feat(Test): template tests

[aali309]

see #142

[aali309]

Working on TESTING.md to serve as a guide for contributors.

[tthvo]

@aali309 We should also create a workflow to run these tests on PR and push. What do you think?

[aali309]

@aali309 We should also create a workflow to run these tests on PR and push. What do you think?

Will do that as well

[tthvo]

Looks like a good start! I think there are still cases and validations that need covering.

As for the NOTES.txt, you can do the following, for example:

suite: Test NOTES.txt
templates:
  - templates/NOTES.txt

tests:
  - it: should be render correct notes for enabled ingress
    set:
      core.ingress.enabled: true
      core:
        ingress:
          className: nginx
          hosts:
            - host: example.com
              paths:
                - path: /
                  pathType: Prefix
          tls:
            - hosts:
                - example.com
              secretName: example-tls
    asserts:
      - equalRaw:
          value: |


            1. Visit the Cryostat application at:
              ```
              https://example.com/
              ```

[ebaron]

Fantastic work @aali309!

[aali309]

I will be adding more test cases on this.

[aali309]

ping @andrewazores @ebaron

[andrewazores]

Looks great! Just the two tiny notes above.

[tthvo]

Looks good to me! This is awesome!