| // Copyright (c) 2018, 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<RawSocketEvent> listen( |
| /// void onData( |
| /// T event |
| /// ), { |
| /// Function onError, |
| /// void onDone(), |
| /// bool cancelOnError |
| /// }) |
| /// Adds a subscription to this stream. |
| /// . . . |
| /// While a subscription is paused, or when it has been cancelled, the |
| /// subscription doesn't receive events and none of the event handler functions |
| /// are called. |
| /// |
| /// @description Checks that while a subscription is paused, the subscription |
| /// doesn't receive events and none of the event handler functions are called. |
| /// @author ngl@unipro.ru |
| |
| import "dart:io"; |
| import "dart:async"; |
| import "../../../Utils/expect.dart"; |
| |
| check(int n) { |
| asyncStart(); |
| var address = InternetAddress.loopbackIPv4; |
| RawDatagramSocket.bind(address, 0).then((producer) { |
| RawDatagramSocket.bind(address, 0).then((receiver) { |
| StreamSubscription? ss1 = null; |
| StreamSubscription? ss2 = null; |
| int counter1 = 0; |
| int counter2 = 0; |
| int counter = 0; |
| for (int i = 0; i < 9; i++) { |
| producer.send([i], address, receiver.port); |
| } |
| producer.close(); |
| |
| Stream bcs = receiver.asBroadcastStream(); |
| new Timer(const Duration(milliseconds: 200), () { |
| Expect.isNull(receiver.receive()); |
| receiver.close(); |
| }); |
| |
| ss1 = bcs.listen((event) { |
| counter1++; |
| }, onError: (e) { |
| Expect.fail('Should not be here.'); |
| }, onDone: () { |
| if (ss1 != null && ss1.isPaused) { |
| Expect.fail('Should not be here.'); |
| } |
| }); |
| |
| bcs.listen((event) { |
| counter++; |
| receiver.receive(); |
| if (counter == n) { |
| ss1?.pause(); |
| ss2?.pause(); |
| } |
| if (counter == 9) { |
| Expect.isTrue(counter1 <= n); |
| Expect.equals(counter, 9); |
| Expect.isTrue(counter2 <= n); |
| ss1?.resume(); |
| ss2?.resume(); |
| } |
| }, onDone: () { |
| asyncEnd(); |
| }); |
| |
| ss2 = bcs.listen((event) { |
| counter2++; |
| }, onError: (e) { |
| Expect.fail('Should not be here.'); |
| }, onDone: () { |
| if (ss2 != null && ss2.isPaused) { |
| Expect.fail('Should not be here.'); |
| } |
| }); |
| }); |
| }); |
| } |
| |
| main() { |
| for (int i = 1; i < 10; i ++) { |
| check(i); |
| } |
| } |