R Under development (unstable) (2024-03-03 r86036 ucrt) -- "Unsuffered Consequences"
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> if (require(testthat)) {
+   library(rgl)
+   options(rgl.useNULL = TRUE)
+   test_check("rgl")
+ } else
+ 	warning("'testthat' package is needed for tests")
Loading required package: testthat
[ FAIL 0 | WARN 0 | SKIP 0 | PASS 38 ]
> 
> proc.time()
   user  system elapsed 
   1.12    0.20    1.32