Depending on your chosen platform and implementation model, keeping a domain core thoroughly tested and prepared for late-project changes can become tricky and cumbersome:
Tying your tests too closely to the implementation can make them brittle and costly to maintain, integrated tests are hard to change and keep useful - just to name a few common issues.

In this workshop, you will:
- Get a quick introduction to Outside-In TDD
- Test-drive an OO implementation of an aggregate and repository
- Learn when to mock and when to use collaborators
- Experience the effect of Tell-Don't-Ask
- Find out what happens when we introduce CQRS and EventSourcing

Prerequisites: A solid understanding of Java, JavaScript, or your favorite object-oriented programming language (though this may mean you will have to translate the examples, sorry), and a laptop with ready-to-work IDE.