f the
  root element.

  This test does *not* verify if the 'writing-mode' value of
  the body element propagates to the root element.
  -->

  <script src="/resources/testharness.js"></script>

  <script src="/resources/testharnessreport.js"></script>

  <style>
  html
    {
      direction: rtl;
      writing-mode: vertical-lr;
    }

  body
    {
      direction: ltr;
      writing-mode: vertical-rl;
    }
  </style>

  <script>
  function startTesting()
  {

    test(function()
      {

      assert_equ