| // 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 Stream<RawSocketEvent> distinct([bool equals(T previous, T next)]) |
| /// Skips data events if they are equal to the previous data event. |
| /// . . . |
| /// The returned stream is a broadcast stream if this stream is. If a broadcast |
| /// stream is listened to more than once, each subscription will individually |
| /// perform the equals test. |
| /// |
| /// @description Checks that the returned stream is a broadcast stream if this |
| /// stream is, and if a broadcast stream is listened to more than once, each |
| /// subscription will individually perform the equals test. |
| /// @author ngl@unipro.ru |
| |
| import "dart:async"; |
| import "dart:io"; |
| import "../http_utils.dart"; |
| import "../../../Utils/expect.dart"; |
| |
| var localhost = InternetAddress.loopbackIPv4; |
| |
| Future<List> checkDistant() async { |
| RawDatagramSocket producer = await RawDatagramSocket.bind(localhost, 0); |
| RawDatagramSocket receiver = await RawDatagramSocket.bind(localhost, 0); |
| List<List<int>> toSend = [[0, 1, 2, 3], [1, 2, 3], [2, 3], [3], [4, 5], [5]]; |
| List<RawSocketEvent> received1 = []; |
| List<RawSocketEvent> received2 = []; |
| List<RawSocketEvent> received3 = []; |
| List<int> received = [0, 0, 0, 0]; |
| Completer<List<int>> completer = new Completer<List<int>>(); |
| Future<List<int>> f = completer.future; |
| Duration delay = const Duration(seconds: 2); |
| |
| bool wasSent = await sendDatagram(producer, toSend, localhost, receiver.port); |
| Expect.isTrue(wasSent, "No datagram was sent"); |
| |
| Stream bcs = receiver.asBroadcastStream(); |
| Expect.isTrue(bcs.isBroadcast); |
| Stream s = bcs.distinct((previous, next) => previous == next); |
| Expect.isTrue(s.isBroadcast); |
| s.listen((event) { |
| received1.add(event); |
| }); |
| s.listen((event) { |
| received2.add(event); |
| }); |
| s.listen((event) { |
| received3.add(event); |
| }); |
| bcs.listen((event) { |
| receiver.receive(); |
| received[0]++; |
| if (event == RawSocketEvent.closed) { |
| if (!completer.isCompleted) { |
| completer.complete(received); |
| } |
| } |
| }, onDone: () { |
| received[1] = received1.length; |
| received[2] = received2.length; |
| received[3] = received3.length; |
| }); |
| |
| new Future.delayed(delay, () { |
| if (!completer.isCompleted) { |
| receiver.close(); |
| } |
| }); |
| return f; |
| } |
| |
| main() async { |
| int attempts = 5; |
| int expectedLen = 3; |
| |
| for (int i = 0; i < attempts; i++) { |
| List list = await checkDistant(); |
| if (list[0] == 0 || list[1] == 0 || list[2] == 0 || list[3] == 0) { |
| continue; |
| } |
| if (list[1] > expectedLen || |
| list[2] > expectedLen || |
| list[3] > expectedLen) { |
| Expect.fail( |
| "Some distinct events ${list.sublist(1)} is greater then $expectedLen."); |
| } |
| if (list[0] > list[1] && list[0] > list[2] && list[0] > list[3]) { |
| break; |
| } |
| if (i == attempts - 1) { |
| print( |
| 'Received events ${list[0]}, distinct events ${list.sublist(1)}. Look like test failed.'); |
| } |
| } |
| } |