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// Copyright (C) Eric Niebler 2008.
// Copyright (C) Pieter Bastiaan Ober 2014.
// 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/mpl/assert.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/accumulators/accumulators.hpp>
#include <boost/accumulators/statistics/stats.hpp>
#include <boost/accumulators/statistics/rolling_mean.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;
template<typename T>
void assert_is_double(T const &)
{
BOOST_MPL_ASSERT((is_same<T, double>));
}
// test_rolling_mean_test_impl
// implements a test for window_size = 5
size_t window_size = 5;
template<typename accumulator_set_type>
void
test_rolling_mean_test_impl(accumulator_set_type& acc)
{
acc(1);
BOOST_CHECK_CLOSE(1., rolling_mean(acc), 1e-5);
acc(2);
BOOST_CHECK_CLOSE(1.5, rolling_mean(acc), 1e-5);
acc(3);
BOOST_CHECK_CLOSE(2., rolling_mean(acc), 1e-5);
acc(4);
BOOST_CHECK_CLOSE(2.5, rolling_mean(acc), 1e-5);
acc(5);
BOOST_CHECK_CLOSE(3., rolling_mean(acc), 1e-5);
acc(6);
BOOST_CHECK_CLOSE(4., rolling_mean(acc), 1e-5);
acc(7);
BOOST_CHECK_CLOSE(5., rolling_mean(acc), 1e-5);
assert_is_double(rolling_mean(acc));
}
template<typename accumulator_set_type>
void
test_rolling_mean_unsigned_test_impl(accumulator_set_type& acc)
{
acc(7U);
BOOST_CHECK_CLOSE(7., rolling_mean(acc), 1e-5);
acc(6U);
BOOST_CHECK_CLOSE(6.5, rolling_mean(acc), 1e-5);
acc(5U);
BOOST_CHECK_CLOSE(6., rolling_mean(acc), 1e-5);
acc(4U);
BOOST_CHECK_CLOSE(5.5, rolling_mean(acc), 1e-5);
acc(3U);
BOOST_CHECK_CLOSE(5., rolling_mean(acc), 1e-5);
acc(2U);
BOOST_CHECK_CLOSE(4., rolling_mean(acc), 1e-5);
acc(1U);
BOOST_CHECK_CLOSE(3., rolling_mean(acc), 1e-5);
assert_is_double(rolling_mean(acc));
}
///////////////////////////////////////////////////////////////////////////////
// test_persistency_impl
//
template<typename accumulator_set_type>
void test_persistency_impl(accumulator_set_type& acc)
{
std::stringstream ss;
{
acc(1);
acc(2);
acc(3);
acc(4);
acc(5);
acc(6);
acc(7);
BOOST_CHECK_CLOSE(5., rolling_mean(acc), 1e-5);
boost::archive::text_oarchive oa(ss);
acc.serialize(oa, 0);
}
// initialize from acc to make sure all values are passed
accumulator_set_type other_acc = acc;
// accumulate more, to make sure that deserialization set the right value
// and not the copy ctor
other_acc(100);
other_acc(100);
other_acc(100);
other_acc(100);
other_acc(100);
boost::archive::text_iarchive ia(ss);
other_acc.serialize(ia, 0);
BOOST_CHECK_CLOSE(5., rolling_mean(other_acc), 1e-5);
}
///////////////////////////////////////////////////////////////////////////////
// test_rolling_mean
void test_rolling_mean()
{
accumulator_set<int,stats<tag::immediate_rolling_mean> >
acc_immediate_rolling_mean(tag::immediate_rolling_mean::window_size = window_size),
acc_immediate_rolling_mean2(tag::immediate_rolling_mean::window_size = window_size, sample = 0);
accumulator_set<int,stats<tag::rolling_mean(immediate)> >
acc_immediate_rolling_mean3(tag::immediate_rolling_mean::window_size = window_size);
accumulator_set<int,stats<tag::lazy_rolling_mean> >
acc_lazy_rolling_mean(tag::lazy_rolling_mean::window_size = window_size),
acc_lazy_rolling_mean2(tag::lazy_rolling_mean::window_size = window_size, sample = 0);
accumulator_set<int,stats<tag::rolling_mean(lazy)> >
acc_lazy_rolling_mean3(tag::lazy_rolling_mean::window_size = window_size);
accumulator_set<int,stats<tag::rolling_mean> >
acc_default_rolling_mean(tag::rolling_mean::window_size = window_size),
