Fongo is an in-memory fake implementation of MongoDB. It's an interesting alternative backend for testing an OGM application targetting MongoDB.

The required changes should be minimal; The MongoDBDialect should work as is (provided Fongo does implement everything we need), only a new provider class would be needed (or the existing one to be updated to support both backend types).

Forum reference: https://forum.hibernate.org/viewtopic.php?f=31&t=1037889