diff --git a/mock_connection_manager.h b/mock_connection_manager.h
new file mode 100644
index 0000000..522e1f6
--- /dev/null
+++ b/mock_connection_manager.h
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROMEOS_PLATFORM_UPDATE_ENGINE_MOCK_CONNECTION_MANAGER_H_
+#define CHROMEOS_PLATFORM_UPDATE_ENGINE_MOCK_CONNECTION_MANAGER_H_
+
+#include <gmock/gmock.h>
+
+#include "update_engine/connection_manager.h"
+
+namespace chromeos_update_engine {
+
+// This class mocks the generic interface to the connection manager
+// (e.g FlimFlam, Shill, etc.) to consolidate all connection-related
+// logic in update_engine.
+class MockConnectionManager : public ConnectionManager {
+ public:
+  MockConnectionManager(SystemState* system_state)
+      : ConnectionManager(system_state) {}
+
+  MOCK_CONST_METHOD2(GetConnectionType, bool(DbusGlibInterface* dbus_iface,
+                                             NetworkConnectionType* out_type));
+
+  MOCK_CONST_METHOD1(IsUpdateAllowedOver, bool(NetworkConnectionType type));
+
+  MOCK_CONST_METHOD1(StringForConnectionType,
+      const char*(NetworkConnectionType type));
+};
+
+}  // namespace chromeos_update_engine
+
+#endif  // CHROMEOS_PLATFORM_UPDATE_ENGINE_MOCK_CONNECTION_MANAGER_H_