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