| // 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 Evaluation of an equality expression ee of the form super == e |
| * proceeds as follows: |
| * • The expression e is evaluated to an object o. |
| * • If either this or o is null, then ee evaluates to evaluates to true if both |
| * this and o are null and to false otherwise. Otherwise |
| * • ee is equivalent to the method invocation super.==(o). |
| * @description Checks that if operands are not null, user-defined operator == |
| * will be invoked on the instance referenced by 'super'. |
| * @author msyabro |
| * @reviewer kaigorodov |
| */ |
| |
| import '../../../Utils/expect.dart'; |
| |
| class TestException {} |
| |
| class S { |
| operator ==(other) { |
| throw new TestException(); |
| } |
| } |
| |
| class A extends S { |
| test() { |
| try { |
| super == 1; |
| Expect.fail("operator == was not called"); |
| } on TestException catch (e) {} |
| } |
| } |
| |
| main() { |
| A a = new A(); |
| a.test(); |
| } |