def test_age_stupid_raises_error(self):
date_of_birth = date(2010, 1, 1)
user = User("id", date_of_birth)
with self.assertRaises(ValueError):
user.age(date(2000, 1, 1))
def test_age(self):
date_of_birth = date(2012, 1, 2)
user = User("id", date_of_birth)
self.assertEqual(user.age(date(2016, 1, 1)), 3)
self.assertEqual(user.age(date(2016, 1, 2)), 4)
