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list: test: Add a test for list_is_head()

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list_is_head() was added recently[1], and didn't have a KUnit test. The
implementation is trivial, so it's not a particularly exciting test, but
it'd be nice to get back to full coverage of the list functions.

[1]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/include/linux/list.h?id=0425473037db40d9e322631f2d4dc6ef51f97e88

Signed-off-by: David Gow <davidgow@google.com>
Acked-by: Daniel Latypov <dlatypov@google.com>
Acked-by: Brendan Higgins <brendanhiggins@google.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
David Gow 2022-02-25 10:52:48 +08:00 committed by Shuah Khan
parent d7fd696c12
commit 37dc573c0a
1 changed files with 19 additions and 0 deletions
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19
lib/list-test.c
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@ -254,6 +254,24 @@ static void list_test_list_bulk_move_tail(struct kunit *test)
KUNIT_EXPECT_EQ(test, i, 2);
}
static void list_test_list_is_head(struct kunit *test)
{
struct list_head a, b, c;
/* Two lists: [a] -> b, [c] */
INIT_LIST_HEAD(&a);
INIT_LIST_HEAD(&c);
list_add_tail(&b, &a);
KUNIT_EXPECT_TRUE_MSG(test, list_is_head(&a, &a),
"Head element of same list");
KUNIT_EXPECT_FALSE_MSG(test, list_is_head(&a, &b),
"Non-head element of same list");
KUNIT_EXPECT_FALSE_MSG(test, list_is_head(&a, &c),
"Head element of different list");
}
static void list_test_list_is_first(struct kunit *test)
{
struct list_head a, b;
@ -731,6 +749,7 @@ static struct kunit_case list_test_cases[] = {
KUNIT_CASE(list_test_list_move),
KUNIT_CASE(list_test_list_move_tail),
KUNIT_CASE(list_test_list_bulk_move_tail),
KUNIT_CASE(list_test_list_is_head),
KUNIT_CASE(list_test_list_is_first),
KUNIT_CASE(list_test_list_is_last),
KUNIT_CASE(list_test_list_empty),