Rename 'tests/unit-tests' directory to 'tests/unit'

Change-Id: I78ea29938259fac288781bed12fb2399ac7eba26
diff --git a/tests/unit/ims/in-memory-storage-lfu.t.cpp b/tests/unit/ims/in-memory-storage-lfu.t.cpp
new file mode 100644
index 0000000..ef58ce7
--- /dev/null
+++ b/tests/unit/ims/in-memory-storage-lfu.t.cpp
@@ -0,0 +1,135 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2013-2018 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.
+ */
+
+#include "ims/in-memory-storage-lfu.hpp"
+
+#include "boost-test.hpp"
+#include "make-interest-data.hpp"
+
+namespace ndn {
+namespace tests {
+
+using namespace ndn::tests;
+
+BOOST_AUTO_TEST_SUITE(Ims)
+BOOST_AUTO_TEST_SUITE(TestInMemoryStorageLfu)
+
+BOOST_AUTO_TEST_CASE(FrequencyQueue)
+{
+  InMemoryStorageLfu ims;
+
+  Name name1("/insert/1");
+  shared_ptr<Data> data1 = makeData(name1);
+  ims.insert(*data1);
+
+  Name name2("/insert/2");
+  shared_ptr<Data> data2 = makeData(name2);
+  ims.insert(*data2);
+
+  Name name3("/insert/3");
+  shared_ptr<Data> data3 = makeData(name3);
+  ims.insert(*data3);
+
+  shared_ptr<Interest> interest1 = makeInterest(name1);
+  shared_ptr<Interest> interest2 = makeInterest(name2);
+  shared_ptr<Interest> interest3 = makeInterest(name3);
+
+  ims.find(*interest1);
+  ims.find(*interest2);
+  ims.find(*interest3);
+  ims.find(*interest1);
+  ims.find(*interest3);
+  ims.find(*interest3);
+
+  ims.evictItem();
+  BOOST_CHECK_EQUAL(ims.size(), 2);
+
+  shared_ptr<const Data> found2 = ims.find(*interest2);
+  BOOST_CHECK(found2 == nullptr);
+
+  shared_ptr<const Data> found1 = ims.find(*interest1);
+  BOOST_CHECK_EQUAL(found1->getName(), name1);
+  shared_ptr<const Data> found3 = ims.find(*interest3);
+  BOOST_CHECK_EQUAL(found3->getName(), name3);
+}
+
+BOOST_AUTO_TEST_CASE(FrequencyQueue2)
+{
+  InMemoryStorageLfu ims;
+
+  Name name1("/insert/1");
+  shared_ptr<Data> data1 = makeData(name1);
+  ims.insert(*data1);
+
+  Name name2("/insert/2");
+  shared_ptr<Data> data2 = makeData(name2);
+  ims.insert(*data2);
+
+  Name name3("/insert/3");
+  shared_ptr<Data> data3 = makeData(name3);
+  ims.insert(*data3);
+
+  shared_ptr<Interest> interest1 = makeInterest(name1);
+  shared_ptr<Interest> interest2 = makeInterest(name2);
+  shared_ptr<Interest> interest3 = makeInterest(name3);
+
+  ims.find(*interest1);
+  ims.find(*interest2);
+  ims.find(*interest3);
+  ims.find(*interest1);
+  ims.find(*interest3);
+  ims.find(*interest3);
+
+  ims.evictItem();
+  BOOST_CHECK_EQUAL(ims.size(), 2);
+
+  shared_ptr<const Data> found2 = ims.find(*interest2);
+  BOOST_CHECK(found2 == nullptr);
+
+  shared_ptr<const Data> found1 = ims.find(*interest1);
+  BOOST_CHECK_EQUAL(found1->getName(), name1);
+  shared_ptr<const Data> found3 = ims.find(*interest3);
+  BOOST_CHECK_EQUAL(found3->getName(), name3);
+
+  Name name4("/insert/4");
+  shared_ptr<Data> data4 = makeData(name4);
+  ims.insert(*data4);
+
+  shared_ptr<Interest> interest4 = makeInterest(name4);
+  ims.find(*interest4);
+
+  ims.evictItem();
+  BOOST_CHECK_EQUAL(ims.size(), 2);
+
+  shared_ptr<const Data> found4 = ims.find(*interest4);
+  BOOST_CHECK(found4 == nullptr);
+
+  found1 = ims.find(*interest1);
+  BOOST_CHECK_EQUAL(found1->getName(), name1);
+  found3 = ims.find(*interest3);
+  BOOST_CHECK_EQUAL(found3->getName(), name3);
+}
+
+BOOST_AUTO_TEST_SUITE_END() // TestInMemoryStorageLfu
+BOOST_AUTO_TEST_SUITE_END() // Ims
+
+} // namespace tests
+} // namespace ndn