def test_signal(self, mock_output):
exp_inhibit = 21
exp_pins = [4, 5, 6, 8]
d = Demux(exp_inhibit, exp_pins)
mock_output.reset_mock()
d.signal(3)
mock_output.assert_has_calls(
[call(exp_pins[0], GPIO.HIGH),
call(exp_pins[1], GPIO.HIGH)],
any_order=True)
mock_output.reset_mock()
d.signal(8)
mock_output.assert_has_calls([call(exp_pins[3], GPIO.HIGH)],
any_order=True)
