layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x52
  RenderBlock {HTML} at (0,0) size 800x52
    RenderBody {BODY} at (8,8) size 784x36
      RenderBlock {DIV} at (0,0) size 784x18
        RenderText {#text} at (0,0) size 71x17
          text run at (0,0) width 71: "text before "
        RenderInline {ATTACHMENT} at (0,0) size 0x17
        RenderText {#text} at (71,0) size 55x17
          text run at (71,0) width 55: "text after"
      RenderBlock {DIV} at (0,18) size 784x18
        RenderText {#text} at (0,0) size 161x17
          text run at (0,0) width 161: "Start offset 3 End offset 3"
caret: position 3 of child 2 {#text} of child 1 {DIV} of body