layer at (0,0) size 800x600
  LayoutView at (0,0) size 800x600
layer at (0,0) size 800x20
  LayoutBlockFlow {test} at (0,0) size 800x20 [color=#008000]
    LayoutText {#text} at (0,0) size 128x19
      text run at (0,0) width 128: "This should be green."