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This patch is a follow-up task from a discussion stemming from point 3 in a recent patch introducing the int_pow kunit test [1] and documentation regarding kunit test style and nomenclature [2]. Colocate all kunit test suites in lib/math/tests/ and follow recommended naming convention for files <suite>_kunit.c and kconfig entries CONFIG_<name>_KUNIT_TEST. Link: https://lore.kernel.org/all/CABVgOS=-vh5TqHFCq_jo=ffq8v_nGgr6JsPnOZag3e6+19ysxQ@mail.gmail.com/ [1] Link: https://docs.kernel.org/dev-tools/kunit/style.html [2] Signed-off-by: Luis Felipe Hernandez <luis.hernandez093@gmail.com> Acked-by: Nicolas Pitre <npitre@baylibre.com> Reviewed-by: David Gow <davidgow@google.com> Reviewed-by: Rae Moar <rmoar@google.com> Link: https://lore.kernel.org/r/20241202075545.3648096-2-davidgow@google.com Signed-off-by: Kees Cook <kees@kernel.org>
57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
// 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_DESCRIPTION("Rational fractions unit test");
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MODULE_LICENSE("GPL v2");
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