[Docs] Show examples of unit testing with Drivine

It would be great to have some documentation available to show how to unit test with Drivine. The docs show how to perform end2end tests. It does not show how to get the injected PersistenceManager from the testing module, provide mock implementations, or spy on its methods.

An option would be to automatically mock the entire Drivine module: jest.mock("@liberation-data/drivine"), but this causes very vague errors regarding decorators.

How would we go about this?

[jasperblues]

Yes it depends what you’re looking for, but its very cool when it matches.

I plan to add GraphQL features to Drivine in future. (Will work with any cypher compatible graphDB).

[NilsMoller]

Looking at the repositories (which is what I call services), you don’t unit test them. You (as you mentioned) integration test them (sort of, there is no asserting in the sample repository). How do you know the database has been called with the correct arguments? Transform it to the correct results (e.g. when using map)? How do you verify the repository works as expected when the database connection fails?