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from unittest import TestCase
from aiortc.rtcrtpparameters import RTCRtpCodecCapability
from aiortc.rtcrtptransceiver import RTCRtpTransceiver
class RTCRtpTransceiverTest(TestCase):
def test_codec_preferences(self):
transceiver = RTCRtpTransceiver("audio", None, None)
self.assertEqual(transceiver._preferred_codecs, [])
# set empty preferences
transceiver.setCodecPreferences([])
self.assertEqual(transceiver._preferred_codecs, [])
# set single codec
transceiver.setCodecPreferences(
[RTCRtpCodecCapability(mimeType="audio/PCMU", clockRate=8000, channels=1)]
)
self.assertEqual(
transceiver._preferred_codecs,
[RTCRtpCodecCapability(mimeType="audio/PCMU", clockRate=8000, channels=1)],
)
# set single codec (duplicated)
transceiver.setCodecPreferences(
[
RTCRtpCodecCapability(
mimeType="audio/PCMU", clockRate=8000, channels=1
),
RTCRtpCodecCapability(
mimeType="audio/PCMU", clockRate=8000, channels=1
),
]
)
self.assertEqual(
transceiver._preferred_codecs,
[RTCRtpCodecCapability(mimeType="audio/PCMU", clockRate=8000, channels=1)],
)
# set single codec (invalid)
with self.assertRaises(ValueError) as cm:
transceiver.setCodecPreferences(
[
RTCRtpCodecCapability(
mimeType="audio/bogus", clockRate=8000, channels=1
)
]
)
self.assertEqual(str(cm.exception), "Codec is not in capabilities")
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