Allow external requests

[k4nar]

Sometimes,you want to mock a specific service, but you still want to be able to reach other services. With this PR, if allow_external_requests is True, calls to non mocked urls don't throw ConnectionError.

This is somewhat similar to #39.

EDIT: If someone is interested by this behavior, note that change may never be included in responses, as per @dcramer's comment in #39.
If you need a way to mock an API while being able to make external requests, request-mock seems to be a good option.

[bersace]

How to allow external requests with responses.activate ?

[k4nar]

@bersace : Like with assert_all_requests_are_fired, you have to instanciate a RequestsMock object. For example:

rsps = RequestsMock(allow_external_requests=True)

@rsps.activate()
def test_some_stuff():
    ...

[bersace]

ok. cool.

[Daenyth]

Does this have a large benefit over doing the first request inside a with block and the second request outside it? It seems like it would make it easy to make mistakes when writing a test with this enabled.

[k4nar]

@Daenyth : If you can make your request outside the with then no, there is no benefit.
However if you are testing a function calling another service that you don't want to mock then you don't really have the choice.

[adamtheturtle]

To add my 👍 to this: I wanted to add tests to a legacy function which uses requests to interact with two services. In order to use responses for one service, I'd have to create mocks for both, which I'm just not ready to do. Fortunately, switching to requests-mock wasn't too painful but I'd have rather not done this.

[dcramer]

i realize this is ancient, but I do want to get support for this in. That said, I'd like to have the behavior be something like responses.allow_external_domains('domain.com', 'otherdomain.com'), since one of responses goals is to ensure you dont accidentally rely on being network connected

[kathawala]

I think this PR should be closed, as the functionality proposed here was added by #174

[k4nar]

Cool thanks 👍 .