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authorDavid Gow <davidgow@google.com>2022-02-25 10:52:48 +0800
committerShuah Khan <skhan@linuxfoundation.org>2022-02-25 08:38:55 -0700
commit37dc573c0a547e1aed0c9abb480fab797bd3833f (patch)
tree6cfa68eedab40792a8c70184444b8a381ac891f3 /lib/list-test.c
parentd7fd696c12605b1666e9a2051e2ac896af103bfe (diff)
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list: test: Add a test for list_is_head()
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>
Diffstat (limited to 'lib/list-test.c')
-rw-r--r--lib/list-test.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/lib/list-test.c b/lib/list-test.c
index 302b7382bff4..3870ebfd84aa 100644
--- a/lib/list-test.c
+++ b/lib/list-test.c
@@ -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),