layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x20
  RenderBlock {test} at (0,0) size 800x20
    RenderBlock {address} at (0,0) size 800x16 [bgcolor=#00FF00]
    RenderBlock {div} at (0,0) size 800x20
      RenderText {#text} at (0,0) size 272x19
        text run at (0,0) width 272: "This line should have a green background."