tests/elm: add wrapper for forcing manual render in tests

this can be useful when a test needs to immediately verify whether a render
is occurring

Reviewed-by: Stefan Schmidt <stefan@datenfreihafen.org>
Differential Revision: https://phab.enlightenment.org/D11630

src/tests/elementary/suite_helpers.c

@@ -821,3 +821,9 @@ write_key_sequence(Eo *obj, const char *seqence)
        ecore_main_loop_iterate();
     }
 }
+
+void
+force_render(Eo *win)
+{
+   _win_manual_render(win, NULL);
+}

src/tests/elementary/suite_helpers.h

@@ -46,7 +46,7 @@ void event_callback_single_call_int_data(void *data, Evas_Object *obj EINA_UNUSE
 void event_callback_that_quits_the_main_loop_when_called();
 void event_callback_that_increments_an_int_when_called(void *data, Evas_Object *obj, void *event_info);
 
-
+void force_render(Eo *win);
 
 #define assert_object_size_eq(obj, width, height) \
 do \