Chart: Add tests for PrometheusRule & ServiceMonitor. (#11889)

Co-authored-by: Marco Ebert <marco_ebert@icloud.com>

charts/ingress-nginx/README.md

@@ -380,7 +380,7 @@ As of version `1.26.0` of this chart, by simply not providing any clusterIP valu
 | controller.metrics.service.servicePort | int | `10254` |  |
 | controller.metrics.service.type | string | `"ClusterIP"` |  |
 | controller.metrics.serviceMonitor.additionalLabels | object | `{}` |  |
-| controller.metrics.serviceMonitor.annotations | object | `{}` |  |
+| controller.metrics.serviceMonitor.annotations | object | `{}` | Annotations to be added to the ServiceMonitor. |
 | controller.metrics.serviceMonitor.enabled | bool | `false` |  |
 | controller.metrics.serviceMonitor.metricRelabelings | list | `[]` |  |
 | controller.metrics.serviceMonitor.namespace | string | `""` |  |

charts/ingress-nginx/tests/controller-prometheusrule_test.yaml

@@ -0,0 +1,17 @@
+suite: Controller > PrometheusRule
+templates:
+  - controller-prometheusrule.yaml
+
+tests:
+  - it: should create a PrometheusRule if `controller.metrics.prometheusRule.enabled` is true
+    set:
+      controller.metrics.enabled: true
+      controller.metrics.prometheusRule.enabled: true
+    asserts:
+      - hasDocuments:
+          count: 1
+      - isKind:
+          of: PrometheusRule
+      - equal:
+          path: metadata.name
+          value: RELEASE-NAME-ingress-nginx-controller

charts/ingress-nginx/tests/controller-servicemonitor_test.yaml

@@ -0,0 +1,29 @@
+suite: Controller > ServiceMonitor
+templates:
+  - controller-servicemonitor.yaml
+
+tests:
+  - it: should create a ServiceMonitor if `controller.metrics.serviceMonitor.enabled` is true
+    set:
+      controller.metrics.enabled: true
+      controller.metrics.serviceMonitor.enabled: true
+    asserts:
+      - hasDocuments:
+          count: 1
+      - isKind:
+          of: ServiceMonitor
+      - equal:
+          path: metadata.name
+          value: RELEASE-NAME-ingress-nginx-controller
+
+  - it: should create a ServiceMonitor with annotations if `controller.metrics.serviceMonitor.annotations` is set
+    set:
+      controller.metrics.enabled: true
+      controller.metrics.serviceMonitor.enabled: true
+      controller.metrics.serviceMonitor.annotations:
+        my-little-annotation: test-value
+    asserts:
+      - equal:
+          path: metadata.annotations
+          value:
+            my-little-annotation: test-value

charts/ingress-nginx/values.yaml

@@ -873,6 +873,7 @@ controller:
     serviceMonitor:
       enabled: false
       additionalLabels: {}
+      # -- Annotations to be added to the ServiceMonitor.
       annotations: {}
       ## The label to use to retrieve the job name from.
       ## jobLabel: "app.kubernetes.io/name"