chromium/src/third_party/blink/web_tests/fast/dom/shadow/shadow-hierarchy-exception.html - manifest_repos/chromium_src - Git at Google

 <!DOCTYPE html>
 <script src="../../../resources/js-test.js"></script>
 <div id=container>
   <div>
       <span></span>
   </div>
 </div>
 <script>
 description('Appending an ancestor to a shadow tree should throw an exception');
 var container = document.getElementById('container');
 var span = container.querySelector('span');
 var shadow = span.attachShadow({mode: 'open'});
 var shadowDiv = shadow.appendChild(document.createElement('div'));
 shouldThrow('shadowDiv.appendChild(container)');
 </script>
	<!DOCTYPE html>
	<script src="../../../resources/js-test.js"></script>
	<div id=container>
	<div>
	<span></span>
	</div>
	</div>
	<script>
	description('Appending an ancestor to a shadow tree should throw an exception');
	var container = document.getElementById('container');
	var span = container.querySelector('span');
	var shadow = span.attachShadow({mode: 'open'});
	var shadowDiv = shadow.appendChild(document.createElement('div'));
	shouldThrow('shadowDiv.appendChild(container)');
	</script>