<html>
  <head>
    <script>
      function nestedIframeLoaded() {
        var tf = document.getElementById("testframe");
        var innerf = tf.contentDocument.getElementsByTagName("iframe")[0];
        if (!innerf.contentDocument.documentURI.includes("frame0")) {
          innerf.contentWindow.location.href = "http://mochi.test:8888/tests/docshell/test/navigation/frame0.html";
          return;
        }
        innerf.onload = null;
        innerf.src = "about:blank";
        var d = innerf.contentDocument;
        d.open();
        d.write("test");
        d.close();
        opener.is(window.history.length, 1, "Unexpected history length");
        opener.finishTest();
      }
    </script>
  </head>
  <body>
  <iframe id="testframe" src="file_nested_frames_innerframe.html" onload="frameLoaded()"></iframe>
  <script>
  </script>
  </body>
</html>
