't implement deferred classes.
''');

    var node = result.findNode.singleImplementsClause;
    assertResolvedNodeText(node, r'''
ImplementsClause
  implementsKeyword: implements
  interfaces
    NamedType
      importPrefix: ImportPrefixReference
        name: a
        period: .
        element: <testLibraryFragment>::@prefix::a
      name: A
      element: package:test/a.dart::@class::A
      type: A
''');
  }

  test_extensionType_implements_extensionType() async {
    newFile('$testPackageLibPath/a.dart', '''
extension type A(int it) {}
''');

    var result = await resolveTestCodeWithDiagnostics(r'''
import 'a.dart' deferred as a;
extension type B(int it) implements a.A {}
//                                  ^^^
// [diag.implementsDeferredClass] Classes and mixins can't implement deferred classes.
''');

    var node = result.findNode.singleImplementsClause;
    assertResolvedNodeText(node, r'''
ImplementsClause
  implementsKeyword: implements
  interfaces
    NamedType
      importPrefix: ImportPrefixReference
        name: a
        period: .
        element: <testLibraryFragment>::@prefix::a
      name: A
      element: package:test/a.dart::@extensionType::A
      type: A
''');
  }

  test_mixin() async {
    var result = await resolveTestCodeWithDiagnostics(r'''
import 'dart:math' deferred as math;
mixin M implements math.Random {}
//                 ^^^^^^^^^^^
// [diag.implementsDeferredClass] Classes and mixins can't implement deferred classes.
''');

    var node = result.findNode.singleImplementsClause;
    assertResolvedNodeText(node, r'''
ImplementsClause
  implementsKeyword: implements
  interfaces
    NamedType
      importPrefix: ImportPrefixReference
        name: math
        period: .
        element: <testLibraryFragment>::@prefix::math
      name: Random
      element: dart:math::@class::Random
      type: Random
''');
  }
}