Implementing test cases for turning request state into mapping

[PerumallaGiridhar]

Summary

This PR increases test coverage around request.state typing usage
No documentation update is needed for this PR

Checklist

• I understand that this PR may be closed in case there was no previous discussion. (This doesn't apply to typos!)
• I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
• I've updated the documentation accordingly.

[Kludex]

I'll add you a coauthor in the other PR and apply your changes, thanks.