def test_receiver_already_partially_consumed_2(self):
stream = QuicStream(stream_id=0)
self.assertEqual(
stream.receiver.handle_frame(
QuicStreamFrame(offset=0, data=b"01234567")),
StreamDataReceived(data=b"01234567", end_stream=False,
stream_id=0),
)
self.assertEqual(
stream.receiver.handle_frame(
QuicStreamFrame(offset=16, data=b"abcdefgh")),
None,
)
self.assertEqual(
stream.receiver.handle_frame(
QuicStreamFrame(offset=2, data=b"23456789012345")),
StreamDataReceived(data=b"89012345abcdefgh",
end_stream=False,
stream_id=0),
)
self.assertEqual(bytes(stream.receiver._buffer), b"")
self.assertEqual(list(stream.receiver._ranges), [])
self.assertEqual(stream.receiver._buffer_start, 24)
def test_receiver_already_fully_consumed(self):
stream = QuicStream(stream_id=0)
# add data at offset 0
self.assertEqual(
stream.receiver.handle_frame(
QuicStreamFrame(offset=0, data=b"01234567")),
StreamDataReceived(data=b"01234567", end_stream=False,
stream_id=0),
)
self.assertEqual(bytes(stream.receiver._buffer), b"")
self.assertEqual(list(stream.receiver._ranges), [])
self.assertEqual(stream.receiver._buffer_start, 8)
# add data again at offset 0
self.assertEqual(
stream.receiver.handle_frame(
QuicStreamFrame(offset=0, data=b"01234567")),
None,
)
self.assertEqual(bytes(stream.receiver._buffer), b"")
self.assertEqual(list(stream.receiver._ranges), [])
self.assertEqual(stream.receiver._buffer_start, 8)
# add data again at offset 0
self.assertEqual(
stream.receiver.handle_frame(QuicStreamFrame(offset=0,
data=b"01")), None)
self.assertEqual(bytes(stream.receiver._buffer), b"")
self.assertEqual(list(stream.receiver._ranges), [])
self.assertEqual(stream.receiver._buffer_start, 8)
def test_recv_ordered(self):
stream = QuicStream()
# add data at start
stream.add_frame(QuicStreamFrame(offset=0, data=b"01234567"))
self.assertEqual(bytes(stream._recv_buffer), b"01234567")
self.assertEqual(list(stream._recv_ranges), [range(0, 8)])
self.assertEqual(stream._recv_buffer_start, 0)
# pull data
self.assertEqual(stream.pull_data(), b"01234567")
self.assertEqual(bytes(stream._recv_buffer), b"")
self.assertEqual(list(stream._recv_ranges), [])
self.assertEqual(stream._recv_buffer_start, 8)
# add more data
stream.add_frame(QuicStreamFrame(offset=8, data=b"89012345"))
self.assertEqual(bytes(stream._recv_buffer), b"89012345")
self.assertEqual(list(stream._recv_ranges), [range(8, 16)])
self.assertEqual(stream._recv_buffer_start, 8)
# pull data
self.assertEqual(stream.pull_data(), b"89012345")
self.assertEqual(bytes(stream._recv_buffer), b"")
self.assertEqual(list(stream._recv_ranges), [])
self.assertEqual(stream._recv_buffer_start, 16)
def test_receiver_unordered(self):
stream = QuicStream(stream_id=0)
# add data at offset 8
self.assertEqual(
stream.receiver.handle_frame(
QuicStreamFrame(offset=8, data=b"89012345")),
None,
)
self.assertEqual(bytes(stream.receiver._buffer),
b"\x00\x00\x00\x00\x00\x00\x00\x0089012345")
self.assertEqual(list(stream.receiver._ranges), [range(8, 16)])
self.assertEqual(stream.receiver._buffer_start, 0)
self.assertEqual(stream.receiver.highest_offset, 16)
# add data at offset 0
self.assertEqual(
