diff --git a/patchpanel/mock_datapath.h b/patchpanel/mock_datapath.h
new file mode 100644
index 0000000..c835344
--- /dev/null
+++ b/patchpanel/mock_datapath.h
@@ -0,0 +1,71 @@
+// Copyright 2019 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 PATCHPANEL_MOCK_DATAPATH_H_
+#define PATCHPANEL_MOCK_DATAPATH_H_
+
+#include <string>
+
+#include <base/macros.h>
+
+#include "patchpanel/datapath.h"
+#include "patchpanel/minijailed_process_runner.h"
+
+namespace patchpanel {
+
+// ARC networking data path configuration utility.
+class MockDatapath : public Datapath {
+ public:
+  explicit MockDatapath(MinijailedProcessRunner* runner) : Datapath(runner) {}
+  ~MockDatapath() = default;
+
+  MOCK_METHOD3(AddBridge,
+               bool(const std::string& ifname,
+                    uint32_t ipv4_addr,
+                    uint32_t prefix_len));
+  MOCK_METHOD1(RemoveBridge, void(const std::string& ifname));
+  MOCK_METHOD2(AddToBridge,
+               bool(const std::string& br_ifname, const std::string& ifname));
+  MOCK_METHOD4(AddTAP,
+               std::string(const std::string& name,
+                           const MacAddress* mac_addr,
+                           const SubnetAddress* ipv4_addr,
+                           const std::string& user));
+  MOCK_METHOD2(AddVirtualInterfacePair,
+               bool(const std::string& veth_ifname,
+                    const std::string& peer_ifname));
+  MOCK_METHOD2(ToggleInterface, bool(const std::string& ifname, bool up));
+  MOCK_METHOD6(ConfigureInterface,
+               bool(const std::string& ifname,
+                    const MacAddress& mac_addr,
+                    uint32_t addr,
+                    uint32_t prefix_len,
+                    bool up,
+                    bool multicast));
+  MOCK_METHOD1(RemoveInterface, void(const std::string& ifname));
+  MOCK_METHOD1(AddLegacyIPv4DNAT, bool(const std::string& ipv4_addr));
+  MOCK_METHOD0(RemoveLegacyIPv4DNAT, void());
+  MOCK_METHOD1(AddLegacyIPv4InboundDNAT, bool(const std::string& ifname));
+  MOCK_METHOD0(RemoveLegacyIPv4InboundDNAT, void());
+  MOCK_METHOD2(AddInboundIPv4DNAT,
+               bool(const std::string& ifname, const std::string& ipv4_addr));
+  MOCK_METHOD2(RemoveInboundIPv4DNAT,
+               void(const std::string& ifname, const std::string& ipv4_addr));
+  MOCK_METHOD1(AddOutboundIPv4, bool(const std::string& ifname));
+  MOCK_METHOD1(RemoveOutboundIPv4, void(const std::string& ifname));
+  MOCK_METHOD3(MaskInterfaceFlags,
+               bool(const std::string& ifname, uint16_t on, uint16_t off));
+  MOCK_METHOD2(AddIPv6Forwarding,
+               bool(const std::string& ifname1, const std::string& ifname2));
+  MOCK_METHOD2(RemoveIPv6Forwarding,
+               void(const std::string& ifname1, const std::string& ifname2));
+  MOCK_METHOD3(AddIPv4Route, bool(uint32_t gw, uint32_t dst, uint32_t netmask));
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(MockDatapath);
+};
+
+}  // namespace patchpanel
+
+#endif  // PATCHPANEL_MOCK_DATAPATH_H_