diff --git a/tests/unit-tests/encoding/tlv.cpp b/tests/unit-tests/encoding/tlv.cpp
new file mode 100644
index 0000000..7aeec58
--- /dev/null
+++ b/tests/unit-tests/encoding/tlv.cpp
@@ -0,0 +1,416 @@
+/* -*- 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 "encoding/tlv.hpp"
+
+#include "boost-test.hpp"
+#include <boost/iostreams/stream.hpp>
+
+namespace ndn {
+namespace tlv {
+namespace tests {
+
+using std::ostringstream;
+
+BOOST_AUTO_TEST_SUITE(EncodingTlv)
+
+BOOST_AUTO_TEST_CASE(Exception)
+{
+  BOOST_CHECK_THROW(throw Error("Test"), Error);
+}
+
+BOOST_AUTO_TEST_SUITE(VarNumber)
+
+static const uint8_t BUFFER[] = {
+  0x01, // == 1
+  0xfc, // == 252
+  0xfd, 0x00, 0xfd, // == 253
+  0xfe, 0x00, 0x01, 0x00, 0x00, // == 65536
+  0xff, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00 // == 4294967296LL
+};
+
+BOOST_AUTO_TEST_CASE(SizeOf)
+{
+  BOOST_CHECK_EQUAL(sizeOfVarNumber(1), 1);
+  BOOST_CHECK_EQUAL(sizeOfVarNumber(252), 1);
+  BOOST_CHECK_EQUAL(sizeOfVarNumber(253), 3);
+  BOOST_CHECK_EQUAL(sizeOfVarNumber(65536), 5);
+  BOOST_CHECK_EQUAL(sizeOfVarNumber(4294967296LL), 9);
+}
+
+BOOST_AUTO_TEST_CASE(Write)
+{
+  ostringstream os;
+
+  writeVarNumber(os, 1);
+  writeVarNumber(os, 252);
+  writeVarNumber(os, 253);
+  writeVarNumber(os, 65536);
+  writeVarNumber(os, 4294967296LL);
+
+  std::string buffer = os.str();
+  const uint8_t* actual = reinterpret_cast<const uint8_t*>(buffer.c_str());
+
+  BOOST_CHECK_EQUAL(buffer.size(), sizeof(BUFFER));
+  BOOST_CHECK_EQUAL_COLLECTIONS(BUFFER, BUFFER + sizeof(BUFFER),
+                                actual, actual + sizeof(BUFFER));
+}
+
+BOOST_AUTO_TEST_CASE(ReadFromBuffer)
+{
+  const uint8_t* begin;
+  uint64_t value;
+
+  begin = BUFFER;
+  BOOST_CHECK_EQUAL(readVarNumber(begin, begin + 1, value), true);
+  begin = BUFFER;
+  BOOST_CHECK_NO_THROW(readVarNumber(begin, begin + 1));
+  BOOST_CHECK_EQUAL(value, 1);
+
+  begin = BUFFER + 1;
+  BOOST_CHECK_EQUAL(readVarNumber(begin, begin + 1, value), true);
+  begin = BUFFER + 1;
+  BOOST_CHECK_NO_THROW(readVarNumber(begin, begin + 1));
+  BOOST_CHECK_EQUAL(value, 252);
+
+  begin = BUFFER + 2;
+  BOOST_CHECK_EQUAL(readVarNumber(begin, begin + 1, value), false);
+  begin = BUFFER + 2;
+  BOOST_CHECK_THROW(readVarNumber(begin, begin + 1), Error);
+
+  begin = BUFFER + 2;
+  BOOST_CHECK_EQUAL(readVarNumber(begin, begin + 2, value), false);
+  begin = BUFFER + 2;
+  BOOST_CHECK_THROW(readVarNumber(begin, begin + 2), Error);
+
+  begin = BUFFER + 2;
+  BOOST_CHECK_EQUAL(readVarNumber(begin, begin + 3, value), true);
+  begin = BUFFER + 2;
+  BOOST_CHECK_NO_THROW(readVarNumber(begin, begin + 3));
+  BOOST_CHECK_EQUAL(value, 253);
+
+
+  begin = BUFFER + 5;
+  BOOST_CHECK_EQUAL(readVarNumber(begin, begin + 1, value), false);
+  begin = BUFFER + 5;
+  BOOST_CHECK_THROW(readVarNumber(begin, begin + 1), Error);
+
+  begin = BUFFER + 5;
+  BOOST_CHECK_EQUAL(readVarNumber(begin, begin + 4, value), false);
+  begin = BUFFER + 5;
+  BOOST_CHECK_THROW(readVarNumber(begin, begin + 4), Error);
+
+  begin = BUFFER + 5;
