假设前

首先，提供的代码似乎有一个小错误（除了指示错误），您应该更改函数参数的顺序，如def exponential_backoff_retry(self, function,n=1, *args):而不是def exponential_backoff_retry(self, function, *args, n=1):，或者如果您更喜欢在递归函数调用return self.exponential_backoff_retry(function, *args, n=n)中将n作为命名参数

关于如何测试的主要答案

您可以创建一个模拟类来保存函数调用计数器

class MockFunctionHelperClass:
    def __init__(self, failed_attempts_before_success: int) -> None:
        self.failed_attempts_before_success = failed_attempts_before_success
        self.attempts_counter = 0

    def mock_function(self, return_value):
        self.attempts_counter += 1
        if self.attempts_counter <= self.failed_attempts_before_success:
            raise Exception
        return return_value

您可以在测试方法中使用helper类，如下所示：

def test_success_before_max_retries():
    failed_attempts_before_success = 2
    expected_result = True
    mock_function_helper_class = MockFunctionHelperClass(failed_attempts_before_success)
    result = Retry().exponential_backoff_retry(
    mock_function_helper_class.mock_function, 1, expected_result
)
    assert result == expected_result
    assert (
    mock_function_helper_class.attempts_counter
    == failed_attempts_before_success + 1
)

或

def test_failed_attempt_limit():
    expected_result = True
    mock_function_helper_class = MockFunctionHelperClass(3)
    result = Retry().exponential_backoff_retry(
    mock_function_helper_class.mock_function, 8, expected_result
    )
    assert result == None
    assert mock_function_helper_class.attempts_counter == 2