Added a few more tests for radio buttons, since the implementation was dependent on the order of the checked button, and was also affected by having more than two buttons.
Added a few more tests for radio buttons, since the implementation was dependent on the order of the checked button, and was also affected by having more than two buttons.

Patternslib/Patterns-archive,Patternslib/Patterns-archive,Patternslib/Patterns-archive