| // 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 Stream<T> takeWhile(bool test(T element)) |
| /// Forwards data events while test is successful. |
| /// The returned stream provides the same events as this stream as long as test |
| /// returns true for the event data. |
| /// The stream is done when either this stream is done, or when this stream first |
| /// provides a value that test doesn't accept. |
| /// @description Checks that only first elements that passed the test are |
| /// returned. |
| /// @author kaigorodov |
| /// @author a.semenov@unipro.ru |
| |
| library takeWhile_A01_t01; |
| import "../../../Utils/expect.dart"; |
| |
| void test(CreateStreamFunction create) { |
| AsyncExpect.data([], create([]).takeWhile((_) => false)); |
| AsyncExpect.data( |
| [-1, -2, -3], |
| create([-1, -2, -3, 1, 2, 3, -1, -2, -3]).takeWhile((x) => x < 0) |
| ); |
| AsyncExpect.data([1, 2, 3], create([1, 2, 3]).takeWhile((element) => true)); |
| AsyncExpect.data([1], create([1, 2, 3, 1]).takeWhile((element) => element == 1)); |
| AsyncExpect.data([], create([1, 2, 3]).takeWhile((element) => false)); |
| } |