| /* |
| * 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> lastWhere(bool test(T element), {Object defaultValue()}) |
| * Finds the last element in this stream matching test. |
| * As firstWhere, except that the last matching element is found. |
| * That means that the result cannot be provided before this stream is done. |
| * @description Checks that if this stream ends without finding a match and with no defaultValue |
| * function provided, the future will receive an error. |
| * @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)) { |
| Stream s=IsolateStream.fromIterable(data); |
| asyncStart(); |
| s.lastWhere(test).then( |
| (data) { |
| Expect.fail("data passed: $data"); |
| }, |
| onError: (error) { |
| Expect.isTrue(error is Error); |
| asyncEnd(); |
| } |
| ); |
| } |
| |
| main() { |
| check([], (int element)=>true); |
| check([1,2,3], (int element)=>element=null); |
| check([null,null], (int element)=>element!=null); |
| check(new Iterable.generate(0, (int index)=>index), (int element)=>false); |
| check(new Iterable.generate(10, (int index)=>index), (int element)=>false); |
| check(new Iterable.generate(10, (int index)=>index*5), (int element)=>element<0); |
| check(new Iterable.generate(10, (int index)=>index*5), (int element)=>element==300); |
| } |