LayoutTests/svg/animations/unsupported-animate-element-attributes.svg

<svg width="400" height="400"
    xmlns="http://www.w3.org/2000/svg" 
    xmlns:xlink="http://www.w3.org/1999/xlink">
  <defs>
    <path id="MyPath" d="M 20 20 L 150 20"/>
  </defs>

  <text>
    <textPath xlink:href="#MyPath">
      <animate attributeName="x"/>
      PASS.
    </textPath>
  </text>
</svg>