autosave: add feature test

config/environments/test.rb

@@ -53,4 +53,9 @@ Rails.application.configure do
 
   # Raises error for missing translations
   # config.action_view.raise_on_missing_translations = true
+
+  config.ds_autosave = {
+    debounce_delay: 500,
+    status_visible_duration: 500
+  }
 end