public void EditTrading_CorrectData_TrueReturned()
        {
            //Arrange
            int    book_id   = 3;
            string ticket    = "А-1234-21";
            string delivery  = "2004.11.11";
            string reception = "2004.12.11";
            string login     = "******";
            string newTicket = "А-2134-21";
            //Act
            List <trading> updatingTrading = new List <trading>();

            if (tradingController.AddNewTrading(book_id, ticket, Convert.ToDateTime(delivery), Convert.ToDateTime(reception), login))
            {
                int tradingId = dbHelper.context.trading.OrderByDescending(t => t.trading_id).FirstOrDefault().trading_id;
                updatingTrading = tradingController.GetTradingString(tradingId);

                if (tradingController.UpdateTradingInfo(Convert.ToInt32(book_id), newTicket, Convert.ToDateTime(delivery), Convert.ToDateTime(reception), updatingTrading))
                {
                    dbHelper = new DbHelper();
                    string expectedTicket = dbHelper.context.trading.Where(t => t.ticket == newTicket).First().ticket;

                    var selectString = dbHelper.context.trading.OrderByDescending(t => t.trading_id).First().trading_id;
                    tradingController.RemoveTrading(selectString);

                    //Assert
                    Assert.AreEqual(newTicket, expectedTicket);
                }
            }
        }
        /// <summary>
        /// Действия при инициализации страницы EditTradingPage
        /// </summary>
        /// <param name="context" - контекст базы данных></param>
        /// <param name="bookDataContext" - выбранная строка дата грид></param>
        public EditTradingPage(LibraryEntities context, trading bookDataContext)
        {
            InitializeComponent();

            NewBookComboBox.DisplayMemberPath = "book_id";
            NewBookComboBox.SelectedValuePath = "book_id";

            NewBookComboBox.ItemsSource   = booksController.BooksInfoOutput();
            NewBookComboBox.SelectedIndex = booksController.SelectedIndexBookComboBox(bookDataContext, NewBookComboBox);

            foreach (var item in tradingController.GetTradingString(Settings.Default.selectBook2))
            {
                NewTicketInput.Text    = item.ticket;
                NewDeliveryInput.Text  = Convert.ToString(item.delivery.ToString("yyyy.MM.dd"));
                NewReceptionInput.Text = Convert.ToString(item.reception.ToString("yyyy.MM.dd"));
            }

            updatingTrading = tradingController.GetTradingString(Settings.Default.selectBook2);
        }