diff --git a/ndnboost/test/unit_test_monitor.hpp b/ndnboost/test/unit_test_monitor.hpp
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+++ b/ndnboost/test/unit_test_monitor.hpp
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+//  (C) Copyright Gennadiy Rozental 2001-2008.
+//  Distributed under the Boost Software License, Version 1.0.
+//  (See accompanying file LICENSE_1_0.txt or copy at 
+//  http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/test for the library home page.
+//
+//  File        : $RCSfile$
+//
+//  Version     : $Revision: 49312 $
+//
+//  Description : defines specific version of execution monitor used to managed 
+//  run unit of test cases. Translates execution exception into error level
+// ***************************************************************************
+
+#ifndef BOOST_TEST_UNIT_TEST_MONITOR_HPP_020905GER
+#define BOOST_TEST_UNIT_TEST_MONITOR_HPP_020905GER
+
+// Boost.Test
+#include <ndnboost/test/execution_monitor.hpp>
+#include <ndnboost/test/detail/fwd_decl.hpp>
+#include <ndnboost/test/utils/trivial_singleton.hpp>
+#include <ndnboost/test/utils/callback.hpp>
+
+#include <ndnboost/test/detail/suppress_warnings.hpp>
+
+//____________________________________________________________________________//
+
+namespace ndnboost {
+
+namespace unit_test {
+
+// ************************************************************************** //
+// **************               unit_test_monitor              ************** //
+// ************************************************************************** //
+
+class BOOST_TEST_DECL unit_test_monitor_t : public singleton<unit_test_monitor_t>, public execution_monitor {
+public:
+    enum error_level { 
+        test_fail               =  1,
+        test_ok                 =  0,
+        constructor_error       = -1, 
+        unexpected_exception    = -2, 
+        os_exception            = -3, 
+        os_timeout              = -4, 
+        fatal_error             = -5,  // includes both system and user
+        destructor_error        = -6
+    };
+
+    static bool is_critical_error( error_level e ) { return e <= fatal_error; }
+
+    // monitor method
+    error_level execute_and_translate( test_case const& );
+
+private:
+    BOOST_TEST_SINGLETON_CONS( unit_test_monitor_t );
+};
+
+BOOST_TEST_SINGLETON_INST( unit_test_monitor )
+
+} // namespace unit_test
+
+} // namespace ndnboost
+
+//____________________________________________________________________________//
+
+#include <ndnboost/test/detail/enable_warnings.hpp>
+
+#endif // BOOST_TEST_UNIT_TEST_MONITOR_HPP_020905GER