Tests invalidation on align-self style change (just overflow). Passes if there is no red.

(repaint rects
  (rect 0 2 200 200)
  (rect 0 2 200 200)
  (rect 0 52 200 200)
  (rect 0 252 200 100)
  (rect 0 2 200 50)
  (rect 0 2 800 14)
)