python test decorator

def test_params(*params, **kwparams):
    print('test params: ', params, kwparams)
    def decorator(function_results):
        function, result = function_results
        size, args, kwargs = len(result), [], []
        print('number of test cases: ', size)

        for index in range(size):
            arg = []
            for value in [param[index] for param in params]:
                if value != None:
                    arg.append(value)
            args.append(arg)

            kwarg = {}
            for key, value in kwparams.items():
                value = kwparams[key][index]
                if value != None:
                    kwarg[key] = value
            kwargs.append(kwarg)

        for index in range(size):
            computed = function(*args[index], **kwargs[index])
            if computed != result[index]:
                raise AssertionError(f"Test case: args={args[index]} kwargs={kwargs[index]}, return={computed} != {result[index]}")

        return function
    return decorator

def test_results(*results):
    print('test results: ', results)
    def decorator(function):
        return function, results
    return decorator

# goal: test values when initializing function with decorator
@test_params([1, 2, 3], [4, None, 6], z=[2 , 2, None])
@test_results(7, 4, 9)
def add(*args, **kwargs):
    result = sum(args + tuple(kwargs.values()))
    print('add: ', args, kwargs, result)
    return result

print('after definition')
add(12,23, q=12)
add(43,46, w=1233)