def __init__(self, name, pin, action, reset_state=True):
self.name = name
self.pin = pin
if action not in (Device.ACTION_PULSE, Device.ACTION_SWITCH):
raise DeviceWrongAction("Wrong action selected")
self.action = action
if reset_state:
gpio_commands.mode(pin=self.pin, set_mode="out")
gpio_commands.write(pin=self.pin, value=0)
# We assume that the initial state is "off". It is impossible to read
# actual state as well as the state can be interfered by the physical
# buttons (in case of "PULSE" switches). I will deal with that later. (FIXME)
self.write_state(state=0)
def switch(self):
if self.action == Device.ACTION_SWITCH:
status = int(not self.read_state())
gpio_commands.write(pin=self.pin, value=status)
self.write_state(status)
elif self.action == Device.ACTION_PULSE:
gpio_commands.write(pin=self.pin, value=1)
sleep(0.1)
gpio_commands.write(pin=self.pin, value=0)
self.write_state(int(not self.read_state()))
def test_write_wrong_value(self):
with self.assertRaises(WrongWriteValue):
write(pin=1, value=2)
def test_write_wrong_pin(self):
with self.assertRaises(WrongPinNumber):
write(pin=26, value=1)
def test_write_0_low(self, mock_system):
write(pin=0, value=0)
mock_system.assert_called_with('gpio -g write 0 0')
def test_write_1_high(self, mock_system):
write(pin=1, value=1)
mock_system.assert_called_with('gpio -g write 1 1')