+  BOOST_CHECK_EQUAL(readVarNumber(begin, begin + 5, value), true);
+  begin = BUFFER + 5;
+  BOOST_CHECK_NO_THROW(readVarNumber(begin, begin + 5));
+  BOOST_CHECK_EQUAL(value, 65536);
+
+  begin = BUFFER + 10;
+  BOOST_CHECK_EQUAL(readVarNumber(begin, begin + 1, value), false);
+  begin = BUFFER + 10;
+  BOOST_CHECK_THROW(readVarNumber(begin, begin + 1), Error);
+
+  begin = BUFFER + 10;
+  BOOST_CHECK_EQUAL(readVarNumber(begin, begin + 8, value), false);
+  begin = BUFFER + 10;
+  BOOST_CHECK_THROW(readVarNumber(begin, begin + 8), Error);
+
+  begin = BUFFER + 10;
+  BOOST_CHECK_EQUAL(readVarNumber(begin, begin + 9, value), true);
+  begin = BUFFER + 10;
+  BOOST_CHECK_NO_THROW(readVarNumber(begin, begin + 9));
+  BOOST_CHECK_EQUAL(value, 4294967296LL);
+}
+
+BOOST_AUTO_TEST_CASE(ReadFromStream)
+{
+  typedef boost::iostreams::stream<boost::iostreams::array_source> ArrayStream;
+  typedef std::istream_iterator<uint8_t> Iterator;
+
+  Iterator end; // end of stream
+  uint64_t value;
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER), 1);
+    Iterator begin(stream);
+    BOOST_CHECK_EQUAL(readVarNumber(begin, end, value), true);
+  }
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER), 1);
+    Iterator begin(stream);
+    BOOST_CHECK_NO_THROW(readVarNumber(begin, end));
+    BOOST_CHECK_EQUAL(value, 1);
+  }
+
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER) + 1, 1);
+    Iterator begin(stream);
+    BOOST_CHECK_EQUAL(readVarNumber(begin, end, value), true);
+  }
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER) + 1, 1);
+    Iterator begin(stream);
+    BOOST_CHECK_NO_THROW(readVarNumber(begin, end));
+    BOOST_CHECK_EQUAL(value, 252);
+  }
+
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER) + 2, 1);
+    Iterator begin(stream);
+    BOOST_CHECK_EQUAL(readVarNumber(begin, end, value), false);
+  }
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER) + 2, 1);
+    Iterator begin(stream);
+    BOOST_CHECK_THROW(readVarNumber(begin, end), Error);
+  }
+
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER) + 2, 2);
+    Iterator begin(stream);
+    BOOST_CHECK_EQUAL(readVarNumber(begin, end, value), false);
+  }
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER) + 2, 2);
+    Iterator begin(stream);
+    BOOST_CHECK_THROW(readVarNumber(begin, end), Error);
+  }
+
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER) + 2, 3);
+    Iterator begin(stream);
+    BOOST_CHECK_EQUAL(readVarNumber(begin, end, value), true);
+  }
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER) + 2, 3);
+    Iterator begin(stream);
+    BOOST_CHECK_NO_THROW(readVarNumber(begin, end));
+    BOOST_CHECK_EQUAL(value, 253);
+  }
+
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER) + 5, 1);
+    Iterator begin(stream);
+    BOOST_CHECK_EQUAL(readVarNumber(begin, end, value), false);
+  }
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER) + 5, 1);
+    Iterator begin(stream);
+    BOOST_CHECK_THROW(readVarNumber(begin, end), Error);
+  }
+
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER) + 5, 4);
+    Iterator begin(stream);
