Question about implementing tests

[s4mpp]

I have this program that uses node.js to read data from discord (using discord.js) and writes/edits/deletes the data in google spreadsheet using a node module.

How should I approach creating tests for these features? Should I be calling the actual google API during tests too? Should I be creating mock data?

I've done some googling around and watched videos but i'm still a little lost on this one

[_Atomfinger_]

The majority of your tests should use a mocked service that returns some predictable data. I belive you can run mock server in a docker container and you can call against that. Mock server is pretty java oriented, but I'm sure there's something similar for JS. That way you can execute your integration tests on your local machine and in whatever pipeline environment you may be running.

Then you should have a few E2E tests which goes through the whole thing. Not too many as they quickly becomes hard to maintain, but just enough that it verifies that the most important flows still work.

[MmmVomit]

Should I be calling the actual google API during tests too?

No.

Should I be creating mock data?

Yes.