def test__register_session_returns_none_if_no_response():
driver = CIPDriver(CONNECT_PATH)
driver._sock = Mocket()
assert driver._register_session() is None
def test__register_session_returns_configured_session(conf_session):
driver = CIPDriver(CONNECT_PATH)
driver._sock = Mocket(bytes(4) + UDINT.encode(conf_session) + bytes(20))
assert conf_session == driver._register_session()