Rewrite Tests in modern framework

[michael-markl]

Currently, we use Enzyme as our testing framework.
As Enzyme died by now, we need to move to a state-of-the-art testing framework.

[sarahsporck]

Are you working on this? I'd be open to implement this :)

[michael-markl]

I am not working on it.
I would consider it quite low priority to do this tbh, but if you want to, feel free to open a PR :)

If I remember correctly, the state logic of this component is quite complicated, so understanding the tests might not be super easy (also for me :D)