layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x34
  RenderBlock {HTML} at (0,0) size 800x34
    RenderBody {BODY} at (8,8) size 784x18
      RenderBlock {DIV} at (0,0) size 784x18
        RenderText {#text} at (0,0) size 672x18
          text run at (0,0) width 672: "[~=] attribute selector looking for empty string in empty attribute (the text should not have red background)"