public void FullWalkthrough()
{
const decimal price = 100.00m;
const double customerDiscount = 0.1;
const int startQuantity = 100;
const int purchaseQuantity = 20;
const int expectedFinalQuantity = startQuantity - purchaseQuantity;
decimal expectedTotalPrice = purchaseQuantity * (price - (price * Convert.ToDecimal(customerDiscount)));
int storeId;
Guid membershipNumber;
int productId;
{//Arrange
var db = _unitOfWork.CreateDbContext <RetailDbContext>();
var customer = db.CreateCustomer()
.With(customer => customer.Discount = customerDiscount);
var store = db.CreateStore();
var product = db.CreateProduct()
.With(product => product.Price = price)
.With(product => product.SalesPrice = null)
.AddInventory(store, startQuantity);
db.SaveChanges();
membershipNumber = customer.MembershipNumber;
storeId = store.StoreId;
productId = product.ProductId;
}
{//Act
var storeLocator = new StoreLocatorService(new StoreRepository(_unitOfWork));
var customerService = new CustomerService(new CustomerRepository(_unitOfWork));
var orderService = new OrderCreationService(new OrderRepository(_unitOfWork));
var store = storeLocator.GetStoreById(storeId);
var customer = customerService.GetCustomerByMembershipNumber(membershipNumber);
var order = orderService.CreateOrder(customer, store);
var products = orderService.GetAvailableProducts(order);
foreach (var product in products)
{
order.AddLineItem(purchaseQuantity, product);
}
orderService.SubmitOrder(order);
}
{//Assert
var db = _unitOfWork.CreateDbContext <RetailDbContext>();
var inventory = db.Inventories
.Single(inventory => inventory.ProductId == productId && inventory.StoreId == storeId);
inventory.Quantity.ShouldBe(expectedFinalQuantity);
db.Orders
.Single(order => order.StoreId == storeId)
.TotalPrice.ShouldBe(expectedTotalPrice);
}
}
public void OrderWithNoLineItems_ThrowsInvalidOp()
{
Should.Throw <InvalidOperationException>(() => _service.SubmitOrder(_order));
}