1 option/optgroup in menulist are never focusable even with a tabindex
3 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
6 PASS isFocusable("optionA") is false
7 PASS isFocusable("optgroupB") is false
8 PASS isFocusable("optionC") is false
9 PASS isFocusable("optionD") is true
10 PASS successfullyParsed is true