def test_DIO_set_low(self, mock_init, mock_set_reg):
"""test the member DIO.DIO_set_low(dioName)"""
d = DIO()
pin = 'DIO_01'
d.DIO_set_low(pin)
mock_set_reg.assert_called_with(pin, 0)
mock_init.assert_called_with(SYSCON_BASE)
