Expand frontend unit tests

[akrguda]

Please describe personrole, thema and benefit. Please describe DoR, Aca, Dod

[Ayerbe88]

As a developer the unit tests in all different front end modules (main App plus webcomponents). To have unit tests and have enough coverage for them to be used in the build pipeline process.

Acceptance critera:

• [ ] The unit tests are developed in each module
• [ ] Each module has a coverage of at least 80%
• [ ] Frontend build pipeline includes checking unit tests and coverage

Dod:

• [ ] Unit test results ca be seen in pipeline
• [ ] The documentation about unit testing in each of the different frontend technologies is up to date

[akrguda]

Daniel and Cristian talked about this ticket which was assigned orgial to Cristian. Cristian is leaving the projet at 29.12.2022 and this ticket can not be done by him till then. So, the assigment was removed by Daniel and a new "assignee" got to be found when the time is ready to do it.

Cristian thins by the way, that we already have some frontend unit tests and this ticket may not have the same priority for to solve till end of february. Maybe it can be moved to the state "to do".

@LanaKast @TimmyAeberli