Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1// SPDX-License-Identifier: GPL-2.0-only
2#include <kunit/test.h>
3#include <linux/int_log.h>
4
5struct test_case_params {
6 u32 value;
7 unsigned int expected_result;
8 const char *name;
9};
10
11
12/* The expected result takes into account the log error */
13static const struct test_case_params intlog2_params[] = {
14 {0, 0, "Log base 2 of 0"},
15 {1, 0, "Log base 2 of 1"},
16 {2, 16777216, "Log base 2 of 2"},
17 {3, 26591232, "Log base 2 of 3"},
18 {4, 33554432, "Log base 2 of 4"},
19 {8, 50331648, "Log base 2 of 8"},
20 {16, 67108864, "Log base 2 of 16"},
21 {32, 83886080, "Log base 2 of 32"},
22 {U32_MAX, 536870911, "Log base 2 of MAX"},
23};
24
25static const struct test_case_params intlog10_params[] = {
26 {0, 0, "Log base 10 of 0"},
27 {1, 0, "Log base 10 of 1"},
28 {6, 13055203, "Log base 10 of 6"},
29 {10, 16777225, "Log base 10 of 10"},
30 {100, 33554450, "Log base 10 of 100"},
31 {1000, 50331675, "Log base 10 of 1000"},
32 {10000, 67108862, "Log base 10 of 10000"},
33 {U32_MAX, 161614247, "Log base 10 of MAX"}
34};
35
36static void get_desc(const struct test_case_params *tc, char *desc)
37{
38 strscpy(desc, tc->name, KUNIT_PARAM_DESC_SIZE);
39}
40
41
42KUNIT_ARRAY_PARAM(intlog2, intlog2_params, get_desc);
43
44static void intlog2_test(struct kunit *test)
45{
46 const struct test_case_params *tc = (const struct test_case_params *)test->param_value;
47
48 KUNIT_EXPECT_EQ(test, tc->expected_result, intlog2(tc->value));
49}
50
51KUNIT_ARRAY_PARAM(intlog10, intlog10_params, get_desc);
52
53static void intlog10_test(struct kunit *test)
54{
55 const struct test_case_params *tc = (const struct test_case_params *)test->param_value;
56
57 KUNIT_EXPECT_EQ(test, tc->expected_result, intlog10(tc->value));
58}
59
60static struct kunit_case math_int_log_test_cases[] = {
61 KUNIT_CASE_PARAM(intlog2_test, intlog2_gen_params),
62 KUNIT_CASE_PARAM(intlog10_test, intlog10_gen_params),
63 {}
64};
65
66static struct kunit_suite int_log_test_suite = {
67 .name = "math-int_log",
68 .test_cases = math_int_log_test_cases,
69};
70
71kunit_test_suites(&int_log_test_suite);
72
73MODULE_DESCRIPTION("math.int_log KUnit test suite");
74MODULE_LICENSE("GPL");