stream.receiver.handle_frame(
QuicStreamFrame(offset=0, data=b"01234567")),
StreamDataReceived(data=b"0123456789012345",
end_stream=False,
stream_id=0),
)
self.assertEqual(bytes(stream.receiver._buffer), b"")
self.assertEqual(list(stream.receiver._ranges), [])
self.assertEqual(stream.receiver._buffer_start, 16)
self.assertEqual(stream.receiver.highest_offset, 16)
def test_recv_fin_twice(self):
stream = QuicStream(stream_id=0)
stream.add_frame(QuicStreamFrame(offset=0, data=b"01234567"))
stream.add_frame(QuicStreamFrame(offset=8, data=b"89012345", fin=True))
stream.add_frame(QuicStreamFrame(offset=8, data=b"89012345", fin=True))
self.assertEqual(stream.pull_data(), b"0123456789012345")
def test_recv_ordered(self):
stream = QuicStream(stream_id=0)
# add data at start
self.assertEqual(
stream.add_frame(QuicStreamFrame(offset=0, data=b"01234567")),
StreamDataReceived(data=b"01234567", end_stream=False,
stream_id=0),
)
self.assertEqual(bytes(stream._recv_buffer), b"")
self.assertEqual(list(stream._recv_ranges), [])
self.assertEqual(stream._recv_buffer_start, 8)
# add more data
self.assertEqual(
stream.add_frame(QuicStreamFrame(offset=8, data=b"89012345")),
StreamDataReceived(data=b"89012345", end_stream=False,
stream_id=0),
)
self.assertEqual(bytes(stream._recv_buffer), b"")
self.assertEqual(list(stream._recv_ranges), [])
self.assertEqual(stream._recv_buffer_start, 16)
# add data and fin
self.assertEqual(
stream.add_frame(
QuicStreamFrame(offset=16, data=b"67890123", fin=True)),
StreamDataReceived(data=b"67890123", end_stream=True, stream_id=0),
)
self.assertEqual(bytes(stream._recv_buffer), b"")
self.assertEqual(list(stream._recv_ranges), [])
self.assertEqual(stream._recv_buffer_start, 24)
def test_recv_fin(self):
stream = QuicStream(stream_id=0)
self.assertEqual(
stream.add_frame(QuicStreamFrame(offset=0, data=b"01234567")),
StreamDataReceived(data=b"01234567", end_stream=False, stream_id=0),
)
self.assertEqual(
stream.add_frame(QuicStreamFrame(offset=8, data=b"89012345", fin=True)),
StreamDataReceived(data=b"89012345", end_stream=True, stream_id=0),
)
def test_recv_fin_then_data(self):
stream = QuicStream(stream_id=0)
stream.add_frame(QuicStreamFrame(offset=0, data=b"0123", fin=True))
# data beyond final size
with self.assertRaises(FinalSizeError) as cm:
stream.add_frame(QuicStreamFrame(offset=0, data=b"01234567"))
self.assertEqual(str(cm.exception), "Data received beyond final size")
# final size would be lowered
with self.assertRaises(FinalSizeError) as cm:
stream.add_frame(QuicStreamFrame(offset=0, data=b"01", fin=True))
self.assertEqual(str(cm.exception), "Cannot change final size")
def test_recv_already_partially_consumed(self):
stream = QuicStream()
stream.add_frame(QuicStreamFrame(offset=0, data=b"01234567"))
self.assertEqual(stream.pull_data(), b"01234567")
stream.add_frame(QuicStreamFrame(offset=0, data=b"0123456789012345"))
self.assertEqual(bytes(stream._recv_buffer), b"89012345")
self.assertEqual(list(stream._recv_ranges), [range(8, 16)])
self.assertEqual(stream._recv_buffer_start, 8)
self.assertEqual(stream.pull_data(), b"89012345")
self.assertEqual(stream._recv_buffer_start, 16)
