def test_get_number_of_iterations_starting_on_2_should_return_1(self):
measurer = CollatzConjectureMeasurer()
n = measurer.apply_collatz_conjecture(2)
self.assertIs(n == 1, True, "Iteration number was: " + str(n))
def test_get_number_of_iterations_starting_on_negative_number_should_raise_value_error_exception(self):
with self.assertRaises(ValueError):
measurer = CollatzConjectureMeasurer()
n = measurer.apply_collatz_conjecture(-1)