tests: add a create_test_surface function

This doesn't attach a buffer to the surface. This is needed for the
next commit, where we have a test case with a surface that doesn't
have a buffer attached.

Signed-off-by: Emilio Pozuelo Monfort <emilio.pozuelo@collabora.co.uk>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Daniel Stone <daniels@collabora.com>

tests/weston-test-client-helper.c

@@ -864,18 +864,13 @@ create_client(void)
 	return client;
 }
 
-struct client *
-create_client_and_test_surface(int x, int y, int width, int height)
+struct surface *
+create_test_surface(struct client *client)
 {
-	struct client *client;
 	struct surface *surface;
-	pixman_color_t color = { 16384, 16384, 16384, 16384 }; /* uint16_t */
-	pixman_image_t *solid;
-
-	client = create_client();
 
-	/* initialize the client surface */
 	surface = xzalloc(sizeof *surface);
+
 	surface->wl_surface =
 		wl_compositor_create_surface(client->wl_compositor);
 	assert(surface->wl_surface);
@@ -883,9 +878,25 @@ create_client_and_test_surface(int x, int y, int width, int height)
 	wl_surface_add_listener(surface->wl_surface, &surface_listener,
 				surface);
 
-	client->surface = surface;
 	wl_surface_set_user_data(surface->wl_surface, surface);
 
+	return surface;
+}
+
+struct client *
+create_client_and_test_surface(int x, int y, int width, int height)
+{
+	struct client *client;
+	struct surface *surface;
+	pixman_color_t color = { 16384, 16384, 16384, 16384 }; /* uint16_t */
+	pixman_image_t *solid;
+
+	client = create_client();
+
+	/* initialize the client surface */
+	surface = create_test_surface(client);
+	client->surface = surface;
+
 	surface->width = width;
 	surface->height = height;
 	surface->buffer = create_shm_buffer_a8r8g8b8(client, width, height);

tests/weston-test-client-helper.h

@@ -155,6 +155,9 @@ struct rectangle {
 struct client *
 create_client(void);
 
+struct surface *
+create_test_surface(struct client *client);
+
 struct client *
 create_client_and_test_surface(int x, int y, int width, int height);