We almost exclusively use cypress-testing-library to write our assertions. You're welcome to use them or not.

At Air, we try to avoid to duplicate coverage; however, we can't provide you the function we use to forcibly authenticate and avoid the login or registration process for inner-app tests. Unfortunately, that means you'll want to login or register before you can make in-app assertions.

We use real data in our integration tests, but you're welcome to use fixtures if that's what you're used to!