public void CreateProductMarkdownLineItems_CreatesOneMarkdownLineItemPerScannedItem(int scannedItemCount)
{
var product = new Product("product with markdown", Money.USDollar(1m), SellByType.Unit)
{
Markdown = MarkdownProvider.GetMarkdown(DateRange.Active)
};
PopulateOrder(product, scannedItemCount);
var lineItems = InvoiceFactory.CreateProductMarkdownLineItems(_order.ScannedItems).ToList();
var lineItemScannedItemIds = lineItems.Select(x => ((MarkdownLineItem)x).ScannedItemId).ToList();
lineItemScannedItemIds.Should().OnlyHaveUniqueItems();
lineItemScannedItemIds.Should().BeEquivalentTo(_order.ScannedItems.Select(x => x.Id));
}