We have a complete set of automated tests run on a daily basis which we use to check all the components function correctly and have not regressed in any way when we make a release.
These tests when viewed as a page, can also be very useful as documentation showing you a complete and comphrensive list of features each component posesses.
This link will take you to the actual page we use for automated testing. Each button leads one to the automated page we use for regression testing.