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

net/dns/address_sorter_unittest.cc

+// 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"
+
+#if defined(OS_WIN)
+#include <winsock2.h>
+#endif
+
+#include "base/bind.h"
+#include "base/logging.h"
+#include "net/base/address_list.h"
+#include "net/base/net_util.h"
+#include "net/base/test_completion_callback.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+#if defined(OS_WIN)
+#include "net/base/winsock_init.h"
+#endif
+
+namespace net {
+namespace {
+
+IPEndPoint MakeEndPoint(const std::string& str) {
+  IPAddressNumber addr;
+  CHECK(ParseIPLiteralToNumber(str, &addr));
+  return IPEndPoint(addr, 0);
+}
+
+void OnSortComplete(AddressList* result_buf,
+                    const CompletionCallback& callback,
+                    bool success,
+                    const AddressList& result) {
+  if (success)
+    *result_buf = result;
+  callback.Run(success ? OK : ERR_FAILED);
+}
+
+TEST(AddressSorterTest, Sort) {
+  int expected_result = OK;
+#if defined(OS_WIN)
+  EnsureWinsockInit();
+  SOCKET sock = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
+  if (sock == INVALID_SOCKET) {
+    expected_result = ERR_FAILED;
+  } else {
+    closesocket(sock);
+  }
+#endif
+  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"));
+
+  AddressList result;
+  TestCompletionCallback callback;
+  sorter->Sort(list, base::Bind(&OnSortComplete, &result,
+                                callback.callback()));
+  EXPECT_EQ(expected_result, callback.WaitForResult());
+}
+
+}  // namespace
+}  // namespace net