Write (functional) tests for the module

I created a functional (basic) test for testing the google calendar service configuration, this could be a good start, I'd like to write tests for the calendar entity creation/edit/deletion in the near future, but I believe this is a good start and can be reviewed now:

I'll move this to "Fixed" for now, I believe these functional tests will do just fine for now, if anyone has more suggestions of other tests that can/need to be implemented, please let me know, I plan to write another batch of issues in the next release.

Thanks !

Automatically closed - issue fixed for 2 weeks with no activity.