Tests invalidation on justify-self style change. Passes if there is no red.

(repaint rects
  (rect -50 52 150 300)
  (rect -50 52 150 300)
  (rect 0 52 150 300)
  (rect 150 52 50 300)
  (rect -50 52 50 300)
  (rect -50 16 50 336)
  (rect -50 0 50 352)
)