snav-iframe-recursive-offset-parent.html

<table style="text-align: top;"  border="0" cellpadding="3px" cellspacing="3px">
  <tr>
    <td valign="top" width="10%">
      <a id="start" href="">Link</a><br>
    </td>
    <td valign="top">
      <iframe id="frameA" width="50%" height="100px" frameborder="1" srcdoc="
      <body id='frameAbody'>
        <a id='b' href=''>b</a>
        <a id='c' href=''>c</a>
        <a id='d' href=''>d</a>
      </body>
      "></iframe><br>
    </td>
  </tr>
</table>

<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="resources/snav-testharness.js"></script>
<script>
  var resultMap = [
    ["Right", "frameA,frameAbody"],
    ["Right", "frameA,b"],
    ["Right", "frameA,c"],
    ["Right", "frameA,d"],
    ["Left", "frameA,c"],
    ["Left", "frameA,b"],
    ["Left", "start"],
  ];
  // Start at a known place.
  document.getElementById("start").focus();
  snav.assertFocusMoves(resultMap);
</script>

chromium/third_party/blink/web_tests/fast/spatial-navigation/snav-iframe-recursive-offset-parent.html