layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x33
  RenderBlock {HTML} at (0,0) size 800x33
    RenderBody {BODY} at (8,8) size 784x17
      RenderBlock {DIV} at (0,0) size 784x17
        RenderText {#text} at (0,0) size 672x17
          text run at (0,0) width 672: "[~=] attribute selector looking for empty string in empty attribute (the text should not have red background)"