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 784x584
      RenderText {#text} at (0,0) size 29x19
        text run at (0,0) width 29: "Foo "
      RenderText {#text} at (29,0) size 70x19
        text run at (29,0) width 70: "Hello world"
