| Test that appropriate exceptions are thrown when adding children to a ProcessingInstruction. | |
| On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". | |
| PASS pi.appendChild(null) threw exception Error: HIERARCHY_REQUEST_ERR: DOM Exception 3. | |
| PASS pi.appendChild(div) threw exception Error: HIERARCHY_REQUEST_ERR: DOM Exception 3. | |
| PASS pi.appendChild(textNode) threw exception Error: HIERARCHY_REQUEST_ERR: DOM Exception 3. | |
| PASS successfullyParsed is true | |
| TEST COMPLETE | |