Like most good developers I have a separate testing environment for my web app. For example, I have www.test.example.com which is the testing site and the production site is www.example.com.
I have set my Base Domain to example.com but how do I set the connect URL so that it goes to my test site when I login from the test site? Do I need to create a separate app for each subdomain? Is it possible to set the URLs dynamically using Admin.setAppProperties?
List of Application Properties
I have developed a number of facebook applications (you can go to my website through my profile) but what i do is create a folder in my site not create a sub-domain like you said. Then i create settings for my folder on facebook application settings. This is the faster and easier way to do it.
For example I create a folder like www.example.com/fbtest_app/. Once everything is fine, i move all stuff and update the settings for the final folder.
Depending on how you're doing the authorization flow, you can pass a next URL for the old auth flows, or redirect_uri for the OAuth2 flow which will allow you to specify an arbitrary URL under the base domain you've set.