1*0fafc9e1SLuis Felipe Hernandez // SPDX-License-Identifier: GPL-2.0-only 2*0fafc9e1SLuis Felipe Hernandez 3*0fafc9e1SLuis Felipe Hernandez #include <kunit/test.h> 4*0fafc9e1SLuis Felipe Hernandez #include <linux/limits.h> 5*0fafc9e1SLuis Felipe Hernandez #include <linux/math.h> 6*0fafc9e1SLuis Felipe Hernandez #include <linux/module.h> 7*0fafc9e1SLuis Felipe Hernandez #include <linux/string.h> 8*0fafc9e1SLuis Felipe Hernandez 9*0fafc9e1SLuis Felipe Hernandez struct test_case_params { 10*0fafc9e1SLuis Felipe Hernandez unsigned long x; 11*0fafc9e1SLuis Felipe Hernandez unsigned long expected_result; 12*0fafc9e1SLuis Felipe Hernandez const char *name; 13*0fafc9e1SLuis Felipe Hernandez }; 14*0fafc9e1SLuis Felipe Hernandez 15*0fafc9e1SLuis Felipe Hernandez static const struct test_case_params params[] = { 16*0fafc9e1SLuis Felipe Hernandez { 0, 0, "edge case: square root of 0" }, 17*0fafc9e1SLuis Felipe Hernandez { 1, 1, "perfect square: square root of 1" }, 18*0fafc9e1SLuis Felipe Hernandez { 2, 1, "non-perfect square: square root of 2" }, 19*0fafc9e1SLuis Felipe Hernandez { 3, 1, "non-perfect square: square root of 3" }, 20*0fafc9e1SLuis Felipe Hernandez { 4, 2, "perfect square: square root of 4" }, 21*0fafc9e1SLuis Felipe Hernandez { 5, 2, "non-perfect square: square root of 5" }, 22*0fafc9e1SLuis Felipe Hernandez { 6, 2, "non-perfect square: square root of 6" }, 23*0fafc9e1SLuis Felipe Hernandez { 7, 2, "non-perfect square: square root of 7" }, 24*0fafc9e1SLuis Felipe Hernandez { 8, 2, "non-perfect square: square root of 8" }, 25*0fafc9e1SLuis Felipe Hernandez { 9, 3, "perfect square: square root of 9" }, 26*0fafc9e1SLuis Felipe Hernandez { 15, 3, "non-perfect square: square root of 15 (N-1 from 16)" }, 27*0fafc9e1SLuis Felipe Hernandez { 16, 4, "perfect square: square root of 16" }, 28*0fafc9e1SLuis Felipe Hernandez { 17, 4, "non-perfect square: square root of 17 (N+1 from 16)" }, 29*0fafc9e1SLuis Felipe Hernandez { 80, 8, "non-perfect square: square root of 80 (N-1 from 81)" }, 30*0fafc9e1SLuis Felipe Hernandez { 81, 9, "perfect square: square root of 81" }, 31*0fafc9e1SLuis Felipe Hernandez { 82, 9, "non-perfect square: square root of 82 (N+1 from 81)" }, 32*0fafc9e1SLuis Felipe Hernandez { 255, 15, "non-perfect square: square root of 255 (N-1 from 256)" }, 33*0fafc9e1SLuis Felipe Hernandez { 256, 16, "perfect square: square root of 256" }, 34*0fafc9e1SLuis Felipe Hernandez { 257, 16, "non-perfect square: square root of 257 (N+1 from 256)" }, 35*0fafc9e1SLuis Felipe Hernandez { 2147483648, 46340, "large input: square root of 2147483648" }, 36*0fafc9e1SLuis Felipe Hernandez { 4294967295, 65535, "edge case: ULONG_MAX for 32-bit" }, 37*0fafc9e1SLuis Felipe Hernandez }; 38*0fafc9e1SLuis Felipe Hernandez 39*0fafc9e1SLuis Felipe Hernandez static void get_desc(const struct test_case_params *tc, char *desc) 40*0fafc9e1SLuis Felipe Hernandez { 41*0fafc9e1SLuis Felipe Hernandez strscpy(desc, tc->name, KUNIT_PARAM_DESC_SIZE); 42*0fafc9e1SLuis Felipe Hernandez } 43*0fafc9e1SLuis Felipe Hernandez 44*0fafc9e1SLuis Felipe Hernandez KUNIT_ARRAY_PARAM(int_sqrt, params, get_desc); 45*0fafc9e1SLuis Felipe Hernandez 46*0fafc9e1SLuis Felipe Hernandez static void int_sqrt_test(struct kunit *test) 47*0fafc9e1SLuis Felipe Hernandez { 48*0fafc9e1SLuis Felipe Hernandez const struct test_case_params *tc = (const struct test_case_params *)test->param_value; 49*0fafc9e1SLuis Felipe Hernandez 50*0fafc9e1SLuis Felipe Hernandez KUNIT_EXPECT_EQ(test, tc->expected_result, int_sqrt(tc->x)); 51*0fafc9e1SLuis Felipe Hernandez } 52*0fafc9e1SLuis Felipe Hernandez 53*0fafc9e1SLuis Felipe Hernandez static struct kunit_case math_int_sqrt_test_cases[] = { 54*0fafc9e1SLuis Felipe Hernandez KUNIT_CASE_PARAM(int_sqrt_test, int_sqrt_gen_params), 55*0fafc9e1SLuis Felipe Hernandez {} 56*0fafc9e1SLuis Felipe Hernandez }; 57*0fafc9e1SLuis Felipe Hernandez 58*0fafc9e1SLuis Felipe Hernandez static struct kunit_suite int_sqrt_test_suite = { 59*0fafc9e1SLuis Felipe Hernandez .name = "math-int_sqrt", 60*0fafc9e1SLuis Felipe Hernandez .test_cases = math_int_sqrt_test_cases, 61*0fafc9e1SLuis Felipe Hernandez }; 62*0fafc9e1SLuis Felipe Hernandez 63*0fafc9e1SLuis Felipe Hernandez kunit_test_suites(&int_sqrt_test_suite); 64*0fafc9e1SLuis Felipe Hernandez 65*0fafc9e1SLuis Felipe Hernandez MODULE_DESCRIPTION("math.int_sqrt KUnit test suite"); 66*0fafc9e1SLuis Felipe Hernandez MODULE_LICENSE("GPL"); 67