In a new post on his blog Senior CEO Frederick Vanbrabant explains the Integration Operation Segregation Principle, which is programmerspeak for splitting your code into nice little testable bits.

As you can see the Integration Operation Segregation Principle is just a long and complicated term to describe something very simple. This all might seem like a lot of work, but it’s worth it. Your code and especially your tests will thank you later

https://frederickvanbrabant.com/post/2018-10-08-integration-operation-segregation-principle/