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#include "libft.h"
#include "test_utils.h"
_S_CRASH (ft_substr_null, ft_substr (NULL, 0, 5))
static void
_s_test_substr (void)
{
int i;
char label[128];
_s_section ("ft_substr");
/* NULL crashes */
_s_check ("NULL crashes", _s_crashes (_s_crash_ft_substr_null));
/* basic substring from the middle */
{
char *p = ft_substr ("hello world", 6, 5);
_s_check ("middle", p && strcmp (p, "world") == 0);
free (p);
}
/* from the start */
{
char *p = ft_substr ("hello", 0, 3);
_s_check ("from start", p && strcmp (p, "hel") == 0);
free (p);
}
/* len larger than remaining string */
{
char *p = ft_substr ("hello", 2, 100);
_s_check ("len > remaining", p && strcmp (p, "llo") == 0);
free (p);
}
/* start beyond string length */
{
char *p = ft_substr ("hello", 10, 5);
_s_check ("start > slen", p && strcmp (p, "") == 0);
free (p);
}
/* start == string length */
{
char *p = ft_substr ("hello", 5, 5);
_s_check ("start == slen", p && strcmp (p, "") == 0);
free (p);
}
/* empty source string */
{
char *p = ft_substr ("", 0, 10);
_s_check ("empty src", p && strcmp (p, "") == 0);
free (p);
}
/* len == 0 */
{
char *p = ft_substr ("hello", 0, 0);
_s_check ("len=0", p && strcmp (p, "") == 0);
free (p);
}
/* full string copy */
{
char *p = ft_substr ("hello", 0, 5);
_s_check ("full copy", p && strcmp (p, "hello") == 0);
free (p);
}
/* single character */
{
char *p = ft_substr ("hello", 4, 1);
_s_check ("single char", p && strcmp (p, "o") == 0);
free (p);
}
/* returns independent copy */
{
char src[] = "hello";
char *p = ft_substr (src, 0, 5);
_s_check ("independent ptr", p && p != src);
free (p);
}
/* randomized */
for (i = 0; i < _S_RAND_ITERS; i++)
{
int slen = rand () % 200 + 1;
char *src = malloc (slen + 1);
unsigned int start;
size_t len;
char *p;
int j;
if (!src)
continue;
for (j = 0; j < slen; j++)
src[j] = 'A' + rand () % 26;
src[slen] = '\0';
start = rand () % (slen + 5);
len = rand () % (slen + 5);
p = ft_substr (src, start, len);
if (start >= (unsigned int)slen)
{
snprintf (label, sizeof (label), "random start=%u >= slen=%d", start,
slen);
_s_check (label, p && strcmp (p, "") == 0);
}
else
{
size_t remaining = slen - start;
size_t expected = remaining < len ? remaining : len;
snprintf (label, sizeof (label), "random start=%u len=%zu slen=%d",
start, len, slen);
_s_check (label, p && strlen (p) == expected
&& strncmp (p, src + start, expected) == 0);
}
free (p);
free (src);
}
}
int
main (void)
{
srand (time (NULL));
_s_test_substr ();
_s_print_results ();
return (_s_fail != 0);
}
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