def test_send_sack(self):
sack = None
async def mock_send_chunk(c):
nonlocal sack
sack = c
client_transport = DummyDtlsTransport()
client = RTCSctpTransport(client_transport)
client._last_received_tsn = 123
client._send_chunk = mock_send_chunk
run(client._send_sack())
self.assertIsNotNone(sack)
self.assertEqual(sack.duplicates, [])
self.assertEqual(sack.gaps, [])
self.assertEqual(sack.cumulative_tsn, 123)
def test_send_sack_with_gaps(self):
sack = None
async def mock_send_chunk(c):
nonlocal sack
sack = c
client_transport = DummyDtlsTransport()
client = RTCSctpTransport(client_transport)
client._last_received_tsn = 12
client._sack_misordered = [14, 15, 17]
client._send_chunk = mock_send_chunk
run(client._send_sack())
self.assertIsNotNone(sack)
self.assertEqual(sack.duplicates, [])
self.assertEqual(sack.gaps, [(2, 3), (5, 5)])
self.assertEqual(sack.cumulative_tsn, 12)