
PASS new RTCTrackEvent() with valid receiver, track, transceiver should succeed 
PASS new RTCTrackEvent() with valid receiver, track, streams, transceiver should succeed 
PASS new RTCTrackEvent() with valid receiver, track, multiple streams, transceiver should succeed 
PASS new RTCTrackEvent() with unrelated receiver, track, streams, transceiver should succeed 
PASS new RTCTrackEvent() with no transceiver should throw TypeError 
PASS new RTCTrackEvent() with no track should throw TypeError 
PASS new RTCTrackEvent() with no receiver should throw TypeError