How will you test a keyboard?-simple answer

How will you test a keyboard?

First of all I will go through all requirements.
After that I will check first positive than negative way.
I will give valid strokes (press all keys) ensuring all keys working correct or not.
I will check combination keys are working correct or not.
I will check invalid strokes ex: pressing key "a" and "c" at a time.
I will check functional keys working.