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

(repaint rects
  (rect 24 52 52 300)
  (rect 24 52 100 300)
  (rect 24 52 52 300)
  (rect 0 52 100 300)
  (rect 124 52 52 300)
  (rect 124 52 100 300)
  (rect 124 52 52 300)
  (rect 100 52 100 300)
)