Language/Types/Interface_Types/direct_supertype_t04.dart

// Copyright (c) 2016, 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.

/// @assertion The implicit interface of class I is a direct supertype of the
/// implicit interface of class J iff:
/// • If I is Object, and J has no extends clause
/// • If I is listed in the extends clause of J.
/// • If I is listed in the implements clause of J
/// • If I is listed in the with clause of J
/// • If J is a mixin application of the mixin of I.
/// @description Checks that a type listed in the with clause of another class
/// is its supertype.
/// @author ngl@unipro.ru

import "../../../Utils/expect.dart";

class I {}
class M {}
class J extends I with M {}

main() {
  Expect.isTrue(new J() is M);
  Expect.runtimeIsType<M>(new J());
}