Language/Expressions/Equality/not_equal_equivalent_super_t01.dart

// 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 super != e is equivalent to the
 * expression !(super == e).
 * @description Checks that expression of the form super != e is equivalent to
 * the expression !(super == e).
 * @author msyabro
 */

import '../../../Utils/expect.dart';

class S{
  operator ==(var val) {
    return identical(this, val);
  }
}

class A extends S {
  test() {
    A a = new A();
    Expect.equals(super != this, !(super == this));
    Expect.equals(super != a, !(super == a));
  }
}

main() {
  A a = new A();
  a.test();
}