def test_rule_3(self):
r3 = Atom(Contains(3), ToFizz())
self.assertEquals((True, 'Fizz'), r3.apply(3))
self.assertEquals((True, 'Fizz'), r3.apply(13))
self.assertEquals((True, 'Fizz'), r3.apply(31))
self.assertEquals((False, ''), r3.apply(24))