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
13 static int cmpint(const void *a, const void *b)
14 {
15 return *(int *)a - *(int *)b;
16 }
17
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 r = 48;
36
37 for (i = 0; i < TEST_LEN - 1; i++) {
38 r = (r * 725861) % 6599;
39 a[i] = r;
40 }
41
42 sort(a, TEST_LEN - 1, sizeof(*a), cmpint, NULL);
43
44 for (i = 0; i < TEST_LEN - 2; i++)
45 KUNIT_ASSERT_LE(test, a[i], a[i + 1]);
46 }
47
48 static struct kunit_case sort_test_cases[] = {
49 KUNIT_CASE(test_sort),
50 {}
51 };
52
53 static struct kunit_suite sort_test_suite = {
54 .name = "lib_sort",
55 .test_cases = sort_test_cases,
56 };
57
58 kunit_test_suites(&sort_test_suite);
59
60 MODULE_DESCRIPTION("sort() KUnit test suite");
61 MODULE_LICENSE("GPL");
62
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