table: StrategyChoice uses unique_ptr instead of shared_ptr

refs #3164

Change-Id: Id3110f72aab83982b0768e596a04bad9f7336975
diff --git a/tests/daemon/fw/install-strategy.hpp b/tests/daemon/fw/install-strategy.hpp
new file mode 100644
index 0000000..ec3c848
--- /dev/null
+++ b/tests/daemon/fw/install-strategy.hpp
@@ -0,0 +1,88 @@
+/* -*- 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_FW_INSTALL_STRATEGY_HPP
+#define NFD_TESTS_DAEMON_FW_INSTALL_STRATEGY_HPP
+
+namespace nfd {
+namespace fw {
+class Strategy;
+} // namespace fw
+
+namespace tests {
+
+/** \brief install a strategy to forwarder
+ *  \tparam S strategy type
+ *  \param forwarder the forwarder
+ *  \param args arguments to strategy constructor
+ *  \throw std::bad_cast a strategy with duplicate strategyName is already installed
+ *                       and has an incompatible type
+ *  \return a reference to the strategy
+ */
+template<typename S, typename ...Args>
+typename std::enable_if<std::is_base_of<fw::Strategy, S>::value, S&>::type
+install(Forwarder& forwarder, Args&&... args)
+{
+  auto strategy = make_unique<S>(ref(forwarder), std::forward<Args>(args)...);
+  fw::Strategy* installed = forwarder.getStrategyChoice().install(std::move(strategy)).second;
+  return dynamic_cast<S&>(*installed);
+}
+
+/** \brief install a strategy to forwarder, and choose the strategy for a namespace
+ *  \tparam S strategy type
+ *  \param forwarder the forwarder
+ *  \param prefix namespace to choose the strategy for
+ *  \param args arguments to strategy constructor
+ *  \throw std::bad_cast a strategy with duplicate strategyName is already installed
+ *                       and has an incompatible type
+ *  \return a reference to the strategy
+ */
+template<typename S, typename ...Args>
+typename std::enable_if<std::is_base_of<fw::Strategy, S>::value, S&>::type
+choose(Forwarder& forwarder, const Name& prefix, Args&&... args)
+{
+  S& strategy = install<S>(forwarder, std::forward<Args>(args)...);
+  forwarder.getStrategyChoice().insert(prefix, strategy.getName());
+  return strategy;
+}
+
+/** \brief install a strategy to forwarder, and choose the strategy as default
+ *  \tparam S strategy type
+ *  \param forwarder the forwarder
+ *  \throw std::bad_cast a strategy with duplicate strategyName is already installed
+ *                       and has an incompatible type
+ *  \return a reference to the strategy
+ */
+template<typename S>
+typename std::enable_if<std::is_base_of<fw::Strategy, S>::value, S&>::type
+choose(Forwarder& forwarder)
+{
+  return choose<S>(forwarder, "ndn:/");
+}
+
+} // namespace tests
+} // namespace nfd
+
+#endif // NFD_TESTS_DAEMON_FW_INSTALL_STRATEGY_HPP