Writing component tests for Kafka consumers

We have seen how easy it is to write concise and readable component tests for Kafka producers in the last article. In this installment, we will focus on the read-side and write component tests for a Kafka consumer. The example is centered around the same small lifecycle event service that we saw in the last article.

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Writing component tests for Kafka producers

Kafka for JUnit makes it easy to write integration tests for custom-built Kafka-enabled components as well as entire systems that integrate with a Kafka cluster. In the course of this article, I'd like to demonstrate how you can leverage this testing library to write whitebox tests for software components that integrate with Kafka. We'll start off with the write-path of a small lifecycle event service and implement a custom publisher on top of the Kafka Clients library that ought to be tested.

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Version 2.7.0 of Kafka for JUnit released

Version 2.7.0 of Kafka for JUnit has been released. It increases all Kafka dependencies to 2.7.0 and fixes a couple of minor SonarLint findings. It also improves API design when it comes to the configuration of the cluster as well as producing and consuming records (please consult the user's guide).

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Hi there! I'm Markus!

I'm an independent freelance IT consultant, a well-known expert for Apache Kafka and Apache Solr, software architect (iSAQB certified) and trainer.

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