4 make a unit test

[edelarua]

@gmbecker I made a unit test for the subjid_func function to review. I'm not sure if there's a reason why the test.R file was commented out so I left it how it was.

close #22

[gmbecker]

@edelarua looks like the change to devel = TRUE when calling pkgdown::build_site is causing the job to fail because the package is no longer getting installed, which building the vignettes obviously requires. Please revert that and see if you can get it passing the checks again with the rest of your changes.

It is a pretty big fail on pkgdown's part that it provides an option that will just fail like that, but 🤷

[gmbecker]

@edelarua sorry I didn't see your previous comment sooner, but we do need the tests to be uncommented, they won't run (or do anything) as they are now. Please uncomment them, make sure they pass for you locally, and then update the pull request

[edelarua]

@gmbecker everything seems to be passing again after turning off developer mode in the circleci config file - thanks!