// SPDX-License-Identifier: GPL-2.0 #include <kunit/test.h> #include <linux/rational.h> struct rational_test_param {	unsigned long num, den;	unsigned long max_num, max_den;	unsigned long exp_num, exp_den; 	const char *name;}; static const struct rational_test_param test_parameters[] = {	{ 1230,	10,	100, 20,	100, 1,    "Exceeds bounds, semi-convergent term > 1/2 last term" },	{ 34567,100, 	120, 20,	120, 1,    "Exceeds bounds, semi-convergent term < 1/2 last term" },	{ 1, 30,	100, 10,	0, 1,	   "Closest to zero" },	{ 1, 19,	100, 10,	1, 10,     "Closest to smallest non-zero" },	{ 27,32,	16, 16,		11, 13,    "Use convergent" },	{ 1155, 7735,	255, 255,	33, 221,   "Exact answer" },	{ 87, 32,	70, 32,		68, 25,    "Semiconvergent, numerator limit" },	{ 14533, 4626,	15000, 2400,	7433, 2366, "Semiconvergent, denominator limit" },}; static void get_desc(const struct rational_test_param *param, char *desc){	strscpy(desc, param->name, KUNIT_PARAM_DESC_SIZE);} /* Creates function rational_gen_params */KUNIT_ARRAY_PARAM(rational, test_parameters, get_desc); static void rational_test(struct kunit *test){	const struct rational_test_param *param = (const struct rational_test_param *)test->param_value;	unsigned long n = 0, d = 0; 	rational_best_approximation(param->num, param->den, param->max_num, param->max_den, &n, &d);	KUNIT_EXPECT_EQ(test, n, param->exp_num);	KUNIT_EXPECT_EQ(test, d, param->exp_den);} static struct kunit_case rational_test_cases[] = {	KUNIT_CASE_PARAM(rational_test, rational_gen_params),	{}}; static struct kunit_suite rational_test_suite = {	.name = "rational",	.test_cases = rational_test_cases,}; kunit_test_suites(&rational_test_suite); MODULE_LICENSE("GPL v2");