text: 
  // Copyright 2017, 2018 Peter Dimov.
  // Distributed under the Boost Software License, Version 1.0.
  //
  // Endian-dependent test
  
  #include <boost/hash2/hash_append.hpp>
  #include <boost/hash2/fnv1a.hpp>
  #include <boost/core/lightweight_test.hpp>
  #include <map>
  #if !defined(BOOST_NO_CXX11_HDR_UNORDERED_MAP)
  # include <unordered_map>
  #endif
  
  template<class H, class M, class R> void test( R r )
  {
      {
          M m;
  
          for( int i = 0; i < 64; ++i )
          {
              m.insert( typename M::value_type( i, 3 * i + 1 ) );
          }
  
          H h;
  
          hash_append( h, m );
  
          BOOST_TEST_EQ( h.result(), r );
      }
  
      {
          M m;
  
          for( int i = 0; i < 64; ++i )
          {
              int j = 63 - i;
              m.insert( typename M::value_type( j, 3 * j + 1 ) );
          }
  
          H h;
  
          hash_append( h, m );
  
          BOOST_TEST_EQ( h.result(), r );
      }
  
      {
          M m;
  
          for( int i = 0; i < 64; ++i )
          {
              int j = ( i * 17 ) % 64;
              m.insert( typename M::value_type( j, 3 * j + 1 ) );
          }
  
          H h;
  
          hash_append( h, m );
  
          BOOST_TEST_EQ( h.result(), r );
      }
  }
  
  int main()
  {
      test< boost::hash2::fnv1a_32, std::map<int, int> >( 3152726101ul );
      test< boost::hash2::fnv1a_64, std::map<int, int> >( 12051529320333828229ull );
  
      test< boost::hash2::fnv1a_32, std::multimap<int, int> >( 3152726101ul );
      test< boost::hash2::fnv1a_64, std::multimap<int, int> >( 12051529320333828229ull );
  
  #if !defined(BOOST_NO_CXX11_HDR_UNORDERED_MAP)
  
      test< boost::hash2::fnv1a_32, std::unordered_map<int, int> >( 2742410178ul );
      test< boost::hash2::fnv1a_64, std::unordered_map<int, int> >( 2617313294186790738ull );
  
      test< boost::hash2::fnv1a_32, std::unordered_multimap<int, int> >( 2742410178ul );
      test< boost::hash2::fnv1a_64, std::unordered_multimap<int, int> >( 2617313294186790738ull );
  
  #endif
  
      return boost::report_errors();
  }
  