<!DOCTYPE html>
<html>
<head>
  <style>
    div {
      width: 100px;
      height: 100px;
      color: green;
      background-color: blue;
      box-shadow: 20px 20px red;
      box-shadow: 20px 20px currentColor;
    }
  </style>
<script>
if (window.testRunner)
    window.testRunner.dumpAsText(true);
</script>
</head>
<body>
  <div/>
</body>
</html>