[PATCH libinput 2/6] test: fix edge scroll timeout test

[Peter Hutterer]

This test is supposed to test for the timeout kicking in on edge scrolling -
if the finger is in the edge for longer than the timeout, we switch to
scrolling without requiring the motion threshold to be met first.

To emulate this, move the finger ever so slightly first to load up the motion
history, then timeout, then move. We expect a bunch of motion events with a
small delta.

Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>
---
 test/touchpad.c | 64 +++++++++++++++++++++++++++++++--------------------------
 1 file changed, 35 insertions(+), 29 deletions(-)

diff --git a/test/touchpad.c b/test/touchpad.c
index ef262f9..8bff5a9 100644
--- a/test/touchpad.c
+++ b/test/touchpad.c
@@ -463,54 +463,60 @@ START_TEST(touchpad_edge_scroll_timeout)
 	struct libinput_event *event;
 	struct libinput_event_pointer *ptrev;
 	double width = 0, height = 0;
-	int y_movement = 30; /* in percent of height */
+	int nevents = 0;
+	double mm; /* one mm in percent of the device */
 
-	/* account for different touchpad heights, let's move 100% on a 15mm
-	   high touchpad, less on anything else. This number is picked at
-	   random, we just want deltas less than 5.
-	   */
-	if (libinput_device_get_size(dev->libinput_device,
-				     &width,
-				     &height) != -1) {
-		y_movement = 100 * 15/height;
-	}
+	ck_assert_int_eq(libinput_device_get_size(dev->libinput_device,
+						  &width,
+						  &height), 0);
+	mm = 100.0/height;
+
+	/* timeout-based scrolling is disabled when software buttons are
+	 * active, so switch to clickfinger. Not all test devices support
+	 * that, hence the extra check. */
+	if (libinput_device_config_click_get_methods(dev->libinput_device) &
+	    LIBINPUT_CONFIG_CLICK_METHOD_CLICKFINGER)
+		litest_enable_clickfinger(dev);
 
 	litest_drain_events(li);
 	litest_enable_edge_scroll(dev);
 
+	/* move 0.5mm, enough to load up the motion history, but less than
+	 * the scroll threshold of 2mm */
 	litest_touch_down(dev, 0, 99, 20);
+	litest_touch_move_to(dev, 0, 99, 20, 99, 20 + mm/2, 8, 0);
 	libinput_dispatch(li);
+	litest_assert_empty_queue(li);
+
 	litest_timeout_edgescroll();
 	libinput_dispatch(li);
 
-	litest_touch_move_to(dev, 0, 99, 20, 99, 20 + y_movement, 100, 10);
+	litest_assert_empty_queue(li);
+
+	/* now move slowly up to the 2mm scroll threshold. we expect events */
+	litest_touch_move_to(dev, 0, 99, 20 + mm/2, 99, 20 + mm * 2, 20, 0);
 	litest_touch_up(dev, 0);
 	libinput_dispatch(li);
 
-	event = libinput_get_event(li);
-	ck_assert_notnull(event);
-
 	litest_wait_for_event_of_type(li, LIBINPUT_EVENT_POINTER_AXIS, -1);
 
-	while (libinput_next_event_type(li) != LIBINPUT_EVENT_NONE) {
-		double axisval;
-		ck_assert_int_eq(libinput_event_get_type(event),
-				 LIBINPUT_EVENT_POINTER_AXIS);
-		ptrev = libinput_event_get_pointer_event(event);
-
-		axisval = libinput_event_pointer_get_axis_value(ptrev,
-				 LIBINPUT_POINTER_AXIS_SCROLL_VERTICAL);
-		ck_assert(axisval > 0.0);
-
-		/* this is to verify we test the right thing, if the value
-		   is greater than scroll.threshold we triggered the wrong
-		   condition */
-		ck_assert(axisval < 5.0);
+	while ((event = libinput_get_event(li))) {
+		double value;
 
+		ptrev = litest_is_axis_event(event,
+					     LIBINPUT_POINTER_AXIS_SCROLL_VERTICAL,
+					     0);
+		value = libinput_event_pointer_get_axis_value(ptrev,
+							      LIBINPUT_POINTER_AXIS_SCROLL_VERTICAL);
+		ck_assert_double_lt(value, 5.0);
 		libinput_event_destroy(event);
-		event = libinput_get_event(li);
+		nevents++;
 	}
 
+	/* we sent 20 events but allow for some to be swallowed by rounding
+	 * errors, the hysteresis, etc. */
+	ck_assert_int_ge(nevents, 10);
+
 	litest_assert_empty_queue(li);
 	libinput_event_destroy(event);
 }
-- 
2.4.3