Pin to httpbin 0.5.0.

[Lukasa]

The release of httpbin 0.6.0 seems to have broken pytest-httpbin in a surprising way. We want to pin that version out, and probably also alert @kevin1024 about the problem.

Resolves #4259.

[codecov-io]

Codecov Report

Merging #4261 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #4261   +/-   ##
=======================================
  Coverage   88.66%   88.66%           
=======================================
  Files          18       18           
  Lines        2021     2021           
=======================================
  Hits         1792     1792           
  Misses        229      229

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[sigmavirus24]

[kevin1024]

OK, this is a really crazy rabbit hole - I think @Lukasa is actually more up what's going on than I.

I think the problem is caused by this commit to httpbin by @kennethreitz:

kennethreitz/httpbin@2e94212

which is an attempt to fix kennethreitz/httpbin#340

BUT I think it only fixes it on Gunicorn? And pytest-httpbin uses werkzeug which has chunked encoding issues so it ends up causing problems: pallets/werkzeug#1149

[kennethreitz]

@kevin1024 we can remove that — I don't think it fixed anything.

[kevin1024]

@kennethreitz sweet, I think this problem should magically disappear in that case 🌟