| Test that NETWORK_NO_SOURCE is immutable | |
| On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". | |
| PASS HTMLMediaElement.NETWORK_NO_SOURCE is 3 | |
| PASS HTMLMediaElement.prototype.NETWORK_NO_SOURCE is 3 | |
| PASS element.NETWORK_NO_SOURCE is 3 | |
| PASS HTMLMediaElement.NETWORK_NO_SOURCE is 3 | |
| PASS HTMLAudioElement.prototype.NETWORK_NO_SOURCE is 3 | |
| FAIL element.NETWORK_NO_SOURCE should be 3. Was 15. | |
| PASS successfullyParsed is true | |
| TEST COMPLETE | |