Signed-off-by: Hans de Goede <hdego...@redhat.com>
---
 test/touchpad.c | 78 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)

diff --git a/test/touchpad.c b/test/touchpad.c
index 7350c21..585c1d2 100644
--- a/test/touchpad.c
+++ b/test/touchpad.c
@@ -1072,6 +1072,82 @@ START_TEST(clickpad_topsoftbuttons_move_out_ignore)
 }
 END_TEST
 
+static void
+test_2fg_scroll(struct litest_device *dev, int dx, int dy)
+{
+       litest_touch_down(dev, 0, 47, 50);
+       litest_touch_down(dev, 1, 53, 50);
+
+       litest_touch_move_to(dev, 0, 47, 50, 47 + dx, 50 + dy, 5);
+       litest_touch_move_to(dev, 1, 53, 50, 53 + dx, 50 + dy, 5);
+
+       litest_touch_up(dev, 1);
+       litest_touch_up(dev, 0);
+}
+
+static void
+check_2fg_scroll(struct litest_device *dev, int axis, int dir)
+{
+       struct libinput *li = dev->libinput;
+       struct libinput_event *event, *next_event;
+       struct libinput_event_pointer *ptrev;
+
+       libinput_dispatch(li);
+
+       event = libinput_get_event(li);
+       next_event = libinput_get_event(li);
+       ck_assert(next_event != NULL); /* At least 1 scroll + stop scroll */
+
+       while (event) {
+               ck_assert_int_eq(libinput_event_get_type(event),
+                                LIBINPUT_EVENT_POINTER_AXIS);
+               ptrev = libinput_event_get_pointer_event(event);
+               ck_assert(ptrev != NULL);
+               ck_assert_int_eq(libinput_event_pointer_get_axis(ptrev), axis);
+
+               if (next_event) {
+                       /* Normal scroll event, check dir */
+                       if (dir > 0) {
+                               ck_assert_int_ge(
+                                       
libinput_event_pointer_get_axis_value(ptrev),
+                                       dir);
+                       } else {
+                               ck_assert_int_le(
+                                       
libinput_event_pointer_get_axis_value(ptrev),
+                                       dir);
+                       }
+               } else {
+                       /* Last scroll event, must be 0 */
+                       ck_assert_int_eq(
+                               libinput_event_pointer_get_axis_value(ptrev),
+                               0);
+               }
+               libinput_event_destroy(event);
+               event = next_event;
+               next_event = libinput_get_event(li);
+       }
+}
+
+START_TEST(touchpad_2fg_scroll)
+{
+       struct litest_device *dev = litest_current_device();
+       struct libinput *li = dev->libinput;
+
+       litest_drain_events(li);
+
+       /* Note this mixes in a tiny amount of movement in the wrong direction,
+          which should be ignored */
+       test_2fg_scroll(dev, 1, 40);
+       check_2fg_scroll(dev, LIBINPUT_POINTER_AXIS_SCROLL_VERTICAL, 10);
+       test_2fg_scroll(dev, 1, -40);
+       check_2fg_scroll(dev, LIBINPUT_POINTER_AXIS_SCROLL_VERTICAL, -10);
+       test_2fg_scroll(dev, 40, 1);
+       check_2fg_scroll(dev, LIBINPUT_POINTER_AXIS_SCROLL_HORIZONTAL, 10);
+       test_2fg_scroll(dev, -40, 1);
+       check_2fg_scroll(dev, LIBINPUT_POINTER_AXIS_SCROLL_HORIZONTAL, -10);
+}
+END_TEST
+
 int main(int argc, char **argv) {
 
        litest_add("touchpad:motion", touchpad_1fg_motion, LITEST_TOUCHPAD, 
LITEST_ANY);
@@ -1113,5 +1189,7 @@ int main(int argc, char **argv) {
        litest_add("touchpad:topsoftbuttons", clickpad_topsoftbuttons_middle, 
LITEST_TOPBUTTONPAD, LITEST_ANY);
        litest_add("touchpad:topsoftbuttons", 
clickpad_topsoftbuttons_move_out_ignore, LITEST_TOPBUTTONPAD, LITEST_ANY);
 
+       litest_add("touchpad:scroll", touchpad_2fg_scroll, LITEST_TOUCHPAD, 
LITEST_SINGLE_TOUCH);
+
        return litest_run(argc, argv);
 }
-- 
2.0.0

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