| // 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 Future<bool> isEmpty |
| /// Whether this stream contains any elements. |
| /// Waits for the first element of this stream, then completes the returned |
| /// future with `true`. |
| /// If the stream ends without emitting any elements, the returned future is |
| /// completed with `false`. |
| /// @description Checks that the method returns whether this stream contains any |
| /// elements. |
| /// @author kaigorodov |
| |
| library isEmpty_A01_t01; |
| import "../../../Utils/expect.dart"; |
| |
| void test(CreateStreamFunction create) { |
| AsyncExpect.value(true, create([]).isEmpty); |
| AsyncExpect.value(false, create([1, 2, 3, null]).isEmpty); |
| AsyncExpect.value(true, create(new Iterable.generate(0, (int index) => 1)).isEmpty); |
| AsyncExpect.value(false, create(new Iterable.generate(10, (int index) => 1)).isEmpty); |
| } |