add more tests to rtcpreceiver

pkg/rtcpreceiver/rtcpreceiver_test.go

@@ -28,14 +28,14 @@ func TestRtcpReceiver(t *testing.T) {
 	byts, _ := rtpPkt.Marshal()
 	rr.OnFrame(base.StreamTypeRtp, byts)
 
-	rtcpPkt := rtcp.SenderReport{
+	srPkt := rtcp.SenderReport{
 		SSRC:        0xba9da416,
 		NTPTime:     0xe363887a17ced916,
 		RTPTime:     1287981738,
 		PacketCount: 714,
 		OctetCount:  859127,
 	}
-	byts, _ = rtcpPkt.Marshal()
+	byts, _ = srPkt.Marshal()
 	rr.OnFrame(base.StreamTypeRtcp, byts)
 
 	res := rr.Report()
@@ -51,6 +51,34 @@ func TestRtcpReceiver(t *testing.T) {
 		},
 	}
 	expected, _ := expectedPkt.Marshal()
+	require.Equal(t, expected, res)
 
+	rtpPkt = rtp.Packet{
+		Header: rtp.Header{
+			Version:        2,
+			Marker:         true,
+			PayloadType:    96,
+			SequenceNumber: 945,
+			Timestamp:      1287987768,
+			SSRC:           0xba9da416,
+		},
+		Payload: []byte("\x00\x00"),
+	}
+	byts, _ = rtpPkt.Marshal()
+	rr.OnFrame(base.StreamTypeRtp, byts)
+
+	res = rr.Report()
+
+	expectedPkt = rtcp.ReceiverReport{
+		SSRC: 0x65f83afb,
+		Reports: []rtcp.ReceptionReport{
+			{
+				SSRC:               0xba9da416,
+				LastSequenceNumber: uint32(1<<16 | 945),
+				LastSenderReport:   uint32(0x887a17ce),
+			},
+		},
+	}
+	expected, _ = expectedPkt.Marshal()
 	require.Equal(t, expected, res)
 }