Testing of independent parts - plugins

[Aiosa]

Hello,

Cypress is really a great tool, so far I've found everything and more than I needed. One thing I am wondering about is how to approach plugin testing:

Let's say your app has a plugins folder where you put all plugins integrated by your app. These plugins might be shipped directly via the plugins folder in the app repository, or added manually from different repositories - preferably clone into the plugins folder. How do I approach testing in this case? I can assume they have to use cypress of course, and I can pose almost arbitrary API decisions - but what is the most optimal approach? I would say having a test folder in each plugin folder, however, I did not find any hints on the config file parameters. Or have some build tool collect such folders and copy over to the main test folder?

Thanks for opinions!