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// (C) Copyright Eric Niebler 2005.
// 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/test/tools/floating_point_comparison.hpp>
#include <boost/accumulators/accumulators.hpp>
#include <boost/accumulators/statistics/stats.hpp>
#include <boost/accumulators/statistics/moment.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_stat
//
void test_stat()
{
accumulator_set<int, stats<tag::moment<2> > > acc1;
acc1(2); // 4
acc1(4); // 16
acc1(5); // + 25
// = 45 / 3 = 15
BOOST_CHECK_CLOSE(15., accumulators::moment<2>(acc1), 1e-5);
accumulator_set<int, stats<tag::moment<5> > > acc2;
acc2(2); // 32
acc2(3); // 243
acc2(4); // 1024
acc2(5); // + 3125
// = 4424 / 4 = 1106
BOOST_CHECK_CLOSE(1106., accumulators::moment<5>(acc2), 1e-5);
}
///////////////////////////////////////////////////////////////////////////////
// test_persistency
//
void test_persistency()
{
double epsilon = 1e-5;
std::stringstream ss;
{
accumulator_set<int, stats<tag::moment<2> > > acc;
acc(2); // 4
acc(4); // 16
acc(5); // + 25
// = 45 / 3 = 15
BOOST_CHECK_CLOSE(15., accumulators::moment<2>(acc), epsilon);
boost::archive::text_oarchive oa(ss);
acc.serialize(oa, 0);
}
accumulator_set<int, stats<tag::moment<2> > > acc;
boost::archive::text_iarchive ia(ss);
acc.serialize(ia, 0);
BOOST_CHECK_CLOSE(15., accumulators::moment<2>(acc), epsilon);
}
///////////////////////////////////////////////////////////////////////////////
// init_unit_test_suite
//
test_suite* init_unit_test_suite( int argc, char* argv[] )
{
test_suite *test = BOOST_TEST_SUITE("moment test");
test->add(BOOST_TEST_CASE(&test_stat));
test->add(BOOST_TEST_CASE(&test_persistency));
return test;
}
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