| // 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 bool any(bool f(E element)) |
| /// Checks whether any element of this iterable satisfies [test]. |
| /// Checks every element in iteration order, and returns [true] if any of them |
| /// make test return [true], otherwise returns [false]. |
| /// @description Checks that the method returns true if at least one element |
| /// of this collection satisfies the predicate test. |
| /// @author kaigorodov |
| |
| import "../../../Utils/expect.dart"; |
| import "dart:collection"; |
| |
| main() { |
| DoubleLinkedQueue queue = new DoubleLinkedQueue(); |
| Expect.isFalse(queue.any((e) => false)); |
| Expect.isFalse(queue.any((e) => true)); |
| Expect.isFalse(queue.any((e) => e == 1)); |
| |
| queue.addFirst(1); |
| Expect.isFalse(queue.any((e) => false)); |
| Expect.isFalse(queue.any((e) => e == 0)); |
| Expect.isTrue(queue.any((e) => e == 1)); |
| |
| queue.addFirst(1); |
| Expect.isTrue(queue.any((e) => e == 1)); |
| |
| queue.addLast(2); |
| Expect.isFalse(queue.any((e) => e == 0)); |
| Expect.isTrue(queue.any((e) => e == 1)); |
| Expect.isTrue(queue.any((e) => e == 2)); |
| } |