def test_setup_adc(self):
        ADC.setup()

        files = os.listdir('/sys/devices')
        ocp = '/sys/devices/'+[s for s in files if s.startswith('ocp')][0]
        files = os.listdir(ocp)
        helper_path = ocp+'/'+[s for s in files if s.startswith('helper')][0]

        assert os.path.exists(helper_path + "/AIN1")
    def test_read_raw_adc(self):
        ADC.setup()
        value = -1
        value = ADC.read_raw("P9_40")

        assert value != -1
 def test_read_raw_adc_no_setup(self):
     with pytest.raises(RuntimeError):   
         ADC.read_raw("P9_40")