public void TestOne()
{
this.orderHeaderId = layer.CreateNewOrderHeader();
IEnumerable <StockItem> allItems = layer.GetStockItems();
double price = allItems.ElementAt(0).Price;
OrderItem input = new OrderItem("In_stock", orderHeaderId, price,
quantityOfStockItemTested, idOfStockItemTested, price * quantityOfStockItemTested);
layer.UpsertOrderItem(input.Description, input.Price, input.OrderHeaderId,
input.StockItemId, input.Quantity);
OrderItem output = layer.ProcessOrder(orderHeaderId).ElementAt(0);
//checking that the input and output are equal
Assert.AreEqual(input.Description + " " + input.Price + " " + input.OrderHeaderId +
" " + input.StockItemId + " " + input.Quantity + " " + input.Total,
output.Description + " " + output.Price + " " + output.OrderHeaderId + " " +
output.StockItemId + " " + output.Quantity + " " + output.Total);
}
/// <summary>
/// Constructor for AddOrderItem
/// </summary>
/// <param name="orderHeaderId">The unique ID of the order header</param>
public AddOrderItemView(int orderHeaderId)
{
InitializeComponent();
this.orderHeaderId = orderHeaderId;
dgStockItems.ItemsSource = layer.GetStockItems();
}