SqliteDatabase.OpenDatabase Stub! Error

I've got a data repository class that I'm trying test in android studio. It's not executing in an emulator, it seems to be running locally. It's throwing an exception where the message is only "Stub!" What am I missing here? This code is in a library project, so I don't think I can push it to an emulator to test either.

The offending line of code:

SQLiteDatabase.openDatabase(this.path, null, SQLiteDatabase.OPEN_READONLY);

this.path is definitely a valid path on my drive.