public ProductPreviewMessage(Product product)
{
if (product == null)
throw new ArgumentNullException("product");
Product = product;
}
public ProductPreviewViewModel(IMessenger messenger, IBasketModel basketModel)
{
// Design setup
if (this.IsInDesignMode)
{
Visible = true;
Product = new Product()
{
ProductId=12345,
Name = "Product Name",
Description = "Product Description",
UpdatedDate = DateTime.Today,
};
}
// Unpack
MessengerInstance = messenger;
_basketModel = basketModel;
// Register Message Handlers
MessengerInstance.Register<ProductPreviewMessage>(this, HandleProductPreview);
// Commands
CloseCommand = new RelayCommand(CloseExecute);
AddProductCommand = new RelayCommand(AddProductExecute);
}
public void ShouldAddProductWhenRecievingAddProductEvent()
{
var product = new Product();
_model.AddItem(product);
Assert.AreEqual(1, _model.Items.Count());
Assert.AreEqual(product, _model.Items.First().Product);
}
public void ShouldBecomeVisibleAndContainProductWhenAProductPreviewMessageIsRecieved()
{
var product = new Product();
Assert.IsFalse(_viewModel.Visible);
Assert.IsNull(_viewModel.Product);
_previewHandle(new ProductPreviewMessage(product));
Assert.IsTrue(_viewModel.Visible);
Assert.AreEqual(product, _viewModel.Product);
}
public void ShouldRaiseProductPreviewMessageWhenViewCommandIsExecuted()
{
var product = new Product();
var message = (ProductPreviewMessage)null;
_messenger.Register<ProductPreviewMessage>(this, m => message = m);
_viewModel.ViewProductCommand.Execute(product);
Assert.IsNotNull(message);
Assert.AreEqual(product, message.Product);
}
public void ShouldUpdateTotalToReflectPriceOfItems()
{
var product1 = new Product() { ProductId = 1, Price = 1 };
var product2 = new Product() { ProductId = 1, Price = 1 };
var product3 = new Product() { ProductId = 2, Price = 2 };
_model.AddItem(product1);
_model.AddItem(product2);
_model.AddItem(product3);
Assert.AreEqual(4, _model.Total);
}
public void ShouldAddProductToBasketWhenAddProductCommandIsExecuted()
{
var product = new Product();
_viewModel.Product = product;
_basketModelMock
.Setup(m => m.AddItem(product, 1))
.Verifiable();
_viewModel.AddProductCommand.Execute(null);
_basketModelMock
.Verify();
}
public void ShouldIncrementProductCountWhenRecievingAddProductEventForExistingProduct()
{
var product1 = new Product() { ProductId = 1 };
var product2 = new Product() { ProductId = 1 };
_model.AddItem(product1);
_model.AddItem(product2);
Assert.AreEqual(1, _model.Items.Count());
var productViewModel = _model.Items.First();
Assert.AreEqual(product1, productViewModel.Product);
Assert.AreEqual(2, productViewModel.Count);
}
public void ShouldLoadProductsWhenSearchEventRecieved()
{
var searchTerm = "searchTerm";
var message = new SearchMessage(searchTerm);
var products = new List<Product>();
var product = new Product();
_productsServiceMock
.Setup(p => p.GetProducts(searchTerm))
.Returns(products)
.Verifiable();
_messenger.Send(message);
Utilities.WaitFor(() => _viewModel.Products != null, 5000);
_productsServiceMock.Verify();
Assert.AreEqual(products, _viewModel.Products);
}
public ProductListViewModel(IMessenger messenger, IProductsService productService)
{
// Design Setup
if (this.IsInDesignMode)
{
var product = new Product();
product.ProductId = 1;
product.Name = "Product";
product.Price = 100;
Products = new Product[] { product, product, product, product, product, product };
}
// Unpack
_productService = productService;
MessengerInstance = messenger;
// Events
MessengerInstance.Register<SearchMessage>(this, HandleSearch);
// Commands
ViewProductCommand = new RelayCommand<Product>(ViewProductExecute);
}
private void ViewProductExecute(Product product)
{
if (product == null)
throw new ArgumentNullException();
MessengerInstance.Send(new ProductPreviewMessage(product));
}
public void AddItem(Product product, int count = 1)
{
var existingProduct = _products.SingleOrDefault(p => p.Product.Equals(product));
if (existingProduct != null)
{
existingProduct.Count += count;
}
else
{
_products.Add(new BasketItemModel(product));
}
Total = _products.Sum(p => p.Count * p.Product.Price);
}