acc_default_rolling_mean2(tag::rolling_mean::window_size = window_size, sample = 0);
//// test the different implementations
test_rolling_mean_test_impl(acc_lazy_rolling_mean);
test_rolling_mean_test_impl(acc_default_rolling_mean);
test_rolling_mean_test_impl(acc_immediate_rolling_mean);
test_rolling_mean_test_impl(acc_lazy_rolling_mean2);
test_rolling_mean_test_impl(acc_default_rolling_mean2);
test_rolling_mean_test_impl(acc_immediate_rolling_mean2);
test_rolling_mean_test_impl(acc_lazy_rolling_mean3);
test_rolling_mean_test_impl(acc_immediate_rolling_mean3);
//// test that the default implementation is the 'immediate' computation
BOOST_REQUIRE(sizeof(acc_lazy_rolling_mean) != sizeof(acc_immediate_rolling_mean));
BOOST_CHECK (sizeof(acc_default_rolling_mean) == sizeof(acc_immediate_rolling_mean));
//// test the equivalence of the different ways to indicate a feature
BOOST_CHECK (sizeof(acc_lazy_rolling_mean) == sizeof(acc_lazy_rolling_mean2));
BOOST_CHECK (sizeof(acc_lazy_rolling_mean) == sizeof(acc_lazy_rolling_mean3));
BOOST_CHECK (sizeof(acc_immediate_rolling_mean) == sizeof(acc_immediate_rolling_mean2));
BOOST_CHECK (sizeof(acc_immediate_rolling_mean) == sizeof(acc_immediate_rolling_mean3));
//// test unsigned int with both implementations
accumulator_set<unsigned int,stats<tag::immediate_rolling_mean> >
acc_immediate_rolling_mean4(tag::immediate_rolling_mean::window_size = window_size),
acc_immediate_rolling_mean5(tag::immediate_rolling_mean::window_size = window_size, sample = 0);
test_rolling_mean_unsigned_test_impl(acc_immediate_rolling_mean4);
test_rolling_mean_unsigned_test_impl(acc_immediate_rolling_mean5);
}
///////////////////////////////////////////////////////////////////////////////
// test_persistency
void test_persistency()
{
accumulator_set<int,stats<tag::immediate_rolling_mean> >
acc_immediate_rolling_mean(tag::immediate_rolling_mean::window_size = window_size),
acc_immediate_rolling_mean2(tag::immediate_rolling_mean::window_size = window_size, sample = 0);
accumulator_set<int,stats<tag::rolling_mean(immediate)> >
acc_immediate_rolling_mean3(tag::immediate_rolling_mean::window_size = window_size);
accumulator_set<int,stats<tag::lazy_rolling_mean> >
acc_lazy_rolling_mean(tag::lazy_rolling_mean::window_size = window_size),
acc_lazy_rolling_mean2(tag::lazy_rolling_mean::window_size = window_size, sample = 0);
accumulator_set<int,stats<tag::rolling_mean(lazy)> >
acc_lazy_rolling_mean3(tag::lazy_rolling_mean::window_size = window_size);
accumulator_set<int,stats<tag::rolling_mean> >
acc_default_rolling_mean(tag::rolling_mean::window_size = window_size),
acc_default_rolling_mean2(tag::rolling_mean::window_size = window_size, sample = 0);
//// test the different implementations
test_persistency_impl(acc_lazy_rolling_mean);
test_persistency_impl(acc_default_rolling_mean);
test_persistency_impl(acc_immediate_rolling_mean);
test_persistency_impl(acc_lazy_rolling_mean2);
test_persistency_impl(acc_default_rolling_mean2);
test_persistency_impl(acc_immediate_rolling_mean2);
test_persistency_impl(acc_lazy_rolling_mean3);
test_persistency_impl(acc_immediate_rolling_mean3);
}
///////////////////////////////////////////////////////////////////////////////
// init_unit_test_suite
//
test_suite* init_unit_test_suite( int argc, char* argv[] )
{
test_suite *test = BOOST_TEST_SUITE("rolling mean test");
test->add(BOOST_TEST_CASE(&test_rolling_mean));
test->add(BOOST_TEST_CASE(&test_persistency));
return test;
}
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