ceph/src/boost/libs/accumulators/test/mean.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/weighted_mean.hpp>
  11 #include <boost/accumulators/statistics/variates/covariate.hpp>
  12
  13 using namespace boost;
  14 using namespace unit_test;
  15 using namespace accumulators;
  16
  17 template<typename T>
  18 void assert_is_double(T const &)
  19 {
  20     BOOST_MPL_ASSERT((is_same<T, double>));
  21 }
  22
  23 ///////////////////////////////////////////////////////////////////////////////
  24 // test_stat
  25 //
  26 void test_stat()
  27 {
  28     accumulator_set<
  29         int
  30       , stats<
  31             tag::mean
  32           , tag::mean_of_variates<int, tag::covariate1>
  33         >
  34     > acc, test_acc(sample = 0);
  35
  36     acc(1, covariate1 = 3);
  37     BOOST_CHECK_CLOSE(1., mean(acc), 1e-5);
  38     BOOST_CHECK_EQUAL(1u, count(acc));
  39     BOOST_CHECK_EQUAL(1, sum(acc));
  40     BOOST_CHECK_CLOSE(3., (accumulators::mean_of_variates<int, tag::covariate1>(acc)), 1e-5);
  41
  42     acc(0, covariate1 = 4);
  43     BOOST_CHECK_CLOSE(0.5, mean(acc), 1e-5);
  44     BOOST_CHECK_EQUAL(2u, count(acc));
  45     BOOST_CHECK_EQUAL(1, sum(acc));
  46     BOOST_CHECK_CLOSE(3.5, (accumulators::mean_of_variates<int, tag::covariate1>(acc)), 1e-5);
  47
  48     acc(2, covariate1 = 8);
  49     BOOST_CHECK_CLOSE(1., mean(acc), 1e-5);
  50     BOOST_CHECK_EQUAL(3u, count(acc));
  51     BOOST_CHECK_EQUAL(3, sum(acc));
  52     BOOST_CHECK_CLOSE(5., (accumulators::mean_of_variates<int, tag::covariate1>(acc)), 1e-5);
  53
  54     assert_is_double(mean(acc));
  55
  56     accumulator_set<
  57         int
  58       , stats<
  59             tag::mean(immediate)
  60           , tag::mean_of_variates<int, tag::covariate1>(immediate)
  61         >
  62     > acc2, test_acc2(sample = 0);
  63
  64     acc2(1, covariate1 = 3);
  65     BOOST_CHECK_CLOSE(1., mean(acc2), 1e-5);
  66     BOOST_CHECK_EQUAL(1u, count(acc2));
  67     BOOST_CHECK_CLOSE(3., (accumulators::mean_of_variates<int, tag::covariate1>(acc2)), 1e-5);
  68
  69     acc2(0, covariate1 = 4);
  70     BOOST_CHECK_CLOSE(0.5, mean(acc2), 1e-5);
  71     BOOST_CHECK_EQUAL(2u, count(acc2));
  72     BOOST_CHECK_CLOSE(3.5, (accumulators::mean_of_variates<int, tag::covariate1>(acc2)), 1e-5);
  73
  74     acc2(2, covariate1 = 8);
  75     BOOST_CHECK_CLOSE(1., mean(acc2), 1e-5);
  76     BOOST_CHECK_EQUAL(3u, count(acc2));
  77     BOOST_CHECK_CLOSE(5., (accumulators::mean_of_variates<int, tag::covariate1>(acc2)), 1e-5);
  78
  79     assert_is_double(mean(acc2));
  80 }
  81
  82 ///////////////////////////////////////////////////////////////////////////////
  83 // init_unit_test_suite
  84 //
  85 test_suite* init_unit_test_suite( int argc, char* argv[] )
  86 {
  87     test_suite *test = BOOST_TEST_SUITE("mean test");
  88
  89     test->add(BOOST_TEST_CASE(&test_stat));
  90
  91     return test;
  92 }