| // 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<int>> anyElement(RawDatagramSocket receiver, int expectedValue, |
| bool shouldFind, {Duration delay = const Duration(seconds: 2)}) { |
| List<int> tested = []; |
| Completer<List<int>> completer = new Completer<List<int>>(); |
| Future<List<int>> f = completer.future; |
| |
| bool test(RawSocketEvent x) { |
| var d = receiver.receive(); |
| if (d != null) { |
| tested.add(d.data[0]); |
| return d.data[0] == expectedValue; |
| } else { |
| return false; |
| } |
| } |
| |
| 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(); |
| completer.complete(tested); |
| } |
| }); |
| return f; |
| } |
| |
| check(int expectedValue, {int attempts = 5}) async { |
| RawDatagramSocket producer = await RawDatagramSocket.bind(localhost, 0); |
| RawDatagramSocket receiver = await RawDatagramSocket.bind(localhost, 0); |
| List<List<int>> toSend = [[0], [1], [2], [3]]; |
| List<int> tested = []; |
| if (expectedValue >= toSend.length) { |
| return; |
| } |
| |
| List<int> bytesSent = []; |
| for (int i = 0; i < attempts; i++) { |
| bytesSent = |
| await sendDatagramOnce(producer, toSend, localhost, receiver.port); |
| if (bytesSent[expectedValue] == 1) { |
| producer.close(); |
| break; |
| } |
| } |
| Expect.isTrue(bytesSent[expectedValue] == 1, "Required datagram wasn't sent"); |
| |
| tested = await anyElement(receiver, expectedValue, true); |
| Expect.isTrue(tested.length > 0); |
| Expect.equals(expectedValue, tested[tested.length - 1]); |
| if (tested.length > 1) { |
| checkTested<int>(tested, expectedValue); |
| } |
| } |
| |
| main() { |
| for (int i = 0; i < 4; i++) { |
| check(i); |
| } |
| } |