LayoutTests/mathml/mathml-unknown.xhtml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC
    "-//W3C//DTD XHTML 1.1 plus MathML 2.0 plus SVG 1.1//EN"
    "http://www.w3.org/2002/04/xhtml-math-svg/xhtml-math-svg.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
  <title>Unknown MathML elements</title>
  <script>
    if (window.testRunner)
      testRunner.dumpAsText();
  </script>
</head>
<body>
  <p>This test passes if the unknown MathML elements do not create any renderer.</p>
  <p>Content MathML element: <math xmlns="http://www.w3.org/1998/Math/MathML"><csymbol><mtext>FAIL</mtext></csymbol></math></p>
  <p>Non-standard MathML element: <non-standard xmlns="http://www.w3.org/1998/Math/MathML"><mtext>FAIL</mtext></non-standard></p>
</body>
</html>