WAI-ARIA tests for invalidly nested heading elements

Equivalent ARIA patterns tested in /html-aam/heading/invalid-nesting.html.

Accessible names and roles

Invalid div[role=heading][aria-level=2]
Invalid div[role=heading][aria-level=3]
Invalid div[role=heading][aria-level=6]
Chocolate
Peanut butter

ARIA heading impostors

Biscuits Gravy