restore helm unittests

[MichaelSp]

For some reason the unit-tests are quite outdated and are not working anymore. This PR restores the unittests and provides a GitHub Actions workflow to run it on PRs

[cfis]

Cool - happy to have a PR that fixes unit tests, but this PR also includes other additional changes. Could you separate those out?

Also, what does the __snapshot__ directory do and why the snap file extension after yaml?\

[MichaelSp]

Additional changes? You mean fixes in deployment.yaml and typos in values.yaml?

the snapshots will be the generated version that defines the current truth. If you plan to change anything that would change the output, the test will fail because it might be a regression. You can now review the changes in the output of the helm untittest run and decide if you want it or not. If you want to continue with the changes you can run helm unittest -u to update the snapshots. The files will also be commited in to the repo. The yaml.snap files are auto-generated by the tests.
All of that is documented in https://github.com/helm-unittest/helm-unittest

[cfis]

Yes, I would like an PR that only contains the changes needed for updating the unit tests. Other changes we can talk about in separate PRs.

Thanks for the explanation on snapshots, that sounds good.

[cfis]

Just following up - would like to get this merged.

[cfis]

Ping?

[polarathene]

Sorry this is a bit off-topic, but just curious @MichaelSp , is SAP using DMS? :)

[MichaelSp]

Sorry for the delay here. I couldn't find the time yet to split the PR and timewise it doesn't seem to get any better... (maybe you can accept it in one PR?)

@polarathene AFAIK they are not using DMS 🤣

[cfis]

@MichaelSp understood - if I find some time I'll see what I can do.

[MichaelSp]

Finally I was able to polish this PR a bit. One thing I noticed:

readonly is not a valid param according to the spec https://kubernetes.io/docs/concepts/storage/volumes/. The correct param would be readOnly. I assume this field is ignored, but since I assume the state should not be readOnly, I took the liberty to remove that.

[MichaelSp]

@cfis pong :)

[cfis]

Oh sorry, totally missed your last update. Thanks for updating!