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#ifndef _EZPWD_ASSERTER
#define _EZPWD_ASSERTER
#include <algorithm>
#include <cstring>
#include <iostream>
#include <iomanip>
#include <sstream>
namespace ezpwd {
#define ISEQUAL( ... ) isequal(__FILE__, __LINE__, __VA_ARGS__ )
#define ISTRUE( ... ) istrue( __FILE__, __LINE__, __VA_ARGS__ )
#define ISFALSE( ... ) isfalse(__FILE__, __LINE__, __VA_ARGS__ )
#define ISNEAR( ... ) isnear( __FILE__, __LINE__, __VA_ARGS__ )
#define FAILURE( ... ) failure(__FILE__, __LINE__, __VA_ARGS__ )
struct asserter {
bool failed; // The last test failed
int failures; // Total number of failures
std::string out; // Last failure
asserter()
: failed( false )
, failures( 0 )
, out()
{
;
}
//
// output( <std::ostream> ) -- Output description of last failed test (or nothing if successful)
// <std::ostream> << <asserter>
//
std::ostream &output(
std::ostream &lhs )
const
{
return lhs << out;
}
//
// (bool) <asserter> -- Return status of last test
//
operator bool()
{
return failed;
}
template < typename T >
asserter &istrue( const char *file, int line, const T &a, const std::string &comment = std::string() )
{
return isequal( file, line, !!a, true, comment );
}
template < typename T >
asserter &isfalse( const char *file, int line, const T &a, const std::string &comment = std::string() )
{
return isequal( file, line, !!a, false, comment );
}
template < typename T >
asserter &isequal( const char *file, int line, const T &a, const T &b, const std::string &comment = std::string() )
{
if ( ! ( a == b )) {
std::ostringstream oss;
oss << a << " != " << b;
return failure( file, line, oss.str(), comment );
}
return success();
}
template < typename T >
asserter &isnear( const char *file, int line, const T &a, const T &b, const T &delta, const std::string &comment = std::string() )
{
T difference;
difference = ( a < b
? T( b - a )
: T( a - b ));
if ( ! ( difference < ( delta < T( 0 ) ? T( -delta ) : T( delta )))) {
std::ostringstream oss;
oss << std::setprecision( 13 ) << a << " != " << b << " +/- " << delta;
return failure( file, line, oss.str(), comment );
}
return success();
}
asserter &failure( const char *file, int line, const std::string &comparison,
const std::string &comment = std::string() )
{
++failures;
const char *needle = "/";
const char *slash = std::find_end( file, file + strlen( file ),
needle, needle + strlen( needle ));
if ( slash == file + strlen( file ))
slash = file;
else
slash += 1;
std::ostringstream oss;
oss
<< std::setw( 24 ) << slash << ", "
<< std::setw( -5 ) << line
<< "; FAILURE: " << comparison
<< ( comment.size() ? ": " : "" ) << comment
<< std::endl;
out = oss.str();
failed = true;
return *this;
}
asserter &success()
{
out.clear();
failed = false;
return *this;
}
}; // class asserter
} // namespace ezpwd
std::ostream &operator<<(
std::ostream &lhs,
ezpwd::asserter &rhs )
{
return rhs.output( lhs );
}
#endif // _EZPWD_ARRAY
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