layout/style/test/test_bug524175.html

<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=524175
-->
<head>
  <title>Test for Bug 524175</title>
  <script type="application/javascript" src="/MochiKit/packed.js"></script>
  <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
  <style>
    span::before ::before {}
  </style>
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=524175">Mozilla Bug 524175</a>
<p id="display"></p>
<div id="content" style="display: none">
  
</div>
<pre id="test">
<script type="application/javascript">

/** Test for Bug 524175 **/
is(document.styleSheets[1].cssRules.length, 0, "Shouldn't have parsed that rule");
</script>
</pre>
</body>
</html>