LibTest/core/Object/Object_A02_t01.dart

// Copyright (c) 2016, 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 const Object()
/// Creates a new Object instance.
/// Object instances have no meaningful state, and are only useful through their
/// identity. An Object instance is equal to itself only.
/// @description Checks that a new Object instance is equal to itself only
/// @author sgrekhov@unipro.ru

import "../../../Utils/expect.dart";

main() {
  var o1 = new Object();
  var o2 = new Object();
  Expect.isFalse(o1 == o2);
  Expect.equals(o1, o1);

  const o3 = const Object();
  const o4 = const Object();
  Expect.isTrue(o3 == o4);
  Expect.equals(o3, o3);

  const c1 = const C(1);
  const c2 = const C(1);
  Expect.isTrue(c1 == c2);
}

class C {
  final m;
  const C(this.m);
}