| // 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<RawSocketEvent> skip(int count) |
| /// Skips the first count data events from this stream. |
| /// |
| /// Returns a stream that emits the same events as this stream would if listened |
| /// to at the same time, except that the first count data events are not emitted. |
| /// The returned stream is done when this stream is. |
| /// |
| /// If this stream emits fewer than count data events before being done, the |
| /// returned stream emits no data events. |
| /// |
| /// @description Checks that method [skip] skips the first count data events from |
| /// this stream, and if this stream emits fewer than count data events before |
| /// being done, the returned stream emits no data events. |
| /// @author ngl@unipro.ru |
| |
| import "dart:io"; |
| import "dart:async"; |
| import "../../../Utils/expect.dart"; |
| |
| check(n) { |
| asyncStart(); |
| var address = InternetAddress.loopbackIPv4; |
| RawDatagramSocket.bind(address, 0).then((producer) { |
| RawDatagramSocket.bind(address, 0).then((receiver) { |
| int sent = 0; |
| int counter = 0; |
| List resultList = []; |
| List list = []; |
| producer.send([sent++], address, receiver.port); |
| producer.send([sent++], address, receiver.port); |
| producer.send([sent++], address, receiver.port); |
| producer.send([sent++], address, receiver.port); |
| producer.close(); |
| |
| Stream bcs = receiver.asBroadcastStream(); |
| Stream s = bcs.skip(n); |
| s.listen((event) { |
| resultList.add(event); |
| }).onDone(() { |
| List expected = n > counter ? [] : list.sublist(n); |
| Expect.listEquals(expected, resultList); |
| asyncEnd(); |
| }); |
| |
| bcs.listen((event) { |
| list.add(event); |
| receiver.receive(); |
| counter++; |
| }); |
| |
| new Timer(const Duration(milliseconds: 200), () { |
| Expect.isNull(receiver.receive()); |
| receiver.close(); |
| }); |
| }); |
| }); |
| } |
| |
| main() { |
| check(0); |
| check(1); |
| check(2); |
| check(3); |
| check(4); |
| check(5); |
| check(10); |
| } |