feat: (CCIE-3082) add unit testing to GHA (#64)

.github/workflows/unittest.yaml

@@ -0,0 +1,13 @@
+name: Unit testing
+
+on: pull_request
+
+jobs:
+  unittest:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: d3adb5/helm-unittest-action@v2
+        with:
+          helm-version: v3.8.0
+          github-token: ${{ secrets.GITHUB_TOKEN }}

stack/.helmignore

@@ -21,3 +21,5 @@
 .idea/
 *.tmproj
 .vscode/
+# testing
+tests

stack/tests/deployment_test.yaml

@@ -0,0 +1,42 @@
+suite: test deployment
+templates:
+  - deployment.yaml
+tests:
+  - it: should work
+    set:
+      services:
+        service1:
+          args: ["arg1", "arg2"]
+          command: ["command1", "command2"]
+          autoscaling:
+            enabled: true
+            minReplicas: 2
+            maxReplicas: 10
+            maxUnavailable: 1
+          replicaCount: 2
+          sidecars:
+            - name: sidecar1
+              image: "sidecar1:latest"
+            - name: sidecar2
+              image: "sidecar2:latest"
+          initContainers:
+            - name: initContainer1
+              image: "alpine:latest"
+              command: ["echo", "Hello World"]
+    asserts:
+      - isKind:
+          of: Deployment
+      - isSubset:
+          path: spec
+          content:
+            revisionHistoryLimit: 3
+          any: true
+      - containsDocument:
+          apiVersion: apps/v1
+          kind: Deployment
+
+      #   path: metadata.name
+      #   pattern: -my-chart$
+      # - equal:
+      #   path: spec.template.spec.containers[0].image
+      #   value: nginx:latest