@val_waeselynck: you can preload a db with schema and fixtures before all your tests and then retain that db as a global value. then you can use d/with on that in each test as you need, saving having to recreate the db from scratch for each test. should be stupid fast.

@robert-stuttaford: yes that's my objective the thing is, I want to get these benefits transparently when I'm using datomic.api/transact, hence a desire to mock the connection