[net/dns] Resolve AF_UNSPEC on dual-stacked systems. Sort addresses according to RFC3484.

net/dns/address_sorter_unittest.cc

Index: net/dns/address_sorter_unittest.cc
diff --git a/net/dns/address_sorter_unittest.cc b/net/dns/address_sorter_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..673421c9fd81167fa48f9479fea33d0c6f94b753
--- /dev/null
+++ b/net/dns/address_sorter_unittest.cc
@@ -0,0 +1,48 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "net/dns/address_sorter.h"
+
+#include "base/bind.h"
+#include "base/logging.h"
+#include "base/synchronization/waitable_event.h"
+#include "net/base/address_list.h"
+#include "net/base/net_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace net {
+namespace {
+
+IPEndPoint MakeEndPoint(const std::string& str) {
+  IPAddressNumber addr;
+  CHECK(ParseIPLiteralToNumber(str, &addr));
+  return IPEndPoint(addr, 0);
+}
+
+void OnSortComplete(AddressList* result_buf,
+                    base::WaitableEvent* event,
+                    bool success,
+                    const AddressList& result) {
+  EXPECT_TRUE(success);
+  if (success)
+    *result_buf = result;
+  event->Signal();
+}
+
+TEST(AddressSorterTest, Sort) {
+  scoped_ptr<AddressSorter> sorter(AddressSorter::CreateAddressSorter());
+  AddressList list;
+  list.push_back(MakeEndPoint("10.0.0.1"));
+  list.push_back(MakeEndPoint("8.8.8.8"));
+  list.push_back(MakeEndPoint("::1"));
+  list.push_back(MakeEndPoint("2001:4860:4860::8888"));
+
+  base::WaitableEvent event(false, false);
+  AddressList result;
+  sorter->Sort(list, base::Bind(&OnSortComplete, &result, &event));
+  event.Wait();
+}
+
+}  // namespace
+}  // namespace net