text: #include "libft.h"
  #include "test_utils.h"
  #include <ctype.h>
  #include <stdio.h>
  
  int main(int argc, char *argv[])
  {
  	TEST_START
  		for (int i = -128; i <= 127; i++)
  			if ((char)ft_toupper(i) != (char)toupper(i))
  			{
  				// toupper returns a unsigned char while most ft_toupper implementations dont, so cast to char to not care
  				tu_ko_message_exit("(%i = ft_toupper(%i)) != (%i = toupper(%i))", ft_toupper(i), i, toupper(i), i);
  			}
  	TEST_END
  	return (0);
  }