class TestAlarm(TestCase):
def setUp(self):
self.sensor = FakeSensor()
self.alarm = Alarm(self.sensor)
def test_alarm_is_off_by_default(self):
self.assertFalse(self.alarm.is_on)
def test_alarm_is_off_for_normal_readout(self):
self.sensor.set_value(40)
self.alarm.check_readout()
self.assertFalse(self.alarm.is_on)
def test_alarm_is_on_for_high_readout(self):
self.sensor.set_value(100)
self.alarm.check_readout()
self.assertTrue(self.alarm.is_on)
def test_alarm_is_on_for_low_readout(self):
self.sensor.set_value(5)
self.alarm.check_readout()
self.assertTrue(self.alarm.is_on)
def test_sensor_get_value_is_called_only_once(self):
self.alarm.check_readout()
self.assertEqual(1, self.sensor.called)
def test_alarm_is_on_for_high_readout_using_MM(self):
with patch.object(RealSensor, "get_value", return_value=100):
alarm = Alarm()
alarm.check_readout()
self.assertTrue(alarm.is_on)
def test_alarm_is_on_for_low_readout_using_MM(self):
sensor = MagicMock(RealSensor)
sensor.get_value.return_value = 5
alarm = Alarm(sensor)
alarm.check_readout()
self.assertTrue(alarm.is_on)