Writing Tests in Spring Boot

In the previous chapter, you have learned about the importance of loggers, their concepts, and how they can help developers debug and maintain applications. You have learned about Log4j2, which is a third-party framework for Spring Boot that offers several features such as Appenders, Filters, and Markers that can assist in making log events categorized and formatted for developers. We have also discussed SLF4J, which is an abstraction of logging frameworks that allows us to switch between different frameworks during runtime or at deployment, and lastly, we have implemented and configured the logging frameworks with XML configuration and Lombok.

This chapter will now focus on writing unit tests for our Spring Boot application; we will discuss the most commonly used testing frameworks with Java, JUnit, and AssertJ and implement them in our application. We will also be integrating Mockito with our unit test for mocking objects and services.

In this chapter...