<svg xmlns="http://www.w3.org/2000/svg" height="200" width="400" onload="test()">
 <script type="text/javascript">
 if (window.layoutTestController)
     layoutTestController.dumpAsText();
 function test() {
     alert('The test has passed.')
   }
 </script>
 <text x="20" y="20" font-size="20">A dialog should appear and say the test has passed.</text>
</svg>