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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758// 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_DESCRIPTION("Rational fractions unit test");MODULE_LICENSE("GPL v2");