| /* |
| * 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> take(int count) |
| * Provides at most the first n values of this stream. |
| * Forwards the first n data events of this stream, and all error events, |
| * to the returned stream, and ends with a done event. |
| * If this stream produces fewer than count values before it's done, |
| * so will the returned stream. |
| * @description Checks that at most n elements are returned. |
| * @author kaigorodov |
| */ |
| |
| import "dart:async"; |
| import "../../../Utils/async_utils.dart"; |
| import "../../../Utils/expect.dart"; |
| import "IsolateStream.dart" as IsolateStream; |
| |
| void check(List data, int count) { |
| Stream s=IsolateStream.fromIterable(data); |
| Stream t=s.take(count); |
| int seen=0; |
| asyncStart(); |
| t.listen((value){ |
| Expect.isTrue(seen<count, "seen=$seen, count=$count"); |
| Expect.deepEquals(data[seen], value); |
| seen++; |
| }, |
| onDone: (){ |
| asyncEnd(); |
| } |
| ); |
| } |
| |
| main() { |
| check([],0); |
| check([],1); |
| check([],10); |
| check([null], 0); |
| check([null], 1); |
| check([null], 2); |
| check([1,2,3], 0); |
| check([1,2,3], 1); |
| check([1,2,3], 2); |
| check([1,2,3], 12); |
| check([[],[[]],[[[]]]], 2); |
| } |
| |