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// Copyright 2021, 2022 Peter Dimov.
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <boost/container_hash/hash.hpp>
#include <boost/core/lightweight_test.hpp>
#include <string>
#include <cstddef>
void test( std::size_t n, unsigned char ch )
{
typedef boost::hash<std::string> hash;
std::string const v( n, static_cast<char>( ch ) );
for( std::size_t i = 0; i < n * 8; ++i )
{
std::string w( v );
unsigned char ch2 = static_cast<unsigned char>( w[ i / 8 ] );
ch2 = static_cast<unsigned char>( ch2 ^ ( 1 << ( i % 8 ) ) );
w[ i / 8 ] = static_cast<char>( ch2 );
BOOST_TEST_NE( hash()( v ), hash()( w ) );
}
}
int main()
{
for( unsigned ch = 0; ch < 256; ++ch )
{
for( std::size_t n = 1; n < 32; ++n )
{
test( n, static_cast<unsigned char>( ch ) );
}
}
return boost::report_errors();
}
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