| /* |
| * 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<S> expand<S>(Iterable<S> convert(T value)) |
| * Transforms each element of this stream into a sequence of elements. |
| * |
| * Returns a new stream where each element of this stream is replaced by zero or |
| * more data events. The event values are provided as an Iterable by a call to |
| * convert with the element as argument, and the elements of that iterable is |
| * emitted in iteration order. |
| * |
| * @description Checks that method [expand] returns a new stream where each |
| * element of this stream is replaced by zero or more data 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> checkExpand(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]]; |
| Completer<List> completer = new Completer<List>(); |
| Future<List> f = completer.future; |
| Duration delay = const Duration(seconds: 2); |
| List received = []; |
| List receivedEvents = []; |
| |
| bool wasSent = await sendDatagram(producer, toSend, localhost, receiver.port); |
| Expect.isTrue(wasSent, "No datagram was sent"); |
| |
| Stream<RawSocketEvent> bcs = receiver.asBroadcastStream(); |
| Stream s = bcs.expand(convert); |
| Future list = s.toList(); |
| |
| list.then((value) { |
| received = value; |
| }).whenComplete(() { |
| if (!completer.isCompleted) { |
| completer.complete(received); |
| } |
| return f; |
| }); |
| |
| bcs.listen((event) { |
| receivedEvents.add(event); |
| receiver.receive(); |
| }); |
| |
| new Future.delayed(delay, () { |
| if (!completer.isCompleted) { |
| receiver.close(); |
| } |
| }); |
| |
| return f; |
| } |
| |
| main() async { |
| int attempts = 5; |
| |
| toCheck(convert, List expected, int newReplaced) async { |
| for (int i = 0; i < attempts; i++) { |
| List list = await checkExpand(convert); |
| int recLength = list.length; |
| |
| if (recLength == newReplaced && recLength == 0) { |
| break; |
| } |
| bool notFound = false; |
| if (recLength > 0 || recLength >= newReplaced) { |
| if (newReplaced == 1) { |
| for (int i = 0; i < list.length; i++) { |
| if (list[i] != expected[0] && list[i] != expected[1] && |
| list[i] != expected[2]) { |
| notFound = true; |
| break; |
| } |
| } |
| if (!notFound) { |
| break; |
| } |
| } |
| if (newReplaced == 2) { |
| for (int i = 0; i < list.length; i++) { |
| if (list[i] != expected[0] && list[i] != expected[1] && |
| list[i] != expected[2]) { |
| notFound = true; |
| break; |
| } |
| if (i + 1 >= recLength) { |
| notFound = true; |
| break; |
| } |
| if (list[i + 1] != list[i]) { |
| notFound = true; |
| break; |
| } |
| i++; |
| } |
| if (!notFound) { |
| break; |
| } |
| } |
| if (newReplaced == 3) { |
| for (int i = 0; i < list.length; i += 3) { |
| if (i + 1 >= recLength && i + 2 >= recLength) { |
| notFound = true; |
| break; |
| } |
| if (list[i] != expected[0] || list[i + 1] != expected[1] || |
| list[i + 2] != expected[2]) { |
| notFound = true; |
| break; |
| } |
| } |
| if (!notFound) { |
| break; |
| } |
| } |
| } |
| |
| if (i == attempts - 1) { |
| print('$recLength elements not found. Look like test failed.'); |
| } |
| } |
| } |
| |
| await toCheck((e) => [], [], 0); |
| await toCheck((e) => [e], |
| [RawSocketEvent.write, RawSocketEvent.read, RawSocketEvent.closed], 1); |
| await toCheck((e) => [e, e], |
| [RawSocketEvent.write, RawSocketEvent.read, RawSocketEvent.closed], 2); |
| await toCheck((e) => [1, 2, 3], [1, 2, 3], 3); |
| } |