<!doctype html>
<html>
 <head>
  <title>document.getElementsByClassName(array): "b a"</title>
  <script src="../resources/common.js"></script>
 </head>
 <body class="a b">
  <p id="r">FAIL (script did not run)</p>
  <script> t(document.getElementsByClassName(["b a"]), [document.body]) </script>
 </body>
</html>