Proposal: add unit tests (#138)

* Proposal: add basic unittest

* I had that all sorts of wrong

* right need a version bump

---------

Signed-off-by: Don O'Neill <[email protected]>

README.md

@@ -20,6 +20,32 @@ helm repo add opencost https://opencost.github.io/opencost-helm-chart
 
 See the [Chart Documentation](https://github.com/opencost/opencost-helm-chart/blob/main/charts/opencost/README.md) for chart install instructions.
 
+## Testing
+
+[Testing](https://github.com/helm-unittest/helm-unittest) your chart (optional)
+
+Presumes you've got Helm unittest installed: (i.e. `helm plugin install unittest`) and that your in the root directory of your cloned repo:
+
+```console
+helm unittest charts/opencost
+```
+Should produce a result like this:
+
+```
+### Chart [ opencost ] charts/opencost
+
+ PASS  test deployment	charts/opencost/tests/deployment_test.yaml
+ PASS  test deployment snapshot	charts/opencost/tests/opencost_test.yaml
+
+Charts:      1 passed, 1 total
+Test Suites: 2 passed, 2 total
+Tests:       2 passed, 2 total
+Snapshot:    1 passed, 1 total
+Time:        31.011089ms
+```
+
+***
+
 ## OpenCost Links
 * [OpenCost](https://github.com/opencost/opencost)
 * [Documentation](https://www.opencost.io/docs/)

charts/opencost/Chart.yaml

@@ -9,7 +9,7 @@ keywords:
   - kubecost
   - opencost
   - monitoring
-version: 1.22.1
+version: 1.22.2
 maintainers:
   - name: mattray
     url: https://mattray.dev

charts/opencost/tests/deployment_test.yaml

@@ -0,0 +1,16 @@
+suite: test deployment
+templates:
+  - templates/deployment.yaml
+tests:
+  - it: should work
+    set:
+      image.tag: latest
+    asserts:
+      - isKind:
+          of: Deployment
+      - matchRegex:
+          path: metadata.name
+          pattern: -opencost$
+      - matchRegex:
+          path: spec.template.spec.containers[0].image
+          pattern: quay\.io\/kubecost1\/kubecost-cost-model:prod-[0-9]*\.[0-9]*\.[0-9]*

charts/opencost/tests/opencost_test.yaml

@@ -0,0 +1,7 @@
+suite: test deployment snapshot
+templates:
+  - templates/deployment.yaml
+tests:
+  - it: pod spec should match snapshot
+    asserts:
+      - matchSnapshot: {}