def test_backend_read_digital_state_requires_pin_mode() -> None:
"""Check that pin must be in DIGITAL_INPUT* mode for read digital state to work."""
backend = SBArduinoHardwareBackend("COM0", SBArduinoSerial)
backend.set_gpio_pin_mode(2, GPIOPinMode.DIGITAL_OUTPUT)
assert backend.get_gpio_pin_mode(2) is not GPIOPinMode.DIGITAL_INPUT
with pytest.raises(ValueError):
backend.read_gpio_pin_digital_state(2)
def test_backend_read_digital_state() -> None:
"""Test that we can read the digital state of a pin."""
backend = SBArduinoHardwareBackend("COM0", SBArduinoSerial)
serial = cast(SBArduinoSerial, backend._serial)
serial.check_data_sent_by_constructor()
backend.set_gpio_pin_mode(2, GPIOPinMode.DIGITAL_INPUT)
serial.check_sent_data(b"W 2 Z\n")
serial.append_received_data(b"> H", newline=True)
assert backend.read_gpio_pin_digital_state(2) is True
serial.check_sent_data(b"R 2\n")
serial.append_received_data(b"> L", newline=True)
assert backend.read_gpio_pin_digital_state(2) is False
serial.check_sent_data(b"R 2\n")
serial.append_received_data(b"> X", newline=True) # invalid
with pytest.raises(CommunicationError):
backend.read_gpio_pin_digital_state(2)
serial.check_sent_data(b"R 2\n")
serial.check_all_received_data_consumed()
def test_backend_read_digital_state_requires_digital_pin() -> None:
"""Check that pins 14-19 are not supported by read digital state."""
backend = SBArduinoHardwareBackend("COM0", SBArduinoSerial)
with pytest.raises(NotSupportedByHardwareError):
backend.read_gpio_pin_digital_state(14)