| Ensures that appendChild() throws an exception if mutation even handler does something wrong | |
| On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". | |
| PASS newparent.appendChild(child); threw exception HierarchyRequestError (DOM Exception 3): The operation would yield an incorrect node tree.. | |
| PASS successfullyParsed is true | |
| TEST COMPLETE | |