diff mbox series

[v4,3/3] list: test: Add a test for list_entry_is_head()

Message ID 20220225025247.1888244-3-davidgow@google.com (mailing list archive)
State Accepted
Commit 5debe5bfa02c4c8922bd2d0f82c9c3a70bec8944
Headers show
Series [v4,1/3] list: test: Add test for list_del_init_careful() | expand

Commit Message

David Gow Feb. 25, 2022, 2:52 a.m. UTC 
The list_entry_is_head() macro was added[1] after the list KUnit tests,
so wasn't tested. Add a new KUnit test to complete the set.

[1]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e130816164e244b692921de49771eeb28205152d

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>
---

Changes since v3:
https://lore.kernel.org/lkml/20220209052813.854014-3-davidgow@google.com/
- Add Reviewed-by tags.

Changes since v2:
https://lore.kernel.org/linux-kselftest/20220208040122.695258-3-davidgow@google.com/
- Use the _MSG variants of the assert macros, as suggested by Daniel
  Latypov.

Changes since v1:
https://lore.kernel.org/linux-kselftest/20220205061539.273330-3-davidgow@google.com/
- Rework the test entirely to better match the improved list_is_head()
  test.

---
 lib/list-test.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
diff mbox series

Patch

diff --git a/lib/list-test.c b/lib/list-test.c
index 3870ebfd84aa..035ef6597640 100644
--- a/lib/list-test.c
+++ b/lib/list-test.c
@@ -549,6 +549,26 @@  static void list_test_list_entry(struct kunit *test)
 				struct list_test_struct, list));
 }
 
+static void list_test_list_entry_is_head(struct kunit *test)
+{
+	struct list_test_struct test_struct1, test_struct2, test_struct3;
+
+	INIT_LIST_HEAD(&test_struct1.list);
+	INIT_LIST_HEAD(&test_struct3.list);
+
+	list_add_tail(&test_struct2.list, &test_struct1.list);
+
+	KUNIT_EXPECT_TRUE_MSG(test,
+		list_entry_is_head((&test_struct1), &test_struct1.list, list),
+		"Head element of same list");
+	KUNIT_EXPECT_FALSE_MSG(test,
+		list_entry_is_head((&test_struct2), &test_struct1.list, list),
+		"Non-head element of same list");
+	KUNIT_EXPECT_FALSE_MSG(test,
+		list_entry_is_head((&test_struct3), &test_struct1.list, list),
+		"Head element of different list");
+}
+
 static void list_test_list_first_entry(struct kunit *test)
 {
 	struct list_test_struct test_struct1, test_struct2;
@@ -764,6 +784,7 @@  static struct kunit_case list_test_cases[] = {
 	KUNIT_CASE(list_test_list_splice_init),
 	KUNIT_CASE(list_test_list_splice_tail_init),
 	KUNIT_CASE(list_test_list_entry),
+	KUNIT_CASE(list_test_list_entry_is_head),
 	KUNIT_CASE(list_test_list_first_entry),
 	KUNIT_CASE(list_test_list_last_entry),
 	KUNIT_CASE(list_test_list_first_entry_or_null),