def test_index_encoder(msg_idx, expected_hex):
buf = BytesIO()
ProtobufSerializer._encode_uvarints(buf, msg_idx)
buf.flush()
# ignore array length prefix
buf.seek(1)
assert binascii.b2a_hex(buf.read()) == expected_hex
# reset reader and test decoder
buf.seek(0)
assert msg_idx == ProtobufDeserializer._decode_index(buf)
def test_index_serialization(pb2):
msg_idx = _create_msg_index(pb2.DESCRIPTOR)
buf = BytesIO()
ProtobufSerializer._encode_uvarints(buf, msg_idx)
buf.flush()
# reset buffer cursor
buf.seek(0)
decoded_msg_idx = ProtobufDeserializer._decode_index(buf)
buf.close()
assert decoded_msg_idx == msg_idx