<svg xmlns="http://www.w3.org/2000/svg">
    <desc>Test that the 'href' attribute is animated correctly.</desc>
    <defs>
        <linearGradient id="red-fill">
            <stop offset="0%"  stop-color="red" />
            <stop offset="100%" stop-color="red" />
        </linearGradient>
        <linearGradient id="green-fill">
            <stop offset="0%"  stop-color="green" />
            <stop offset="100%" stop-color="green" />
        </linearGradient>
        <linearGradient id="gradient" href="#red-fill">
            <set attributeName="href" to="#green-fill" fill="freeze"/>
        </linearGradient>
    </defs>
    <rect id="rect" width="100" height="100" fill="url('#gradient')"/>
</svg>