1// SPDX-License-Identifier: GPL-2.0-only
 2
 3#include <kunit/test.h>
 4#include <linux/math.h>
 5
 6struct test_case_params {
 7	u64 base;
 8	unsigned int exponent;
 9	u64 expected_result;
10	const char *name;
11};
12
13static const struct test_case_params params[] = {
14	{ 64, 0, 1, "Power of zero" },
15	{ 64, 1, 64, "Power of one"},
16	{ 0, 5, 0, "Base zero" },
17	{ 1, 64, 1, "Base one" },
18	{ 2, 2, 4, "Two squared"},
19	{ 2, 3, 8, "Two cubed"},
20	{ 5, 5, 3125, "Five raised to the fifth power" },
21	{ U64_MAX, 1, U64_MAX, "Max base" },
22	{ 2, 63, 9223372036854775808ULL, "Large result"},
23};
24
25static void get_desc(const struct test_case_params *tc, char *desc)
26{
27	strscpy(desc, tc->name, KUNIT_PARAM_DESC_SIZE);
28}
29
30KUNIT_ARRAY_PARAM(int_pow, params, get_desc);
31
32static void int_pow_test(struct kunit *test)
33{
34	const struct test_case_params *tc = (const struct test_case_params *)test->param_value;
35
36	KUNIT_EXPECT_EQ(test, tc->expected_result, int_pow(tc->base, tc->exponent));
37}
38
39static struct kunit_case math_int_pow_test_cases[] = {
40	KUNIT_CASE_PARAM(int_pow_test, int_pow_gen_params),
41	{}
42};
43
44static struct kunit_suite int_pow_test_suite = {
45	.name = "math-int_pow",
46	.test_cases = math_int_pow_test_cases,
47};
48
49kunit_test_suites(&int_pow_test_suite);
50
51MODULE_DESCRIPTION("math.int_pow KUnit test suite");
52MODULE_LICENSE("GPL");