The new version of mockito comes with a new method: spy. Very useful feature but... bad name!
The mockito's "mock" method creates already a spy object. The "spy" method creates a "proxy" or "proxy spy" object. Totally confusing, isn't it?
The "mock" method is not really awful, because you can also use the double as a mock or just a stub, and it is common to use the name "mock" for all kind of doubles, although still confusing. The benefit from naming the double properly is that it helps programming by intention, which is a big part of Test Driven Development.
I would rename "mock" to "double" and "spy" to "proxy". Anyway, don't forget that, when using the mockito's "spy" method any single call that you don't explicitly stub, will reach the actual object. It is really useful to work with legacy code, in fact, we implemented it in pyDoubles, but using the method "proxy_spy".
Just make sure you understand what kind of test double you use and why. That is what matters in the end 🙂