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-deployment_test.yaml

@@ -0,0 +1,34 @@
+suite: Controller > Deployment
+templates:
+  - controller-deployment.yaml
+
+tests:
+  - it: should create a Deployment
+    asserts:
+      - hasDocuments:
+          count: 1
+      - isKind:
+          of: Deployment
+      - equal:
+          path: metadata.name
+          value: RELEASE-NAME-ingress-nginx-controller
+
+  - it: should create a Deployment with 3 replicas if `controller.replicaCount` is 3
+    set:
+      controller.replicaCount: 3
+    asserts:
+      - equal:
+          path: spec.replicas
+          value: 3
+
+  - it: should create a Deployment with resource limits if `controller.resources.limits` is set
+    set:
+      controller.resources.limits.cpu: 500m
+      controller.resources.limits.memory: 512Mi
+    asserts:
+      - equal:
+          path: spec.template.spec.containers[0].resources.limits.cpu
+          value: 500m
+      - equal:
+          path: spec.template.spec.containers[0].resources.limits.memory
+          value: 512Mi