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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/mean.hpp>
using namespace boost;
using namespace unit_test;
using namespace accumulators;
template<typename T>
void assert_is_double(T const &)
{
BOOST_MPL_ASSERT((is_same<T, double>));
}
///////////////////////////////////////////////////////////////////////////////
// test_stat
//
void test_stat()
{
accumulator_set<int, stats<droppable<tag::mean> > > acc, test_acc(sample = 0);
acc(1);
BOOST_CHECK_CLOSE(1., mean(acc), 1e-5);
BOOST_CHECK_EQUAL(1u, count(acc));
BOOST_CHECK_EQUAL(1, sum(acc));
acc(0);
BOOST_CHECK_CLOSE(0.5, mean(acc), 1e-5);
BOOST_CHECK_EQUAL(2u, count(acc));
BOOST_CHECK_EQUAL(1, sum(acc));
acc.drop<tag::mean>();
acc(2);
BOOST_CHECK_CLOSE(0.5, mean(acc), 1e-5);
BOOST_CHECK_EQUAL(2u, count(acc));
BOOST_CHECK_EQUAL(1, sum(acc));
assert_is_double(mean(acc));
accumulator_set<int, stats<droppable<tag::mean(immediate)> > > acc2, test_acc2(sample = 0);
acc2(1);
BOOST_CHECK_CLOSE(1., mean(acc2), 1e-5);
BOOST_CHECK_EQUAL(1u, count(acc2));
acc2(0);
BOOST_CHECK_CLOSE(0.5, mean(acc2), 1e-5);
BOOST_CHECK_EQUAL(2u, count(acc2));
acc2.drop<tag::mean>();
acc2(2);
BOOST_CHECK_CLOSE(0.5, mean(acc2), 1e-5);
BOOST_CHECK_EQUAL(2u, count(acc2));
assert_is_double(mean(acc2));
}
///////////////////////////////////////////////////////////////////////////////
// test_stat2
//
void test_stat2()
{
accumulator_set<int, stats<droppable<tag::sum>, droppable<tag::mean> > > acc, test_acc(sample = 0);
acc(1);
BOOST_CHECK_CLOSE(1., mean(acc), 1e-5);
BOOST_CHECK_EQUAL(1u, count(acc));
BOOST_CHECK_EQUAL(1, sum(acc));
acc(0);
BOOST_CHECK_CLOSE(0.5, mean(acc), 1e-5);
BOOST_CHECK_EQUAL(2u, count(acc));
BOOST_CHECK_EQUAL(1, sum(acc));
acc.drop<tag::mean>();
acc.drop<tag::sum>();
acc(2);
BOOST_CHECK_CLOSE(0.5, mean(acc), 1e-5);
BOOST_CHECK_EQUAL(2u, count(acc));
BOOST_CHECK_EQUAL(1, sum(acc));
assert_is_double(mean(acc));
}
///////////////////////////////////////////////////////////////////////////////
// test_stat3
//
void test_stat3()
{
accumulator_set<int, stats<droppable<tag::sum>, droppable<tag::count>, droppable<tag::mean> > > acc, test_acc(sample = 0);
acc(1);
BOOST_CHECK_CLOSE(1., mean(acc), 1e-5);
BOOST_CHECK_EQUAL(1u, count(acc));
BOOST_CHECK_EQUAL(1, sum(acc));
acc(0);
BOOST_CHECK_CLOSE(0.5, mean(acc), 1e-5);
BOOST_CHECK_EQUAL(2u, count(acc));
BOOST_CHECK_EQUAL(1, sum(acc));
acc.drop<tag::mean>();
acc.drop<tag::sum>();
acc(2);
BOOST_CHECK_CLOSE(1./3., mean(acc), 1e-5);
BOOST_CHECK_EQUAL(3u, count(acc));
BOOST_CHECK_EQUAL(1, sum(acc));
acc.drop<tag::count>();
acc(3);
BOOST_CHECK_CLOSE(1./3., mean(acc), 1e-5);
BOOST_CHECK_EQUAL(3u, count(acc));
BOOST_CHECK_EQUAL(1, sum(acc));
assert_is_double(mean(acc));
}
///////////////////////////////////////////////////////////////////////////////
// init_unit_test_suite
//
test_suite* init_unit_test_suite( int argc, char* argv[] )
{
test_suite *test = BOOST_TEST_SUITE("droppable test");
test->add(BOOST_TEST_CASE(&test_stat));
test->add(BOOST_TEST_CASE(&test_stat2));
test->add(BOOST_TEST_CASE(&test_stat3));
return test;
}
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