Add a few more unittests for rstudio-workbench

ci/rstudio-workbench/tests/ingress_test.yaml

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+suite: Workbench Ingress
+templates:
+  - ingress.yaml
+tests:
+  - it: should include the tls path if tls has values specified and ingress is enabled
+    template: ingress.yaml
+    set:
+      ingress:
+        enabled: true
+        tls:
+          - hosts:
+              - "example.com"
+            secretName: "example-tls"
+    asserts:
+      - exists:
+          path: "spec.tls"
+      - equal:
+          path: "spec.tls[0].hosts[0]"
+          value: "example.com"
+  - it: should not include the tls path if tls has no values specified and ingress is enabled
+    template: ingress.yaml
+    set:
+      ingress:
+        enabled: true
+        tls: []
+    asserts:
+      - notExists:
+          path: "spec.tls"
+  - it: should include the tls path if tls has values specified and ingress is enabled
+    template: ingress.yaml
+    set:
+      ingress:
+        enabled: true
+        tls:
+          - secretName: chart-example-tls
+            hosts:
+              - chart-example.local
+    asserts:
+      - exists:
+          path: "spec.tls"
+  - it: should include the ingressClassName if defined and ingress is enabled
+    template: ingress.yaml
+    set:
+      ingress:
+        enabled: true
+        ingressClassName: "alb"
+    asserts:
+      - equal:
+          path: "spec.ingressClassName"
+          value: "alb"
+  - it: should not include the ingressClassName if it is not defined and ingress is enabled
+    template: ingress.yaml
+    set:
+      ingress:
+        enabled: true
+    asserts:
+      - notExists:
+          path: "spec.ingressClassName"

ci/rstudio-workbench/tests/prometheus_test.yaml

@@ -0,0 +1,87 @@
+suite: Workbench prometheus configuration
+templates:
+  - configmap-general.yaml
+  - configmap-graphite-exporter.yaml
+  - configmap-prestart.yaml
+  - configmap-secret.yaml
+  - configmap-session.yaml
+  - deployment.yaml
+  - svc.yaml
+tests:
+  - it: should ensure the specified metrics port is used in the service if prometheus is enabled and legacy is not true
+    template: svc.yaml
+    set:
+      prometheus:
+        enabled: true
+        port: 8989
+    asserts:
+      - equal:
+          path: "spec.ports[1].name"
+          value: "metrics"
+      - equal:
+          path: "spec.ports[1].port"
+          value: 8989
+  - it: should ensure the legacy metrics port is used in the service if prometheus is enabled and legacy is true
+    template: svc.yaml
+    set:
+      prometheus:
+        enabled: true
+        legacy: true
+        port: 8989
+    asserts:
+      - equal:
+          path: "spec.ports[1].name"
+          value: "metrics"
+      - equal:
+          path: "spec.ports[1].port"
+          value: 9108
+  - it: should ensure the prometheus annotations are defined in the service, and that the graphite exporter checksum is non-existent
+    template: deployment.yaml
+    set:
+      prometheus:
+        enabled: true
+        port: 8989
+    asserts:
+      - isSubset:
+          path: spec.template.metadata.annotations
+          content:
+            prometheus.io/scrape: "true"
+            prometheus.io/path: "/metrics"
+            prometheus.io/port: "8989"
+      - notExists:
+          path: "spec.template.metadata.annotations.checksum/config-graphite"
+  - it: should ensure the legacy prometheus annotations are defined in the service, and that the graphite exporter checksum exists
+    template: deployment.yaml
+    set:
+      prometheus:
+        enabled: true
+        legacy: true
+        port: 8989
+    asserts:
+      - isSubset:
+          path: spec.template.metadata.annotations
+          content:
+            prometheus.io/scrape: "true"
+            prometheus.io/path: "/metrics"
+            prometheus.io/port: "9108"
+      - exists:
+          path: "spec.template.metadata.annotations.checksum/config-graphite"
+  - it: should ensure the legacy metrics port is used and that the graphite exporter container exists
+    template: deployment.yaml
+    set:
+      prometheus:
+        enabled: true
+        legacy: true
+        port: 8989
+      prometheusExporter:
+        enabled: true
+    asserts:
+      - equal:
+          path: "spec.template.spec.containers[1].name"
+          value: "exporter"
+      - equal:
+          path: "spec.template.spec.containers[1].ports[0].name"
+          value: "metrics"
+      - equal:
+          path: "spec.template.spec.containers[1].ports[0].containerPort"
+          value: 9108

ci/rstudio-workbench/tests/update_strategy_test.yaml

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+suite: Workbench Deployment
+templates:
+  - configmap-general.yaml
+  - configmap-prestart.yaml
+  - configmap-secret.yaml
+  - configmap-session.yaml
+  - deployment.yaml
+tests:
+  - it: should not specify the RollingUpdate configuration if the strategy type is not RollingUpdate
+    template: deployment.yaml
+    set:
+      strategy:
+        type: "Recreate"
+    asserts:
+      - notExists:
+          path: "spec.strategy.rollingUpdate"
+  - it: should specify the RollingUpdate configuration if the strategy type is RollingUpdate
+    template: deployment.yaml
+    set:
+      strategy:
+        type: "RollingUpdate"
+        rollingUpdate:
+          maxUnavailable: 1
+          maxSurge: "50%"
+    asserts:
+      - equal:
+          path: "spec.strategy.type"
+          value: "RollingUpdate"
+      - equal:
+          path: "spec.strategy.rollingUpdate.maxUnavailable"
+          value: 1
+      - equal:
+          path: "spec.strategy.rollingUpdate.maxSurge"
+          value: "50%"