Add a KUnit test for strlen() to verify correctness across different string lengths and memory alignments.
Signed-off-by: Feng Jiang <[email protected]> --- lib/tests/string_kunit.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/lib/tests/string_kunit.c b/lib/tests/string_kunit.c index f9a8e557ba77..88da97e50c8e 100644 --- a/lib/tests/string_kunit.c +++ b/lib/tests/string_kunit.c @@ -17,6 +17,9 @@ #define STRCMP_TEST_EXPECT_LOWER(test, fn, ...) KUNIT_EXPECT_LT(test, fn(__VA_ARGS__), 0) #define STRCMP_TEST_EXPECT_GREATER(test, fn, ...) KUNIT_EXPECT_GT(test, fn(__VA_ARGS__), 0) +#define STRING_TEST_MAX_LEN 128 +#define STRING_TEST_MAX_OFFSET 16 + static void string_test_memset16(struct kunit *test) { unsigned i, j, k; @@ -104,6 +107,28 @@ static void string_test_memset64(struct kunit *test) } } +static void string_test_strlen(struct kunit *test) +{ + char *s; + size_t len, offset; + const size_t buf_size = STRING_TEST_MAX_LEN + STRING_TEST_MAX_OFFSET + 1; + + s = kunit_kzalloc(test, buf_size, GFP_KERNEL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, s); + + memset(s, 'A', buf_size); + s[buf_size - 1] = '\0'; + + for (offset = 0; offset < STRING_TEST_MAX_OFFSET; offset++) { + for (len = 0; len <= STRING_TEST_MAX_LEN; len++) { + s[offset + len] = '\0'; + KUNIT_EXPECT_EQ_MSG(test, strlen(s + offset), len, + "offset:%zu len:%zu", offset, len); + s[offset + len] = 'A'; + } + } +} + static void string_test_strchr(struct kunit *test) { const char *test_string = "abcdefghijkl"; @@ -618,6 +643,7 @@ static struct kunit_case string_test_cases[] = { KUNIT_CASE(string_test_memset16), KUNIT_CASE(string_test_memset32), KUNIT_CASE(string_test_memset64), + KUNIT_CASE(string_test_strlen), KUNIT_CASE(string_test_strchr), KUNIT_CASE(string_test_strnchr), KUNIT_CASE(string_test_strspn), -- 2.25.1
