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/*
* SPDX-FileCopyrightText: 2023, Alejandro Colomar <alx@kernel.org>
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <setjmp.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h> // Required by <cmocka.h>
#include <stddef.h> // Required by <cmocka.h>
#include <setjmp.h> // Required by <cmocka.h>
#include <stdint.h> // Required by <cmocka.h>
#include <cmocka.h>
#include "string/sprintf.h"
#define assert_unreachable() assert_true(0)
#define XASPRINTF_CALLED (-36)
#define EXIT_CALLED (42)
#define TEST_OK (-6)
static jmp_buf jmpb;
/**********************
* WRAPPERS
**********************/
int __real_vasprintf(char **restrict p, const char *restrict fmt, va_list ap);
int __wrap_vasprintf(char **restrict p, const char *restrict fmt, va_list ap);
void __wrap_exit(int status);
int
__wrap_vasprintf(char **restrict p, const char *restrict fmt, va_list ap)
{
return mock() == -1 ? -1 : __real_vasprintf(p, fmt, ap);
}
void
__wrap_exit(int status)
{
longjmp(jmpb, EXIT_CALLED);
}
/**********************
* TEST
**********************/
static void test_xasprintf_exit(void **state);
static void test_xasprintf_ok(void **state);
static void
test_xasprintf_exit(void **state)
{
volatile int len;
char *volatile p;
will_return(__wrap_vasprintf, -1);
len = 0;
switch (setjmp(jmpb)) {
case 0:
len = XASPRINTF_CALLED;
len = xasprintf(&p, "foo%s", "bar");
assert_unreachable();
break;
case EXIT_CALLED:
assert_int_equal(len, XASPRINTF_CALLED);
len = TEST_OK;
break;
default:
assert_unreachable();
break;
}
assert_int_equal(len, TEST_OK);
}
static void
test_xasprintf_ok(void **state)
{
int len;
char *p;
// Trick: it will actually return the length, not 0.
will_return(__wrap_vasprintf, 0);
len = xasprintf(&p, "foo%d%s", 1, "bar");
assert_int_equal(len, strlen("foo1bar"));
assert_string_equal(p, "foo1bar");
free(p);
}
int
main(void)
{
const struct CMUnitTest tests[] = {
cmocka_unit_test(test_xasprintf_exit),
cmocka_unit_test(test_xasprintf_ok),
};
return cmocka_run_group_tests(tests, NULL, NULL);
}
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