| // Copyright (c) 2012, 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. |
| |
| // @dart = 2.7 |
| |
| import "package:expect/expect.dart"; |
| |
| class AlwaysTrue { |
| operator ==(a) => true; |
| } |
| |
| class AlwaysFalse { |
| operator ==(b) => false; |
| } |
| |
| main() { |
| dynamic a = new AlwaysTrue(); |
| Expect.isTrue(a == 2); |
| Expect.isFalse(a == null); |
| Expect.isFalse(a != 2); |
| Expect.isTrue(a != null); |
| |
| a = new AlwaysFalse(); |
| Expect.isFalse(a == 2); |
| Expect.isFalse(a == null); |
| Expect.isTrue(a != 2); |
| Expect.isTrue(a != null); |
| } |