
PASS setRemoteDescription with invalid type and invalid SDP should reject with TypeError 
PASS setRemoteDescription() with invalid SDP and stable state should reject with InvalidStateError 
PASS Negotiation should fire signalingsstate events 
PASS Calling setRemoteDescription() again after one round of remote-offer/local-answer should succeed 
PASS Switching role from offerer to answerer after going back to stable state should succeed