[libcxx-commits] [libcxx] Update testing documentation with testing guidelines. (PR #87928)

[Louis Dionne via libcxx-commits]

https://github.com/ldionne commented:

Thanks a lot for writing this, I think it makes a lot of sense and it can provide a place to point out to when suggesting changes to a test. Hopefully this can aid in creating a shared set of values and a shared understanding of how we write tests in libc++.

https://github.com/llvm/llvm-project/pull/87928