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// (C) Copyright Gaetano Mendola 2010, Simon West 2011.
// Use, modification and distribution are subject to 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)
#include <boost/test/unit_test.hpp>
#include <boost/accumulators/accumulators.hpp>
#include <boost/accumulators/statistics/stats.hpp>
#include <boost/accumulators/statistics/sum_kahan.hpp>
#include <boost/accumulators/statistics/variates/covariate.hpp>
#include <sstream>
#include <boost/archive/text_oarchive.hpp>
#include <boost/archive/text_iarchive.hpp>
using namespace boost;
using namespace unit_test;
using namespace accumulators;
///////////////////////////////////////////////////////////////////////////////
// test_sum_kahan
//
void test_sum_kahan()
{
accumulator_set<float, stats<tag::sum_kahan> > acc;
BOOST_CHECK_EQUAL(0.0f, sum_kahan(acc));
for (size_t i = 0; i < 1e6; ++i) {
acc(1e-6f);
}
BOOST_CHECK_EQUAL(1.0f, sum_kahan(acc));
}
///////////////////////////////////////////////////////////////////////////////
// test_sum_of_weights_kahan
//
void test_sum_of_weights_kahan()
{
accumulator_set<float, stats<tag::sum_of_weights_kahan>, float > acc;
BOOST_CHECK_EQUAL(0.0f, sum_of_weights_kahan(acc));
for (size_t i = 0; i < 1e6; ++i) {
acc(0, weight = 1e-6f);
}
BOOST_CHECK_EQUAL(1.0f, sum_of_weights_kahan(acc));
}
///////////////////////////////////////////////////////////////////////////////
// test_sum_of_variates_kahan
//
void test_sum_of_variates_kahan()
{
accumulator_set<
float,
stats<tag::sum_of_variates_kahan<float, tag::covariate1> >,
float
>
acc;
BOOST_CHECK_EQUAL(0.0f, sum_of_variates_kahan(acc));
for (size_t i = 0; i < 1e6; ++i) {
acc(0, covariate1 = 1e-6f);
}
BOOST_CHECK_EQUAL(1.0f, sum_of_variates_kahan(acc));
}
///////////////////////////////////////////////////////////////////////////////
// test_persistency
//
void test_persistency()
{
std::stringstream ss;
{
accumulator_set<
float,
stats<tag::sum_of_variates_kahan<float, tag::covariate1> >,
float
>
acc;
BOOST_CHECK_EQUAL(0.0f, sum_of_variates_kahan(acc));
for (size_t i = 0; i < 1e6; ++i) {
acc(0, covariate1 = 1e-6f);
}
BOOST_CHECK_EQUAL(1.0f, sum_of_variates_kahan(acc));
boost::archive::text_oarchive oa(ss);
acc.serialize(oa, 0);
}
accumulator_set<
float,
stats<tag::sum_of_variates_kahan<float, tag::covariate1> >,
float
>
acc;
boost::archive::text_iarchive ia(ss);
acc.serialize(ia, 0);
BOOST_CHECK_EQUAL(1.0f, sum_of_variates_kahan(acc));
}
///////////////////////////////////////////////////////////////////////////////
// init_unit_test_suite
//
test_suite* init_unit_test_suite( int argc, char* argv[] )
{
test_suite *test = BOOST_TEST_SUITE("sum kahan tests");
test->add(BOOST_TEST_CASE(&test_sum_kahan));
test->add(BOOST_TEST_CASE(&test_sum_of_weights_kahan));
test->add(BOOST_TEST_CASE(&test_sum_of_variates_kahan));
test->add(BOOST_TEST_CASE(&test_persistency));
return test;
}
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