I'm running my Micropub implementation against the official test suite at micropub.rocks. Despite the fact that I haven't implemented the entire specification (much less the extensions), my version already passes about a third of the test suite -- and a couple of the failed tests gave enough feedback to code fixes on the spot. Full steam ahead!
![Micropub.rocks test suite for creating a post via Micropub.](/static/2020-09-25-micropub-tests.png)