2 Checks that KeyboardEvent.location is DOM_KEY_LOCATION_STANDARD for NumLock key.
4 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
7 PASS lastKeyboardEvent.type is "keydown"
8 PASS lastKeyboardEvent.keyCode is VKEY_NUMLOCK
9 PASS lastKeyboardEvent.location is KeyboardEvent.DOM_KEY_LOCATION_STANDARD
10 PASS successfullyParsed is true