AFAIK, we don't test UTF-8 or UTF-16 support for a variety of reasons (mostly because the file system itself should support it without issue). That said, given the wide range of possible file names these days, including file names with emojies it should be tested to ensure that this does in fact work as expected.

Another thing to note here is that the existing tests may blow up with these character sets and may need some adjustments like LANG=C.UTF-8 to ensure the environment is ready for UTF-8 support.

Thoughts?