R Under development (unstable) (2023-08-28 r85029 ucrt) -- "Unsuffered Consequences"
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Platform: x86_64-w64-mingw32/x64

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> library(testthat)
> library(usefun)
> 
> test_check("usefun")
[ FAIL 0 | WARN 0 | SKIP 0 | PASS 171 ]
> 
> proc.time()
   user  system elapsed 
   1.43    0.10    1.48