Yeah, when not hitting any DB, you're not testing runtime with ORMs. Got bit by that.
.net Entity Framework has this problematic limitation that you can't check if SQL queries will be properly built without DB - example situation is if you're trying to use not mapped .net method in your SQL-targeting queries. That's a runtime error you can't (yet) test without DB.
I'm cautious enough to believe other ORMs may have similar quirks, only testable with something to query on.
.net Entity Framework has this problematic limitation that you can't check if SQL queries will be properly built without DB - example situation is if you're trying to use not mapped .net method in your SQL-targeting queries. That's a runtime error you can't (yet) test without DB.
I'm cautious enough to believe other ORMs may have similar quirks, only testable with something to query on.