add tests before release (#2174)

Signed-off-by: George Kaz <egeorgekaz@gmail.com>

.github/workflows/helm-release.yaml

@@ -8,8 +8,28 @@ on:
       - '.github/workflows/helm-release.yaml'
 
 jobs:
+  helm-tests:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Unshallow
+        run: git fetch --prune --unshallow
+
+      - uses: actions/setup-python@v2
+        with:
+          python-version: 3.7
+
+      - name: Set up chart-testing
+        uses: helm/chart-testing-action@v2.0.1
+
+      - name: Run chart-testing (lint)
+        run: ct lint --target-branch=main --check-version-increment=false
+
   create-release:
     runs-on: ubuntu-latest
+    needs: helm-tests
     steps:
       - name: Checkout
         uses: actions/checkout@v2

.github/workflows/helm-test.yaml

@@ -1,15 +1,11 @@
 name: helm-test
 on:
-  push:
-    branches:
-      - 'main'
-    paths:
-      - 'charts/kyverno/**'
   pull_request:
     branches:
       - 'main'
     paths:
       - 'charts/kyverno/**'
+      - '.github/workflows/helm-test.yaml'
 
 jobs:
   helm-tests: