Set attach_testthat more selectively?

[MichaelChirico]

In a package using {tinytest}, attach_testthat=TRUE by default is a bit of a distraction.

Maybe attach_testthat = dir.exists(file.path(path, "tests", "testthat")) is better?

{tinytest} is not uncommon:

So another option is to cater specifically to tinytest: attach_testthat = !dir.exists(file.path(path, "inst", "tinytest"))

Or is this WAI and I just need to remember load_all(attach_testthat=FALSE) for such packages?

[MichaelChirico]

Added headache here:

I am developing package A. It caused a downstream breakage in package B.

To debug this, I do:

load_all("pkgA")
load_all("pkgB")

pkgA doesn't use {tinytest}; pkgB does.

But because of that, I need to include attach_testthat=FALSE in both invocations of load_all().