LayoutTests/svg/custom/textPath-insert-path.svg

<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" onload="runTest()">
  <text>
    <textPath id="theTP" xlink:href="#thePath">PASS</textPath>
  </text>
  <script><![CDATA[
    function runTest() {
      var path = document.createElementNS("http://www.w3.org/2000/svg", "path");
      path.setAttribute("id", "thePath");
      path.setAttribute("d", "M50 50 L 450 50");
      document.rootElement.appendChild(path);
    }
  ]]></script>
</svg>