R Under development (unstable) (2024-05-22 r86590 ucrt) -- "Unsuffered Consequences"
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Platform: x86_64-w64-mingw32/x64

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> source("helper/helper.R")
> 
> if (exists("dir.exists", envir = baseenv())) {
+   f = get("dir.exists", envir = baseenv())
+   expect_same = makeCompareFun(f, backports:::dir.exists)
+ 
+   expect_same(tempdir())
+   expect_same(tempfile())
+   expect_same(rep.int(tempdir(), 2))
+   expect_same(TRUE)
+ }
> 
> proc.time()
   user  system elapsed 
   0.28    0.03    0.29