I've made a separate repository for it because it's quite large (>30 Mb). You might decide (as I did) that keeping the test suite with the rest of the code is worth the extra size.
(The other advantage of a separate repository, of course, is that you can easily test against older versions of CXML.)
@ruricolist made his test suite available in a separate repository:
Originally posted by @ruricolist in https://github.com/sharplispers/cxml/pull/3#issuecomment-425247421