diff --git a/src/util/dummy-client-face.hpp b/src/util/dummy-client-face.hpp
new file mode 100644
index 0000000..5ea9fab
--- /dev/null
+++ b/src/util/dummy-client-face.hpp
@@ -0,0 +1,133 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2013-2014 Regents of the University of California.
+ *
+ * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
+ *
+ * ndn-cxx library is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * ndn-cxx library is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
+ *
+ * You should have received copies of the GNU General Public License and GNU Lesser
+ * General Public License along with ndn-cxx, e.g., in COPYING.md file.  If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
+ */
+
+#ifndef NDN_UTIL_DUMMY_CLIENT_FACE_HPP
+#define NDN_UTIL_DUMMY_CLIENT_FACE_HPP
+
+#include "../face.hpp"
+#include "event-emitter.hpp"
+
+namespace ndn {
+namespace util {
+
+/** \brief a client-side face for unit testing
+ */
+class DummyClientFace : public ndn::Face
+{
+public:
+  /** \brief options for DummyClientFace
+   */
+  struct Options
+  {
+    /** \brief if true, packets sent out of DummyClientFace will be appended to a container
+     */
+    bool enablePacketLogging;
+
+    /** \brief if true, prefix registration command will be automatically
+     *         replied with a successful response
+     */
+    bool enableRegistrationReply;
+  };
+
+  /** \brief cause the Face to receive a packet
+   *  \tparam Packet either Interest or Data
+   */
+  template<typename Packet>
+  void
+  receive(const Packet& packet);
+
+private: // constructors
+  class Transport;
+
+  // constructors are private; use makeDummyClientFace to create DummyClientFace
+
+  DummyClientFace(const Options& options, shared_ptr<Transport> transport);
+
+  DummyClientFace(const Options& options, shared_ptr<Transport> transport,
+                  boost::asio::io_service& ioService);
+
+  void
+  construct(const Options& options);
+
+  friend shared_ptr<DummyClientFace>
+  makeDummyClientFace(const DummyClientFace::Options& options);
+
+  friend shared_ptr<DummyClientFace>
+  makeDummyClientFace(boost::asio::io_service& ioService, const DummyClientFace::Options& options);
+
+private:
+  void
+  enablePacketLogging();
+
+  void
+  enableRegistrationReply();
+
+public:
+  /** \brief default options
+   *
+   *  enablePacketLogging=true
+   *  enableRegistrationReply=false
+   */
+  static const Options DEFAULT_OPTIONS;
+
+  /** \brief Interests sent out of this DummyClientFace
+   *
+   *  Sent Interests are appended to this container if options.enablePacketLogger is true.
+   *  User of this class is responsible for cleaning up the container, if necessary.
+   *  After .expressInterest, .processEvents must be called before the Interest would show up here.
+   */
+  std::vector<Interest> sentInterests;
+
+  /** \brief Data sent out of this DummyClientFace
+   *
+   *  Sent Data are appended to this container if options.enablePacketLogger is true.
+   *  User of this class is responsible for cleaning up the container, if necessary.
+   *  After .put, .processEvents must be called before the Data would show up here.
+   */
+  std::vector<Data> sentDatas;
+
+  /** \brief Event to be called whenever an Interest is received
+   *
+   *  After .expressInterest, .processEvents must be called before this event would be triggered.
+   */
+  util::EventEmitter<Interest> onInterest;
+
+  /** \brief Event to be called whenever a Data packet is received
+   *
+   *  After .put, .processEvents must be called before this event would be triggered.
+   */
+  util::EventEmitter<Data> onData;
+
+private:
+  shared_ptr<Transport> m_transport;
+};
+
+shared_ptr<DummyClientFace>
+makeDummyClientFace(const DummyClientFace::Options& options = DummyClientFace::DEFAULT_OPTIONS);
+
+shared_ptr<DummyClientFace>
+makeDummyClientFace(boost::asio::io_service& ioService,
+                    const DummyClientFace::Options& options = DummyClientFace::DEFAULT_OPTIONS);
+
+} // namespace util
+} // namespace ndn
+
+#endif // NDN_UTIL_DUMMY_CLIENT_FACE_HPP