def test_collatz_seq_2(self):
start = 9
seq = [9, 28, 14, 7, 22, 11, 34, 17, 52, 26, 13, 40, 20, 10, 5, 16, 8, 4, 2, 1]
self.assertEqual(collatz_seq(start), seq)
def test_collatz_seq_3(self):
start = 10
seq = [10, 5, 16, 8, 4, 2, 1]
self.assertEqual(collatz_seq(start), seq)
def test_collatz_seq_1(self):
start = 2
seq = [2, 1]
self.assertEqual(collatz_seq(start), seq)
