mirror of https://gitee.com/bigwinds/arangodb
85 lines
2.2 KiB
C++
85 lines
2.2 KiB
C++
// Copyright (C) Eric Niebler 2005.
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// Copyright (C) Pieter Bastiaan Ober 2014.
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// Use, modification and distribution are subject to the
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// Boost Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#include <boost/test/unit_test.hpp>
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#include <boost/test/floating_point_comparison.hpp>
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#include <boost/mpl/assert.hpp>
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#include <boost/accumulators/accumulators.hpp>
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#include <boost/accumulators/statistics/stats.hpp>
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#include <boost/accumulators/statistics/rolling_moment.hpp>
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using namespace boost;
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using namespace unit_test;
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using namespace accumulators;
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template<typename T>
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void assert_is_double(T const &)
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{
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BOOST_MPL_ASSERT((is_same<T, double>));
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}
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///////////////////////////////////////////////////////////////////////////////
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// test_rolling_moment
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//
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void test_rolling_second_moment()
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{
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accumulator_set<int, stats<tag::rolling_moment<2> > > acc(tag::rolling_moment<2>::window_size = 3);
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acc(2);
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BOOST_CHECK_CLOSE(rolling_moment<2>(acc), 4.0/1 ,1e-5);
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acc(4);
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BOOST_CHECK_CLOSE(rolling_moment<2>(acc), (4.0 + 16.0)/2, 1e-5);
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acc(5);
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BOOST_CHECK_CLOSE(rolling_moment<2>(acc), (4.0 + 16.0 + 25.0)/3, 1e-5);
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acc(6);
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BOOST_CHECK_CLOSE(rolling_moment<2>(acc), (16.0 + 25.0 + 36.0)/3, 1e-5);
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assert_is_double(rolling_moment<2>(acc));
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}
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void test_rolling_fifth_moment()
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{
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accumulator_set<int, stats<tag::rolling_moment<5> > > acc(tag::rolling_moment<2>::window_size = 3);
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acc(2);
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BOOST_CHECK_CLOSE(rolling_moment<5>(acc), 32.0/1, 1e-5);
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acc(3);
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BOOST_CHECK_CLOSE(rolling_moment<5>(acc), (32.0 + 243.0)/2, 1e-5);
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acc(4);
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BOOST_CHECK_CLOSE(rolling_moment<5>(acc), (32.0 + 243.0 + 1024.0)/3, 1e-5);
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acc(5);
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BOOST_CHECK_CLOSE(rolling_moment<5>(acc), (243.0 + 1024.0 + 3125.0)/3, 1e-5);
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assert_is_double(rolling_moment<5>(acc));
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}
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///////////////////////////////////////////////////////////////////////////////
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// init_unit_test_suite
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//
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test_suite* init_unit_test_suite( int argc, char* argv[] )
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{
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test_suite *test = BOOST_TEST_SUITE("rolling moment test");
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test->add(BOOST_TEST_CASE(&test_rolling_second_moment));
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test->add(BOOST_TEST_CASE(&test_rolling_fifth_moment));
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return test;
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} |