def test_cycle_27 (self) :
     v = collatz_cyclen(27)
     self.assert_(v == 112)
 def test_cyclen_2(self):
     v = collatz_cyclen(2)
     self.assert_(v == 2)
 def test_cyclen_of_22(self):
     v = collatz_cyclen(22)
     self.assert_(v == 16)
 def test_cyclen_10(self):
     v = collatz_cyclen(10)
     self.assert_(v == 7)
 def test_cyclen_of_1(self):
     v = collatz_cyclen(1)
     self.assert_(v == 1)