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Add bit_floor_test

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Peter Dimov
2020-12-29 00:06:25 +02:00
parent 3b14a3677d
commit 579cb8f7f3
2 changed files with 54 additions and 0 deletions
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1
test/Jamfile.v2
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@ -228,6 +228,7 @@ run bit_countr_test.cpp ;
run bit_countl_test.cpp ;
run bit_width_test.cpp ;
run has_single_bit_test.cpp ;
run bit_floor_test.cpp ;
use-project /boost/core/swap : ./swap ;
build-project ./swap ;

53
test/bit_floor_test.cpp Normal file
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@ -0,0 +1,53 @@
// Test for boost/core/bit.hpp (bit_floor)
//
// Copyright 2020 Peter Dimov
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <boost/core/bit.hpp>
#include <boost/core/lightweight_test.hpp>
#include <boost/core/detail/splitmix64.hpp>
#include <boost/cstdint.hpp>
#include <limits>
template<class T> void test_bit_floor( T x )
{
T y = boost::core::bit_floor( x );
if( x == 0 )
{
BOOST_TEST_EQ( y, 0 );
}
else
{
BOOST_TEST( boost::core::has_single_bit( y ) );
BOOST_TEST_LE( y, x );
BOOST_TEST_GT( y, x >> 1 );
}
}
int main()
{
{
test_bit_floor( static_cast<unsigned char>( 0 ) );
test_bit_floor( static_cast<unsigned short>( 0 ) );
test_bit_floor( static_cast<unsigned int>( 0 ) );
test_bit_floor( static_cast<unsigned long>( 0 ) );
test_bit_floor( static_cast<unsigned long long>( 0 ) );
}
boost::detail::splitmix64 rng;
for( int i = 0; i < 1/*000*/; ++i )
{
boost::uint64_t x = rng();
test_bit_floor( static_cast<unsigned char>( x ) );
test_bit_floor( static_cast<unsigned short>( x ) );
test_bit_floor( static_cast<unsigned int>( x ) );
test_bit_floor( static_cast<unsigned long>( x ) );
test_bit_floor( static_cast<unsigned long long>( x ) );
}
return boost::report_errors();
}