How do I test my custom service-worker code

[CodingDive]

Hey, thank you for the great addons.
I wrote some logic inside the service-worker folder and now want to test it.
My first question is if it is possible to write unit tests for functions. After the build process I can no longer import and execute functions from my tests since they are bundled inside the sw.js file. Is there maybe a way to execute tests in the context of the service-worker or any other workarround?
What about integration tests? According to this medium post there seems to be a lot of ways to write integration tests. Is there any preferred way for this addon?

Thank you in advance