Add the shared flag to HttpServer as well

tests/standalone/io/http_bind_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 'dart:async';
+import 'dart:io';
+import 'dart:convert';
+
+import 'package:async_helper/async_helper.dart';
+import 'package:expect/expect.dart';
+
+testBindShared(String host, bool v6Only) async {
+  asyncStart();
+
+  // Sent a single request using a new HttpClient to ensure a new TCP
+  // connnection is used.
+  Future singleRequest(host, port) async {
+    var client = new HttpClient();
+    var request = await client.open('GET', host, port, '/');
+    var response = await request.close();

[kustermann, 2015/02/17 11:30:56]

Maybe use a specific status code, to ensure we got a correct response?

[Søren Gjesse, 2015/02/17 12:53:11]

Done.

+    await response.drain();
+    client.close(force: true);
+  }
+
+  Completer server1Request = new Completer();
+  Completer server2Request = new Completer();
+
+  var server1 = await HttpServer.bind(host, 0, v6Only: v6Only, shared: true);
+  var port = server1.port;
+  Expect.isTrue(port > 0);
+
+  var server2 = await HttpServer.bind(host, port, v6Only: v6Only, shared: true);
+  Expect.equals(server1.address.address, server2.address.address);
+  Expect.equals(port, server2.port);
+
+  server1.listen((request) async {
+    server1Request.complete();
+    await request.response.close();

[kustermann, 2015/02/17 11:30:56]

You could remove the "async " and "await" here, since the return '.listen()'
expects a callback which returns void IIRC.

[Søren Gjesse, 2015/02/17 12:53:11]

Done.

+  });
+
+  await singleRequest(host, port);
+  await server1.close();
+
+  server2.listen((request) async {
+    server2Request.complete();
+    await request.response.close();

[kustermann, 2015/02/17 11:30:56]

ditto

[Søren Gjesse, 2015/02/17 12:53:11]

Done.

+  });
+
+  await singleRequest(host, port);
+  await server2.close();
+
+  await server1Request.future;
+  await server2Request.future;
+
+  asyncEnd();
+}
+
+void main() {
+  for (var host in ['127.0.0.1', '::1']) {
+    testBindShared(host, false);
+    testBindShared(host, true);

[kustermann, 2015/02/17 11:30:56]

This translates to

1  testBindShared('127.0.0.1', v6Only=false);
2  testBindShared('127.0.0.1', v6Only=true);
2  testBindShared('::1', v6Only=false);
3  testBindShared('::1', v6Only=true);

What is the behavior of line 2 -- i.e. 127.0.0.1+v6Only=true ?

[Søren Gjesse, 2015/02/17 12:53:11]

In that case v6Only is ignored. Not sure that is the expected behaviour. Opened
http://dartbug.com/22451.

+  }
+}