Here are some test cases for database abstraction as described in Database abstraction with google apps script
The library reference is
Mj61W-201_t_zC9fJg1IzYiz3TLx7pV4j
Once you have set up your environment you can use these test cases to try it out. Tests here are for a few different back-ends. Just modify to try out the one you are planning to use.
The code I used at the time of writing this is now deprecated. Please refer to here for GoA
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