def test_exit_city_karamu(self):
c = Car(1)
self.assertEqual(c.exit_city("Karamu Rd"),
"Driver 1 has gone to Napier")
def test_exit_city_omahu(self):
c = Car(1)
self.assertEqual(c.exit_city("Omahu Rd"),
"Driver 1 has gone to Flaxmere")
def test_exit_city(self):
c = Car(1)
self.assertEqual(c.exit_city(None), None)