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tests: add buf_add_char() test

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...to prove off-by-one test with ASAN.
This commit is contained in:
Johan Malm 2024-11-07 21:06:31 +00:00 • committed by Consolatis
parent 62a25da575
commit 44d1e199db
1 changed files with 25 additions and 0 deletions
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25
t/buf-simple.c
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@ -69,11 +69,36 @@ test_buf_add_fmt(void **state)
buf_reset(&s); buf_reset(&s);
} }
static void
test_buf_add_char(void **state)
{
(void)state;
const char long_string[] = "123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890";
size_t len = strlen(long_string);
/*
* Start off with a long string so that the allocated buffer is only
* just large enough to contain the string and the NULL termination.
*/
struct buf s = BUF_INIT;
buf_add(&s, long_string);
assert_int_equal(s.alloc, len + 1);
/* Check that buf_add_char() allocates space for the new character */
buf_add_char(&s, '+');
assert_true(s.alloc >= (int)len + 2);
assert_string_equal(s.data + s.len - 1, "+");
buf_reset(&s);
}
int main(int argc, char **argv) int main(int argc, char **argv)
{ {
const struct CMUnitTest tests[] = { const struct CMUnitTest tests[] = {
cmocka_unit_test(test_expand_title), cmocka_unit_test(test_expand_title),
cmocka_unit_test(test_buf_add_fmt), cmocka_unit_test(test_buf_add_fmt),
cmocka_unit_test(test_buf_add_char),
}; };
return cmocka_run_group_tests(tests, NULL, NULL); return cmocka_run_group_tests(tests, NULL, NULL);