| // 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 StreamSubscription<T> listen(void onData(T event), |
| /// {Function onError, void onDone(), bool cancelOnError}) |
| /// If cancelOnError is true, the subscription is ended when the first error is |
| /// reported. The default is false. |
| /// @description Checks that if cancelOnError is true, the subscription is ended |
| /// when the first error is reported. |
| /// @issue #25967 |
| /// @author kaigorodov |
| /// @author a.semenov@unipro.ru |
| |
| library listen_A04_t01; |
| import "dart:async"; |
| import "../../../Utils/expect.dart"; |
| |
| void check<T>(Stream<T> s, List<T> data, List errors) { |
| List<T> dataSink = []; |
| List errorSink = []; |
| asyncStart(); |
| s.listen( |
| (T event) { |
| dataSink.add(event); |
| }, |
| onError: (Object error) { |
| errorSink.add(error); |
| // wait for possible additional error |
| new Future.delayed(durationMs(500), (){ |
| Expect.listEquals(data, dataSink); |
| Expect.listEquals(errors, errorSink); |
| asyncEnd(); |
| }); |
| }, |
| onDone: () { |
| // onDone is only called if there were no errors |
| Expect.listEquals(data, dataSink); |
| Expect.listEquals(errors, errorSink); |
| asyncEnd(); |
| }, |
| cancelOnError: true |
| ); |
| } |
| |
| void test(CreateStreamWithErrorsFunction create) { |
| check(create([], defVal: 42), [], []); |
| check(create([1, 2, 3, 4], isError:(x) => false, defVal: 42), [1, 2, 3, 4], []); |
| check(create([1, 2, 3, 4], isError:(x) => true, defVal: 42), [], [1]); |
| check<int>(create([1, 2, 3, 4], isError:(x) => x.isOdd, defVal: 42), [], [1]); |
| check<int>(create([1, 2, 3, 4], isError:(x) => x.isEven, defVal: 42), [1], [2]); |
| check( |
| create([null, "2", -3, 4.0, []], isError:(x) => x is num, defVal: 42), |
| [null, "2"], |
| [-3] |
| ); |
| } |