layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x600
  RenderBlock {HTML} at (0,0) size 800x600
    RenderBody {BODY} at (8,8) size 784x578
      RenderBlock {P} at (0,0) size 784x19
        RenderText {#text} at (0,0) size 618x19
          text run at (0,0) width 618: "You should see a single 100x100 green square below. If you see any red, then the test has failed."
layer at (10,41) size 100x100
  RenderFlexibleBox (positioned) {DIV} at (10,41) size 100x100 [bgcolor=#FF0000]
    RenderBlock {DIV} at (0,0) size 100x100 [bgcolor=#008000]
