Documentation error and issue with cleaning up files after testing

[mattwarkentin]

Hi,

I think there is an issue with the documentation shown here: https://testthat.r-lib.org/articles/test-fixtures.html#package

Source code here:

testthat/vignettes/test-fixtures.Rmd

Lines 317 to 323 in 24ff6c0

	```{r, eval = FALSE}
	# Run before any test
	write.csv("mtcars.csv", mtcars)
	# Run after all tests
	withr::defer(unlink("mtcars.csv"), teardown_env())
	```

The arguments are backwards for write.csv(). Moreover, I don't know that the suggested pattern works anyway for cleaning up files. At least I am unable to reproduce the desired behaviour. See the post here for a more complete real-world example: https://forum.posit.co/t/cleaning-up-temporary-files-after-testing-not-working-as-expected/196516