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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/weighted_mean.hpp>
using namespace boost;
using namespace unit_test;
using namespace accumulators;
///////////////////////////////////////////////////////////////////////////////
// test_stat
//
void test_stat()
{
accumulator_set<int, stats<tag::weighted_mean>, external<int> > acc;
accumulator_set<void, stats<tag::sum_of_weights>, int> weight_acc;
acc(10, weight = 2); // 20
weight_acc(weight = 2); //
BOOST_CHECK_EQUAL(2, sum_of_weights(weight_acc)); //
//
acc(6, weight = 3); // 18
weight_acc(weight = 3); //
BOOST_CHECK_EQUAL(5, sum_of_weights(weight_acc)); //
//
acc(4, weight = 4); // 16
weight_acc(weight = 4); //
BOOST_CHECK_EQUAL(9, sum_of_weights(weight_acc)); //
//
acc(6, weight = 5); //+ 30
weight_acc(weight = 5); //
BOOST_CHECK_EQUAL(14, sum_of_weights(weight_acc)); //
//= 84 / 14 = 6
BOOST_CHECK_CLOSE(6., weighted_mean(acc, weights = weight_acc), 1e-5);
}
///////////////////////////////////////////////////////////////////////////////
// init_unit_test_suite
//
test_suite* init_unit_test_suite( int argc, char* argv[] )
{
test_suite *test = BOOST_TEST_SUITE("external_weights test");
test->add(BOOST_TEST_CASE(&test_stat));
return test;
}
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