Integration tests for components under islands

[nmashchenko]

Hey guys!

Wanted to check in as I wrapped up unit tests as planned originally and want to do some integration tests for islands folder and see if you would be interested in that. I can also do E2E and extend those you already have but since you are missing integration I wanted to make sure they can be useful first.

Let me know and excited to keep working & contributing to the repo!

[uzarubin]

Of course! The more tested the repo, the better. Island tests are especially needed.