fileprivate func getContext() -> NSManagedObjectContext {
        let appDelegate = UIApplication.shared.delegate as! AppDelegate
        return appDelegate.persistentContainer.viewContext
}

func deleteTestObjects(entity: String) {

        let context = getContext()

        let fetch = NSFetchRequest<NSFetchRequestResult>(entityName: entity)
        fetch.returnsObjectsAsFaults = false
        fetch.includesPropertyValues = false

        let request = NSBatchDeleteRequest(fetchRequest: fetch)

        do {
            try context.execute(request)
            print("Objects have been deleted")
        } catch let error as NSError {
            print("Error deleting objects \(error.localizedDescription)")
        }

    }