| PASS replaceTrack() sets the track attribute to a new track. | |
| PASS replaceTrack() sets the track attribute to null. | |
| PASS replaceTrack() does not set the track synchronously. | |
| PASS replaceTrack() rejects when the peer connection is closed. | |
| PASS replaceTrack() does not reject when invoked after removeTrack(). | |
| PASS replaceTrack() does not reject after a subsequent removeTrack(). | |