layer at (0,0) size 800x600
  LayoutView at (0,0) size 800x600
layer at (0,0) size 800x600
  LayoutBlockFlow {HTML} at (0,0) size 800x600
    LayoutBlockFlow {BODY} at (8,8) size 784x566
      LayoutBlockFlow {PRE} at (0,0) size 784x58
        LayoutText {#text} at (0,0) size 240x58
          text run at (0,0) width 240: "This is a test."
          text run at (240,0) width 0: " "
          text run at (0,29) width 224: "Big font size?"
          text run at (224,29) width 0: " "