| /* |
| * 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 The supertypes of an interface are its direct supertypes and their supertypes. |
| * @description Trivially checks that an interface extending some other interface extends its superinterfaces as well. |
| * @author iefremov |
| * @reviewer rodionov |
| */ |
| 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); |
| } |
