Show HN: Xjs – Elixir syntax, JavaScript semantics (or transpilers made easy)

This is interesting, but come on, man. Not a single unit test? I found TDD to be invaluable when writing a simple RPN calculator (which suddenly became a Forth interpreter that could do things like compute factorial): https://github.com/pmarreck/elixir-snippets/blob/master/rpn_...

Note that I was never educated in how to write compilers or transpilers (I was a Psych major and merely a CS minor), I just looked at it as a transformation problem. :)