Testing is a cornerstone of any application lifecycle. Integration testing is a type of testing that helps to ensure that an application is functioning correctly with all of its external services, such as a database, authorization server, message queue, and so on. With Testcontainers, creating such an environment for integration testing becomes easier. However, setting just the environment is not enough for proper testing. Preparing test data is also an essential task. In this article, we will review the process of preparing application business logic tests. We will see how to set up Testcontainers for the application and explain some challenges we can meet during test data preparation.
This article also has a companion video that guides you through the process of application testing with Testcontainers and JPA Buddy.