Add test_httpbin_accepts_lots_of_get_requests_in_single_session

[msabramo]

This test is actually failing for me at least part of the time on py34.

This was inspired by a bug in httpie:
httpie/cli#278 (comment)

[msabramo]

Notice test fails on py33 with:

=================================== FAILURES ===================================
_________ test_httpbin_accepts_lots_of_get_requests_in_single_session __________
...
        except (ProtocolError, socket.error) as err:
>           raise ConnectionError(err, request=request)
E           requests.exceptions.ConnectionError: ('Connection aborted.', BadStatusLine("''",))
../../../virtualenv/python3.4.2/lib/python3.4/site-packages/requests/adapters.py:407: ConnectionError
----------------------------- Captured stderr call -----------------------------
127.0.0.1 - - [01/Dec/2014 01:51:59] "GET /get HTTP/1.1" 200 332
===================== 1 failed, 13 passed in 1.35 seconds ======================

[msabramo]

Fails locally too:

❯ .tox/py33/bin/py.test --tb=short -k test_httpbin_accepts_lots_of_get_requests_in_single_session --pdb
============================================================================= test session starts ==============================================================================
platform darwin -- Python 3.3.3 -- py-1.4.26 -- pytest-2.6.4
plugins: httpbin
collected 14 items

tests/test_httpbin.py F
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> traceback >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
tests/test_httpbin.py:27: in test_httpbin_accepts_lots_of_get_requests_in_single_session
    assert session.get(httpbin.url + '/get').status_code == 200
.tox/py33/lib/python3.3/site-packages/requests/sessions.py:469: in get
    return self.request('GET', url, **kwargs)
.tox/py33/lib/python3.3/site-packages/requests/sessions.py:457: in request
    resp = self.send(prep, **send_kwargs)
.tox/py33/lib/python3.3/site-packages/requests/sessions.py:569: in send
    r = adapter.send(request, **kwargs)
.tox/py33/lib/python3.3/site-packages/requests/adapters.py:407: in send
    raise ConnectionError(err, request=request)
E   requests.exceptions.ConnectionError: ('Connection aborted.', BadStatusLine("''",))
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> entering PDB >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
> /Users/marca/dev/git-repos/pytest-httpbin/.tox/py33/lib/python3.3/site-packages/requests/adapters.py(407)send()
-> raise ConnectionError(err, request=request)

[msabramo]

I feel like this has something to do with the fact that wsgiref is being used for HTTP/1.1. If I changed http_version to 1.0 then this test always passes.

I'm guessing it has something to do with HTTP/1.1 defaulting to using keep alives rather than closing the connection like in HTTP/1.0.

[msabramo]

PR #16 appears to fix this issue for me.

$ tox
...
  py26: commands succeeded
  py27: commands succeeded
  py34: commands succeeded
  pypy: commands succeeded
  congratulations :)

[sigmavirus24]

Perhaps this should be closed since the commit is in #16