Adds e2e tests for image override

Signed-off-by: Somtochi Onyekwere <somtochionyekwere@gmail.com>

.github/workflows/e2e.yaml

@@ -80,6 +80,12 @@ jobs:
         run: |
           kubectl -n impersonation apply -f ./config/testdata/impersonation
           kubectl -n impersonation wait kustomizations/podinfo --for=condition=ready --timeout=4m
+      - name: Run image overide tests
+        run: |
+          kubectl -n override-test apply -f ./config/testdata/overrides
+          kubectl -n override-test wait kustomizations/podinfo --for=condition=ready --timeout=1m
+          ACTUAL_TAG=$(kubectl -n override-test get deployments podinfo -o jsonpath='{.spec.template.spec.containers[0].image}' | cut -f2 -d ":")
+          if [[ $ACTUAL_TAG != "5.0.0" ]]; then echo "Image tag did not override" && exit 1; fi
       - name: Logs
         run: |
           kubectl -n kustomize-system logs deploy/source-controller

config/testdata/overrides/test.yaml

@@ -0,0 +1,34 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: override-test
+---
+apiVersion: source.toolkit.fluxcd.io/v1beta1
+kind: GitRepository
+metadata:
+  name: podinfo
+  namespace: override-test
+spec:
+  interval: 5m
+  url: https://github.com/stefanprodan/podinfo
+  ref:
+    branch: master
+---
+apiVersion: kustomize.toolkit.fluxcd.io/v1beta1
+kind: Kustomization
+metadata:
+  name: podinfo
+  namespace: override-test
+spec:
+  targetNamespace: override-test
+  interval: 5m
+  path: "./kustomize"
+  prune: true
+  sourceRef:
+    kind: GitRepository
+    name: podinfo
+  validation: client
+  images:
+    - name: ghcr.io/stefanprodan/podinfo
+      newName: ghcr.io/stefanprodan/podinfo
+      newTag: 5.0.0