DO NOT SUBMIT: Unix domain sockets. From CL 1061283003.

tests/standalone/io/socket_info_test.dart

 // Copyright (c) 2013, 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 "package:expect/expect.dart";
 import "dart:io";
 
+import 'package:async_helper/async_helper.dart';
+import "package:expect/expect.dart";
+
 void testHostAndPort() {
+  asyncStart();
   ServerSocket.bind("127.0.0.1", 0).then((server) {
 
     Socket.connect("127.0.0.1", server.port).then((clientSocket) {
       server.listen((socket) {
         Expect.equals(socket.port, server.port);
         Expect.equals(clientSocket.port, socket.remotePort);
         Expect.equals(clientSocket.remotePort, socket.port);
         Expect.equals(socket.remoteAddress.address, "127.0.0.1");
         Expect.equals(clientSocket.remoteAddress.address, "127.0.0.1");
         socket.destroy();
         clientSocket.destroy();
         server.close();
+        asyncEnd();
       });
     });
   });
 }
 
+void withTempDir(String prefix, void test(Directory dir)) async {
+  var tempDir = Directory.systemTemp.createTempSync(prefix);
+  try {
+    await test(tempDir);
+  } finally {
+    tempDir.deleteSync(recursive: true);
+  }
+}
+
+Future testHostAndPortUds(Directory dir) async {
+  asyncStart();
+  var address = new UnixDomainAddress('${dir.path}/xxx');
+  var server = await ServerSocket.bind(address, 0);
+  var client = await Socket.connect(address, server.port);
+  server.listen((socket) {
+    Expect.equals(socket.port, 1);
+    Expect.equals(socket.port, server.port);
+    Expect.equals(client.port, socket.remotePort);
+    Expect.equals(client.remotePort, socket.port);
+    Expect.isTrue(socket.remoteAddress is UnixDomainAddress);
+    Expect.equals(socket.remoteAddress.path, '.');
+    Expect.equals(client.remoteAddress.path, address.path);
+    socket.destroy();
+    client.destroy();
+    server.close();
+    asyncEnd();
+  });
+}
+
 void main() {
   testHostAndPort();
+  if (!Platform.isWindows) {
+    withTempDir('socket_info_test', testHostAndPortUds);
+  }
 }