| // Copyright (c) 2017, 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> isEmpty |
| /// Whether this stream contains any elements. |
| /// |
| /// Waits for the first element of this stream, then completes the returned |
| /// future with true. If the stream ends without emitting any elements, the |
| /// returned future is completed with false. |
| /// |
| /// If the first event is an error, the returned future is completed with that |
| /// error. |
| /// |
| /// This operation listens to the stream, and a non-broadcast stream cannot be |
| /// reused after checking whether it is empty. |
| /// |
| /// @description Checks that if this is empty, the returned future completes |
| /// true. |
| /// @author ngl@unipro.ru |
| |
| import "dart:io"; |
| import "../../../Utils/expect.dart"; |
| |
| check(InternetAddress address) { |
| asyncStart(); |
| SecurityContext sc = new SecurityContext(withTrustedRoots: true); |
| RawSecureServerSocket.bind(address, 0, sc).then((server) { |
| server.isEmpty.then((value) { |
| Expect.isTrue(value); |
| }).whenComplete(() { |
| asyncEnd(); |
| }); |
| server.close(); |
| }); |
| } |
| |
| main() { |
| check(InternetAddress.anyIPv4); |
| check(InternetAddress.anyIPv6); |
| check(InternetAddress.loopbackIPv4); |
| check(InternetAddress.loopbackIPv6); |
| } |