test: add a note to the touch double-down event

libevdev filters the ABS_MT_TRACKING_ID event for a double-touch down like
this so we never see this in libinput. We see an error message from libevdev
but otherwise this test is a false negative.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

diff --git a/test/touch.c b/test/touch.c
index eb9f4cb..a5eb553 100644 (file)
--- a/test/touch.c
+++ b/test/touch.c
@@ -182,6 +182,9 @@ START_TEST(touch_double_touch_down_up)
        dev = litest_current_device();
        libinput = dev->libinput;
 
+       /* note: this test is a false negative, libevdev will filter
+        * tracking IDs re-used in the same slot. */
+
        litest_touch_down(dev, 0, 0, 0);
        litest_touch_down(dev, 0, 0, 0);
        litest_touch_up(dev, 0);