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diff --git a/libs/container/test/container_common_tests.hpp b/libs/container/test/container_common_tests.hpp
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+++ b/libs/container/test/container_common_tests.hpp
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+//////////////////////////////////////////////////////////////////////////////
+//
+// (C) Copyright Ion Gaztanaga 2014-2014. 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/container for documentation.
+//
+//////////////////////////////////////////////////////////////////////////////
+
+#ifndef BOOST_CONTAINER_TEST_CONTAINER_COMMON_TESTS_HPP
+#define BOOST_CONTAINER_TEST_CONTAINER_COMMON_TESTS_HPP
+
+#include <boost/container/detail/config_begin.hpp>
+
+namespace boost{
+namespace container {
+namespace test{
+
+
+template<class Container>
+const Container &as_const(Container &c)
+{  return c;   }
+
+//nth, index_of
+template<class Container>
+bool test_nth_index_of(Container &c)
+{
+   typename Container::iterator it;
+   typename Container::const_iterator cit;
+   typename Container::size_type sz, csz;
+   //index 0
+   it = c.nth(0);
+   sz = c.index_of(it);
+   cit = as_const(c).nth(0);
+   csz = as_const(c).index_of(cit);
+
+   if(it != c.begin())
+      return false;
+   if(cit != c.cbegin())
+      return false;
+   if(sz != 0)
+      return false;
+   if(csz != 0)
+      return false;
+
+   //index size()/2
+   const typename Container::size_type sz_div_2 = c.size()/2;
+   it = c.nth(sz_div_2);
+   sz = c.index_of(it);
+   cit = as_const(c).nth(sz_div_2);
+   csz = as_const(c).index_of(cit);
+
+   if(it != (c.begin()+sz_div_2))
+      return false;
+   if(cit != (c.cbegin()+sz_div_2))
+      return false;
+   if(sz != sz_div_2)
+      return false;
+   if(csz != sz_div_2)
+      return false;
+
+   //index size()
+   it = c.nth(c.size());
+   sz = c.index_of(it);
+   cit = as_const(c).nth(c.size());
+   csz = as_const(c).index_of(cit);
+
+   if(it != c.end())
+      return false;
+   if(cit != c.cend())
+      return false;
+   if(sz != c.size())
+      return false;
+   if(csz != c.size())
+      return false;
+   return true;
+}
+
+}  //namespace test{
+}  //namespace container {
+}  //namespace boost{
+
+#include <boost/container/detail/config_end.hpp>
+
+#endif //#ifndef BOOST_CONTAINER_TEST_CONTAINER_COMMON_TESTS_HPP