prime_numbers_kunit.c

 1// SPDX-License-Identifier: GPL-2.0-only
 2
 3#include <kunit/test.h>
 4#include <linux/module.h>
 5#include <linux/prime_numbers.h>
 6
 7#include "../prime_numbers_private.h"
 8
 9static void dump_primes(void *ctx, const struct primes *p)
10{
11	static char buf[PAGE_SIZE];
12	struct kunit_suite *suite = ctx;
13
14	bitmap_print_to_pagebuf(true, buf, p->primes, p->sz);
15	kunit_info(suite, "primes.{last=%lu, .sz=%lu, .primes[]=...x%lx} = %s",
16		   p->last, p->sz, p->primes[BITS_TO_LONGS(p->sz) - 1], buf);
17}
18
19static void prime_numbers_test(struct kunit *test)
20{
21	const unsigned long max = 65536;
22	unsigned long x, last, next;
23
24	for (last = 0, x = 2; x < max; x++) {
25		const bool slow = slow_is_prime_number(x);
26		const bool fast = is_prime_number(x);
27
28		KUNIT_ASSERT_EQ_MSG(test, slow, fast, "is-prime(%lu)", x);
29
30		if (!slow)
31			continue;
32
33		next = next_prime_number(last);
34		KUNIT_ASSERT_EQ_MSG(test, next, x, "next-prime(%lu)", last);
35		last = next;
36	}
37}
38
39static void kunit_suite_exit(struct kunit_suite *suite)
40{
41	with_primes(suite, dump_primes);
42}
43
44static struct kunit_case prime_numbers_cases[] = {
45	KUNIT_CASE(prime_numbers_test),
46	{},
47};
48
49static struct kunit_suite prime_numbers_suite = {
50	.name = "math-prime_numbers",
51	.suite_exit = kunit_suite_exit,
52	.test_cases = prime_numbers_cases,
53};
54
55kunit_test_suite(prime_numbers_suite);
56
57MODULE_AUTHOR("Intel Corporation");
58MODULE_DESCRIPTION("Prime number library");
59MODULE_LICENSE("GPL");