This tests that font features are able to be turned on and off as desired. It uses a special font designed specifically for this purpose. The test passes if you see a sequence of alternating check marks and X below.

BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA

BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA BBAA