// 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  abstract E removeFirst()
/// The queue must not be empty when this method is called.
/// @description Checks that exception is thrown if this queue is empty.
/// @author msyabro

library removeFirst_A02_t01;

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

test(Queue create([Iterable content])) {
  Queue queue = create();
  
  Expect.throws(() { queue.removeFirst(); }, (e) => e is StateError);
  
  queue.addLast(1);
  queue.addLast(2);
  queue.clear();

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