ceph/src/boost/libs/accumulators/test/external_accumulator.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/mean.hpp>
  11
  12 using namespace boost;
  13 using namespace unit_test;
  14 using namespace accumulators;
  15
  16 namespace my
  17 {
  18     BOOST_PARAMETER_KEYWORD(tag, sum_acc)
  19 }
  20
  21 ///////////////////////////////////////////////////////////////////////////////
  22 // test_stat
  23 //
  24 void test_stat()
  25 {
  26     accumulator_set<int, stats<tag::mean, tag::external<tag::sum, my::tag::sum_acc> > > acc;
  27     accumulator_set<int, stats<tag::sum> > sum_acc;
  28
  29     acc(1);
  30     sum_acc(1);
  31     BOOST_CHECK_CLOSE(1., mean(acc, my::sum_acc = sum_acc), 1e-5);
  32     BOOST_CHECK_EQUAL(1u, count(acc));
  33     BOOST_CHECK_EQUAL(1, sum(sum_acc));
  34
  35     acc(0);
  36     sum_acc(0);
  37     BOOST_CHECK_CLOSE(0.5, mean(acc, my::sum_acc = sum_acc), 1e-5);
  38     BOOST_CHECK_EQUAL(2u, count(acc));
  39     BOOST_CHECK_EQUAL(1, sum(acc, my::sum_acc = sum_acc));
  40
  41     acc(2);
  42     sum_acc(2);
  43     BOOST_CHECK_CLOSE(1., mean(acc, my::sum_acc = sum_acc), 1e-5);
  44     BOOST_CHECK_EQUAL(3u, count(acc));
  45     BOOST_CHECK_EQUAL(3, sum(acc, my::sum_acc = sum_acc));
  46 }
  47
  48 ///////////////////////////////////////////////////////////////////////////////
  49 // test_reference
  50 //
  51 void test_reference()
  52 {
  53     typedef accumulator_set<int, stats<tag::sum> > sum_acc_type;
  54     sum_acc_type sum_acc;
  55     accumulator_set<
  56         int
  57       , stats<
  58             tag::mean
  59           , tag::external<tag::sum, my::tag::sum_acc>
  60           , tag::reference<sum_acc_type, my::tag::sum_acc>
  61         >
  62     > acc(my::sum_acc = sum_acc);
  63
  64     acc(1);
  65     sum_acc(1);
  66     BOOST_CHECK_CLOSE(1., mean(acc), 1e-5);
  67     BOOST_CHECK_EQUAL(1u, count(acc));
  68     BOOST_CHECK_EQUAL(1, sum(sum_acc));
  69
  70     acc(0);
  71     sum_acc(0);
  72     BOOST_CHECK_CLOSE(0.5, mean(acc), 1e-5);
  73     BOOST_CHECK_EQUAL(2u, count(acc));
  74     BOOST_CHECK_EQUAL(1, sum(acc));
  75
  76     acc(2);
  77     sum_acc(2);
  78     BOOST_CHECK_CLOSE(1., mean(acc), 1e-5);
  79     BOOST_CHECK_EQUAL(3u, count(acc));
  80     BOOST_CHECK_EQUAL(3, sum(acc));
  81 }
  82
  83 ///////////////////////////////////////////////////////////////////////////////
  84 // test_reference2
  85 //
  86 void test_reference2()
  87 {
  88     typedef accumulator_set<int, stats<tag::sum> > sum_acc_type;
  89     sum_acc_type sum_acc;
  90     accumulator_set<
  91         int
  92       , stats<
  93             tag::mean
  94           , tag::external<tag::sum, my::tag::sum_acc, sum_acc_type>
  95         >
  96     > acc(my::sum_acc = sum_acc);
  97
  98     acc(1);
  99     sum_acc(1);
 100     BOOST_CHECK_CLOSE(1., mean(acc), 1e-5);
 101     BOOST_CHECK_EQUAL(1u, count(acc));
 102     BOOST_CHECK_EQUAL(1, sum(sum_acc));
 103
 104     acc(0);
 105     sum_acc(0);
 106     BOOST_CHECK_CLOSE(0.5, mean(acc), 1e-5);
 107     BOOST_CHECK_EQUAL(2u, count(acc));
 108     BOOST_CHECK_EQUAL(1, sum(acc));
 109
 110     acc(2);
 111     sum_acc(2);
 112     BOOST_CHECK_CLOSE(1., mean(acc), 1e-5);
 113     BOOST_CHECK_EQUAL(3u, count(acc));
 114     BOOST_CHECK_EQUAL(3, sum(acc));
 115 }
 116
 117 ///////////////////////////////////////////////////////////////////////////////
 118 // init_unit_test_suite
 119 //
 120 test_suite* init_unit_test_suite( int argc, char* argv[] )
 121 {
 122     test_suite *test = BOOST_TEST_SUITE("external_accumulator test");
 123
 124     test->add(BOOST_TEST_CASE(&test_stat));
 125     test->add(BOOST_TEST_CASE(&test_reference));
 126     test->add(BOOST_TEST_CASE(&test_reference2));
 127
 128     return test;
 129 }