tests: merge TcpChannel and UdpChannel test suites using test case templates

Change-Id: Id56bb036db53494d4d250f9ea68a3ded78b33ddb
Refs: #3514
diff --git a/tests/daemon/face/channel-fixture.hpp b/tests/daemon/face/channel-fixture.hpp
new file mode 100644
index 0000000..a8e619d
--- /dev/null
+++ b/tests/daemon/face/channel-fixture.hpp
@@ -0,0 +1,109 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2014-2016,  Regents of the University of California,
+ *                           Arizona Board of Regents,
+ *                           Colorado State University,
+ *                           University Pierre & Marie Curie, Sorbonne University,
+ *                           Washington University in St. Louis,
+ *                           Beijing Institute of Technology,
+ *                           The University of Memphis.
+ *
+ * This file is part of NFD (Named Data Networking Forwarding Daemon).
+ * See AUTHORS.md for complete list of NFD authors and contributors.
+ *
+ * NFD is free software: you can redistribute it and/or modify it under the terms
+ * of the GNU General Public License as published by the Free Software Foundation,
+ * either version 3 of the License, or (at your option) any later version.
+ *
+ * NFD 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * NFD, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef NFD_TESTS_DAEMON_FACE_CHANNEL_FIXTURE_HPP
+#define NFD_TESTS_DAEMON_FACE_CHANNEL_FIXTURE_HPP
+
+#include "face/channel.hpp"
+#include "tests/limited-io.hpp"
+
+#include <type_traits>
+
+namespace nfd {
+namespace tests {
+
+template<class ChannelT, class EndpointT>
+class ChannelFixture : public BaseFixture
+{
+  static_assert(std::is_base_of<Channel, ChannelT>::value,
+                "ChannelFixture must be instantiated with a type derived from Channel");
+
+public:
+  virtual
+  ~ChannelFixture() = default;
+
+  static void
+  unexpectedFailure(uint32_t status, const std::string& reason)
+  {
+    BOOST_FAIL("No error expected, but got: [" << status << ": " << reason << "]");
+  }
+
+protected:
+  uint16_t
+  getNextPort()
+  {
+    return m_nextPort++;
+  }
+
+  virtual unique_ptr<ChannelT>
+  makeChannel()
+  {
+    BOOST_THROW_EXCEPTION(std::logic_error("unimplemented"));
+  }
+
+  /**
+   * if port == 0, use the port number returned by getNextPort()
+   */
+  virtual unique_ptr<ChannelT>
+  makeChannel(const boost::asio::ip::address& addr, uint16_t port = 0)
+  {
+    BOOST_THROW_EXCEPTION(std::logic_error("unimplemented"));
+  }
+
+  void
+  listen(const boost::asio::ip::address& addr)
+  {
+    listenerEp = EndpointT{addr, 7030};
+    listenerChannel = makeChannel(addr, 7030);
+    listenerChannel->listen(
+      [this] (const shared_ptr<Face>& newFace) {
+        BOOST_REQUIRE(newFace != nullptr);
+        connectFaceClosedSignal(*newFace, [this] { limitedIo.afterOp(); });
+        listenerFaces.push_back(newFace);
+        limitedIo.afterOp();
+      },
+      ChannelFixture::unexpectedFailure);
+  }
+
+  virtual void
+  connect(ChannelT&)
+  {
+    BOOST_THROW_EXCEPTION(std::logic_error("unimplemented"));
+  }
+
+protected:
+  LimitedIo limitedIo;
+  EndpointT listenerEp;
+  unique_ptr<ChannelT> listenerChannel;
+  std::vector<shared_ptr<Face>> listenerFaces;
+
+private:
+  uint16_t m_nextPort = 7050;
+};
+
+} // namespace tests
+} // namespace nfd
+
+#endif // NFD_TESTS_DAEMON_FACE_CHANNEL_FIXTURE_HPP