tl;dr Since I embraced Domain-Driven Design, I didn't have to use any mock. When in 2011, during Java Developers Day in Kraków, Greg Young stated, that he does not use mocks, I couldn't believe him. I mean, come on! How do you test your code that is dependent on other parts of the code? I was at the very begining of my journey with Domain-Driven Design back then... Couple of days ago, I had to implement something in old part of the system. This part was developed like most systems were couple of years ago (and some are still) - with Anemic Entities and stateless, so called "Services". I didn't want to refactor this whole spaghetti around that place, so I decided to go with this anemic approach and "just be good enough". Since I am a big fan of Test-Driven Development (where it is valuable), I decided to write some test for this service that I was about to touch. Suprisingly, there was a test class for this service, and there were
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