concurrent question

[Alex Arshavski]

Hi,

I have some testing question:

I have the following code:

with concurrent.futures.ThreadPoolExecutor(max_workers=1) as executor:
    future = executor.submit(send_slack_message, param1, param2, param3)
    while future.running():
        pass
    logging.warning("Slack message sent")

My question is

How can I write a test which checks that I get inside the "while" ?

I use unittest with @patch.

I mean, what should be mocked here and how?

Thanks, Alex A.

[Ram Rachum]

I think you asked your question in a way that's so detached from what you're trying to achieve, that I don't know how to help you. 

If I did answer your question directly, I would probably say to add a function inside the `while`, which would be no-op by default but the test could insert a different function instead of it that it listens to. Or put a log there that the test listens to. But you already knew that, so you're probably looking for something else. 

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[Ram Rachum]

Also, the example is so detached from how `futures` is used, and that makes it harder to understand what's going on. 

[Aur Saraf]

def f(callback=None):

    ...

    while ...:

       callback and callback()

    ...

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