// add item to cart
public void AddItem(Product product, int quantity)
{
CartLine line = lineCollection.Where(p => p.Product.ProductID == product.ProductID)
.FirstOrDefault();
if (line == null)
{
lineCollection.Add(new CartLine { Product = product,
Quantity = quantity });
}
else
{
line.Quantity += quantity;
}
}
public void Can_Add_New_Lines()
{
// Arrange
Product p1 = new Product { ProductID = 1, Name = "P1" };
Product p2 = new Product { ProductID = 2, Name = "P2" };
// Arrange
Cart target = new Cart();
// Act
target.AddItem(p1, 1);
target.AddItem(p2, 1);
CartLine[] results = target.Lines.ToArray();
// Assert
Assert.AreEqual(results.Length, 2);
Assert.AreEqual(results[0].Product, p1);
Assert.AreEqual(results[1].Product, p2);
}
public void Can_Add_Quantity_For_Existing_Lines()
{
// Arrange
Product p1 = new Product { ProductID = 1, Name = "P1" };
Product p2 = new Product { ProductID = 2, Name = "P2" };
// Arrange
Cart target = new Cart();
// Act
target.AddItem(p1, 1);
target.AddItem(p2, 1);
target.AddItem(p1, 10);
CartLine[] results = target.Lines.OrderBy(c => c.Product.ProductID).ToArray();
// Assert
Assert.AreEqual(results.Length, 2);
Assert.AreEqual(results[0].Quantity, 11);
Assert.AreEqual(results[1].Quantity, 1);
}
public void Can_Remove_Line()
{
// Arrange
Product p1 = new Product { ProductID = 1, Name = "P1" };
Product p2 = new Product { ProductID = 2, Name = "P2" };
Product p3 = new Product { ProductID = 3, Name = "P3" };
// Arrange
Cart target = new Cart();
// Arrange
target.AddItem(p1, 1);
target.AddItem(p2, 3);
target.AddItem(p3, 5);
target.AddItem(p2, 1);
// Act
target.RemoveLine(p2);
// Assert
Assert.AreEqual(target.Lines.Where(c => c.Product == p2).Count(), 0);
Assert.AreEqual(target.Lines.Count(), 2);
}
public void Calculate_Cart_Total()
{
// Arrange
Product p1 = new Product { ProductID = 1, Name = "P1", Price = 100M };
Product p2 = new Product { ProductID = 2, Name = "P2" , Price = 50M};
// Arrange
Cart target = new Cart();
// Act
target.AddItem(p1, 1);
target.AddItem(p2, 1);
target.AddItem(p1, 3);
decimal result = target.CalculateTotalValue();
// Assert
Assert.AreEqual(result, 450M);
}
public void Can_Clear_Contents()
{
// Arrange
Product p1 = new Product
{
ProductID = 1,
Name = "P1",
Price = 100M
};
Product p2 = new Product { ProductID = 2, Name = "P2", Price = 50M };
// Arrange
Cart target = new Cart();
// Arrange
target.AddItem(p1, 1);
target.AddItem(p2, 1);
// Act
target.Clear();
// Assert
Assert.AreEqual(target.Lines.Count(), 0);
}
public void RemoveLine(Product product)
{
lineCollection.RemoveAll(l => l.Product.ProductID == product.ProductID);
}
