R package tests are not found when running R CMD check

Question

I am using the testthat package to write tests for my R package. I have followed the instructions at http://r-pkgs.had.co.nz/tests.html (I believe). I used

devtools::use_testthat()

to set up the testing skeleton. I have created a test file in tests/testthat and the filename begins with test. When I run devtools::test() or Ctrl+Shift+T in RStudio, the tests run successfully, however when I run R CMD check or Ctrl+Shift+E, testthat cannot find my package. I get the error

> library(testthat)
> 
> test_check("foo")
Loading required package: foo
Error in loadNamespace(name) : there is no package called 'foo'
Calls: test_check ... tryCatch -> tryCatchList -> tryCatchOne -> <Anonymous>
In addition: Warning message:
In library(package, lib.loc = lib.loc, character.only = TRUE, logical.return = TRUE,  :
  there is no package called 'foo'
Execution halted

I do modify my library path by setting R_LIBS_SITE in my .Renviron file. I suspect that this is not being read when running R CMD check, but I don't think that it should make a difference.

When I run devtools::check() from the RStudio Console, it completes successfully (including tests), however running Check in RStudio fails.

I added some debugging to testthat.R to print out .libPaths() and other bits:

> library(testthat)
> .libPaths()
[1] "C:/Users/timk/AppData/Local/Temp/Rtmp841w0b/RLIBS_1790551706"
[2] "C:/Program Files/R/R-3.2.2/library"
> list.files(.libPaths()[1])
 [1] "KernSmooth" "MASS"       "Matrix"     "boot"       "class"
 [6] "cluster"    "crayon"     "digest"     "foo"        "foreign"
[11] "lattice"    "magrittr"   "memoise"    "mgcv"       "nlme"
[16] "nnet"       "praise"     "rpart"      "spatial"    "stringi"
[21] "stringr"    "survival"   "testthat"
> list.files(file.path(.libPaths()[1], "foo"))
character(0)
> list.files(file.path(.libPaths()[1], "testthat"))
 [1] "CITATION"    "DESCRIPTION" "INDEX"       "LICENSE"     "MD5"
 [6] "Meta"        "NAMESPACE"   "R"           "help"        "html"
[11] "libs"

You can see that the package directory is created in the temporary library, however the package is empty. Compare it with the file list for testthat.

I have also tried downloading another package that uses testthat (anonymizer) and am getting the same error.

sessionInfo():

R version 3.2.2 (2015-08-14)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 8 x64 (build 9200)

locale:
[1] LC_COLLATE=English_Australia.1252  LC_CTYPE=English_Australia.1252    LC_MONETARY=English_Australia.1252
[4] LC_NUMERIC=C                       LC_TIME=English_Australia.1252    

attached base packages:
 [1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
 [1] foo_0.1  testthat_0.11.0

loaded via a namespace (and not attached):
 [1] magrittr_1.5   tools_3.2.2    roxygen2_5.0.0 Rcpp_0.12.1    crayon_1.3.1   memoise_0.2.1  stringi_1.0-1 
 [8] stringr_1.0.0  digest_0.6.8   devtools_1.9.1

Answer 1

Try adding testthat in the Suggests: field of DESCRIPTION. R CMD CHECK will only put in scope the packages mentioned in that file during a check.