blob: 89754fd519176eccfb3d4663d4303125b767b1bb [file] [log] [blame]
// 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 final E first
/// Returns the first element.
/// @description Checks that the method returns the first element of the queue.
/// @author kaigorodov
import "../../../Utils/expect.dart";
import "dart:collection";
main() {
DoubleLinkedQueue queue = new DoubleLinkedQueue();
Expect.isTrue(queue.first == 1);
Expect.isTrue(queue.first == 1);
Expect.isTrue(queue.first == null);