layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x68
  RenderBlock {test} at (0,0) size 800x68
    RenderBlock {p} at (0,16) size 800x36 [bgcolor=#00FF00]
      RenderText {#text} at (0,0) size 304x17
        text run at (0,0) width 304: "This paragraph should have a green background"
      RenderBR {br} at (304,0) size 0x17
      RenderText {#text} at (0,18) size 266x17
        text run at (0,18) width 266: "because its title attribute begins with \"foo\""