def test_custom_operators(self):
iterable = [MockCustomOperators(i) for i in range(1, 5)]
assert average(iterable, lambda x: x).value == 2.5
def test_result(self):
assert average([1, 2, 3, 4], lambda x: x) == 2.5
assert average([1, 2, 3, 4], lambda x: x ** 2) == 7.5