| Test behavior of Document.replaceChild() when oldChild is null. | |
| On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". | |
| PASS document.replaceChild(document.firstChild, null) threw exception Error: NOT_FOUND_ERR: DOM Exception 8. | |
| PASS successfullyParsed is true | |
| TEST COMPLETE | |