Keyboard Behavior for Widgets

Keyboard testing is difficult.  Chapter 11 of the ARIA best practice, 
http://www.w3.org/TR/wai-aria-practices/#aria_ex, gives design patterns 
for common widgets.  The keyboard behavior is easy to read, unlike other 
ARIA docs, but itis not at tutorial level.  I think some kind of 
keyboard testing sould be in the turorials, and this behavior would be 
the expected behavior.  Take a look, it's not bad reading.

Wayne