We have once again covered a lot of territory. Unit testing is a critical part of enterprise application development, and the combination of NetBeans, Maven, JUnit, and Spring provides us with a solid platform to launch both automated and single file test cases. Writing comprehensive test cases is an art form that is always appreciated and valued in any high-quality development team; never underestimate the confidence gained from working with well-tested code with a solid suite of test cases!

In the next chapter, we will examine the role of the service layer in enterprise application development. Our 3T business logic will then be implemented using the Data Transfer Objects (DTO) design pattern.