Messaging
Apache RocketMQ Testing: Unit Tests, Embedded Broker, and Testcontainers
```tldr Apache RocketMQ testing uses an embedded broker for fast unit tests and a real RocketMQ cluster via Testcontainers for integration tests. Key areas to test: normal producer/consumer flows, ordered messages, delay levels, transaction messages, and consumer group failover. ``` ```takeaways **Use rocketmq-test or an embedded broker for unit