Add approval tests

[antonpirker]

Problem Statement

The current test suite could be better. For preventing regressions, approval tests should be included. See here for what approval tests are: https://www.youtube.com/watch?v=wp6oSVDdbXQ

The approval tests should cover all the main functionality of all the integrations.

Solution Brainstorm

Implement approval tests like described in the video linked above.

[github-actions[bot]]

This issue has gone three weeks without activity. In another week, I will close it.

But! If you comment or otherwise update it, I will reset the clock, and if you label it Status: Backlog or Status: In Progress, I will leave it alone ... forever!

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"A weed is but an unloved flower." ― Ella Wheeler Wilcox 🥀

[antonpirker]

Tests are ok now, so I am closing this for now.