[alertmanager] Unit test sample for ingress version (prometheus-community#1149)

* Unit test sample for ingress version in alertmanager

Signed-off-by: Karl-Philipp Richter <[email protected]>

* Activate execution of unit tests in githooks

Signed-off-by: Karl-Philipp Richter <[email protected]>

* More compatible helm plugin URL in lint-test.yaml

Signed-off-by: Karl-Philipp Richter <[email protected]>

* Combine file patterns in order to avoid confusing output

Co-authored-by: Torsten Walter <[email protected]>
Signed-off-by: Karl-Philipp Richter <[email protected]>

* Adjust to directory unittests

Signed-off-by: Karl-Philipp Richter <[email protected]>

Co-authored-by: Torsten Walter <[email protected]>

Author: krichter722

.github/workflows/lint-test.yaml

@@ -26,6 +26,11 @@ jobs:
           if [[ -n "$changed" ]]; then
             echo "::set-output name=changed::true"
           fi
+      - name: install helm unittest plugin
+        if: steps.list-changed.outputs.changed == 'true'
+        run: |
+          helm env
+          helm plugin install https://github.com/quintush/helm-unittest.git --version 0.2.6
       - name: Run chart-testing (lint)
         run: ct lint --config ct.yaml
       - name: Create kind cluster

charts/alertmanager/.helmignore

@@ -21,3 +21,5 @@
 .idea/
 *.tmproj
 .vscode/
+
+unittests/

charts/alertmanager/Chart.yaml

@@ -6,7 +6,7 @@ icon: https://raw.githubusercontent.com/prometheus/prometheus.github.io/master/a
 sources:
   - https://github.com/prometheus/alertmanager
 type: application
-version: 0.12.1
+version: 0.12.2
 appVersion: v0.22.1
 maintainers:
   - name: monotek

charts/alertmanager/unittests/__snapshot__/ingress_test.yaml.snap

@@ -0,0 +1,17 @@
+should match snapshot of default values:
+  1: |
+    apiVersion: networking.k8s.io/v1beta1
+    kind: Ingress
+    metadata:
+      labels:
+        app.kubernetes.io/instance: RELEASE-NAME
+        app.kubernetes.io/managed-by: Helm
+        app.kubernetes.io/name: alertmanager
+        app.kubernetes.io/version: 1.0.0
+        helm.sh/chart: alertmanager-1.0.0
+      name: RELEASE-NAME-alertmanager
+    spec:
+      rules:
+      - host: alertmanager.domain.com
+        http:
+          paths: null

charts/alertmanager/unittests/ingress_test.yaml

@@ -0,0 +1,42 @@
+suite: test ingress
+templates:
+  - ingress.yaml
+tests:
+  - it: should be empty if ingress is not enabled
+    asserts:
+      - hasDocuments:
+          count: 0
+  - it: should have apiVersion extensions/v1beta1 for k8s < 1.14
+    set:
+      ingress.enabled: true
+    capabilities:
+      majorVersion: 1
+      minorVersion: 13
+    asserts:
+      - hasDocuments:
+          count: 1
+      - isKind:
+          of: Ingress
+      - isAPIVersion:
+          of: extensions/v1beta1
+  - it: should have apiVersion networking.k8s.io/v1beta1 for k8s >= 1.14 < 1.19
+    set:
+      ingress.enabled: true
+    capabilities:
+      majorVersion: 1
+      minorVersion: 15
+    asserts:
+      - hasDocuments:
+          count: 1
+      - isKind:
+          of: Ingress
+      - isAPIVersion:
+          of: networking.k8s.io/v1beta1
+  - it: should match snapshot of default values
+    set:
+      ingress.enabled: true
+    chart:
+      version: 1.0.0
+      appVersion: 1.0.0
+    asserts:
+      - matchSnapshot: { }

ct.yaml

@@ -11,3 +11,5 @@ helm-extra-args: --timeout 600s
 excluded-charts:
   # If not running on GCE, will error: "Failed to get GCE config"
   - prometheus-to-sd
+additional-commands:
+  - helm unittest --helm3 --strict --file unittests/*.yaml --file 'unittests/**/*.yaml' {{ .Path }}