LXR linux/lib/test

   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