def test_function_4 (self) : r = collatz_function(555) self.assert_(r == 31)
def test_function_2 (self) : r = collatz_function(5) self.assert_(r == 6)
def test_function_3 (self) : r = collatz_function(3) self.assert_(r == 8)
def test_function_1 (self) : r = collatz_function(1) self.assert_(r == 1)