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
cmpint(const void * a,const void * b)13 static int cmpint(const void *a, const void *b)
14 {
15 return *(int *)a - *(int *)b;
16 }
17
test_sort(struct kunit * test)18 static 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
36 static struct kunit_case sort_test_cases[] = {
37 KUNIT_CASE(test_sort),
38 {}
39 };
40
41 static struct kunit_suite sort_test_suite = {
42 .name = "lib_sort",
43 .test_cases = sort_test_cases,
44 };
45
46 kunit_test_suites(&sort_test_suite);
47
48 MODULE_LICENSE("GPL");
49