| // 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> take(int count) |
| * Provides at most the first count data events of this stream. |
| * . . . |
| * If this is a broadcast stream, the returned stream is a broadcast stream. |
| * In that case, the events are only counted from the time the returned stream |
| * is listened to. |
| * |
| * @description Checks that the events are only counted from the time the |
| * returned stream is listened to. |
| * @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) { |
| int sent = 0; |
| int counter = 0; |
| int count = 0; |
| producer.send([sent++], address, receiver.port); |
| producer.send([sent++], address, receiver.port); |
| producer.send([sent++], address, receiver.port); |
| producer.close(); |
| |
| Stream bcs = receiver.asBroadcastStream(); |
| |
| Stream s = bcs.take(n); |
| s.listen((event) { |
| count++; |
| }, onDone: () { |
| Expect.equals(n > 4 ? 4 : n, count); |
| asyncEnd(); |
| }); |
| |
| bcs.listen((event) { |
| receiver.receive(); |
| counter++; |
| }).onDone(() { |
| Expect.equals(4, counter); |
| }); |
| |
| new Timer(const Duration(milliseconds: 200), () { |
| Expect.isNull(receiver.receive()); |
| receiver.close(); |
| }); |
| }); |
| }); |
| } |
| |
| main() { |
| for (int i = 0; i < 9; i++) { |
| check(i); |
| } |
| } |