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

// Copyright (c) 2019, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'package:analyzer/src/dart/error/syntactic_errors.dart';
import 'package:analyzer/src/error/codes.dart';
import 'package:test_reflective_loader/test_reflective_loader.dart';

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

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

@reflectiveTest
class MixinSuperClassConstraintNonInterfaceTest
    extends PubPackageResolutionTest {
  test_dynamic() async {
    await assertErrorsInCode(r'''
mixin M on dynamic {}
''', [
      error(CompileTimeErrorCode.MIXIN_SUPER_CLASS_CONSTRAINT_NON_INTERFACE, 11,
          7),
    ]);

    var element = findElement.mixin('M');
    assertElementTypes(element.superclassConstraints, ['Object']);

    var typeRef = findNode.namedType('dynamic {}');
    assertNamedType(typeRef, dynamicElement, 'dynamic');
  }

  test_enum() async {
    await assertErrorsInCode(r'''
enum E { v }
mixin M on E {}
''', [
      error(CompileTimeErrorCode.MIXIN_SUPER_CLASS_CONSTRAINT_NON_INTERFACE, 24,
          1),
    ]);

    var element = findElement.mixin('M');
    assertElementTypes(element.superclassConstraints, ['Object']);

    var typeRef = findNode.namedType('E {}');
    assertNamedType(typeRef, findElement.enum_('E'), 'E');
  }

  test_Never() async {
    await assertErrorsInCode('''
mixin M on Never {}
''', [
      error(CompileTimeErrorCode.MIXIN_SUPER_CLASS_CONSTRAINT_NON_INTERFACE, 11,
          5),
    ]);
  }

  test_void() async {
    await assertErrorsInCode(r'''
mixin M on void {}
''', [
      error(ParserErrorCode.EXPECTED_TYPE_NAME, 11, 4),
      error(CompileTimeErrorCode.MIXIN_SUPER_CLASS_CONSTRAINT_NON_INTERFACE, 11,
          4),
    ]);

    var element = findElement.mixin('M');
    assertElementTypes(element.superclassConstraints, ['Object']);

    var typeRef = findNode.namedType('void {}');
    assertNamedType(typeRef, null, 'void');
  }
}