[Ataraxy]

So I'm not an expert, but for simplistic use cases I merely make use of https://github.com/oguimbal/pg-mem

It's a lot faster and easier than dealing with containers and the like.

[cgh]

Same except we use a different in-memory database (H2). This makes it simple for CI systems like Jenkins to run the tests and you can have various degrees of integration. Really amazing that your comment was the first mention I saw of in-memory databases in this thread.