From 6838555dd28d83caab2244d1427e442cb07994de Mon Sep 17 00:00:00 2001
From: Jason Zhu <jasonzhuyq@outlook.com>
Date: Wed, 22 Sep 2021 16:14:07 +1000
Subject: [PATCH] 9.3.5 Completing the Cart Controller; UNIT TEST: ORDER
 PROCESSING

---
 .../SportsStore.UnitTests/CartTests.cs        | 88 ++++++++++++++++++-
 1 file changed, 84 insertions(+), 4 deletions(-)

diff --git a/SportsStore/SportsStore.UnitTests/CartTests.cs b/SportsStore/SportsStore.UnitTests/CartTests.cs
index b2c0381..5540143 100644
--- a/SportsStore/SportsStore.UnitTests/CartTests.cs
+++ b/SportsStore/SportsStore.UnitTests/CartTests.cs
@@ -137,7 +137,7 @@ namespace SportsStore.UnitTests
             Cart cart = new Cart();
 
             // Arrange - create the controller
-            CartController target = new CartController(mock.Object);
+            CartController target = new CartController(mock.Object, null);
 
             // Act - add a product to the cart
             target.AddToCart(cart, 1, null);
@@ -161,7 +161,7 @@ namespace SportsStore.UnitTests
             Cart cart = new Cart();
 
             // Arrange - create the controller
-            CartController target = new CartController(mock.Object);
+            CartController target = new CartController(mock.Object, null);
 
             // Act - add a product to the 
             RedirectToRouteResult result = target.AddToCart(cart, 2, "myUrl");
@@ -178,7 +178,7 @@ namespace SportsStore.UnitTests
             Cart cart = new Cart();
 
             // Arrange - create the controller
-            CartController target = new CartController(null);
+            CartController target = new CartController(null, null);
 
             // Act - call the Index action methdo
             CartIndexViewModel result = (CartIndexViewModel)target.Index(cart, "myUrl").ViewData.Model;
@@ -187,5 +187,85 @@ namespace SportsStore.UnitTests
             Assert.AreSame(result.Cart, cart);
             Assert.AreEqual(result.ReturnUrl, "myUrl");
         }
-}
+
+        [TestMethod]
+        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 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);
+        }
+
+        [TestMethod]
+        public void Cannot_Checkout_Invalid_ShippingDetails()
+        {
+
+            // Arrange - create a mock order processor
+            Mock<IOrderProcessor> mock = new Mock<IOrderProcessor>();
+
+            // Arrange - create a cart with an item
+            Cart cart = new Cart();
+            cart.AddItem(new Product(), 1);
+
+            // Arrange - create an instance of the controller
+            CartController target = new CartController(null, mock.Object); 
+            // use null to inject repo, as we don't need it
+
+            // Arrange - add an error to the model
+            target.ModelState.AddModelError("error", "error");
+
+            // Act - try to checkout
+            ViewResult result = target.Checkout(cart, new 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);
+        }
+
+        [TestMethod]
+        public void Can_Checkout_And_Submit_Order()
+        {
+
+            // Arrange - create a mock order processor
+            Mock<IOrderProcessor> mock = new Mock<IOrderProcessor>();
+
+            // Arrange - create a cart with an item
+            Cart cart = new Cart();
+            cart.AddItem(new Product(), 1);
+
+            // Arrange - create an instance of the controller
+            CartController target = new CartController(null, mock.Object);
+
+            // Act - try to checkout
+            ViewResult result = target.Checkout(cart, new ShippingDetails());
+
+            // Assert - check that the order has been passed on to the processor
+            mock.Verify(m => m.ProcessOrder(It.IsAny<Cart>(), It.IsAny<ShippingDetails>()),
+        Times.Once());
+            // Assert - check that the method is returning the Completed view
+            Assert.AreEqual("Completed", result.ViewName);
+            // Assert - check that I am passing a valid model to the view
+            Assert.AreEqual(true, result.ViewData.ModelState.IsValid);
+        }
+    }
 }