Skip tests on CRAN, but run locally

Question

It there an easy way to skip the execution of some tests in a package if the package is tested by CRAN? The background is, I like to have a lot of tests and in sum they are time

Answer 1

Use an environment variable, like testthat does:

skip_on_cran <- function() {
  if (identical(Sys.getenv("NOT_CRAN"), "true")) {
    return(invisible(TRUE))
  }

  skip("On CRAN")
}