Provide e2e testing based on kuttl (#154)

* feat: add e2e testing workflow with kuttl

.github/workflows/e2e.yaml

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+name: e2e
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+jobs:
+  e2e:
+    name: e2e
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v4
+
+      - name: install kuttl
+        run: |
+          curl -L https://github.com/kudobuilder/kuttl/releases/download/v0.15.0/kubectl-kuttl_0.15.0_linux_x86_64 -o /usr/local/bin/kubectl-kuttl
+          chmod +x /usr/local/bin/kubectl-kuttl
+
+      - name: create kind cluster
+        uses: helm/[email protected]
+
+      - name: set up helm
+        uses: azure/setup-helm@v3
+
+      - name: run e2e test
+        run: kubectl kuttl test

kuttl-test.yaml

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+apiVersion: kuttl.dev/v1beta1
+kind: TestSuite
+testDirs:
+  - tests/
+commands:
+  - command: kubectl apply -f ./deploy/crds.yml
+timeout: 120

tests/nack.yaml

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+jetstream:
+  enabled: true
+
+  nats:
+   url: nats://nats:4222
+
+namespaced: true

tests/nats.yaml

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+---
+global:
+  labels:
+    app: main-jetstream
+
+natsBox:
+  enabled: false
+
+config:
+  cluster:
+    enabled: false
+
+  gateway:
+    enabled: false
+
+  jetstream:
+    enabled: true
+
+    memoryStore:
+      enabled: true
+      maxSize: 256Mi
+
+    memoryStore:
+      enabled: true
+      pvc:
+        enabled: true
+        size: 256Mi

tests/stream-creation/00-nack.yaml

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+apiVersion: kuttl.dev/v1beta1
+kind: TestStep
+unitTest: false
+commands:
+  - command: helm uninstall --namespace $NAMESPACE nats
+    ignoreFailure: true
+  - command: helm uninstall --namespace $NAMESPACE nack
+    ignoreFailure: true
+  - command: helm repo add nats https://nats-io.github.io/k8s/helm/charts
+  - command: helm upgrade --install --wait --namespace $NAMESPACE nats nats/nats -f ../nats.yaml
+  - command: helm upgrade --install --wait --namespace $NAMESPACE nack nats/nack -f ../nack.yaml

tests/stream-creation/01-stream.yaml

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+apiVersion: kuttl.dev/v1beta1
+kind: TestStep
+apply:
+  - rides-stream.yaml
+assert:
+  - asserted-rides-stream.yaml
+unitTest: false

tests/stream-creation/02-natscli-stream.yaml

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+apiVersion: kuttl.dev/v1beta1
+kind: TestStep
+apply:
+  - natscli.yaml
+assert:
+  - asserted-natscli.yaml
+unitTest: false

tests/stream-creation/asserted-natscli.yaml

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+apiVersion: v1
+kind: Pod
+metadata:
+  labels:
+    run: natscli
+  name: natscli
+status:
+  phase: Succeeded

tests/stream-creation/asserted-rides-stream.yaml

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+apiVersion: jetstream.nats.io/v1beta2
+kind: Stream
+metadata:
+  name: rides
+spec:
+  allowDirect: false
+  allowRollup: false
+  compression: ""
+  creds: ""
+  denyDelete: false
+  discard: old
+  discardPerSubject: false
+  firstSequence: 0
+  maxAge: ""
+  maxBytes: -1
+  maxConsumers: -1
+  maxMsgSize: -1
+  maxMsgs: -1
+  maxMsgsPerSubject: 0
+  name: rides
+  nkey: ""
+  noAck: false
+  preventDelete: false
+  preventUpdate: false
+  replicas: 1
+  retention: limits
+  servers: []
+  storage: memory
+  subjects:
+    - rides.>

tests/stream-creation/natscli.yaml

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+apiVersion: v1
+kind: Pod
+metadata:
+  labels:
+    run: natscli
+  name: natscli
+spec:
+  restartPolicy: Never
+  containers:
+  - image: natsio/nats-box
+    name: natscli
+    command:
+      - nats
+    args:
+      - -s
+      - nats://nats:4222
+      - stream
+      - info
+      - rides

tests/stream-creation/rides-stream.yaml

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+apiVersion: jetstream.nats.io/v1beta2
+kind: Stream
+metadata:
+  name: rides
+spec:
+  name: rides
+  subjects:
+    - "rides.>"
+  storage: memory
+  replicas: 1