> The support for messaging tests was immature in the JVM implementation: most of the critical interactions between our microservices occurs through Kafka messa

> The support for messaging tests was immature in the JVM implementation: most of the critical interactions between our microservices occurs through Kafka messages (we favor mutations in asynchronous flows while HTTP calls are mostly reserved for read-only operations). Trying to wrap my head around what is meant by that. I mean I get the second half, but the first half not so much.