| /* |
| * 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); |
| } |