def test_reader_reads_data_and_moves_offset(buffer):
read_buff = RingBuffer(name=buffer.name, size=0, create=False)
messages = _messages(3)
expected = [_decode_message(m) for m in messages]
for m in messages:
buffer.put(m)
got = [_decode_message(read_buff.get()) for _ in range(3)]
assert got == expected
assert read_buff.reader_pos() == 48
def test_reader_reads_data_and_moves_offset_when_writer_wraps_around(buffer):
read_buff = RingBuffer(name=buffer.name, size=0, create=False)
messages = _messages(8)
for m in messages[:6]:
buffer.put(m)
[read_buff.get() for _ in range(6)]
for m in messages[6:]:
buffer.put(m)
got = [_decode_message(read_buff.get()) for _ in range(2)]
expected = [_decode_message(m) for m in messages[6:]]
assert got == expected
assert read_buff.reader_pos() == 32