def test_get_serial_number_random(self):
driver = UnipiDALIDriver()
driver._next_sn = 5
self.assertEqual(driver._get_sn(), 6)
def test_get_serial_number_overflows(self):
driver = UnipiDALIDriver()
driver._next_sn = 255
self.assertEqual(driver._get_sn(), 1)
def test_get_serial_number(self):
driver = UnipiDALIDriver()
driver._next_sn = 1
self.assertEqual(driver._get_sn(), 2)