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layer at (0,0) size 800x100
  RenderBlock {HTML} at (0,0) size 800x100
    RenderBody {BODY} at (8,14) size 784x72
      RenderBlock {P} at (0,0) size 784x72 [bgcolor=#FFFFFF]
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          text run at (19,19) width 480: "This paragraph should have white background and a green thick solid "
          text run at (499,19) width 259: "border because it carries both classes"
          text run at (19,36) width 64: "t1 and t2"
