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/**
* @file test_utils.h
* @brief Minimal test harness for libft unit tests.
*
* Header-only: each test_*.c translation unit gets its own copy
* of the counters and helpers via static linkage.
*
* Output is compact: only failures are printed individually.
* Each section gets a one-line summary, and a totals line is
* printed at the end.
*/
#ifndef TEST_UTILS_H
#define TEST_UTILS_H
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
/* ── global counters ──────────────────────────────────────────────── */
static int _s_pass = 0;
static int _s_fail = 0;
static const char *_s_section_name = NULL;
static int _s_section_pass = 0;
static int _s_section_fail = 0;
static int _s_had_sections = 0;
/* volatile: prevent dead-store elimination when the return
value of the tested function is never read. */
static volatile size_t _s_sink;
static volatile int _s_sink_i;
/* ── sections and assertions ──────────────────────────────────────── */
/** Print the current section's summary line and reset its counters. */
static void
_s_section_end (void)
{
if (_s_section_name == NULL)
return;
if (_s_section_fail > 0)
printf (" %-16s %d passed, %d failed\n", _s_section_name, _s_section_pass,
_s_section_fail);
else
printf (" %-16s %d passed\n", _s_section_name, _s_section_pass);
_s_section_name = NULL;
_s_section_pass = 0;
_s_section_fail = 0;
}
/** Close the previous section (if any) and open a new one. */
static void
_s_section (const char *name)
{
_s_section_end ();
_s_section_name = name;
_s_had_sections = 1;
}
/** Record a pass (@p ok true) or print FAIL and record a failure. */
static void
_s_check (const char *label, int ok)
{
if (ok)
{
_s_pass++;
_s_section_pass++;
}
else
{
printf (" FAIL %s\n", label);
_s_fail++;
_s_section_fail++;
}
}
/** Pass if @p got == @p expected; on failure print both values. */
static void
_s_check_eq (const char *label, size_t got, size_t expected)
{
if (got == expected)
{
_s_pass++;
_s_section_pass++;
}
else
{
printf (" FAIL %s: got %zu, expected %zu\n", label, got, expected);
_s_fail++;
_s_section_fail++;
}
}
/** Pass if @p got == @p expected (int variant); print both on failure. */
static void
_s_check_eq_int (const char *label, int got, int expected)
{
if (got == expected)
{
_s_pass++;
_s_section_pass++;
}
else
{
printf (" FAIL %s: got %d, expected %d\n", label, got, expected);
_s_fail++;
_s_section_fail++;
}
}
/* ── crash detection ──────────────────────────────────────────────── */
/** Run @p fn in a child process; return 1 if it was killed by a signal. */
static int
_s_crashes (void (*fn) (void))
{
pid_t pid;
int status;
pid = fork ();
if (pid == 0)
{
fn ();
_exit (0);
}
waitpid (pid, &status, 0);
return (WIFSIGNALED (status));
}
static void
_s_check_both_crash (const char *label, void (*ft_fn) (void),
void (*libc_fn) (void))
{
int ft_crashed;
int libc_crashed;
ft_crashed = _s_crashes (ft_fn);
libc_crashed = _s_crashes (libc_fn);
if (ft_crashed == libc_crashed)
{
_s_pass++;
_s_section_pass++;
}
else
{
printf (" FAIL %s: ft_crashed=%d libc_crashed=%d\n", label,
ft_crashed, libc_crashed);
_s_fail++;
_s_section_fail++;
}
}
/* ── crash-wrapper macros ─────────────────────────────────────────── */
/* pointer-returning expression → _s_sink */
#define _S_CRASH(tag, expr) \
static void _s_crash_##tag (void) { _s_sink = (size_t)(expr); }
/* int-returning expression → _s_sink_i */
#define _S_CRASH_I(tag, expr) \
static void _s_crash_##tag (void) { _s_sink_i = (expr); }
/* void expression (e.g. ft_bzero) */
#define _S_CRASH_V(tag, expr) \
static void _s_crash_##tag (void) { (expr); }
/* needs a local char buf[N] before the expression */
#define _S_CRASH_BUF(tag, bufsz, expr) \
static void _s_crash_##tag (void) \
{ \
char buf[bufsz]; \
(void)buf; \
(expr); \
}
/* ── int-range comparison helper ─────────────────────────────────── */
/* Compare ft(i) vs libc(i) for i in [-1..255].
If normalize is true, compares !!ft(i) == !!libc(i) (for is* funcs).
Otherwise exact comparison (for toupper/tolower). */
static void
_s_test_int_range (const char *name, int (*ft) (int), int (*libc) (int),
int normalize)
{
int i;
int ft_r;
int libc_r;
int ok;
ok = 1;
for (i = -1; i <= 255; i++)
{
if (normalize)
{
ft_r = !!ft (i);
libc_r = !!libc (i);
}
else
{
ft_r = ft (i);
libc_r = libc (i);
}
if (ft_r != libc_r)
{
char label[64];
snprintf (label, sizeof (label), "%s(%d): ft=%d libc=%d", name, i,
ft_r, libc_r);
_s_check (label, 0);
ok = 0;
}
}
if (ok)
_s_check (name, 1);
}
/* ── helpers and output ───────────────────────────────────────────── */
#define _S_RAND_ITERS 50
/** Normalize to -1/0/1 for sign comparison (memcmp, strncmp). */
static int
_s_sign (int x)
{
if (x > 0)
return (1);
if (x < 0)
return (-1);
return (0);
}
static void
_s_print_results (void)
{
_s_section_end ();
if (_s_fail > 0)
printf (" %d passed, %d failed\n", _s_pass, _s_fail);
else if (!_s_had_sections)
printf (" %d passed\n", _s_pass);
}
#endif
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