content/base/test/test_bug395915.html

<!DOCTYPE HTML>
<html class="A b">
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=395915
-->
<head>
  <title>Test for Bug 395915</title>
  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=395915">Mozilla Bug 395915</a>
<p id="display"></p>
<div id="content" style="display: none">
  
</div>
<pre id="test">
<script class="testbody" type="text/javascript">

/** Test for Bug 395915 **/
is(document.getElementsByClassName("a").length, 0,
   "Class names are case-sensitive");
is(document.getElementsByClassName("A").length, 1,
   "Have one node of class A");
is(document.getElementsByClassName("A")[0], document.documentElement,
   "Root is class A");

is(document.getElementsByClassName("a b").length, 0,
   "Class names are case-sensitive two");
is(document.getElementsByClassName("A B").length, 0,
   "Class names are case-sensitive three");
is(document.getElementsByClassName("a B").length, 0,
   "Class names are case-sensitive four");
is(document.getElementsByClassName("A b").length, 1,
   "Have one node of class 'A b'");
is(document.getElementsByClassName("A b")[0], document.documentElement,
   "Root is class 'A b'");

</script>
</pre>
</body>
</html>