def test_recv_fin_out_of_order(self):
stream = QuicStream(stream_id=0)
# add data at offset 8 with FIN
self.assertEqual(
stream.add_frame(QuicStreamFrame(offset=8, data=b"89012345", fin=True)),
None,
)
# add data at offset 0
self.assertEqual(
stream.add_frame(QuicStreamFrame(offset=0, data=b"01234567")),
StreamDataReceived(data=b"0123456789012345", end_stream=True, stream_id=0),
)
def test_sender_data_lost_fin(self):
stream = QuicStream()
# nothing to send yet
frame = stream.sender.get_frame(8)
self.assertIsNone(frame)
# write data and EOF
stream.sender.write(b"0123456789012345", end_stream=True)
self.assertEqual(list(stream.sender._pending), [range(0, 16)])
self.assertEqual(stream.sender.next_offset, 0)
# send a chunk
self.assertEqual(
stream.sender.get_frame(8),
QuicStreamFrame(data=b"01234567", fin=False, offset=0),
)
self.assertEqual(list(stream.sender._pending), [range(8, 16)])
self.assertEqual(stream.sender.next_offset, 8)
# send another chunk
self.assertEqual(
stream.sender.get_frame(8),
QuicStreamFrame(data=b"89012345", fin=True, offset=8),
)
self.assertEqual(list(stream.sender._pending), [])
self.assertEqual(stream.sender.next_offset, 16)
# nothing more to send
self.assertIsNone(stream.sender.get_frame(8))
self.assertEqual(list(stream.sender._pending), [])
self.assertEqual(stream.sender.next_offset, 16)
# a chunk gets lost
stream.sender.on_data_delivery(QuicDeliveryState.LOST, 8, 16)
self.assertEqual(list(stream.sender._pending), [range(8, 16)])
self.assertEqual(stream.sender.next_offset, 8)
# send chunk again
self.assertEqual(
stream.sender.get_frame(8),
QuicStreamFrame(data=b"89012345", fin=True, offset=8),
)
self.assertEqual(list(stream.sender._pending), [])
self.assertEqual(stream.sender.next_offset, 16)
# both chunks gets acknowledged
stream.sender.on_data_delivery(QuicDeliveryState.ACKED, 0, 16)
self.assertTrue(stream.sender.is_finished)
def test_recv_already_partially_consumed(self):
stream = QuicStream(stream_id=0)
self.assertEqual(
stream.add_frame(QuicStreamFrame(offset=0, data=b"01234567")),
StreamDataReceived(data=b"01234567", end_stream=False, stream_id=0),
)
self.assertEqual(
stream.add_frame(QuicStreamFrame(offset=0, data=b"0123456789012345")),
StreamDataReceived(data=b"89012345", end_stream=False, stream_id=0),
)
self.assertEqual(bytes(stream._recv_buffer), b"")
self.assertEqual(list(stream._recv_ranges), [])
self.assertEqual(stream._recv_buffer_start, 16)
def test_recv_offset_only(self):
stream = QuicStream(stream_id=0)
# add data at offset 0
self.assertEqual(stream.add_frame(QuicStreamFrame(offset=0, data=b"")), None)
self.assertEqual(bytes(stream._recv_buffer), b"")
self.assertEqual(list(stream._recv_ranges), [])
self.assertEqual(stream._recv_buffer_start, 0)
# add data at offset 8
self.assertEqual(stream.add_frame(QuicStreamFrame(offset=8, data=b"")), None)
self.assertEqual(
bytes(stream._recv_buffer), b"\x00\x00\x00\x00\x00\x00\x00\x00"
)
self.assertEqual(list(stream._recv_ranges), [])
self.assertEqual(stream._recv_buffer_start, 0)
def test_receiver_fin_without_data(self):
stream = QuicStream(stream_id=0)
self.assertEqual(
stream.receiver.handle_frame(
