Writing a test
In this section, we will now start writing our unit tests in our Spring Boot application. As we go back to our application, the services and repository are the essential parts of our application where we need to implement unit tests, as the services contain the business logic and can be modified often, especially when new features are added. The repository includes methods for CRUD and other operations.
We will be implementing two approaches in writing our unit tests. The first method is using an in-memory database such as H2 to store our created data when running unit tests. The second method is mocking our objects and repository using the Mockito framework.
Testing with the H2 database
The first approach that we will implement in writing our tests is using JUnit and AssertJ with the H2 database. The H2 database is an in-memory database that allows us to store data in the system memory. Once the application is closed, it will delete all the stored data. H2...
