R Under development (unstable) (2025-11-27 r89071 ucrt) -- "Unsuffered Consequences"
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Platform: x86_64-w64-mingw32/x64

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> library(testthat)
> library(GetoptLong)
> 
> is.solaris = function()
+ 	grepl('SunOS',Sys.info()['sysname'])
> 
> 
> if(!is.solaris()) {
+ 	if(Sys.which("perl") != "") {
+ 		test_check("GetoptLong", filter = "qq|GetoptLong")
+ 	} else {
+ 		test_check("GetoptLong", filter = "qq")
+ 	}
+ }
Error: `tag` is mandatory
Usage: Rscript foo.R [options]

Options:
  --tag, -t integer
    tag
 
  --help, -h
    Print help message and exit.
 
  --version, -v
    Print version information and exit.
 
[ FAIL 0 | WARN 0 | SKIP 0 | PASS 173 ]
> 
> proc.time()
   user  system elapsed 
   2.17    0.62   52.18