This test checks that changing focus via script on keyboard event handler matches :focus-visible.

Type any letter with the keyboard without having done anything before.
If the element that says "Focused" has a red background, then the test result is FAILURE. If the element has a green outline, then the test result is SUCCESS.
Focused.

PASS ":focus-visible" should be a valid selector
PASS Focus via script on keyboard event handler matches ':focus-visible'