layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x72
  RenderBlock {test} at (0,0) size 800x72
    RenderBlock {p} at (0,16) size 800x40 [bgcolor=#00FF00]
      RenderText {#text} at (0,0) size 289x19
        text run at (0,0) width 289: "This paragraph should have a green background"
      RenderBR {br} at (289,0) size 0x19
      RenderText {#text} at (0,20) size 249x19
        text run at (0,20) width 249: "because its title attribute begins with \"foo\""