Add a mDNS package

pkg/mdns/test/lookup_resolver_test.dart

+// Copyright (c) 2015, 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.
+
+import 'dart:io';
+
+import 'package:expect/expect.dart';
+import 'package:mdns/src/packet.dart';
+import 'package:mdns/src/lookup_resolver.dart';
+
+main() async {
+  await testTimeout();
+  await testResult();
+  await testResult2();
+  await testResult3();
+}
+
+testTimeout() async {
+  var shortTimeout = new Duration(milliseconds: 1);
+  var resolver = new LookupResolver();
+  var result = await resolver.addPendingRequest('xxx', shortTimeout);
+  Expect.isNull(result);
+}
+
+// One pending request and one response.
+testResult() async {
+  var noTimeout = new Duration(days: 1);
+  var resolver = new LookupResolver();
+  var futureResult = resolver.addPendingRequest('xxx', noTimeout);
+  var response = new DecodeResult('xxx', new InternetAddress('1.2.3.4'));
+  resolver.handleResponse([response]);
+  var result = await futureResult;
+  Expect.equals('1.2.3.4', result.address);
+}
+
+testResult2() async {
+  var noTimeout = new Duration(days: 1);
+  var resolver = new LookupResolver();
+  var futureResult1 = resolver.addPendingRequest('xxx', noTimeout);
+  var futureResult2 = resolver.addPendingRequest('yyy', noTimeout);
+  var response1 = new DecodeResult('xxx', new InternetAddress('1.2.3.4'));
+  var response2 = new DecodeResult('yyy', new InternetAddress('2.3.4.5'));
+  resolver.handleResponse([response2, response1]);
+  var result1 = await futureResult1;
+  var result2 = await futureResult2;
+  Expect.equals('1.2.3.4', result1.address);
+  Expect.equals('2.3.4.5', result2.address);
+}
+
+testResult3() async {
+  var noTimeout = new Duration(days: 1);
+  var resolver = new LookupResolver();
+  var response0 = new DecodeResult('zzz', new InternetAddress('2.3.4.5'));
+  resolver.handleResponse([response0]);
+  var futureResult1 = resolver.addPendingRequest('xxx', noTimeout);
+  resolver.handleResponse([response0]);
+  var futureResult2 = resolver.addPendingRequest('yyy', noTimeout);
+  resolver.handleResponse([response0]);
+  var response1 = new DecodeResult('xxx', new InternetAddress('1.2.3.4'));
+  resolver.handleResponse([response0]);
+  var response2 = new DecodeResult('yyy', new InternetAddress('2.3.4.5'));
+  resolver.handleResponse([response0]);
+  resolver.handleResponse([response2, response1]);
+  resolver.handleResponse([response0]);
+  var result1 = await futureResult1;
+  var result2 = await futureResult2;
+  Expect.equals('1.2.3.4', result1.address);
+  Expect.equals('2.3.4.5', result2.address);
+}