LibTest/collection/DoubleLinkedQueue/removeLast_A02_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.

// @dart = 2.9

/// @assertion 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";

main() {
  DoubleLinkedQueue queue = new DoubleLinkedQueue();
  Expect.throws(() { queue.removeLast(); }, (e) => e is StateError);
  
  queue.addLast(1);
  queue.addLast(2);
  queue.clear();

  Expect.throws(() { queue.removeLast(); }, (e) => e is StateError);
}