<html xmlns="http://www.w3.org/1999/xhtml">
 <title>Simple generated content test</title>
 <style>
  body:before{
   display:block;
   content:"This line should have a green background.";
   color:#000;
   background:lime;
  }
 </style>
 <body>
  <p>This test only makes sense if you pass 002.</p>
  <p><strong>If the page has a green background this test has failed.</strong></p>
 </body>
</html>