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84ec093f55
This commit introduces KUnit tests for the intlog2 and intlog10 functions, which compute logarithms in base 2 and base 10, respectively. The tests cover a range of inputs to ensure the correctness of these functions across common and edge cases. Signed-off-by: Bruno Sobreira França <brunofrancadevsec@gmail.com> Reviewed-by: David Gow <davidgow@google.com> Reviewed-by: Rae Moar <rmoar@google.com> Link: https://lore.kernel.org/r/20241202075545.3648096-3-davidgow@google.com Signed-off-by: Kees Cook <kees@kernel.org>
74 lines
2 KiB
C
74 lines
2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#include <kunit/test.h>
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#include <linux/int_log.h>
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struct test_case_params {
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u32 value;
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unsigned int expected_result;
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const char *name;
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};
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/* The expected result takes into account the log error */
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static const struct test_case_params intlog2_params[] = {
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{0, 0, "Log base 2 of 0"},
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{1, 0, "Log base 2 of 1"},
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{2, 16777216, "Log base 2 of 2"},
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{3, 26591232, "Log base 2 of 3"},
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{4, 33554432, "Log base 2 of 4"},
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{8, 50331648, "Log base 2 of 8"},
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{16, 67108864, "Log base 2 of 16"},
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{32, 83886080, "Log base 2 of 32"},
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{U32_MAX, 536870911, "Log base 2 of MAX"},
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};
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static const struct test_case_params intlog10_params[] = {
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{0, 0, "Log base 10 of 0"},
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{1, 0, "Log base 10 of 1"},
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{6, 13055203, "Log base 10 of 6"},
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{10, 16777225, "Log base 10 of 10"},
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{100, 33554450, "Log base 10 of 100"},
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{1000, 50331675, "Log base 10 of 1000"},
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{10000, 67108862, "Log base 10 of 10000"},
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{U32_MAX, 161614247, "Log base 10 of MAX"}
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};
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static void get_desc(const struct test_case_params *tc, char *desc)
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{
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strscpy(desc, tc->name, KUNIT_PARAM_DESC_SIZE);
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}
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KUNIT_ARRAY_PARAM(intlog2, intlog2_params, get_desc);
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static void intlog2_test(struct kunit *test)
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{
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const struct test_case_params *tc = (const struct test_case_params *)test->param_value;
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KUNIT_EXPECT_EQ(test, tc->expected_result, intlog2(tc->value));
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}
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KUNIT_ARRAY_PARAM(intlog10, intlog10_params, get_desc);
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static void intlog10_test(struct kunit *test)
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{
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const struct test_case_params *tc = (const struct test_case_params *)test->param_value;
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KUNIT_EXPECT_EQ(test, tc->expected_result, intlog10(tc->value));
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}
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static struct kunit_case math_int_log_test_cases[] = {
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KUNIT_CASE_PARAM(intlog2_test, intlog2_gen_params),
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KUNIT_CASE_PARAM(intlog10_test, intlog10_gen_params),
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{}
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};
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static struct kunit_suite int_log_test_suite = {
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.name = "math-int_log",
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.test_cases = math_int_log_test_cases,
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};
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kunit_test_suites(&int_log_test_suite);
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MODULE_DESCRIPTION("math.int_log KUnit test suite");
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MODULE_LICENSE("GPL");
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