| /* |
| * Copyright (c) 2011, 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 A class S is a superclass of a class C iff either: |
| * - S is the superclass of C, or |
| * - S is a superclass of a class S0 and S0 is a superclass of C. |
| * @description Checks that the superclass-subclass relationship is transitive. |
| * @author rodionov |
| * @reviewer iefremov |
| */ |
| import "../../Utils/expect.dart"; |
| |
| class A {} |
| class B extends A {} |
| class C extends B {} |
| class D extends C {} |
| |
| main() { |
| D d = new D(); |
| Expect.isTrue(d is B); |
| Expect.isTrue(d is A); |
| Expect.isTrue(d is Object); |
| } |
