| // 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 StreamController({void onListen(), void onPause(), |
| /// void onResume(), dynamic onCancel(), bool sync: false}) |
| /// The controller buffers all incoming events until a subscriber is registered, |
| /// but this feature should only be used in rare circumstances. |
| /// |
| /// @description Checks that the controller will buffer all incoming data and |
| /// errors until the subscriber is registered. |
| /// @author a.semenov@unipro.ru |
| |
| import "dart:async"; |
| import "../../../Utils/expect.dart"; |
| |
| void check(List source) { |
| StreamController controller = new StreamController(); |
| Stream s = controller.stream; |
| List expectedData = source.where((e) => !(e is num) || e >= 0).toList(); |
| List expectedErrors = source.where((e) => e is num && e < 0).toList(); |
| List sink = []; |
| List errorSink = []; |
| |
| for (var event in source) { |
| if (event is num && event < 0) { |
| controller.addError(event); |
| } else { |
| controller.add(event); |
| } |
| } |
| |
| Expect.isTrue(sink.isEmpty); |
| Expect.isTrue(errorSink.isEmpty); |
| |
| asyncStart(); |
| s.listen((event) { |
| sink.add(event); |
| }, onError: (error) { |
| errorSink.add(error); |
| }, onDone: () { |
| Expect.listEquals(expectedData, sink); |
| Expect.listEquals(expectedErrors, errorSink); |
| asyncEnd(); |
| }); |
| |
| controller.close(); |
| } |
| |
| main() { |
| check([]); |
| check([-1, -2, -3, -4, -5]); |
| check([1, 2, -3, 4, -5, 6, 7, -8, 9, 0]); |
| } |