if (requireNamespace("tinytest", quietly=TRUE) &&

utils::packageVersion("tinytest") >= "1.0.0") {

## Set a seed to make the test deterministic

set.seed(42)

## R makes us to this

Sys.setenv("R_TESTS"="")

## Force tests to be executed if in dev release which we define as

## having a sub-release, eg 0.9.15.5 is one whereas 0.9.16 is not

if (length(strsplit(packageDescription("Rcpp")$Version, "\\.")[[1]]) > 3) { # dev rel, and

if (Sys.getenv("RunAllRcppTests") != "no") { # if env.var not yet set

message("Setting \"RunAllRcppTests\"=\"yes\" for development release\n")

Sys.setenv("RunAllRcppTests"="yes")

}

}

## On Travis also always set tests; see

## https://docs.travis-ci.com/user/environment-variables/#default-environment-variables

if ((Sys.getenv("CI") == "true") ||

(Sys.getenv("TRAVIS") == "true") ||

(Sys.getenv("CONTINUOUS_INTEGRATION") == "true")) {

if (Sys.getenv("RunAllRcppTests") != "no") { # if env.var not yet set

message("Always enabling \"RunAllRcppTests\"=\"yes\" on Travis\n")

Sys.setenv("RunAllRcppTests"="yes")

}

}

## there are several more granular ways to test files in a tinytest directory,

## see its package vignette; tests can also run once the package is installed

## using the same command `test_package(pkgName)`, or by director or file

tinytest::test_package("Rcpp", ncpu=getOption("Ncpus", 1))

}