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// SPDX-License-Identifier: GPL-2.0-only
#include <kunit/test.h>
#include <linux/gcd.h>
#include <linux/limits.h>
struct test_case_params {
unsigned long val1;
unsigned long val2;
unsigned long expected_result;
const char *name;
};
static const struct test_case_params params[] = {
{ 48, 18, 6, "GCD of 48 and 18" },
{ 18, 48, 6, "GCD of 18 and 48" },
{ 56, 98, 14, "GCD of 56 and 98" },
{ 17, 13, 1, "Coprime numbers" },
{ 101, 103, 1, "Coprime numbers" },
{ 270, 192, 6, "GCD of 270 and 192" },
{ 0, 5, 5, "GCD with zero" },
{ 7, 0, 7, "GCD with zero reversed" },
{ 36, 36, 36, "GCD of identical numbers" },
{ ULONG_MAX, 1, 1, "GCD of max ulong and 1" },
{ ULONG_MAX, ULONG_MAX, ULONG_MAX, "GCD of max ulong values" },
};
static void get_desc(const struct test_case_params *tc, char *desc)
{
strscpy(desc, tc->name, KUNIT_PARAM_DESC_SIZE);
}
KUNIT_ARRAY_PARAM(gcd, params, get_desc);
static void gcd_test(struct kunit *test)
{
const struct test_case_params *tc = (const struct test_case_params *)test->param_value;
KUNIT_EXPECT_EQ(test, tc->expected_result, gcd(tc->val1, tc->val2));
}
static struct kunit_case math_gcd_test_cases[] = {
KUNIT_CASE_PARAM(gcd_test, gcd_gen_params),
{}
};
static struct kunit_suite gcd_test_suite = {
.name = "math-gcd",
.test_cases = math_gcd_test_cases,
};
kunit_test_suite(gcd_test_suite);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("math.gcd KUnit test suite");
MODULE_AUTHOR("Yu-Chun Lin <eleanor15x@gmail.com>");
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