| // 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. |
| |
| // @dart = 2.9 |
| |
| /// @assertion Stream<S> expand<S>(Iterable<S> convert(T value)) |
| /// Creates a new stream from this stream that converts each element into zero |
| /// or more events. |
| /// . . . |
| /// The returned stream is a broadcast stream if this stream is. |
| /// |
| /// @description Checks that the returned stream is a broadcast stream if this |
| /// stream is. |
| /// @author ngl@unipro.ru |
| |
| import "dart:io"; |
| import "dart:async"; |
| import "../../../Utils/expect.dart"; |
| |
| var localhost = InternetAddress.loopbackIPv4; |
| |
| main() async { |
| RawDatagramSocket socket = await RawDatagramSocket.bind(localhost, 0); |
| Stream bcs = socket.asBroadcastStream(); |
| Stream stream1 = socket.expand((e) => [1, 2, 3]); |
| Expect.isFalse(stream1.isBroadcast); |
| Stream stream2 = bcs.expand((e) => [1, 2]); |
| Expect.isTrue(stream2.isBroadcast); |
| socket.close(); |
| } |