Replace testcontainers with "something else"?

[erikgb]

I think the testcontainers tests are slow, and we will also be affected by the DockerHub rate limits. There are some suggestions in testcontainers/testcontainers-java#3099, but I personally think we could/should test this without containers. What about an in-memory embedded broker?

[sverrehu]

I have the code ready now, just need to figure out how to release a jar file. But that must be another day.

[erikgb]

Why don't we use an embedded Kafka broker created and maintained by someone else?

[sverrehu]

Those I found were either not updated for years, or delegated the embedding to testcontainers.

At least I had fun creating my little project, which I think is the absolute minimum required to embed a Java server. Including formatting the Kafka log directory (required for KRaft) without running an external command.