tests: Add test for seat destruction and creation

Add a test to check that we can destroy and create the test seat. Since
after test seat destruction the test client releases any associated
input resources, this test also checks that libweston properly handles
release requests for inert input resources.

Signed-off-by: Alexandros Frantzis <alexandros.frantzis@collabora.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>

tests/devices-test.c

@@ -322,3 +322,25 @@ TEST(seats_have_names)
 		assert(input->seat_name);
 	}
 }
+
+TEST(seat_destroy_and_recreate)
+{
+	struct client *cl = create_client_and_test_surface(100, 100, 100, 100);
+
+	weston_test_device_release(cl->test->weston_test, "seat");
+	/* Roundtrip to receive and handle the seat global removal event */
+	client_roundtrip(cl);
+
+	assert(!cl->input);
+
+	weston_test_device_add(cl->test->weston_test, "seat");
+	/* First roundtrip to send request and receive new seat global */
+	client_roundtrip(cl);
+	/* Second roundtrip to handle seat events and set up input devices */
+	client_roundtrip(cl);
+
+	assert(cl->input);
+	assert(cl->input->pointer);
+	assert(cl->input->keyboard);
+	assert(cl->input->touch);
+}