def test_15_must_return_46(self): self.assertEqual(check_collatz(15), 46)
def test_13_must_return_40(self): self.assertEqual(check_collatz(13), 40)
def test_5_must_return_16(self): self.assertEqual(check_collatz(5), 16)
def test_16_must_return_8(self): self.assertEqual(check_collatz(16), 8)
def test_20_must_return_10(self): self.assertEqual(check_collatz(10), 5)
def test_40_must_return_20(self): self.assertEqual(check_collatz(40), 20)