| // Copyright (c) 2017, 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 Future<RawSocketEvent> single |
| /// The single element of this stream. |
| /// . . . |
| /// If this is empty or has more than one element throws a StateError. |
| /// |
| /// @description Checks that if this has more than one element a StateError is |
| /// thrown. |
| /// @author ngl@unipro.ru |
| |
| import "dart:async"; |
| import "dart:io"; |
| import "../../../Utils/expect.dart"; |
| |
| check([bool no_write_events = false]) { |
| asyncStart(); |
| var address = InternetAddress.loopbackIPv4; |
| RawDatagramSocket.bind(address, 0).then((producer) { |
| RawDatagramSocket.bind(address, 0).then((receiver) { |
| if (no_write_events) { |
| receiver.writeEventsEnabled = false; |
| } |
| int sent = 0; |
| bool stError = false; |
| |
| new Timer.periodic(const Duration(microseconds: 1), (timer) { |
| if (sent == 1) { |
| timer.cancel(); |
| producer.close(); |
| receiver.close(); |
| } else { |
| producer.send([sent], address, receiver.port); |
| sent++; |
| } |
| }); |
| |
| void action() { |
| Expect.isTrue(stError); |
| asyncEnd(); |
| } |
| |
| receiver.single.then((event) { |
| Expect.fail('Future should be completed with error.'); |
| }, onError: (error) { |
| Expect.isTrue(error is StateError); |
| stError = true; |
| }).whenComplete(action); |
| }); |
| }); |
| } |
| |
| main() { |
| check(); |
| check(true); |
| } |