Run tests and next steps
Run the tests
$ ./mvnw test
Or with Gradle:
$ ./gradlew test
You should see the Postgres Docker container start and all tests pass. After the tests finish, the container stops and is removed automatically.
Summary
The Testcontainers library helps you write integration tests by using the same type of database (Postgres) that you use in production, instead of mocks or in-memory databases. Because you test against real services, you're free to refactor code and still verify that the application works as expected.
To learn more about Testcontainers, visit the Testcontainers overview.