LayoutTests/fast/shadow-dom/svg-radial-gradient-href-in-shadow-tree.html - WebKit - Git at Google

 <!DOCTYPE html>
 <html>
 <body>
 <p>Test passes if you see a single 100px by 100px green box below.</p>
 <div id="host" style="width: 100px; height: 100px;"></div>
 <svg>
     <radialGradient id="gradient">
         <stop offset="0%" stop-color="red" />
     </radialGradient>
 </svg>
 <template>
     <svg viewbox="0 0 100 100">
         <radialGradient id="gradient">
             <stop offset="0%" stop-color="green" />
         </radialGradient>
         <radialGradient id="gradientUse" fill="red" href="#gradient"></radialGradient>
         <rect id="rect" width="100" height="100" fill="url(#gradientUse)">
     </svg>
 </template>
 <script>

 const shadowRoot = host.attachShadow({mode: 'closed'});
 shadowRoot.appendChild(document.querySelector('template').content.cloneNode(true));

 </script>
 </body>
 </html>
	<!DOCTYPE html>
	<html>
	<body>
	<p>Test passes if you see a single 100px by 100px green box below.</p>
	<div id="host" style="width: 100px; height: 100px;"></div>
	<svg>
	<radialGradient id="gradient">
	<stop offset="0%" stop-color="red" />
	</radialGradient>
	</svg>
	<template>
	<svg viewbox="0 0 100 100">
	<radialGradient id="gradient">
	<stop offset="0%" stop-color="green" />
	</radialGradient>
	<radialGradient id="gradientUse" fill="red" href="#gradient"></radialGradient>
	<rect id="rect" width="100" height="100" fill="url(#gradientUse)">
	</svg>
	</template>
	<script>

	const shadowRoot = host.attachShadow({mode: 'closed'});
	shadowRoot.appendChild(document.querySelector('template').content.cloneNode(true));

	</script>
	</body>
	</html>