[Rd] R test coverage

[Jim Hester]

It should be possible to use covr to do this, see this old issue
(https://github.com/r-lib/covr/issues/59). However interpreting the
results can prove challenging as naturally covr uses functions
from the base internally. Unfortunately the base and many of the
internal and recommended packages have somewhat bespoke installation,
so it would likely take some additional work on your end to get
reporting working. I had thought of doing this at one point, but
wasn't sure there would be any audience for the results, so did not
pursue it further.

For measuring coverage of the C code in the R runtime alone you could
use gcov and run the test suite, which depending on your contribution
may be the most informative route.

(replying for the list, accidentally replied only to Lluís the first time)

On Mon, Nov 27, 2023 at 10:15 AM Lluís Revilla <lluis.revilla using gmail.com> wrote:
>
> Hi all,
>
> I recently proposed a change in R that has led to the addition of new code
> to the R source code.
>
> The code added, as far as I know, has no tests and it might affect many
> packages in CRAN.
> I was wondering if adding a test would be helpful or it is already covered
> by some other test.
> Which brought me to the question: what is the coverage of R checks
> (check-devel)?
>
> My searches in the mailing list or other places didn't return anything
> close to it.
> But I am curious if someone has already done this and how.
>
> Many thanks,
>
> Lluís
>
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>
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