def test_no_loss_cycle(self):
counter = StreamStatistics(ssrc=0, clockrate=8000)
# receive 10 packets (with sequence cycle)
for packet in self.create_packets(10, 65530):
counter.add(packet)
self.assertEqual(counter.max_seq, 3)
self.assertEqual(counter.packets_received, 10)
self.assertEqual(counter.packets_lost, 0)
self.assertEqual(counter.fraction_lost, 0)
def test_no_jitter(self, mock_time):
counter = StreamStatistics(ssrc=0, clockrate=8000)
packets = self.create_packets(3, 0)
mock_time.return_value = 1531562330.00
counter.add(packets[0])
self.assertEqual(counter._jitter_q4, 0)
self.assertEqual(counter.jitter, 0)
mock_time.return_value = 1531562330.02
counter.add(packets[1])
self.assertEqual(counter._jitter_q4, 0)
self.assertEqual(counter.jitter, 0)
mock_time.return_value = 1531562330.04
counter.add(packets[2])
self.assertEqual(counter._jitter_q4, 0)
self.assertEqual(counter.jitter, 0)
def test_no_loss(self):
counter = StreamStatistics(ssrc=0, clockrate=8000)
packets = self.create_packets(20, 0)
# receive 10 packets
for packet in packets[0:10]:
counter.add(packet)
self.assertEqual(counter.max_seq, 9)
self.assertEqual(counter.packets_received, 10)
self.assertEqual(counter.packets_lost, 0)
self.assertEqual(counter.fraction_lost, 0)
# receive 10 more packets
for packet in packets[10:20]:
counter.add(packet)
self.assertEqual(counter.max_seq, 19)
self.assertEqual(counter.packets_received, 20)
self.assertEqual(counter.packets_lost, 0)
self.assertEqual(counter.fraction_lost, 0)
def test_with_loss(self):
counter = StreamStatistics(ssrc=0, clockrate=8000)
packets = self.create_packets(20, 0)
packets.pop(1)
# receive 9 packets (one missing)
for packet in packets[0:9]:
counter.add(packet)
self.assertEqual(counter.max_seq, 9)
self.assertEqual(counter.packets_received, 9)
self.assertEqual(counter.packets_lost, 1)
self.assertEqual(counter.fraction_lost, 25)
# receive 10 more packets
for packet in packets[9:19]:
counter.add(packet)
self.assertEqual(counter.max_seq, 19)
self.assertEqual(counter.packets_received, 19)
self.assertEqual(counter.packets_lost, 1)
self.assertEqual(counter.fraction_lost, 0)
def create_counter(self):
return StreamStatistics(clockrate=8000, ssrc=0)