From: David Gow davidgow@google.com
commit 37dc573c0a547e1aed0c9abb480fab797bd3833f upstream.
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/in...
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- lib/list-test.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)
--- a/lib/list-test.c +++ b/lib/list-test.c @@ -234,6 +234,24 @@ static void list_test_list_bulk_move_tai 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; @@ -710,6 +728,7 @@ 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),