Add vitest

[hwinther]

Add vitest, workflow reporting of test results and coverage, and one basic test + mocks to get it running

Description 💬

Motivation and Context 🥅

How has this been tested? 🧪

• Local build ⚒️
• Local tests 🧪
• (optional) Local run and endpoint tested in swagger 🚀

Screenshots (if appropriate) 💻

Types of changes 🌊

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist ☑️

• The pull request title starts with the jira case number (when applicable), e.g. "TEST-1234 Add some feature"
• The person responsible for following up on requested review changes has been assigned to the pull request
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.

Highly optional checks, only use these if you have a reason to do so ✔️

• This PR changes the database so I have added the create-diagram label to assist reviewers with a db diagram
• This PR changes platform or backend and I need others to be able to test against these changes before merging to dev, so I have added the deploy-azure label to deploy before merging the PR

Checklist for the approver ✅

• I've checked the files view for spelling issues, code quality warnings and similar
• I've waited until all checks have passed (green check/without error)
• I've checked that only the intended files are changed

[github-actions]

frontend

✅ Build successful

✅ No linting issues 🎊

[github-actions]

Todo Commenter

.github/actions/frontend-build/action.yml

TODO:

• ,FIXME:,BUG:" Line: 150

FIXME:

• ,BUG:" Line: 150

BUG:

• " Line: 150

src/frontend/src/mock.ts

TODO:

• can be used to mock the API during development Line: 1

src/frontend/src/test/testUtils.tsx

TODO:

• also remove it afterAll Line: 41

---

@hwinther Please take a look 👀

[github-actions]

Package	Line Rate	Branch Rate	Health
frontend	0%	100%	❌
frontend.src	0%	0%	❌
frontend.src.api.endpoints.blogging	17%	0%	❌
frontend.src.api.endpoints.send-message	20%	0%	❌
frontend.src.api.endpoints.service	65%	22%	➖
frontend.src.api.endpoints.weather-forecast	91%	50%	✔
frontend.src.api.mutators	86%	100%	✔
frontend.src.pages._error	0%	0%	❌
frontend.src.pages.about	100%	100%	✔
frontend.src.pages.blogs	0%	100%	❌
frontend.src.pages.blogs.@id	0%	0%	❌
frontend.src.pages.index	78%	100%	➖
frontend.src.renderer	0%	0%	❌
frontend.src.test	88%	50%	✔
Summary	31% (97 / 310)	8% (12 / 160)	❌