| /* |
| * 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 all error events are returned. Checks that |
| * the resulting stream ends with a done event. |
| * @author kaigorodov |
| */ |
| |
| import "dart:async"; |
| import "../../../Utils/async_utils.dart"; |
| import "../../../Utils/expect.dart"; |
| import "IsolateStream.dart" as IsolateStream; |
| |
| void check(int eventCount, int takeCount) { |
| Iterable it=new Iterable.generate(eventCount, (int index)=>index); |
| Stream s = IsolateStream.fromIterable(it).map((x) => throw new ArgumentError(x)); |
| Stream t=s.take(takeCount); |
| int seenCount=0; |
| asyncStart(); |
| t.listen((value){ |
| Expect.fail("datum not expected"); |
| }, |
| onError: (error) { |
| Expect.isTrue(error is ArgumentError, error.toString()); |
| var message=(error as ArgumentError).message; |
| Expect.equals(seenCount, message); |
| seenCount++; |
| }, |
| onDone: () { |
| Expect.equals(eventCount, seenCount); |
| asyncEnd(); |
| } |
| ); |
| } |
| |
| main() { |
| check(0,0); |
| check(0,1); |
| check(1,0); |
| check(1,1); |
| check(2,3); |
| } |
| |