[PATCH libinput 4/4] test: add accel test for direction change

[Peter Hutterer]

Make sure that if we go in one direction, then change flip over to the other
direction we actually stop going into that direction, and the delta is lower
than whatever the previous delta was (i.e. acceleration resets).

Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>
---
 test/pointer.c | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/test/pointer.c b/test/pointer.c
index 23bf0d7..745af63 100644
--- a/test/pointer.c
+++ b/test/pointer.c
@@ -812,6 +812,48 @@ START_TEST(pointer_accel_defaults_absolute)
 }
 END_TEST
 
+START_TEST(pointer_accel_direction_change)
+{
+	struct litest_device *dev = litest_current_device();
+	struct libinput *li = dev->libinput;
+	struct libinput_event *event;
+	struct libinput_event_pointer *pev;
+	int i;
+	double delta;
+	double max_accel;
+
+	litest_drain_events(li);
+
+	for (i = 0; i < 10; i++) {
+		litest_event(dev, EV_REL, REL_X, -1);
+		litest_event(dev, EV_SYN, SYN_REPORT, 0);
+	}
+	litest_event(dev, EV_REL, REL_X, 1);
+	litest_event(dev, EV_SYN, SYN_REPORT, 0);
+	libinput_dispatch(li);
+
+	litest_wait_for_event_of_type(li,
+				      LIBINPUT_EVENT_POINTER_MOTION,
+				      -1);
+	event = libinput_get_event(li);
+	do {
+		pev = libinput_event_get_pointer_event(event);
+
+		delta = libinput_event_pointer_get_dx(pev);
+		ck_assert(delta <= 0.0);
+		max_accel = delta;
+		libinput_event_destroy(event);
+		event = libinput_get_event(li);
+	} while (libinput_next_event_type(li) != LIBINPUT_EVENT_NONE);
+
+	pev = libinput_event_get_pointer_event(event);
+	delta = libinput_event_pointer_get_dx(pev);
+	ck_assert(delta > 0.0);
+	ck_assert(delta < -max_accel);
+	libinput_event_destroy(event);
+}
+END_TEST
+
 int main (int argc, char **argv) {
 
 	litest_add("pointer:motion", pointer_motion_relative, LITEST_RELATIVE, LITEST_ANY);
@@ -837,6 +879,7 @@ int main (int argc, char **argv) {
 	litest_add("pointer:accel", pointer_accel_defaults, LITEST_RELATIVE, LITEST_ANY);
 	litest_add("pointer:accel", pointer_accel_invalid, LITEST_RELATIVE, LITEST_ANY);
 	litest_add("pointer:accel", pointer_accel_defaults_absolute, LITEST_ABSOLUTE, LITEST_ANY);
+	litest_add("pointer:accel", pointer_accel_direction_change, LITEST_RELATIVE, LITEST_ANY);
 
 	return litest_run(argc, argv);
 }
-- 
2.3.2