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

Change-Id: I78ea29938259fac288781bed12fb2399ac7eba26
diff --git a/tests/unit/util/logger.t.cpp b/tests/unit/util/logger.t.cpp
new file mode 100644
index 0000000..cc48425
--- /dev/null
+++ b/tests/unit/util/logger.t.cpp
@@ -0,0 +1,82 @@
+/* -*- 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 "util/logger.hpp"
+#include "util/logging.hpp"
+
+#include "boost-test.hpp"
+
+namespace ndn {
+namespace util {
+namespace tests {
+
+BOOST_AUTO_TEST_SUITE(Util)
+BOOST_AUTO_TEST_SUITE(TestLogger)
+
+BOOST_AUTO_TEST_CASE(LegalAlphanumeric)
+{
+  Logger logger("ndnTest123");
+  auto mNames = Logging::getLoggerNames();
+  BOOST_CHECK_EQUAL(mNames.count("ndnTest123"), 1);
+  BOOST_CHECK(logger.isLevelEnabled(LogLevel::NONE));
+  Logging::get().removeLogger(logger);
+}
+
+BOOST_AUTO_TEST_CASE(AllLegalSymbols)
+{
+  Logger logger("ndn.~#%.test_<check>1-2-3");
+  auto mNames = Logging::getLoggerNames();
+  BOOST_CHECK_EQUAL(mNames.count("ndn.~#%.test_<check>1-2-3"), 1);
+  BOOST_CHECK(logger.isLevelEnabled(LogLevel::NONE));
+  Logging::get().removeLogger(logger);
+}
+
+BOOST_AUTO_TEST_CASE(EmptyLogger)
+{
+  BOOST_CHECK_THROW(Logger logger(""), std::invalid_argument);
+}
+
+BOOST_AUTO_TEST_CASE(InvalidSymbol)
+{
+  BOOST_CHECK_THROW(Logger logger("ndn.test.*"), std::invalid_argument);
+}
+
+BOOST_AUTO_TEST_CASE(StartsWithPeriod)
+{
+  BOOST_CHECK_THROW(Logger logger(".ndn.test"), std::invalid_argument);
+}
+
+BOOST_AUTO_TEST_CASE(EndsWithPeriod)
+{
+  BOOST_CHECK_THROW(Logger logger("ndn.test."), std::invalid_argument);
+}
+
+BOOST_AUTO_TEST_CASE(ConsecutivePeriods)
+{
+  BOOST_CHECK_THROW(Logger logger("ndn..test"), std::invalid_argument);
+}
+
+BOOST_AUTO_TEST_SUITE_END() // TestLogger
+BOOST_AUTO_TEST_SUITE_END() // Util
+
+} // namespace tests
+} // namespace util
+} // namespace ndn