You can write better controllers by adhering to the best practices. So-called “thin” controllers—i.e. controllers with less code and fewer responsibilities—are easier to read and maintain. And once your controllers are thin, you might not need to test them much. Rather, you can focus on testing the business logic and data access code. Another advantage of a thin or lean controller is that it is easier to maintain multiple versions of the controller over time.
This article discusses bad habits that make controllers fat and then explores ways to make the controllers lean and manageable.
