Add charts test

Signed-off-by: Benjamin Huo <benjamin@kubesphere.io>

.github/workflows/lint-test.yaml

@@ -0,0 +1,45 @@
+name: Lint and Test Charts
+
+on: pull_request
+
+jobs:
+  lint-test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Set up Helm
+        uses: azure/setup-helm@v1
+        with:
+          version: v3.6.3
+
+      # Python is required because `ct lint` runs Yamale (https://github.com/23andMe/Yamale) and
+      # yamllint (https://github.com/adrienverge/yamllint) which require Python
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.7
+
+      - name: Set up chart-testing
+        uses: helm/chart-testing-action@v2.1.0
+
+      - name: Run chart-testing (list-changed)
+        id: list-changed
+        run: |
+          changed=$(ct list-changed --chart-dirs charts/fluent-operator --config ct.yaml)
+          if [[ -n "$changed" ]]; then
+            echo "::set-output name=changed::true"
+          fi
+
+      - name: Run chart-testing (lint)
+        run: ct lint --chart-dirs charts/fluent-operator --config ct.yaml
+
+      - name: Create kind cluster
+        uses: helm/kind-action@v1.2.0
+        if: steps.list-changed.outputs.changed == 'true'
+
+      - name: Run chart-testing (install)
+        run: ct install --chart-dirs charts/fluent-operator --config ct.yaml

tests/ct.yaml

@@ -0,0 +1,6 @@
+# See https://github.com/helm/chart-testing#configuration
+remote: origin
+chart-dirs:
+  - charts/fluent-operator
+helm-extra-args: --timeout=500s
+target-branch: master