To manually test this, type "hllo" and trigger spell checking. Select a spell checking candidate.

On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".


PASS replacementRange.startOffset is 0
PASS replacementRange.endOffset is 4
PASS replacementRange.startContainer is editable.childNodes[0]
PASS replacementRange.endContainer is editable.childNodes[0]
PASS successfullyParsed is true

TEST COMPLETE
hllo