Just found the #TestContainers project:

testcontainers.com

> Unit tests with real dependencies. Testcontainers is an open source framework for providing throwaway, lightweight instances of databases, message brokers, web browsers, or just about anything that can run in a Docker container.

news.ycombinator.com/item?id=3

Heads up to the #ActivityPub test suite projects. This may be interesting.

@activitypubtestsuite

I updated the test feedback wiki on #SocialHub: socialhub.activitypub.rocks/t/