Unreliable redirect test

[Liquidsoul]

New Issue Checklist

• I have tried with the latest version of OHHTTPStubs
• I have read the README
• I have read the Using the right Swift Version of OHHTTPStubs for your project section
• I have searched in the existing issues
• I have read the OHHTTPStubs wiki to see if there wasn't a detailed page talking about my issue

Environment

• version of OHHTTPStubs: master

Issue Description

Following the introduction of #263 the test - [NSURLSessionTests test_NSURLSessionDefaultConfig_MethodAndDataRetentionOnRedirect] fails most of the time (see @AliSoftware comment).
We need to investigate this issue so that we can have a reliable CI.

[Liquidsoul]

Ok, after some investigations this seems related to #230 (comment)

I have experienced the same issues (redirect data without response object) for the failures.
So this seems like a NSURLProtocol bug.

So now I see several options:

• we find a workaround in the library to make this reliable (that seems unlikely to me)
• we find a workaround for the tests, but this would mean that client code can fail, and this occurs a lot in the tests in my experience
• we disable the tests and document that redirections are not correctly supported by OHHTTPStubs because of an Apple bug

[AliSoftware]

😢

I think we'll have to go with solution 3 then. I think we could still keep the code handling the redirections, but just document properly that there are issues due to the Apple bug.