def test_subscribe_to_racer(self):
racer = Racer('Craig', 'Tingey', 123)
observer = Observer('Agro')
observer.subscribe(racer)
self.assertTrue(observer.subscribedtolist[0] == racer)
def test_unsubscribe_to_racer(self):
racer = Racer('Craig', 'Tingey', 123)
observer = Observer('Agro')
observer.subscribe(racer)
observer.unsubscribe(racer)
self.assertTrue(len(observer.subscribedtolist) == 0)
