def test_open_returns_false_if_register_session_falsy():
driver = CIPDriver(CONNECT_PATH)
driver._sock = Mocket()
assert not driver.open()
def test_open_returns_true_if_register_session_truthy():
with mock.patch.object(CIPDriver, '_register_session') as mock_register:
mock_register.return_value = 1
driver = CIPDriver(CONNECT_PATH)
driver._sock = Mocket()
assert driver.open()
def test_open_raises_commerror_on_connect_fail():
with mock.patch.object(Socket, 'connect') as mock_connect:
mock_connect.side_effect = Exception
driver = CIPDriver(CONNECT_PATH)
with pytest.raises(CommError):
driver.open()
