public void SetupCategory()
 {
     category = new CategoryDbRecord()
     {
         ID = "mnb"
     };
 }
        public static CategoryObject Create(string id, string userId, string categoryName, DateTime?validFrom = null,
                                            DateTime?validTo = null)
        {
            var o = new CategoryDbRecord
            {
                ID           = id,
                UserID       = userId,
                CategoryName = categoryName,
                ValidFrom    = validFrom ?? DateTime.MinValue,
                ValidTo      = validTo ?? DateTime.MaxValue
            };

            return(new CategoryObject(o));
        }