I’ve been meaning to write this article for a long time and, finally, here it is: the topic of domain model purity versus domain model completeness.

This post is about where to put the equality comparison logic: under the test or production code.

How to unit test an abstract class? Or a whole class hierarchy that depends on that abstract class? Let’s see.

In this post, we’ll make a deep dive into the DRY and DAMP principles and will talk about the false dichotomy around them.

Need to change validation rules but have pre-existing data that doesn’t follow the new rules? In this post, we’ll talk about how to do that properly.