layer at (0,0) size 800x600
  RenderView {#document} at (0,0) size 800x600
    RenderFlexibleBox {sky} at (0,0) size 800x238
      RenderParagraph {p} at (0,0) size 800x38
        RenderText {#text} at (0,0) size 778x38
          text run at (0,0) width 778: "Test passes if the image below shows nested green, blue and yellow squares with a dotted black"
          text run at (0,19) width 59: "border."
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