Add more unit tests to helm chart (#10731)

* Add more unit tests to helm chart

Signed-off-by: Stavros Foteinopoulos <stafot@gmail.com>

* Apply suggestions from code review

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

* Apply suggestions from code review

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

* Apply suggestions from code review

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

* Use upstream helm-unittest repository

Signed-off-by: Stavros Foteinopoulos <stafot@gmail.com>

* Remove non existing value from controller unittest

Signed-off-by: Stavros Foteinopoulos <stafot@gmail.com>

* fix unit test

Signed-off-by: Stavros Foteinopoulos <stafot@gmail.com>

* Apply suggestions from code review

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

* Apply suggestions from code review

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

---------

Signed-off-by: Stavros Foteinopoulos <stafot@gmail.com>
Co-authored-by: Marco Ebert <marco_ebert@icloud.com>

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

@@ -0,0 +1,32 @@
+suite: Controller > Service
+templates:
+  - controller-service.yaml
+
+tests:
+  - it: should not create a Service if `controller.service.external.enabled` is false
+    set:
+      controller.service.external.enabled: false
+    asserts:
+      - hasDocuments:
+          count: 0
+
+  - it: should create a Service if `controller.service.external.enabled` is true
+    set:
+      controller.service.external.enabled: true
+    asserts:
+      - hasDocuments:
+          count: 1
+      - isKind:
+          of: Service
+      - equal:
+          path: metadata.name
+          value: RELEASE-NAME-ingress-nginx-controller
+
+  - it: should create a Service of type "NodePort" if `controller.service.external.enabled` is true and `controller.service.type` is "NodePort"
+    set:
+      controller.service.enabled: true
+      controller.service.type: NodePort
+    asserts:
+      - equal:
+          path: spec.type
+          value: NodePort