| // 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 Future<bool> any(bool test(T element)) |
| * Checks whether test accepts any element provided by this stream. |
| * |
| * Calls test on each element of the stream. If the call returns true, the |
| * returned future is completed with true and processing stops. |
| * |
| * @description Checks whether test accepts any element provided by this stream |
| * and stops listening to the stream after the first matching element has been |
| * found. |
| * @author ngl@unipro.ru |
| */ |
| import "dart:async"; |
| import "dart:io"; |
| import "../http_utils.dart"; |
| import "../../../Utils/expect.dart"; |
| |
| var localhost = InternetAddress.loopbackIPv4; |
| |
| Future<List<RawSocketEvent>> anyElement(RawDatagramSocket receiver, |
| int expectedCount, {Duration delay = const Duration(seconds: 2)}) { |
| List<RawSocketEvent> tested = []; |
| Completer<List<RawSocketEvent>> completer = |
| new Completer<List<RawSocketEvent>>(); |
| Future<List<RawSocketEvent>> f = completer.future; |
| |
| bool test(x) { |
| tested.add(x); |
| receiver.receive(); |
| if (x == RawSocketEvent.closed) { |
| if (!completer.isCompleted) { |
| completer.complete(tested); |
| } |
| } |
| return tested.length == expectedCount; |
| } |
| |
| receiver.any((event) => test(event)).then((value) { |
| Expect.equals(true, value); |
| if (!completer.isCompleted) { |
| receiver.close(); |
| completer.complete(tested); |
| } |
| }); |
| |
| new Future.delayed(delay, () { |
| if (!completer.isCompleted) { |
| receiver.close(); |
| } |
| }); |
| return f; |
| } |
| |
| main() 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]]; |
| |
| bool wasSent = |
| await sendDatagram(producer, toSend, localhost, receiver.port); |
| Expect.isTrue(wasSent, "No datagram was sent"); |
| |
| List<RawSocketEvent> tested = await anyElement(receiver, 2); |
| Expect.equals(2, tested.length); |
| } |