| // 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 S is a supertype of T , written S :> T , iff T is a subtype of S. |
| /// @description Trivially checks that an interface extending some other |
| /// interface extends its superinterfaces as well. |
| /// @author iefremov |
| |
| import "../../../Utils/expect.dart"; |
| |
| class I0 {} |
| |
| class I1 implements I0 {} |
| |
| class I2 implements I1 {} |
| |
| class A implements I2 {} |
| |
| main() { |
| Expect.isTrue(new A() is I1); |
| Expect.isTrue(new A() is I0); |
| } |
