| // 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.fromIterable(Iterable<T> data) |
| /// If iterating data throws an error, the stream ends immediately with that |
| /// error. No done event will be sent (iteration is not complete), but no |
| /// further data events will be generated either, since iteration cannot |
| /// continue. |
| /// @description Checks that if iterating throws an error, onError callback |
| /// is run with this error. Also checks that data events are neither further |
| /// generated nor fired and onDone event does not happen. |
| /// @author ilya |
| |
| import "dart:async"; |
| import "../../../Utils/expect.dart"; |
| |
| int f(int i) { |
| if (i < 5) return i; |
| if (i == 5) throw i; |
| if (i > 5) Expect.fail('data generation did not stop'); |
| return 42; |
| } |
| |
| main() { |
| Iterable<int> it = new Iterable<int>.generate(10, (int i) => f(i)); |
| Stream<int> s = new Stream<int>.fromIterable(it); |
| List events = []; |
| asyncStart(); |
| |
| s.listen((int x) { |
| events.add(x); |
| }, onError: (error) { |
| events.add(error); |
| // wait some time for additional (wrong) events |
| new Future.delayed(durationInMilliseconds(500), () { |
| Expect.listEquals([0, 1, 2, 3, 4, 5, "done"], events); |
| asyncEnd(); |
| }); |
| }, onDone: () { |
| events.add("done"); |
| }); |
| } |