| Appending an ancestor to a shadow tree should throw an exception | |
| On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". | |
| PASS shadowDiv.appendChild(container) threw exception HierarchyRequestError: Failed to execute 'appendChild' on 'Node': The new child element contains the parent.. | |
| PASS successfullyParsed is true | |
| TEST COMPLETE | |