Infer network connection type from network interface type.

net/base/network_change_notifier_unittest.cc

Index: net/base/network_change_notifier_unittest.cc
diff --git a/net/base/network_change_notifier_unittest.cc b/net/base/network_change_notifier_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..8aaf7e61744bf660631685389a4b46d05281b7d1
--- /dev/null
+++ b/net/base/network_change_notifier_unittest.cc
@@ -0,0 +1,65 @@
+// Copyright (c) 2014 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 "network_change_notifier.h"
+
+#include "net/base/net_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace net {
+
+TEST(NetworkChangeNotifierTest, InterfacesToConnectionType) {
+  NetworkInterfaceList list;
+
+  // Test empty list.
+  EXPECT_EQ(NetworkChangeNotifier::ConnectionTypeFromInterfaceList(list),
+            NetworkChangeNotifier::CONNECTION_UNKNOWN);
+
+  NetworkInterface interface;
+  for (int i = NetworkChangeNotifier::CONNECTION_UNKNOWN;
+       i < NetworkChangeNotifier::CONNECTION_LAST;
+       i++) {
+    // Check individual types.
+    list.clear();
+    interface.type = static_cast<NetworkChangeNotifier::ConnectionType>(i);
+    list.push_back(interface);
+    EXPECT_EQ(NetworkChangeNotifier::ConnectionTypeFromInterfaceList(list), i);
+    // Check two types.
+    for (int j = NetworkChangeNotifier::CONNECTION_UNKNOWN;
+         j < NetworkChangeNotifier::CONNECTION_LAST;
+         j++) {
+      list.clear();
+      interface.type = static_cast<NetworkChangeNotifier::ConnectionType>(i);
+      list.push_back(interface);
+      interface.type = static_cast<NetworkChangeNotifier::ConnectionType>(j);
+      list.push_back(interface);
+      EXPECT_EQ(NetworkChangeNotifier::ConnectionTypeFromInterfaceList(list),
+                i == j ? i : NetworkChangeNotifier::CONNECTION_UNKNOWN);
+    }
+  }
+
+#if defined(OS_WIN)
+  // Ignore fake Teredo interface.
+  list.clear();
+  interface.type = NetworkChangeNotifier::CONNECTION_4G;
+  interface.friendly_name = "Teredo Tunneling Pseudo-Interface";
+  list.push_back(interface);
+  // Verify Teredo interface type ignored.
+  EXPECT_EQ(NetworkChangeNotifier::ConnectionTypeFromInterfaceList(list),
+            NetworkChangeNotifier::CONNECTION_UNKNOWN);
+  // Verify type of non-Teredo interface used.
+  interface.type = NetworkChangeNotifier::CONNECTION_3G;
+  interface.friendly_name = "";
+  list.push_back(interface);
+  EXPECT_EQ(NetworkChangeNotifier::ConnectionTypeFromInterfaceList(list),
+            NetworkChangeNotifier::CONNECTION_3G);
+  // Reverse elements.
+  list.push_back(list[0]);
+  list.erase(list.begin());
+  EXPECT_EQ(NetworkChangeNotifier::ConnectionTypeFromInterfaceList(list),
+            NetworkChangeNotifier::CONNECTION_3G);
+#endif
+}
+
+}  // namespace net