def test_len_3(self):
v = collatz_len(1)
self.assertEqual(v, 1)
def test_len_4(self):
v = collatz_len(900)
self.assertEqual(v, 55)
def test_len_1(self):
v = collatz_len(5)
self.assertEqual(v, 6)
def test_len_2(self):
v = collatz_len(10)
self.assertEqual(v, 7)
def test_len_6(self):
v = collatz_len(12678)
self.assertEqual(v, 56)
def test_len_5(self):
v = collatz_len(23456)
self.assertEqual(v, 101)
def test_len_3 (self) :
v = collatz_len(201, 210)
self.assert_(v == 89)
def test_len_2 (self) :
v = collatz_len(100, 200)
self.assert_(v == 125)
def test_len_1 (self) :
v = collatz_len(1, 10)
self.assert_(v == 20)
