| // 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<E> asyncMap<E>(FutureOr convert(T event)) |
| /// Creates a new stream with each data event of this stream asynchronously |
| /// mapped to a new event. |
| /// |
| /// This acts like map, except that convert may return a Future, and in that |
| /// case, the stream waits for that future to complete before continuing with its |
| /// result. |
| /// |
| /// @description Checks that a new stream contains expected events. |
| /// @author ngl@unipro.ru |
| |
| import "dart:async"; |
| import "dart:io"; |
| import "../http_utils.dart"; |
| import "../../../Utils/expect.dart"; |
| |
| var localhost = InternetAddress.loopbackIPv4; |
| |
| Future<List> asyncMapAndClose(convert) 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]]; |
| List received = []; |
| Completer<List> completer = new Completer<List>(); |
| Future<List> f = completer.future; |
| |
| bool wasSent = await sendDatagram(producer, toSend, localhost, receiver.port); |
| Expect.isTrue(wasSent, "No datagram was sent"); |
| |
| receiver.close(); |
| |
| Stream s = receiver.asyncMap(convert); |
| s.listen((value) { |
| received.add(value); |
| }).onDone(() { |
| if (!completer.isCompleted) { |
| completer.complete(received); |
| } |
| }); |
| return f; |
| } |
| |
| main() async { |
| int attempts = 5; |
| int expectedLen = 1; |
| |
| toCheck(convert, expected) async { |
| for (int i = 0; i < attempts; i++) { |
| List list = await asyncMapAndClose(convert); |
| int listLen = list.length; |
| if (listLen == 0) { |
| continue; |
| } |
| if (listLen == expectedLen) { |
| if (list[0] is List) { |
| Expect.listEquals(expected, list[0]); |
| } else { |
| Expect.equals(expected, list[0]); |
| } |
| break; |
| } |
| if (listLen > expectedLen) { |
| Expect.fail("$listLen elements found instead of $expectedLen."); |
| } |
| if (i == attempts - 1) { |
| print('$listLen elements found. Look like test failed.'); |
| } |
| } |
| } |
| |
| toCheck((e) => e, RawSocketEvent.closed); |
| toCheck((e) => [1, 2], [1, 2]); |
| } |