// 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.

// @dart = 2.9

/// @assertion new DoubleLinkedQueueEntry()
/// Creates a DoubleLinkedQueueEntry object
/// @description Checks that DoubleLinkedQueueEntry with null element is
/// created.
/// @author sgrekhov@unipro.ru

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

main() {
  DoubleLinkedQueueEntry entry = new DoubleLinkedQueueEntry(null);
  Expect.isTrue(entry is DoubleLinkedQueueEntry);
  Expect.isNull(entry.element);
}