ceph/src/boost/libs/accumulators/test/moment.cpp

   1 //  (C) Copyright Eric Niebler 2005.
   2 //  Use, modification and distribution are subject to the
   3 //  Boost Software License, Version 1.0. (See accompanying file
   4 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 #include <boost/test/unit_test.hpp>
   7 #include <boost/test/floating_point_comparison.hpp>
   8 #include <boost/accumulators/accumulators.hpp>
   9 #include <boost/accumulators/statistics/stats.hpp>
  10 #include <boost/accumulators/statistics/moment.hpp>
  11
  12 using namespace boost;
  13 using namespace unit_test;
  14 using namespace accumulators;
  15
  16 ///////////////////////////////////////////////////////////////////////////////
  17 // test_stat
  18 //
  19 void test_stat()
  20 {
  21     accumulator_set<int, stats<tag::moment<2> > > acc1;
  22
  23     acc1(2); //    4
  24     acc1(4); //   16
  25     acc1(5); // + 25
  26              // = 45 / 3 = 15
  27
  28     BOOST_CHECK_CLOSE(15., accumulators::moment<2>(acc1), 1e-5);
  29
  30     accumulator_set<int, stats<tag::moment<5> > > acc2;
  31
  32     acc2(2); //     32
  33     acc2(3); //    243
  34     acc2(4); //   1024
  35     acc2(5); // + 3125
  36              // = 4424 / 4 = 1106
  37
  38     BOOST_CHECK_CLOSE(1106., accumulators::moment<5>(acc2), 1e-5);
  39 }
  40
  41 ///////////////////////////////////////////////////////////////////////////////
  42 // init_unit_test_suite
  43 //
  44 test_suite* init_unit_test_suite( int argc, char* argv[] )
  45 {
  46     test_suite *test = BOOST_TEST_SUITE("moment test");
  47
  48     test->add(BOOST_TEST_CASE(&test_stat));
  49
  50     return test;
  51 }
  52