One component, upon which at many enterprise applications rely, is some form of database. It's often hard to get by without one or more, whether it's SQL, No SQL, or yet another technology. However, when you're unit testing such an application, you don't want to actually test against these real databases. For starters, this gives you a huge performance hit. For a few unit tests, this might not be noticeable. However, once you start getting hundreds of unit tests in a gated bu

Mocking is an essential component to any good unit testing strategy. It allows us to replace the concrete implementation of a class with a test version whose behavior you control. When designing a system from scratch, we can use dependency inversion to make sure everything is mockable. However, when working with an existing system, there may be hidden dependencies that require some creative thinking. I recently came across a situation where I needed to unit test some code tha