pkg/compiler/test/model/forwarding_stub_test.dart

// Copyright (c) 2018, 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.

// @dart = 2.7

import 'package:async_helper/async_helper.dart';
import 'package:compiler/src/common_elements.dart';
import 'package:compiler/src/compiler.dart';
import 'package:compiler/src/elements/entities.dart';
import 'package:compiler/src/world.dart';
import 'package:expect/expect.dart';
import '../helpers/memory_compiler.dart';

const String source = '''

class Mixin<T> {
  void method(T t) {}
}
class Super {}
class Class extends Super with Mixin<int> {}

main() {
  new Class().method(0);
}
''';

main() {
  asyncTest(() async {
    CompilationResult result =
        await (runCompiler(memorySourceFiles: {'main.dart': source}));
    Expect.isTrue(result.isSuccess);
    Compiler compiler = result.compiler;
    JClosedWorld closedWorld = compiler.backendClosedWorldForTesting;
    ElementEnvironment elementEnvironment = closedWorld.elementEnvironment;
    ClassEntity cls =
        elementEnvironment.lookupClass(elementEnvironment.mainLibrary, 'Class');
    ClassEntity mixin =
        elementEnvironment.lookupClass(elementEnvironment.mainLibrary, 'Mixin');
    FunctionEntity method = elementEnvironment.lookupClassMember(cls, 'method');
    Expect.isNotNull(method);
    Expect.equals(mixin, method.enclosingClass);
    Expect.isFalse(method.isAbstract);
  });
}