Check: for unstated dependencies in ‘tests’

unstated_deps.R

# When in your package in development


db <- tools:::.read_description("DESCRIPTION")
testdir <- "tests/testthat"
Rinfiles <- list.files(testdir, pattern = "\\.Rin$", full.names = TRUE)
Rfiles <- list.files(testdir, pattern = "\\.[rR]$", full.names = TRUE)
res <- tools:::.check_packages_used_helper(db, c(Rinfiles, Rfiles))
res
repos <- tools:::.get_standard_repository_URLs()
# This is not protected when no Internet connection is available
available <- utils::available.packages(repos = repos)

# This comes from 
debugonce(tools:::.check_packages_used_in_tests)
tools:::.check_packages_used_in_tests(dir = ".", testdir = "tests/testthat")

Have you face:

Version: 0.3.0
Check: for unstated dependencies in ‘tests’
Result: WARN
    Warning: unable to access index for repository https://bioconductor.org/packages/3.14/bioc/src/contrib:
     cannot open URL 'https://bioconductor.org/packages/3.14/bioc/src/contrib/PACKAGES'
    Warning: unable to access index for repository https://bioconductor.org/packages/3.14/data/annotation/src/contrib:
     cannot open URL 'https://bioconductor.org/packages/3.14/data/annotation/src/contrib/PACKAGES'
    Warning: unable to access index for repository https://bioconductor.org/packages/3.14/data/experiment/src/contrib:
     cannot open URL 'https://bioconductor.org/packages/3.14/data/experiment/src/contrib/PACKAGES'
Flavor: [r-oldrel-windows-ix86+x86_64](https://www.r-project.org/nosvn/R.check/r-oldrel-windows-ix86+x86_64/attachment-00check.html)

This is because the check verify that all dependencies called in your package are registered in DESCRIPTION.
If not, the check search if this package exist in any of the existing repositories to recommend to add it.

But when your package creates fake packages to test that it correctly works, then you may have problems with CRAN.

Indeed, if you're asked to do something to account for users who do not have an Internet connection, then, you can now say that this problem arise because maintainers of {tools} package did not accounted for users without Internet connection. These maintainers are the CRAN Team...