Handle 500 Internal Server Error with RedcapError

[angus-lherrou]

Fixes #261.

Also raises a RedcapError from any JSONDecodeError in the response.json() call, but this can be reverted if it's too out of scope for this PR.

[angus-lherrou]

@pwildenhain I would like to add a unit test for this but I'm not sure how to mock an internal server error in the testing framework

[codecov]

Codecov Report

Merging #263 (ab45bd9) into master (a507d1a) will decrease coverage by 0.35%.
The diff coverage is 71.42%.

@@             Coverage Diff             @@
##            master     #263      +/-   ##
===========================================
- Coverage   100.00%   99.65%   -0.35%     
===========================================
  Files           19       19              
  Lines          568      573       +5     
===========================================
+ Hits           568      571       +3     
- Misses           0        2       +2     

Impacted Files	Coverage Δ
redcap/request.py	97.22% <71.42%> (-2.78%)	⬇️

[pwildenhain]

@pwildenhain I would like to add a unit test for this but I'm not sure how to mock an internal server error in the testing framework

Yea the unit testing framework is a lot to take in at first, but it's actually pretty neat, and could be good to learn if you're ever looking to add unit tests for one of your own API wrapper packages

I would recommend building in a fake json decode error and fake 500 response into some handlers for the survey project test fixture (found in tests/unit/test_survey_project.py at the top)

You'll see in that fixture that it's dynamically looking for request handlers, which you can find for the survey project fixture at the end of tests/unit/callback_utils.py

I suggest adding a few more handlers for things like DAGs, users, etc and then raising a json decode error in one of them and returning a 500 (instead of a 201) in the other one.

Then add tests for that survey project where you try to access those records and use pytest.raises(RedCapError) to ensure that they were caught

Let me know if this is unclear, or if you are not interested in adding tests and I can try to add them in.

Also sorry for the crap formatting I'm writing this on mobile

[angus-lherrou]

Thanks, I will take a crack at it when I have a chance this week.