util: Exposing IndentedStream class as part of public API

Change-Id: I2162a1c3e463f76e4192baf2eb618afd73082781
Refs: #2238
diff --git a/tests/unit-tests/util/indented-stream.cpp b/tests/unit-tests/util/indented-stream.cpp
new file mode 100644
index 0000000..d82e9f3
--- /dev/null
+++ b/tests/unit-tests/util/indented-stream.cpp
@@ -0,0 +1,59 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2013-2014 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/indented-stream.hpp"
+
+#include "boost-test.hpp"
+#include <boost/test/output_test_stream.hpp>
+
+using boost::test_tools::output_test_stream;
+
+namespace ndn {
+namespace util {
+namespace tests {
+
+BOOST_AUTO_TEST_SUITE(UtilIndentedStream)
+
+BOOST_AUTO_TEST_CASE(Basic)
+{
+  output_test_stream os;
+
+  os << "Hello" << std::endl;
+  {
+    IndentedStream os1(os, " [prefix] ");
+    os1 << "," << "\n";
+    {
+      IndentedStream os2(os1, " [another prefix] ");
+      os2 << "World!" << "\n";
+    }
+  }
+
+  BOOST_CHECK(os.is_equal("Hello\n"
+                          " [prefix] ,\n"
+                          " [prefix]  [another prefix] World!\n"
+                          ));
+}
+
+BOOST_AUTO_TEST_SUITE_END()
+
+} // namespace tests
+} // namespace util
+} // namespace ndn