Working directory inside with_dir/local_dir does not match provided new directory

[solmos]

When using with_dir() or local_dir(), I find that the new working directory within these functions do not exactly match the provided path to the new argument.

Reproducible example:

my_dir <- tempdir()
withr::with_dir(my_dir, {
  print(my_dir)
  print(getwd())
  my_dir == getwd()
})
#>[1] "/var/folders/gx/vdqbfzvs66b1swy4qv7pch7c0000gp/T//RtmpyNFcnx"
#>[1] "/private/var/folders/gx/vdqbfzvs66b1swy4qv7pch7c0000gp/T/RtmpyNFcnx"
#>[1] FALSE

Is this the expected behaviour?

> sessionInfo()
R version 4.2.2 (2022-10-31)
Platform: aarch64-apple-darwin20 (64-bit)
Running under: macOS Ventura 13.2.1

Matrix products: default
BLAS:   /Library/Frameworks/R.framework/Versions/4.2-arm64/Resources/lib/libRblas.0.dylib
LAPACK: /Library/Frameworks/R.framework/Versions/4.2-arm64/Resources/lib/libRlapack.dylib

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

loaded via a namespace (and not attached):
[1] compiler_4.2.2 tools_4.2.2    withr_2.5.0   

[hadley]

This appears to be a "feature" of setwd()/`getwd():

tempdir()
#> [1] "/tmp/RtmpDe7XOY"

setwd(tempdir())
getwd()
#> [1] "/private/tmp/RtmpDe7XOY"

^{Created on 2024-01-09 with reprex v2.0.2.9000}

In general, if you're trying to compare directory names, you should call normalizePath() on them:

normalizePath(tempdir())
#> [1] "/private/tmp/RtmpPlKlm9"

setwd(tempdir())
normalizePath(getwd())
#> [1] "/private/tmp/RtmpPlKlm9"

^{Created on 2024-01-09 with reprex v2.0.2.9000}