https://github.com/rcardin/kafka-testing

Kafka Unit Testing Usine Spring Kafka and MockConsumer/MockProducer Classes
https://github.com/rcardin/kafka-testing

kafka spring-kafka unit-testing

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Kafka Unit Testing Usine Spring Kafka and MockConsumer/MockProducer Classes

• Host: GitHub
• URL: https://github.com/rcardin/kafka-testing
• Owner: rcardin
• Created: 2022-10-04T20:03:29.000Z (over 2 years ago)
• Default Branch: master
• Last Pushed: 2022-10-06T19:49:38.000Z (over 2 years ago)
• Last Synced: 2024-11-17T12:28:40.893Z (3 months ago)
• Topics: kafka, spring-kafka, unit-testing
• Language: Java
• Homepage:
• Size: 4.88 KB
• Stars: 1
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Kafka Unit Testing using Spring Kafka and `MockProducer`/`MockConsumer` Classes

Inside the Kafka library, there are two mock implementation of the `Consumer` and

`Producer` interfaces. These classes are `MockConsumer` and `MockProducer`. These classes are

useful for unit testing Kafka consumers and producers. Please, refer to the official documentation

to understand how to use them in the wild:

* [How to build your first Apache KafkaProducer application](https://developer.confluent.io/tutorials/creating-first-apache-kafka-producer-application/confluent.html)

* [How to build your first Apache KafkaConsumer application](https://developer.confluent.io/tutorials/creating-first-apache-kafka-consumer-application/confluent.html)

The [Spring Kafka](https://docs.spring.io/spring-kafka/docs/current/reference/html/) project is a

great library to build client application using abstraction of the

Kafka consumers and producers managed by Spring. It abstracts the producer using a `KafkaTemplate` type

, and the annotation `@KafkaListener` to consume messages from a topic.

Can we use the `MockConsumer` and `MockProducer` classes with Spring Kafka? The answer is yes, and

this is what this project is about.

Please, refer to the `src/test` folder to see how.

Is the use of the `MockConsumer` and `MockProducer` classes with Spring Kafka a good idea? Well, I

don't think so. In the case of the consumer, we can call the method annotated with `@KafkaListener` 

directly. Otherwise, in the case of the producer, we can use the `KafkaTemplate` type to 

create a mock using Mockito, or some other mocking framework.

🤷‍♂️