def test_trivial1(self): self.assertEqual(change(0, frozenset({1, 2, 3})), 1)
def test_trivial0(self): self.assertEqual(change(0, frozenset()), 1)
def test_trivial7(self): self.assertEqual(change(3, frozenset({1, 2})), 2)
def test_trivial5(self): self.assertEqual(change(2, frozenset({1})), 1)
def test_trivial3(self): self.assertEqual(change(4, frozenset({1, 2})), 3)
def test_trivial2(self): self.assertEqual(change(2, frozenset({6, 9})), 0)