public ViewResult Checkout(Cart cart, ShippingDetails shippingDetails)
{
if (cart.Lines.Count() == 0)
{
ModelState.AddModelError("", "Sorry, your cart is empty!");
}
if (ModelState.IsValid)
{
orderProcessor.ProcessOrder(cart, shippingDetails);
cart.Clear();
return View("Completed");
}
else
{
return View(shippingDetails);
}
}
public void Cannot_Checkout_Empty_Cart()
{
// Arrange - create a mock order processor
Mock<IOrderProcessor> mock = new Mock<IOrderProcessor>();
// Arrange - create an empty cart
Cart cart = new Cart();
// Arrange - create shipping details
ShippingDetails shippingDetails = new ShippingDetails();
// Arrange - create an instance of the controller
CartController target = new CartController(null, mock.Object);
// Act
ViewResult result = target.Checkout(cart, shippingDetails);
// Assert - check that the order hasn't been passed on to the processor
mock.Verify(m => m.ProcessOrder(It.IsAny<Cart>(), It.IsAny<ShippingDetails>()),
Times.Never());
// Assert - check that the method is returning the default view
Assert.AreEqual("", result.ViewName);
// Assert - check that I am passing an invalid model to the view
Assert.AreEqual(false, result.ViewData.ModelState.IsValid);
}
