| // 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 E removeFirst() |
| /// The queue must not be empty when this method is called. |
| /// @description Checks that exception is thrown if the queue is empty. |
| /// @author kaigorodov |
| |
| import "dart:collection"; |
| import "../../../Utils/expect.dart"; |
| |
| check(List list) { |
| DoubleLinkedQueue queue = new DoubleLinkedQueue.from(list); |
| while(queue.length > 0) { |
| Expect.equals(queue.removeFirst(), list[0]); |
| Expect.equals(queue.length, list.length - 1); |
| list.removeAt(0); |
| int i = 0; |
| queue.forEach((var element) { |
| Expect.equals(list[i++], element); |
| }); |
| } |
| } |
| |
| main() { |
| DoubleLinkedQueue queue = new DoubleLinkedQueue(); |
| |
| Expect.throws(() { queue.removeFirst(); }, (e) => e is StateError); |
| |
| queue.addLast(1); |
| queue.addLast(2); |
| queue.clear(); |
| |
| Expect.throws(() { queue.removeFirst(); }, (e) => e is StateError); |
| } |