8 PASS pc.addTrack(null) threw exception TypeError: Argument 1 ('track') to RTCPeerConnection.addTrack must be an instance of MediaStreamTrack.
9 PASS pc.addTrack({}) threw exception TypeError: Argument 1 ('track') to RTCPeerConnection.addTrack must be an instance of MediaStreamTrack.
10 PASS pc.addTrack(track, null) threw exception TypeError: Argument 2 ('streams') to RTCPeerConnection.addTrack must be an instance of MediaStream.
11 PASS pc.addTrack(track, {}) threw exception TypeError: Argument 2 ('streams') to RTCPeerConnection.addTrack must be an instance of MediaStream.
12 PASS pc.addTrack(track, stream, null) threw exception TypeError: Argument 3 ('streams') to RTCPeerConnection.addTrack must be an instance of MediaStream.
8PASS pc.addTrack(null) threw exception TypeError: Argument 1 ('track') to webkitRTCPeerConnection.addTrack must be an instance of MediaStreamTrack.
9PASS pc.addTrack({}) threw exception TypeError: Argument 1 ('track') to webkitRTCPeerConnection.addTrack must be an instance of MediaStreamTrack.
10PASS pc.addTrack(track, null) threw exception TypeError: Argument 2 ('streams') to webkitRTCPeerConnection.addTrack must be an instance of MediaStream.
11PASS pc.addTrack(track, {}) threw exception TypeError: Argument 2 ('streams') to webkitRTCPeerConnection.addTrack must be an instance of MediaStream.
12PASS pc.addTrack(track, stream, null) threw exception TypeError: Argument 3 ('streams') to webkitRTCPeerConnection.addTrack must be an instance of MediaStream.