libs/test/test/test_fp_comparisons.cpp
// (C) Copyright Gennadiy Rozental 2001-2005.
// Distributed under 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)
// See http://www.boost.org/libs/test for the library home page.
//
// File : $RCSfile: test_fp_comparisons.cpp,v $
//
// Version : $Revision: 1.22 $
//
// Description : tests floating point comparison algorithms
// ***************************************************************************
// Boost.Test
#define BOOST_AUTO_TEST_MAIN
#include <boost/test/auto_unit_test.hpp>
#include <boost/test/test_case_template.hpp>
#include <boost/test/floating_point_comparison.hpp>
// Boost
#include <boost/mpl/list.hpp>
#include <boost/bind.hpp>
// STL
#include <functional>
using namespace boost;
using namespace boost::unit_test;
using namespace boost::test_tools;
bool not_func( bool arg ) { return !arg; }
//____________________________________________________________________________//
typedef boost::mpl::list<float,double,long double> test_types;
BOOST_AUTO_TEST_CASE_TEMPLATE( test_BOOST_CHECK_CLOSE, FPT, test_types )
{
#define CHECK_CLOSE( first, second, e ) \
fp1 = static_cast<FPT>(first); \
fp2 = static_cast<FPT>(second); \
epsilon = static_cast<FPT>(e); \
\
BOOST_CHECK_CLOSE( fp1, fp2, epsilon ); \
/**/
#define CHECK_NOT_CLOSE( first, second, e ) \
fp1 = static_cast<FPT>(first); \
fp2 = static_cast<FPT>(second); \
epsilon = static_cast<FPT>(e); \
\
BOOST_CHECK_PREDICATE( bind(not_func, bind(check_is_close, _1, _2, _3)), (fp1)(fp2)(epsilon) ); \
/**/
FPT fp1, fp2, epsilon;
CHECK_CLOSE( 1, 1, 0 );
CHECK_NOT_CLOSE( 0, 1e-20, 1e-5 );
CHECK_NOT_CLOSE( 0, 1e-30, 1e-5 );
CHECK_NOT_CLOSE( 0, -1e-10, 0.1 );
CHECK_NOT_CLOSE( 0.123456, 0.123457, 1e-4 );
CHECK_CLOSE( 0.123456, 0.123457, 1e-3 );
CHECK_NOT_CLOSE( 0.123456, -0.123457, 1e-3 );
CHECK_CLOSE( 1.23456e28, 1.23457e28, 1e-3 );
CHECK_CLOSE( 1.23456e-10, 1.23457e-10, 1e-3 );
CHECK_NOT_CLOSE( 1.111e-10, 1.112e-10, 0.08999 );
CHECK_CLOSE( 1.112e-10, 1.111e-10, 0.1 );
CHECK_CLOSE( 1, 1.0001, 1.1e-2 );
CHECK_CLOSE( 1.0002, 1.0001, 1.1e-2 );
CHECK_NOT_CLOSE( 1, 1.0002, 1.1e-2 );
}
//____________________________________________________________________________//
BOOST_AUTO_TEST_CASE( test_CHECK_SMALL )
{
BOOST_CHECK_SMALL( 1e-6, 1e-5 );
BOOST_CHECK_SMALL( -1e-6, 1e-5 );
BOOST_CHECK_PREDICATE( bind(not_func, bind(check_is_small, _1, _2 )), (1e-6)(1e-7) );
}
//____________________________________________________________________________//
BOOST_AUTO_TEST_CASE( test_close_at_tolerance )
{
double fp1 = 1.00000001;
double fp2 = 1.00000002;
double epsilon = 1e-6;
close_at_tolerance<double> pred( epsilon, FPC_WEAK );
BOOST_CHECK_PREDICATE( pred, (fp1)(fp2) );
BOOST_CHECK_PREDICATE( bind(not_func, bind(check_is_close, _1, _2, _3)), (fp1)(fp2)(epsilon) );
fp1 = 1.23456e-10;
fp2 = 1.23457e-10;
epsilon = 8.1e-4;
BOOST_CHECK_PREDICATE( close_at_tolerance<double>( epsilon, FPC_WEAK ), (fp1)(fp2) );
BOOST_CHECK_PREDICATE( bind(not_func, bind(close_at_tolerance<double>( epsilon ), _1, _2)), (fp1)(fp2) );
}
//____________________________________________________________________________//
// ***************************************************************************
// Revision History :
//
// $Log: test_fp_comparisons.cpp,v $
// Revision 1.22 2005/05/29 08:54:04 rogeeff
// remove format testing
//
// Revision 1.17 2005/02/20 08:28:34 rogeeff
// This a major update for Boost.Test framework. See release docs for complete list of fixes/updates
//
// ***************************************************************************
// EOF