LibTest/collection/DoubleLinkedQueue/firstWhere_A03_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.

/**
 * @assertion dynamic firstWhere(bool test(E value), {Object orElse()})
 * By default, when [orElse] is [null], a StateError is thrown.
 * @description Checks that a StateError is thrown when orElse is null and none
 * matches.
 * @author kaigorodov
 */

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

check(List list) {
  DoubleLinkedQueue queue = new DoubleLinkedQueue.from(list);
  Expect.throws(() { queue.firstWhere((var value) => false); },
      (e) => e is StateError
  );
}

main() {
  check(new List.empty());
  check([]);
  check(const[]);
  check(new List.from([]));
  check([1, 2, 3]);
}