Feature Request: Unit Test

[wSedlacek]

While Muuri is an upstream project and should be responsible for it's own unit test I believe that integration test would still be very valuable.

Additionally a sample project may be useful for developers to be able to quickly test changes they make in a live environment.

[wSedlacek]

I'm going to start working on this issue when I get a chance. Might be a week or so before I have a PR ready.

[dennisameling]

@wSedlacek Thanks for the suggestion and for working on this! I'll check if I can make some time to look into the other feature requests in the coming 2 weeks 🚀