chromium/src/third_party/blink/web_tests/fast/dom/importNode-unsupported-node-type.html - manifest_repos/chromium_src - Git at Google

 <!DOCTYPE html>
 <script src="../../resources/js-test.js"></script>
 <script>
 description('importNode should throw informative errors for unsupported node types');

 var doc = document.implementation.createHTMLDocument('');
 shouldThrow("document.importNode(doc)")

 var shadow = document.createElement('div').attachShadow({mode: 'open'});
 shouldThrow("document.importNode(shadow)")
 </script>
	<!DOCTYPE html>
	<script src="../../resources/js-test.js"></script>
	<script>
	description('importNode should throw informative errors for unsupported node types');

	var doc = document.implementation.createHTMLDocument('');
	shouldThrow("document.importNode(doc)")

	var shadow = document.createElement('div').attachShadow({mode: 'open'});
	shouldThrow("document.importNode(shadow)")
	</script>