Functions within one R file or separate (and associated tests)

[MeganBeckett]

Hi!

A question (and perhaps something to mention or clarify in the tutorial?), is in R package development, is it standard/better practice to have one R file per function?

I know that it's possible to put more than one function within a file, and I do this for related functions. But, what is bets practice?

And, if you do have multiple functions within one file, how does this work with the usethis workflow (ie. to add a new function to an existing file, rather than creating a new one?).

Then, in terms of Jim's section on writing unit tests, if you do have more than one function with an R file, I'm assuming you would also have all the tests for the various functions within one file? Or, is this not suggested?