public async Task AddProductToCart_WithValidData_ShouldAddProductSuccessfully()
{
string onFalseErrorMessage = "The method returned false upon valid data input for creation.";
string onNullMethodReturnErrorMessage = "The shopping cart was not created for the user before his first product.";
string onNullDatabaseReturnErrorMessage = "The product was not added to the shopping cart.";
var context = ApplicationDbContextInMemoryFactory.InitializeContext();
var productService = new Mock <IProductService>();
var shoppingCartService = new ShoppingCartService(context, productService.Object);
// Giving only valid data
var productId = await this.SeedSingleProduct(context);
var userId = await this.SeedSingleUser(context);
var quantity = 2;
var methodResult = await shoppingCartService.AddProductToCart(productId, userId, quantity);
Assert.True(methodResult, onFalseErrorMessage);
// Ensure that the shopping cart is created for the user before adding the first product
var userShoppingCart = await context.ShoppingCarts.FirstOrDefaultAsync(sc => sc.ApplicationUserId == userId);
AssertExtensions.NotNullWithMessage(
userShoppingCart, onNullMethodReturnErrorMessage);
// Ensure that the product has been added to the cart successfully
var productInCart = userShoppingCart.ShoppingCartProducts
.FirstOrDefault(p => p.ProductId == productId && p.Quantity == quantity);
AssertExtensions.NotNullWithMessage(
productInCart, onNullDatabaseReturnErrorMessage);
}
public async Task AddProductToCart_WithInvalidProduct_ShouldReturnFalse()
{
string onTrueErrorMessage = "The method returned true with invalid product.";
var context = ApplicationDbContextInMemoryFactory.InitializeContext();
var productService = new Mock <IProductService>();
var shoppingCartService = new ShoppingCartService(context, productService.Object);
// Not seeding the product
var productId = "FakeProductId";
var userId = await this.SeedSingleUser(context);
var quantity = 2;
var methodResult = await shoppingCartService.AddProductToCart(productId, userId, quantity);
Assert.False(methodResult, onTrueErrorMessage);
}