layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x48
  RenderBlock {test} at (0,0) size 800x48
    RenderBlock {p} at (0,16) size 800x16 [bgcolor=#00FF00]
      RenderText {#text} at (0,0) size 272x16
        text run at (0,0) width 272: "This line should have a green background."