| // 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 final Future<bool> isEmpty |
| /// Reports whether this stream contains any elements. |
| /// @description Checks that the method returns whether this stream contains any elements. |
| /// @author kaigorodov |
| |
| import "../../../Utils/expect.dart"; |
| import "IsolateStream.dart" as IsolateStream; |
| |
| check(Iterable<int?> data, bool expected) { |
| asyncStart(); |
| IsolateStream.fromIterable(data).isEmpty.then((bool actual) { |
| Expect.equals(expected, actual); |
| asyncEnd(); |
| }); |
| } |
| |
| main() { |
| check([], true); |
| check([1, 2, 3, null], false); |
| check(new Iterable.generate(0, (int index) => 1), true); |
| check(new Iterable.generate(10, (int index) => 1), false); |
| } |