test: add helper function for checking for a specific event type

In a few tests we care about that a specific set of events are in the queue
but not about the details of the events (usually checked elsewhere). Instead
of manual loops, provide a helper function that also checks that there is at
least one of those events in the queue.

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

test/litest.c

@@ -1223,6 +1223,27 @@ litest_assert_scroll(struct libinput *li,
 	}
 }
 
+void
+litest_assert_only_typed_events(struct libinput *li,
+				enum libinput_event_type type)
+{
+	struct libinput_event *event;
+
+	assert(type != LIBINPUT_EVENT_NONE);
+
+	libinput_dispatch(li);
+	event = libinput_get_event(li);
+	ck_assert_notnull(event);
+
+	while (event) {
+		ck_assert_int_eq(libinput_event_get_type(event),
+				 type);
+		libinput_event_destroy(event);
+		libinput_dispatch(li);
+		event = libinput_get_event(li);
+	}
+}
+
 void
 litest_timeout_tap(void)
 {

test/litest.h

@@ -162,6 +162,8 @@ void litest_assert_button_event(struct libinput *li,
 void litest_assert_scroll(struct libinput *li,
 			  enum libinput_pointer_axis axis,
 			  int minimum_movement);
+void litest_assert_only_typed_events(struct libinput *li,
+				     enum libinput_event_type type);
 
 struct libevdev_uinput * litest_create_uinput_device(const char *name,
 						     struct input_id *id,