[PATCH] selftests/input: add tests for the EVIOCSCLOCKID ioctl

[Dana Elfassy]

This patch introduces tests for the EVIOCSCLOCKID ioctl, for full
coverage of the different clkids

Signed-off-by: Dana Elfassy <dangel101@xxxxxxxxx>
---
This patch depends on '[v3] selftests/input: Introduce basic tests for evdev ioctls' [1] sent to the ML.
[1] https://patchwork.kernel.org/project/linux-input/patch/20230607153214.15933-1-eballetbo@xxxxxxxxxx/

 tools/testing/selftests/input/evioc-test.c | 32 ++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/tools/testing/selftests/input/evioc-test.c b/tools/testing/selftests/input/evioc-test.c
index ad7b93fe39cf..81d5336d93ac 100644
--- a/tools/testing/selftests/input/evioc-test.c
+++ b/tools/testing/selftests/input/evioc-test.c
@@ -234,4 +234,36 @@ TEST(eviocsrep_set_repeat_settings)
 	selftest_uinput_destroy(uidev);
 }
 
+TEST(eviocsclockid_set_clockid)
+{
+	struct selftest_uinput *uidev;
+	int clkid = 0;
+	int rc;
+
+	rc = selftest_uinput_create_device(&uidev, -1);
+	ASSERT_EQ(0, rc);
+	ASSERT_NE(NULL, uidev);
+
+	// case CLOCK_REALTIME
+	rc = ioctl(uidev->evdev_fd, EVIOCSCLOCKID, &clkid);
+	ASSERT_EQ(0, rc);
+
+	// case CLOCK_MONOTONIC
+	clkid = 1;
+	rc = ioctl(uidev->evdev_fd, EVIOCSCLOCKID, &clkid);
+	ASSERT_EQ(0, rc);
+
+	// case CLOCK_BOOTTIME
+	clkid = 7;
+	rc = ioctl(uidev->evdev_fd, EVIOCSCLOCKID, &clkid);
+	ASSERT_EQ(0, rc);
+
+	// case default
+	clkid = -1;
+	rc = ioctl(uidev->evdev_fd, EVIOCSCLOCKID, &clkid);
+	ASSERT_EQ(-1, rc);
+
+	selftest_uinput_destroy(uidev);
+}
+
 TEST_HARNESS_MAIN
-- 
2.41.0