| 1 | |
| 2 |
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| 3 | #include <kunit/test.h>
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| 4 | #include <linux/gcd.h>
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| 5 | #include <linux/limits.h>
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| 6 |
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| 7 | struct test_case_params {
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| 8 | unsigned long val1;
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| 9 | unsigned long val2;
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| 10 | unsigned long expected_result;
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| 11 | const char *name;
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| 12 | };
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| 13 |
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| 14 | static const struct test_case_params params[] = {
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| 15 | { 48, 18, 6, "GCD of 48 and 18" },
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| 16 | { 18, 48, 6, "GCD of 18 and 48" },
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| 17 | { 56, 98, 14, "GCD of 56 and 98" },
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| 18 | { 17, 13, 1, "Coprime numbers" },
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| 19 | { 101, 103, 1, "Coprime numbers" },
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| 20 | { 270, 192, 6, "GCD of 270 and 192" },
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| 21 | { 0, 5, 5, "GCD with zero" },
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| 22 | { 7, 0, 7, "GCD with zero reversed" },
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| 23 | { 36, 36, 36, "GCD of identical numbers" },
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| 24 | { ULONG_MAX, 1, 1, "GCD of max ulong and 1" },
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| 25 | { ULONG_MAX, ULONG_MAX, ULONG_MAX, "GCD of max ulong values" },
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| 26 | };
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| 27 |
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| 28 | static void get_desc(const struct test_case_params *tc, char *desc)
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| 29 | {
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| 30 | strscpy(desc, tc->name, KUNIT_PARAM_DESC_SIZE);
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| 31 | }
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| 32 |
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| 33 | KUNIT_ARRAY_PARAM(gcd, params, get_desc);
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| 34 |
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| 35 | static void gcd_test(struct kunit *test)
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| 36 | {
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| 37 | const struct test_case_params *tc = (const struct test_case_params *)test->param_value;
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| 38 |
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| 39 | KUNIT_EXPECT_EQ(test, tc->expected_result, gcd(tc->val1, tc->val2));
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| 40 | }
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| 41 |
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| 42 | static struct kunit_case math_gcd_test_cases[] = {
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| 43 | KUNIT_CASE_PARAM(gcd_test, gcd_gen_params),
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| 44 | {}
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| 45 | };
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| 46 |
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| 47 | static struct kunit_suite gcd_test_suite = {
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| 48 | .name = "math-gcd",
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| 49 | .test_cases = math_gcd_test_cases,
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| 50 | };
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| 51 |
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| 52 | kunit_test_suite(gcd_test_suite);
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| 53 |
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| 54 | MODULE_LICENSE("GPL");
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| 55 | MODULE_DESCRIPTION("math.gcd KUnit test suite");
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| 56 | MODULE_AUTHOR("Yu-Chun Lin <[email protected]>");
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