QuicStreamFrame(offset=0, data=b"", fin=True)),
StreamDataReceived(data=b"", end_stream=True, stream_id=0),
)
def test_recv_reset_after_fin(self):
stream = QuicStream(stream_id=0)
stream.add_frame(QuicStreamFrame(offset=0, data=b"0123", fin=True)),
self.assertEqual(
stream.handle_reset(final_size=4),
StreamReset(error_code=QuicErrorCode.NO_ERROR, stream_id=0),
)
def test_send_data_lost(self):
stream = QuicStream()
# nothing to send yet
frame = stream.get_frame(8)
self.assertIsNone(frame)
# write data and EOF
stream.write(b"0123456789012345", end_stream=True)
self.assertEqual(list(stream._send_pending), [range(0, 16)])
self.assertEqual(stream.next_send_offset, 0)
# send a chunk
self.assertEqual(
stream.get_frame(8), QuicStreamFrame(data=b"01234567", fin=False, offset=0)
)
self.assertEqual(list(stream._send_pending), [range(8, 16)])
self.assertEqual(stream.next_send_offset, 8)
# send another chunk
self.assertEqual(
stream.get_frame(8), QuicStreamFrame(data=b"89012345", fin=True, offset=8)
)
self.assertEqual(list(stream._send_pending), [])
self.assertEqual(stream.next_send_offset, 16)
# nothing more to send
self.assertIsNone(stream.get_frame(8))
self.assertEqual(list(stream._send_pending), [])
self.assertEqual(stream.next_send_offset, 16)
# a chunk gets lost
stream.on_data_delivery(QuicDeliveryState.LOST, 0, 8)
self.assertEqual(list(stream._send_pending), [range(0, 8)])
self.assertEqual(stream.next_send_offset, 0)
# send chunk again
self.assertEqual(
stream.get_frame(8), QuicStreamFrame(data=b"01234567", fin=False, offset=0)
)
self.assertEqual(list(stream._send_pending), [])
self.assertEqual(stream.next_send_offset, 16)
def test_recv_empty(self):
stream = QuicStream(stream_id=0)
self.assertEqual(bytes(stream._recv_buffer), b"")
self.assertEqual(list(stream._recv_ranges), [])
self.assertEqual(stream._recv_buffer_start, 0)
# empty
self.assertEqual(stream.add_frame(QuicStreamFrame(offset=0, data=b"")), None)
self.assertEqual(bytes(stream._recv_buffer), b"")
self.assertEqual(list(stream._recv_ranges), [])
self.assertEqual(stream._recv_buffer_start, 0)
def test_receiver_fin_out_of_order(self):
stream = QuicStream(stream_id=0)
# add data at offset 8 with FIN
self.assertEqual(
stream.receiver.handle_frame(
QuicStreamFrame(offset=8, data=b"89012345", fin=True)),
None,
)
self.assertEqual(stream.receiver.highest_offset, 16)
self.assertFalse(stream.receiver.is_finished)
# add data at offset 0
self.assertEqual(
stream.receiver.handle_frame(
QuicStreamFrame(offset=0, data=b"01234567")),
StreamDataReceived(data=b"0123456789012345",
end_stream=True,
stream_id=0),
)
self.assertEqual(stream.receiver.highest_offset, 16)
self.assertTrue(stream.receiver.is_finished)
def test_recv_fin_then_data(self):
stream = QuicStream(stream_id=0)
stream.add_frame(QuicStreamFrame(offset=0, data=b"", fin=True))
with self.assertRaises(Exception) as cm:
stream.add_frame(QuicStreamFrame(offset=0, data=b"01234567"))
self.assertEqual(str(cm.exception), "Data received beyond FIN")
def test_recv_fin_without_data(self):
stream = QuicStream(stream_id=0)
stream.add_frame(QuicStreamFrame(offset=0, data=b"", fin=True))
self.assertEqual(stream.pull_data(), b"")
