devtools::test() succeeds, while devtools::check() fails

> devtools::test()
Loading pcai.api
Testing pcai.api
✔ |  OK F W S | Context
✔ |   1       | test_model [0.4 s]

══ Results ═════════════════════════════════════════════════════════════════════════════════════
Duration: 0.4 s

OK:       1
Failed:   0
Warnings: 0
Skipped:  0

It succeeds, however when I run devtools::check():

── Test failures ───────────────────────────────────────────────────────────────── testthat ────

> Sys.setenv("R_TESTS" = "")
> library(testthat)
> library(pcai.api)
> test_check("pcai.api")
── 1. Error: Test if a model can be correctly loaded from AWS (@test_model.R#5)  ───────────────
cannot open the connection
1: source("plumber.R") at testthat/test_model.R:5
2: file(filename, "r", encoding = encoding)

══ testthat results  ═══════════════════════════════════════════════════════════════════════════
[ OK: 0 | SKIPPED: 0 | WARNINGS: 1 | FAILED: 1 ]
1. Error: Test if a model can be correctly loaded from AWS (@test_model.R#5) 

Error: testthat unit tests failed
Execution halted

1 error ✖ | 1 warning ✖ | 4 notes ✖

It fails because it cannot find the plumber.R file. But how am I supposed to access the functions of that file if this doesn't work? I am not too familiar with the R working directory.

1 Like

I think the issue might be that R CMD CHECK cannot find "plumber.R". Take a look if rprojroot::find_package_root_file() might be able to help you, and remember that stuff from the /inst dir gets moved to the package root on installation (so mypackage/inst/plumber.r becomes mypackage/plumber.r).

I tried rprojroot::find_package_root_file(), and it points to the right dir, however when using R CMD CHECK, it moves the tests to a new location. What is the correct way to access the plumber.R file from the test? The file structure is as follows:

├── tests/
│   └── testthat
│       ├── test_model.R
├── R/
│   └── plumber.R

I don't understand why you're calling source('plumber.R') from your tests. The package should be loaded and the functions defined in plumber.R can be called directly without having to source them.

1 Like

Wow. Thank you. I am not very familiar with R, so this is very good to know. It works now.

No worries. Most testing frameworks automagically do a significant chunk of work behind the scenes so you don't have to load all the stuff yourself. The easily found overview ( doesn't make it clear that your package is loaded before the tests are run.

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