[R-pkg-devel] Skipping tests on CRAN

Am 21.04.21 um 08:35 schrieb Mark van der Loo:

Hi Ott,

There is no documented way to detect whether you are running on CRAN. So
there is nothing to rely on, on that side.

You can only make your own machine detectable by the test code. For

example

by setting an environment variable that identifies your machine and make
test execution depend on the value of that environment variable. This is
what tinytest does under the hood.

You could add the following at the start of a script containing slow tests:

if (!identical(Sys.getenv("NOT_CRAN"), "true")) {
    message("skipping slow tests")
    q("no")
}
## slow tests follow here ...

Of course, you could use a different name for the environment variable,
e.g., "R_PKGNAME_ALL_TESTS", or test with as.logical() to allow both
"TRUE" and "true" values:

if (!isTRUE(as.logical(Sys.getenv("R_PKGNAME_ALL_TESTS")))) q("no")

Quitting from test scripts as above is frequently used in R's own test
suite, for example in the regression tests for message translations:

if (!capabilities("NLS")) {
    message("no natural language support")
    q("no")
}

Don't run such code in an interactive session if you don't want to quit
R. ;)

An alternative is the R CMD check --test-dir=inst/slowTests approach
mentioned in the WRE manual at

https://CRAN.R-project.org/doc/manuals/r-devel/R-exts.html#Checking-packages
.

Best regards,

        Sebastian

Best,
Mark





On Wed, Apr 21, 2021 at 7:17 AM Ott Toomet <otoomet at gmail.com> wrote:

Hi packagers,

what is the best way to skip certain tests on CRAN?  So far I have

included

certain test files in .Rbuildignore and run the tests on the package
directory.  But now when moving to Authors at R format, I get errors about
missing maintainer etc.

I know there are options in testthat, tinytest and such, are these the

best

options with least dependencies and assumptions built in?

I sort of remember something in base R but cannot find anything when
looking for it now.

Cheers,
Ott

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