add with_mock_dir

[maelle]

Fix #40

[maelle]

is there any write-up of how httptest tests work? asking because of my wondering how I'd add one.

[maelle]

Regarding the environment variable stuff. If I record the answer from an API with authentication, I want to use my real secrets for recording but when playing back I want to set up fake secrets so that the tests will run on contexts without access to secrets (forks, CRAN, etc.).

[codecov-io]

Codecov Report

Merging #48 (f2fa8cd) into master (541a48c) will not change coverage. The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master       #48   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           17        18    +1     
  Lines          447       451    +4     
=========================================
+ Hits           447       451    +4     

Impacted Files	Coverage Δ
R/mock-dir.R	100.00% <100.00%> (ø)

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[maelle]

(thanks for the notes on testing!)

[nealrichardson]

I'll take a look, and if I can come up with anything better for testing, I'll push a commit to your branch.

[nealrichardson]

I simplified the code a bit and likely broke the interactive use case, but I think that needs a more general solution (#50). I'll work on that next.

The other thing to do here is make a pass over the docs and make sure with_mock_dir is discussed everywhere it should be.

[maelle]

Thanks for the review & improvements!