Content merging

Hi
i have two drupal sites they are exactly the same , i use the first one for tests then if the test in contructive i apply the changes on the other site(production site), my question is there a module i can use to directly update contents in the production site after i finished editing the sames contents in the test site, in other words a button if a content is edited in the test site i click on this button and the content is updated in the production site
best regards
thank you