Math.ut.cpp

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// The Reactive C++ Toolbox.
// Copyright (C) 2013-2019 Swirly Cloud Limited
// Copyright (C) 2021 Reactive Markets Limited
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
 
#include "Math.hpp"
 
#include <boost/test/unit_test.hpp>
 
using namespace std;
using namespace toolbox;
 
namespace utf = boost::unit_test;
 
BOOST_AUTO_TEST_SUITE(MathSuite)
 
BOOST_AUTO_TEST_CASE(NextPow2Case)
{
    BOOST_CHECK_EQUAL(next_pow2(1U), 1U);
    BOOST_CHECK_EQUAL(next_pow2(2U), 2U);
    BOOST_CHECK_EQUAL(next_pow2(3U), 4U);
    BOOST_CHECK_EQUAL(next_pow2(4U), 4U);
    BOOST_CHECK_EQUAL(next_pow2(5U), 8U);
    BOOST_CHECK_EQUAL(next_pow2(6U), 8U);
    BOOST_CHECK_EQUAL(next_pow2(7U), 8U);
    BOOST_CHECK_EQUAL(next_pow2(8U), 8U);
 
    BOOST_CHECK_EQUAL(next_pow2(1UL), 1UL);
    BOOST_CHECK_EQUAL(next_pow2(2UL), 2UL);
    BOOST_CHECK_EQUAL(next_pow2(3UL), 4UL);
    BOOST_CHECK_EQUAL(next_pow2(4UL), 4UL);
    BOOST_CHECK_EQUAL(next_pow2(5UL), 8UL);
    BOOST_CHECK_EQUAL(next_pow2(6UL), 8UL);
    BOOST_CHECK_EQUAL(next_pow2(7UL), 8UL);
    BOOST_CHECK_EQUAL(next_pow2(8UL), 8UL);
}
 
BOOST_AUTO_TEST_CASE(VarAccumCase, *utf::tolerance(0.0000001))
{
    VarAccum v;
    v.append(1345, 1301, 1368, 1322, 1310, 1370, 1318, 1350, 1303, 1299);
    BOOST_CHECK_EQUAL(v.size(), 10U);
    BOOST_CHECK_EQUAL(v.mean(), 1328.6);
    BOOST_CHECK_CLOSE_FRACTION(var(v), 754.2666667, 1e-7);
    BOOST_CHECK_CLOSE_FRACTION(varp(v), 678.84, 1e-7);
    BOOST_CHECK_CLOSE_FRACTION(stdev(v), 27.4639157, 1e-7);
    BOOST_CHECK_CLOSE_FRACTION(stdevp(v), 26.0545581, 1e-7);
    BOOST_CHECK_EQUAL(v.min(), 1299);
    BOOST_CHECK_EQUAL(v.max(), 1370);
}
 
BOOST_AUTO_TEST_CASE(CeilCase)
{
    BOOST_CHECK_EQUAL(ceil(1U, 3U), 1U);
    BOOST_CHECK_EQUAL(ceil(2U, 3U), 1U);
    BOOST_CHECK_EQUAL(ceil(3U, 3U), 1U);
    BOOST_CHECK_EQUAL(ceil(4U, 3U), 2U);
    BOOST_CHECK_EQUAL(ceil(5U, 3U), 2U);
    BOOST_CHECK_EQUAL(ceil(6U, 3U), 2U);
}
 
BOOST_AUTO_TEST_SUITE_END()