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Testing Micronaut Kafka Listener using Testcontainers

Learn how to create a Micronaut application with a Kafka listener that persists data in MySQL, then test it using Testcontainers Kafka and MySQL modules with Awaitility.

Java Testing with Docker

25 minutes

1

Create the project

2

Write tests

3

Run tests

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Run the tests ​

console
$ ./mvnw test

Or with Gradle:

console
$ ./gradlew test

You should see the Kafka and MySQL Docker containers start and all tests pass. After the tests finish, the containers stop and are removed automatically.

Summary ​

Testing with real Kafka and MySQL instances gives you more confidence in the correctness of your code than mocks or embedded alternatives. The Testcontainers library manages the container lifecycle so that your integration tests run against the same services you use in production.

To learn more about Testcontainers, visit the Testcontainers overview.

Further reading ​