Test htmx incident views

[stveit]

Scope and purpose

Fixes #1323.

Had troubles getting the Django test client stuff working, so this is example of how my tests look using RequestFactory and testing the views directly.

I have not yet figured out how to test htmx specific stuff, like first loading a page, then doing a htmx request to change only a portion of the site and assert that only that portion was updated.

The tests here are more normal tests, checking that values are correct for get requests, http codes, and that stuff is updated correctly in the database for create/update views. These tests are needed as well, but it doesnt really test the htmx functionality itself

This pull request

• adds/changes/removes a dependency
• changes the database
• changes the API

Contributor Checklist

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• Added a changelog fragment for towncrier
• Added/amended tests for new/changed code
• Added/changed documentation
• Linted/formatted the code with ruff and djLint, easiest by using pre-commit
• The first line of the commit message continues the sentence "If applied, this commit will ...", starts with a capital letter, does not end with punctuation and is 50 characters or less long. See our how-to
• If applicable: Created new issues if this PR does not fix the issue completely/there is further work to be done
• If this results in changes in the UI: Added screenshots of the before and after
• If this results in changes to the database model: Updated the ER diagram

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.47%. Comparing base (cea52c4) to head (70c714e).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1324      +/-   ##
==========================================
+ Coverage   78.76%   79.47%   +0.71%     
==========================================
  Files         141      141              
  Lines        5763     5763              
==========================================
+ Hits         4539     4580      +41     
+ Misses       1224     1183      -41     

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[hmpf]

Duration isn't styled properly yet so this is a temporary check. When it is styled properly I would like a generalized (ISO!) duration as well which can be used for checking the logic.