1// SPDX-License-Identifier: GPL-2.0-only
2
3#include <kunit/test.h>
4
5#include <linux/sort.h>
6#include <linux/slab.h>
7#include <linux/module.h>
8
9/* a simple boot-time regression test */
10
11#define TEST_LEN 1000
12
13static int cmpint(const void *a, const void *b)
14{
15	return *(int *)a - *(int *)b;
16}
17
18static void test_sort(struct kunit *test)
19{
20	int *a, i, r = 1;
21
22	a = kunit_kmalloc_array(test, TEST_LEN, sizeof(*a), GFP_KERNEL);
23	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, a);
24
25	for (i = 0; i < TEST_LEN; i++) {
26		r = (r * 725861) % 6599;
27		a[i] = r;
28	}
29
30	sort(a, TEST_LEN, sizeof(*a), cmpint, NULL);
31
32	for (i = 0; i < TEST_LEN-1; i++)
33		KUNIT_ASSERT_LE(test, a[i], a[i + 1]);
34}
35
36static struct kunit_case sort_test_cases[] = {
37	KUNIT_CASE(test_sort),
38	{}
39};
40
41static struct kunit_suite sort_test_suite = {
42	.name = "lib_sort",
43	.test_cases = sort_test_cases,
44};
45
46kunit_test_suites(&sort_test_suite);
47
48MODULE_LICENSE("GPL");
49