| /* |
| * 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<dynamic> firstWhere(bool test(T element), {Object defaultValue()}) |
| * If no such element is found before this stream is done, and a defaultValue function is provided, |
| * the result of calling defaultValue becomes the value of the future. |
| * @description Checks that if this stream ends without finding a match and a defaultValue |
| * function is provided, the result of calling defaultValue becomes the value of the future. |
| * @author kaigorodov |
| */ |
| |
| import "dart:async"; |
| import "../../../Utils/async_utils.dart"; |
| import "../../../Utils/expect.dart"; |
| import "IsolateStream.dart" as IsolateStream; |
| |
| check(Iterable data, bool test(int element), int expected) { |
| Stream s=IsolateStream.fromIterable(data); |
| asyncStart(); |
| Future f=s.firstWhere(test, defaultValue: ()=>expected); |
| f.then((int actual){ |
| Expect.equals(expected, actual); |
| asyncEnd(); |
| }); |
| } |
| |
| main() { |
| check([], (int element)=>true, 1); |
| check([1,2,3], (int element)=>element==null, null); |
| check(new Iterable.generate(0, (int index)=>index), (int element)=>false, 0); |
| check(new Iterable.generate(0, (int index)=>index), (int element)=>true, 0); |
| check(new Iterable.generate(10, (int index)=>index), (int element)=>false, 22); |
| check(new Iterable.generate(10, (int index)=>index*5), (int element)=>element<0, 33); |
| } |