Tests that we do not crash when scrolling after a paused animated GIF's CachedImage gets destroyed.

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


Initially outside the viewport
PASS internals.isImageAnimating(image) became false
Scrolling animation into view
PASS internals.isImageAnimating(image) became true
Scrolling animation out of view
PASS internals.isImageAnimating(image) became false
Scrolling back down after image removal
PASS successfullyParsed is true

TEST COMPLETE