tests: Support setting the test client input dynamically

The current test client code waits for all wl_seat globals to arrive
before checking them and deciding which one is the test seat global to
use for the input object. Test code that needs to add/remove test seats
would have to call the client_set_input() function for any seat changes
to take effect. Although we could allow this by making
client_set_input() public, we would be exposing unecessary
implementation details.

This commit applies any seat changes immediately upon arrival of the
seat name, freeing test code from needing to call extra functions like
client_set_input(). To achieve this the call to input_data_devices() is
moved from client_set_input() to the seat name event handler.

This commit also moves the check that all seats have names to an
explicit test. To support this test, inputs corresponding to non-test
seats are not destroyed (unless their seat global is removed), as
was previously the case.

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

tests/devices-test.c

@@ -310,3 +310,13 @@ TEST(get_device_after_destroy_multiple)
 		get_device_after_destroy();
 	}
 }
+
+TEST(seats_have_names)
+{
+	struct client *cl = create_client_and_test_surface(100, 100, 100, 100);
+	struct input *input;
+
+	wl_list_for_each(input, &cl->inputs, link) {
+		assert(input->seat_name);
+	}
+}

tests/weston-test-client-helper.c

@@ -635,6 +635,15 @@ seat_handle_name(void *data, struct wl_seat *seat, const char *name)
 	input->seat_name = strdup(name);
 	assert(input->seat_name && "No memory");
 
+	/* We only update the devices and set client input for the test seat */
+	if (strcmp(name, "test-seat") == 0) {
+		assert(!input->client->input &&
+		       "Multiple test seats detected!");
+
+		input_update_devices(input);
+		input->client->input = input;
+	}
+
 	fprintf(stderr, "test-client: got seat %p name: \'%s\'\n",
 		input, name);
 }
@@ -726,6 +735,7 @@ handle_global(void *data, struct wl_registry *registry,
 					 &wl_compositor_interface, version);
 	} else if (strcmp(interface, "wl_seat") == 0) {
 		input = xzalloc(sizeof *input);
+		input->client = client;
 		input->global_name = global->name;
 		input->wl_seat =
 			wl_registry_bind(registry, id,
@@ -882,26 +892,6 @@ log_handler(const char *fmt, va_list args)
 	vfprintf(stderr, fmt, args);
 }
 
-/* find the test-seat and set it in client.
- * Destroy other inputs */
-static void
-client_set_input(struct client *cl)
-{
-	struct input *inp, *inptmp;
-	wl_list_for_each_safe(inp, inptmp, &cl->inputs, link) {
-		assert(inp->seat_name && "BUG: input with no name");
-		if (strcmp(inp->seat_name, "test-seat") == 0) {
-			cl->input = inp;
-			input_update_devices(inp);
-		} else {
-			input_destroy(inp);
-		}
-	}
-
-	/* we keep only one input */
-	assert(wl_list_length(&cl->inputs) == 1);
-}
-
 struct client *
 create_client(void)
 {
@@ -927,9 +917,6 @@ create_client(void)
 	 * events */
 	client_roundtrip(client);
 
-	/* find the right input for us */
-	client_set_input(client);
-
 	/* must have WL_SHM_FORMAT_ARGB32 */
 	assert(client->has_argb);
 

tests/weston-test-client-helper.h

@@ -74,6 +74,7 @@ struct test {
 };
 
 struct input {
+	struct client *client;
 	uint32_t global_name;
 	struct wl_seat *wl_seat;
 	struct pointer *pointer;