Status: apps.StatefulSetStatus{Replicas: 4},
		}
		Strategy.PrepareForUpdate(ctx, validPs, ps)
		errs = Strategy.ValidateUpdate(ctx, validPs, ps)
		if len(errs) != 0 {
			t.Errorf("updating spec.Replicas and minReadySeconds is allowed on a statefulset: %v", errs)
		}
		invalidPs := ps
		invalidPs.Spec.MinReadySeconds = int32(-1)
		Strategy.PrepareForUpdate(ctx, validPs, invalidPs)
		errs = Strategy.ValidateUpdate(ctx, validPs, ps)

		},
	}

	// Nothing in Spec changes: OK
	Strategy.PrepareForUpdate(ctx, newPdb, pdb)
	errs = Strategy.ValidateUpdate(ctx, newPdb, pdb)
	if len(errs) != 0 {
		t.Errorf("Unexpected error updating PodDisruptionBudget.")
	}

	// Changing the selector?  OK
	newPdb.Spec.Selector = &metav1.LabelSelector{MatchLabels: map[string]string{"a": "bar"}}
	Strategy.PrepareForUpdate(ctx, newPdb, pdb)

	csr.Status.Conditions = []certificates.CertificateSigningRequestCondition{}
}

// PrepareForUpdate clears fields that are not allowed to be set by end users
// on update. Certificate requests are immutable after creation except via subresources.
func (csrStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
	newCSR := obj.(*certificates.CertificateSigningRequest)

			Schedule: "5 5 5 * ?",
		},
		Status: batch.CronJobStatus{
			LastScheduleTime: &now,
		},
	}

	// ensure we do not change status
	Strategy.PrepareForUpdate(ctx, updatedCronJob, cronJob)
	if updatedCronJob.Status.Active != nil {
		t.Errorf("PrepareForUpdate should have preserved prior version status")
	}
	if updatedCronJob.Generation != 2 {
		t.Errorf("expected Generation=2, got %d", updatedCronJob.Generation)
	}

				crd.Status.StoredVersions = append(crd.Status.StoredVersions, v.Name)
			}
			break
		}
	}
	dropDisabledFields(crd, nil)
}

// PrepareForUpdate clears fields that are not allowed to be set by end users on update.
func (strategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
	newCRD := obj.(*apiextensions.CustomResourceDefinition)
	oldCRD := old.(*apiextensions.CustomResourceDefinition)

	service := obj.(*api.Service)
	service.Status = api.ServiceStatus{}

	dropServiceDisabledFields(service, nil)
}

// PrepareForUpdate sets contextual defaults and clears fields that are not allowed to be set by end users on update.
func (svcStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
	newService := obj.(*api.Service)
	oldService := old.(*api.Service)
	newService.Status = oldService.Status

	AllowCreateOnUpdate() bool
	// PrepareForUpdate is invoked on update before validation to normalize
	// the object.  For example: remove fields that are not to be persisted,
	// sort order-insensitive list fields, etc.  This should not remove fields
	// whose presence would be considered a validation error.
	PrepareForUpdate(ctx context.Context, obj, old runtime.Object)

	}

	// Update of spec is disallowed
	newCSIDriver := csiDriver.DeepCopy()
	attachNotRequired := false
	newCSIDriver.Spec.AttachRequired = &attachNotRequired

	Strategy.PrepareForUpdate(ctx, newCSIDriver, csiDriver)

	errs = Strategy.ValidateUpdate(ctx, newCSIDriver, csiDriver)
	if len(errs) == 0 {
		t.Errorf("Expected a validation error")
	}
}

		job.Spec.PodReplacementPolicy = nil
	}

	pod.DropDisabledTemplateFields(&job.Spec.Template, nil)
}

// PrepareForUpdate clears fields that are not allowed to be set by end users on update.
func (jobStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
	newJob := obj.(*batch.Job)
	oldJob := old.(*batch.Job)
	newJob.Status = oldJob.Status

		// create cannot set status
		delete(customResource, "status")
	}

	accessor, _ := meta.Accessor(obj)
	accessor.SetGeneration(1)
}

// PrepareForUpdate clears fields that are not allowed to be set by end users on update.
func (a customResourceStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
	newCustomResourceObject := obj.(*unstructured.Unstructured)
	oldCustomResourceObject := old.(*unstructured.Unstructured)