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/* Test assert().
*
* This is hairier than you'd think, involving games with
* stdio and signals.
*
*/
#include <signal.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <setjmp.h>
jmp_buf rec;
char buf[160];
void
sigabrt (int unused)
{
longjmp (rec, 1); /* recover control */
}
#undef NDEBUG
#include <assert.h>
void
assert1 (void)
{
assert (1 == 2);
}
void
assert2 (void)
{
assert (1 == 1);
}
#define NDEBUG
#include <assert.h>
void
assert3 (void)
{
assert (2 == 3);
}
int
main (void)
{
volatile int failed = 1;
fclose (stderr);
stderr = tmpfile ();
if(!stderr)
abort ();
signal (SIGABRT, sigabrt);
if (!setjmp (rec))
assert1 ();
else
failed = 0; /* should happen */
if (!setjmp (rec))
assert2 ();
else
failed = 1; /* should not happen */
if (!setjmp (rec))
assert3 ();
else
failed = 1; /* should not happen */
rewind (stderr);
fgets (buf, 160, stderr);
if (!strstr (buf, "1 == 2"))
failed = 1;
fgets (buf, 160, stderr);
if (strstr (buf, "1 == 1"))
failed = 1;
fgets (buf, 160, stderr);
if (strstr (buf, "2 == 3"))
failed = 1;
return failed;
}
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