def test_feed_tail_split():
buffer = Buffer(bytes([0, 0]))
buffer.feed(bytes([1, 2, 3, 0]))
assert not buffer.is_message_ready
buffer.feed(bytes([0]))
assert buffer.is_message_ready
assert buffer.get_message() == bytes([1, 2, 3, 0, 0])
def test_feed_shorter_than_tail():
buffer = Buffer(bytes([0, 0]))
buffer.feed(bytes([1]))
buffer.feed(bytes([2]))
buffer.feed(bytes([3]))
buffer.feed(bytes([0]))
assert not buffer.is_message_ready
buffer.feed(bytes([0]))
assert buffer.is_message_ready
assert buffer.get_message() == bytes([1, 2, 3, 0, 0])
async def test_buffered_read(state, session, chunk_size):
buffer = Buffer(TAIL)
log.info("Testing buffered read with chunk_size=%d", chunk_size)
cmd = GetNumberOfZonesCommand(state).raw
await session.write(cmd)
state.increment_frame_number()
# this is the code under test
while not buffer.is_message_ready:
chunk = await session.read(chunk_size)
buffer.feed(chunk)
res = buffer.get_message()
number_of_zones = GetNumberOfZonesResponse(res).number
log.info("Got number_of_zones=%d ", number_of_zones)
def test_reset():
buffer = Buffer(bytes([0, 0]))
buffer.feed(bytes([5, 5, 5]))
buffer.reset()
buffer.feed(bytes([1, 2, 3, 0, 0]))
assert buffer.get_message() == bytes([1, 2, 3, 0, 0])
def test_feed_get_message_incomplete():
buffer = Buffer(bytes([0, 0]))
buffer.feed(bytes([1, 2, 3, 0]))
with pytest.raises(expected_exception=ValueError):
assert buffer.get_message()