| // 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 An equality expression of the form e1 != e2 is equivalent to the |
| /// expression !(e1 == e2). |
| /// @description Checks that expression of the form e1 != e2 is equivalent to the |
| /// expression !(e1 == e2). |
| /// @author msyabro |
| |
| |
| import '../../../Utils/expect.dart'; |
| |
| class A{ |
| operator ==(var val) { |
| return identical(this, val); |
| } |
| } |
| |
| main() { |
| A a = new A(); |
| A b = new A(); |
| Expect.equals(a != a, !(a == a)); |
| Expect.equals(a != b, !(a == b)); |
| } |