// SPDX-License-Identifier: GPL-2.0-only #include <kunit/test.h>#include <linux/limits.h>#include <linux/math.h>#include <linux/module.h>#include <linux/string.h> struct test_case_params {	unsigned long x;	unsigned long expected_result;	const char *name;}; static const struct test_case_params params[] = {	{ 0, 0, "edge case: square root of 0" },	{ 1, 1, "perfect square: square root of 1" },	{ 2, 1, "non-perfect square: square root of 2" },	{ 3, 1, "non-perfect square: square root of 3" },	{ 4, 2, "perfect square: square root of 4" },	{ 5, 2, "non-perfect square: square root of 5" },	{ 6, 2, "non-perfect square: square root of 6" },	{ 7, 2, "non-perfect square: square root of 7" },	{ 8, 2, "non-perfect square: square root of 8" },	{ 9, 3, "perfect square: square root of 9" },	{ 15, 3, "non-perfect square: square root of 15 (N-1 from 16)" },	{ 16, 4, "perfect square: square root of 16" },	{ 17, 4, "non-perfect square: square root of 17 (N+1 from 16)" },	{ 80, 8, "non-perfect square: square root of 80 (N-1 from 81)" },	{ 81, 9, "perfect square: square root of 81" },	{ 82, 9, "non-perfect square: square root of 82 (N+1 from 81)" },	{ 255, 15, "non-perfect square: square root of 255 (N-1 from 256)" },	{ 256, 16, "perfect square: square root of 256" },	{ 257, 16, "non-perfect square: square root of 257 (N+1 from 256)" },	{ 2147483648, 46340, "large input: square root of 2147483648" },	{ 4294967295, 65535, "edge case: ULONG_MAX for 32-bit" },}; static void get_desc(const struct test_case_params *tc, char *desc){	strscpy(desc, tc->name, KUNIT_PARAM_DESC_SIZE);} KUNIT_ARRAY_PARAM(int_sqrt, params, get_desc); static void int_sqrt_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, int_sqrt(tc->x));} static struct kunit_case math_int_sqrt_test_cases[] = {	KUNIT_CASE_PARAM(int_sqrt_test, int_sqrt_gen_params),	{}}; static struct kunit_suite int_sqrt_test_suite = {	.name = "math-int_sqrt",	.test_cases = math_int_sqrt_test_cases,}; kunit_test_suites(&int_sqrt_test_suite); MODULE_DESCRIPTION("math.int_sqrt KUnit test suite");MODULE_LICENSE("GPL");