functions to get number of tests, passes, etc.

[nickrobinson251]

I found this useful for ReTestItems (e.g. https://github.com/JuliaTesting/ReTestItems.jl/blob/main/test/_integration_test_tools.jl#59), to tests the specifics of what happened when running a testset with multiple tests (similar to #2)

for failures and errors, this is just calling length on #2
but for passes we need to track that separately, since DefaultTestSet doesn't store Pass results (just a count of pass)

[nickrobinson251]

and related all*/any* helpers (any_errors(ts) -> Bool, all_passed(ts) -> Bool)

I've seen these kinds of helpers defined e.g. at https://github.com/RelationalAI/rai-test-julia/blob/a317c89c40472996a96bf4f6569029d40abf454f/src/testsets.jl#L105-L115 as well as at https://github.com/JuliaTesting/ReTestItems.jl/blob/498097bd04a9f890b8623c0d0857ab5dd534890d/test/_integration_test_tools.jl#L91

[sethaxen]

@nickrobinson251 could you put together a PR(s) with this and #2?

[nickrobinson251]

Yes, probably later next week

[sethaxen]

Great, thanks! In that case I think it makes sense to register the package now, hook it into ChainRulesTestUtils' test suite, and then make a breaking release if your PRs make breaking changes.

[nickrobinson251]

yeah, that makes sense to me - thanks!