self-hosted e2e should check managed fields

Author: Yuvaraj Kakaraparthi

test/e2e/self_hosted.go

@@ -226,6 +226,26 @@ func SelfHostedSpec(ctx context.Context, inputGetter func() SelfHostedSpecInput)
 			Namespace:            namespace.Name,
 		})
 
+		// Note: clusterctl should restore the managedFields to the same as before the move,
+		// and thus removing any managedField entries with clusterctl as a manager. This should happen
+		// for all the objects processed by move, but for sake of simplicity we test only the Cluster
+		// object. The Cluster object has special processing for the paused field during the move to
+		// avoid having clusterctl as the manager of the field.
+		log.Logf("Ensure clusterctl does not take ownership on any fields on the self-hosted cluster")
+		selfHostedCluster := framework.GetClusterByName(ctx, framework.GetClusterByNameInput{
+			Getter:    selfHostedClusterProxy.GetClient(),
+			Name:      cluster.Name,
+			Namespace: selfHostedNamespace.Name,
+		})
+		hasClusterctlManagedFields := false
+		for _, managedField := range selfHostedCluster.GetManagedFields() {
+			if managedField.Manager == "clusterctl" {
+				hasClusterctlManagedFields = true
+				break
+			}
+		}
+		Expect(hasClusterctlManagedFields).To(BeFalse(), "clusterctl should not manage any fields on the Cluster after the move")
+
 		log.Logf("Waiting for the cluster to be reconciled after moving to self hosted")
 		selfHostedCluster = framework.DiscoveryAndWaitForCluster(ctx, framework.DiscoveryAndWaitForClusterInput{
 			Getter:    selfHostedClusterProxy.GetClient(),