LayoutTests/svg/filters/animate-fill.svg

<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
    <title>The rectangle should rapidly animate to green.</title>
<defs>
    <filter id="filt">
        <feOffset />
    </filter>
</defs>
<rect id="rect" width="100px" height="100px" x="0" y="0" fill="red" filter="url(#filt)" />
<script>
    function finish()
    {
        document.getElementById('rect').setAttribute('fill', 'green');

        if (window.layoutTestController)
            layoutTestController.notifyDone();
    }

    if (window.layoutTestController) {
        layoutTestController.waitUntilDone();
        layoutTestController.display();
    }
    
    setTimeout(finish, 0);
</script>
</svg>