layer at (0,0) size 800x600
  RenderCanvas 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
      RenderBlock {DIV} at (0,0) size 784x84 [border: (2px solid #FF0000)]
        RenderBlock {DIV} at (14,14) size 756x28
          RenderText {TEXT} at (0,0) size 32x28
            text run at (0,0) width 32: "foo"
        RenderBlock (anonymous) at (14,42) size 756x28
          RenderText {TEXT} at (0,0) size 31x28
            text run at (0,0) width 31: "bar"
selection is RANGE:
start:      position 0 of child 3 {TEXT} of root {DIV}
upstream:   position 0 of child 3 {TEXT} of root {DIV}
downstream: position 0 of child 3 {TEXT} of root {DIV}
end:        position 3 of child 3 {TEXT} of root {DIV}
upstream:   position 3 of child 3 {TEXT} of root {DIV}
downstream: position 4 of child 3 {TEXT} of root {DIV}