+    BOOST_CHECK_EQUAL(readVarNumber(begin, end, value), false);
+  }
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER) + 5, 4);
+    Iterator begin(stream);
+    BOOST_CHECK_THROW(readVarNumber(begin, end), Error);
+  }
+
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER) + 5, 5);
+    Iterator begin(stream);
+    BOOST_CHECK_EQUAL(readVarNumber(begin, end, value), true);
+  }
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER) + 5, 5);
+    Iterator begin(stream);
+    BOOST_CHECK_NO_THROW(readVarNumber(begin, end));
+    BOOST_CHECK_EQUAL(value, 65536);
+  }
+
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER) + 10, 1);
+    Iterator begin(stream);
+    BOOST_CHECK_EQUAL(readVarNumber(begin, end, value), false);
+  }
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER) + 10, 1);
+    Iterator begin(stream);
+    BOOST_CHECK_THROW(readVarNumber(begin, end), Error);
+  }
+
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER) + 10, 8);
+    Iterator begin(stream);
+    BOOST_CHECK_EQUAL(readVarNumber(begin, end, value), false);
+  }
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER) + 10, 8);
+    Iterator begin(stream);
+    BOOST_CHECK_THROW(readVarNumber(begin, end), Error);
+  }
+
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER) + 10, 9);
+    Iterator begin(stream);
+    BOOST_CHECK_EQUAL(readVarNumber(begin, end, value), true);
+  }
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER) + 10, 9);
+    Iterator begin(stream);
+    BOOST_CHECK_NO_THROW(readVarNumber(begin, end));
+    BOOST_CHECK_EQUAL(value, 4294967296LL);
+  }
+}
+
+BOOST_AUTO_TEST_SUITE_END() // VarNumber
+
+BOOST_AUTO_TEST_SUITE(NonNegativeInteger)
+
+static const uint8_t BUFFER[] = {
+  0x01, // 1
+  0x01, 0x01, // 257
+  0x01, 0x01, 0x01, 0x01, // 16843009LL
+  0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01 // 72340172838076673LL
+};
+
+BOOST_AUTO_TEST_CASE(SizeOf)
+{
+  BOOST_CHECK_EQUAL(sizeOfNonNegativeInteger(1), 1);
+  BOOST_CHECK_EQUAL(sizeOfNonNegativeInteger(252), 1);
+  BOOST_CHECK_EQUAL(sizeOfNonNegativeInteger(253), 2);
+  BOOST_CHECK_EQUAL(sizeOfNonNegativeInteger(257), 2);
+  BOOST_CHECK_EQUAL(sizeOfNonNegativeInteger(65536), 4);
+  BOOST_CHECK_EQUAL(sizeOfNonNegativeInteger(16843009LL), 4);
+  BOOST_CHECK_EQUAL(sizeOfNonNegativeInteger(4294967296LL), 8);
+  BOOST_CHECK_EQUAL(sizeOfNonNegativeInteger(72340172838076673LL), 8);
+}
+
+BOOST_AUTO_TEST_CASE(Write)
+{
+  ostringstream os;
+
+  writeNonNegativeInteger(os, 1);
+  writeNonNegativeInteger(os, 257);
+  writeNonNegativeInteger(os, 16843009LL);
+  writeNonNegativeInteger(os, 72340172838076673LL);
+
+  std::string buffer = os.str();
+  const uint8_t* actual = reinterpret_cast<const uint8_t*>(buffer.c_str());
+
+  BOOST_CHECK_EQUAL(buffer.size(), sizeof(BUFFER));
+  BOOST_CHECK_EQUAL_COLLECTIONS(BUFFER, BUFFER + sizeof(BUFFER),
+                                actual, actual + sizeof(BUFFER));
+}
+
+
+BOOST_AUTO_TEST_CASE(ReadFromBuffer)
+{
+  const uint8_t* begin;
+  uint64_t value;
+
+  begin = BUFFER;
