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();
}