To check the existence of a suggested package it is recommended to use
requireNamespace("suggested", quiet = TRUE). See the solution for
examples on the CRAN cookbook [1].On tests, it depends on the approach you use. It seems that you don't use any testing package for it (tinytest, testthat, ...). I think you could rely on the actual objects and not compare with a saved output of tests. Instead of: > obj [1] "test1" Use something like in a plain R file: stopifnot(identical(obj, "test1")) This is how it is done on base R itself that checks if MASS is installed and performs some checks conditionally. See example on a mirror: [2]. Hope this helps, Lluís [1]: https://contributor.r-project.org/cran-cookbook/general_issues.html [2]: https://github.com/r-devel/r-svn/blob/fb206acc9f17c30d91c528efca9a368c69d5015b/src/library/stats/tests/ig_glm.R On Fri, 1 Aug 2025 at 15:23, Jon Olav Skoien <jon.sko...@gmail.com> wrote: > > One of my packages failed the noSuggests test, and needs to be > updated. Fair enough, a suggested package was used unconditionally > both in an example and in a test. From what I understood, a solution > is to wrap this part of the code inside > if (require("suggestedPackage")) {useSuggestedPackage} > However, it still fails the noSuggests test, this time because the > output does not match the test.Rout.save-file. This is also clear, as > some of the code is not executed, and some output is missing. > > How do I get around this? > I could use ## IGNORE_RDIFF_BEGIN and ## IGNORE_RDIFF_END before and > after the if (require()) clause, but then this part would not be > tested when the suggested package is available either. I don't like > this solution, as it means the interaction between the two packages > will not be checked. > > Am I missing something? Is there a different way of conditionally > using the suggested package? Or do I have to use the IGNORE_RDIFF > method? > > Thanks, > Jon > > ______________________________________________ > R-package-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-package-devel ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel
