Print an account of test statuses

[topepo]

When running R CMD check it would be good to know how many tests were skipped even if there are no failures.

[gaborcsardi]

This is more of an issue for rcmdcheck I think.

[jennybc]

Specifically, I'd rejoice if this:

* checking tests ...
  Running ‘testthat.R’
 OK

got an upgrade to include more of this:

══ Results ══════════════════════
Duration: 14.7 s

OK:       390
Failed:   0
Skipped:  3

[gaborcsardi]

OK, so this is actually a bit more involved, because parsing this information from the test results is not reliable, it depends on the reporter you are using.

Ideally, we would get the results directly from testthat, as an R object: https://github.com/r-lib/testthat/issues/875

Until that is done, I'll have to postpone this.

[hadley]

Can we easily add extra data here? Maybe this should be done more from the testthat side? (i.e. what could test_check() emit to display extra info here?)

[gaborcsardi]

I think that with the printing of the test results on GHA (and optionally locally as well), this is not so important any more. Locally you can always look at the .Rout file if you are interested. No?

[gaborcsardi]

OTOH, we could still add some reporting to testthat, I think that would open up some new possibilties. E.g. testthat could write a summary of the results to a file in some format, if an env var is set?

[hadley]

I think this is really just a duplicate of #121

[gaborcsardi]

Yeah, I closed that one, this one is older and has more participants.

[hadley]

I think this is still important; it'd be really nice to be able to see the number of skipped tests without having to dig down further.