Split up lifecycle test wireUpSystem function

This splits up the wireUpSystem function into a chunk that makes it
"client agnostic". It also removes the requirement that the client
is faked.

node/lifecycle_test.go

@@ -21,6 +21,7 @@ import (
 	"k8s.io/apimachinery/pkg/util/uuid"
 	"k8s.io/apimachinery/pkg/watch"
 	kubeinformers "k8s.io/client-go/informers"
+	"k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/kubernetes/fake"
 	corev1client "k8s.io/client-go/kubernetes/typed/core/v1"
 	ktesting "k8s.io/client-go/testing"
@@ -226,7 +227,7 @@ func TestPodLifecycle(t *testing.T) {
 type testFunction func(ctx context.Context, s *system)
 type system struct {
 	pc                  *PodController
-	client              *fake.Clientset
+	client              kubernetes.Interface
 	podControllerConfig PodControllerConfig
 }
 
@@ -262,6 +263,13 @@ func wireUpSystem(ctx context.Context, provider PodLifecycleHandler, f testFunct
 		return false, nil, nil
 	})
 
+	return wireUpSystemWithClient(ctx, provider, client, f)
+}
+
+func wireUpSystemWithClient(ctx context.Context, provider PodLifecycleHandler, client kubernetes.Interface, f testFunction) error {
+	ctx, cancel := context.WithCancel(ctx)
+	defer cancel()
+
 	// This is largely copy and pasted code from the root command
 	sharedInformerFactory := kubeinformers.NewSharedInformerFactoryWithOptions(
 		client,