Testing environment

Change-Id: I431214b62e7cc8793db80a05fe854849b4c6df5b
diff --git a/tests/dummy-forwarder.hpp b/tests/dummy-forwarder.hpp
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+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2014-2018, Regents of the University of California
+ *
+ * NAC 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.
+ *
+ * NAC 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 NAC library authors and contributors.
+ */
+
+#include <ndn-cxx/interest.hpp>
+#include <ndn-cxx/data.hpp>
+#include <ndn-cxx/lp/nack.hpp>
+#include <ndn-cxx/util/dummy-client-face.hpp>
+#include <ndn-cxx/security/key-chain.hpp>
+
+#ifndef NAC_TESTS_TEST_DUMMY_FORWARDER_HPP
+#define NAC_TESTS_TEST_DUMMY_FORWARDER_HPP
+
+namespace ndn {
+namespace nac {
+namespace tests {
+
+/**
+ * @brief Very basic implementation of the dummy forwarder
+ *
+ * Interests expressed by any added face, will be forwarded to all other faces.
+ * Similarly, any pushed data, will be pushed to all other faces.
+ */
+class DummyForwarder
+{
+public:
+  DummyForwarder(boost::asio::io_service& io, KeyChain& keyChain);
+
+  Face&
+  addFace();
+
+  Face&
+  getFace(size_t nFace)
+  {
+    return *m_faces.at(nFace);
+  }
+
+private:
+  boost::asio::io_service& m_io;
+  KeyChain& m_keyChain;
+  std::vector<shared_ptr<util::DummyClientFace>> m_faces;
+};
+
+} // namespace tests
+} // namespace nac
+} // namespace ndn
+
+#endif // NAC_TESTS_TEST_DUMMY_FORWARDER_HPP