This isn't a fault in #vertx nor in #mockist approaches, this is a paradigm mismatch.

It would be foolish for me to go out and then write articles about how mockist thinking falls apart because it is difficult in vertx. It would also be foolish for me to judge vertx harshly for not thinking in my preferred paradigm.

Better to learn and adapt.

I am less tolerant of more generalist libraries (*cough* guava *cough*) not playing nicely here, but that's because those _should_ be fairly generic.

Cool article on #testing by #martinfowler. It covers the difference between various test doubles (such as #stubs and #mocks) and various testing styles (such as classic #tdd or #mockist tdd):

https://martinfowler.com/articles/mocksArentStubs.html