+  BOOST_CHECK_THROW(value = readNonNegativeInteger(1, begin, begin + 0), Error);
+  BOOST_CHECK_NO_THROW(value = readNonNegativeInteger(1, begin, begin + 1));
+  BOOST_CHECK_EQUAL(value, 1);
+
+  begin = BUFFER + 1;
+  BOOST_CHECK_THROW(value = readNonNegativeInteger(2, begin, begin + 1), Error);
+  BOOST_CHECK_NO_THROW(value = readNonNegativeInteger(2, begin, begin + 2));
+  BOOST_CHECK_EQUAL(value, 257);
+
+  begin = BUFFER + 3;
+  BOOST_CHECK_THROW(value = readNonNegativeInteger(4, begin, begin + 3), Error);
+  BOOST_CHECK_NO_THROW(value = readNonNegativeInteger(4, begin, begin + 4));
+  BOOST_CHECK_EQUAL(value, 16843009LL);
+
+  begin = BUFFER + 7;
+  BOOST_CHECK_THROW(value = readNonNegativeInteger(8, begin, begin + 7), Error);
+  BOOST_CHECK_NO_THROW(value = readNonNegativeInteger(8, begin, begin + 8));
+  BOOST_CHECK_EQUAL(value, 72340172838076673LL);
+
+  begin = BUFFER;
+  BOOST_CHECK_THROW(value = readNonNegativeInteger(3, begin, begin + 3), Error);
+}
+
+BOOST_AUTO_TEST_CASE(ReadFromStream)
+{
+  typedef boost::iostreams::stream<boost::iostreams::array_source> ArrayStream;
+  typedef std::istream_iterator<uint8_t> Iterator;
+
+  Iterator end; // end of stream
+  uint64_t value;
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER), 0);
+    Iterator begin(stream);
+    BOOST_CHECK_THROW(value = readNonNegativeInteger(1, begin, end), Error);
+  }
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER), 1);
+    Iterator begin(stream);
+    BOOST_CHECK_NO_THROW(value = readNonNegativeInteger(1, begin, end));
+    BOOST_CHECK_EQUAL(value, 1);
+  }
+
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER + 1), 1);
+    Iterator begin(stream);
+    BOOST_CHECK_THROW(value = readNonNegativeInteger(2, begin, end), Error);
+  }
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER + 1), 2);
+    Iterator begin(stream);
+    BOOST_CHECK_NO_THROW(value = readNonNegativeInteger(2, begin, end));
+    BOOST_CHECK_EQUAL(value, 257);
+  }
+
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER + 3), 3);
+    Iterator begin(stream);
+    BOOST_CHECK_THROW(value = readNonNegativeInteger(4, begin, end), Error);
+  }
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER + 3), 4);
+    Iterator begin(stream);
+    BOOST_CHECK_NO_THROW(value = readNonNegativeInteger(4, begin, end));
+    BOOST_CHECK_EQUAL(value, 16843009LL);
+  }
+
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER + 7), 7);
+    Iterator begin(stream);
+    BOOST_CHECK_THROW(value = readNonNegativeInteger(8, begin, end), Error);
+  }
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER + 7), 8);
+    Iterator begin(stream);
+    BOOST_CHECK_NO_THROW(value = readNonNegativeInteger(8, begin, end));
+    BOOST_CHECK_EQUAL(value, 72340172838076673LL);
+  }
+
+  {
+    ArrayStream stream(reinterpret_cast<const char*>(BUFFER), 3);
+    Iterator begin(stream);
+    BOOST_CHECK_THROW(value = readNonNegativeInteger(3, begin, end), Error);
+  }
+}
+
+BOOST_AUTO_TEST_SUITE_END() // NonNegativeInteger
+
+BOOST_AUTO_TEST_SUITE_END() // EncodingTlv
+
+} // namespace tests
+} // namespace tlv
+} // namespace ndn