public void Can_Filter_Products()
        {
            SetSessopmVars();

            // Arrange
            // - create the mock repository
            Mock<IProductRepository> mock = new Mock<IProductRepository>();
            mock.Setup(m => m.Products).Returns(new Product[] {
                new Product {ProductID = 1, Name = "P1", Category = "Cat1"},
                new Product {ProductID = 2, Name = "P2", Category = "Cat2"},
                new Product {ProductID = 3, Name = "P3", Category = "Cat1"},
                new Product {ProductID = 4, Name = "P4", Category = "Cat2"},
                new Product {ProductID = 5, Name = "P5", Category = "Cat3"}
            });

            // Arrange - create a controller and make the page size 3 items
            ProductController controller = new ProductController(mock.Object);
            controller.PageSize = 3;

            // Action
            Product[] result = ((ProductsListViewModel)controller.List("Cat2", 1).Model)
                .Products.ToArray();

            // Assert
            Assert.AreEqual(result.Length, 2);
            Assert.IsTrue(result[0].Name == "P2" && result[0].Category == "Cat2");
            Assert.IsTrue(result[1].Name == "P4" && result[1].Category == "Cat2");
        }
        public void Can_Send_Pagination_View_Model()
        {
            SetSessopmVars();

            // Arrange
            Mock<IProductRepository> mock = new Mock<IProductRepository>();
            mock.Setup(m => m.Products).Returns(new Product[] {
                new Product {ProductID = 1, Name = "P1"},
                new Product {ProductID = 2, Name = "P2"},
                new Product {ProductID = 3, Name = "P3"},
                new Product {ProductID = 4, Name = "P4"},
                new Product {ProductID = 5, Name = "P5"}
            });

            // Arrange
            ProductController controller = new ProductController(mock.Object);
            controller.PageSize = 3;

            // Act
            ProductsListViewModel result
                = (ProductsListViewModel)controller.List(null, 2).Model;

            // Assert
            PagingInfo pageInfo = result.PagingInfo;
            Assert.AreEqual(pageInfo.CurrentPage, 2);
            Assert.AreEqual(pageInfo.ItemsPerPage, 3);
            Assert.AreEqual(pageInfo.TotalItems, 5);
            Assert.AreEqual(pageInfo.TotalPages, 2);
        }
        public void Generate_Category_Specific_Product_Count()
        {
            SetSessopmVars();

            // Arrange
            // - create the mock repository
            Mock<IProductRepository> mock = new Mock<IProductRepository>();
            mock.Setup(m => m.Products).Returns(new Product[] {
                new Product {ProductID = 1, Name = "P1", Category = "Cat1", Quantity=1},
                new Product {ProductID = 2, Name = "P2", Category = "Cat2", Quantity=1},
                new Product {ProductID = 3, Name = "P3", Category = "Cat1", Quantity=1},
                new Product {ProductID = 4, Name = "P4", Category = "Cat2", Quantity=1},
                new Product {ProductID = 5, Name = "P5", Category = "Cat3", Quantity=1}
            });

            // Arrange - create a controller and make the page size 3 items
            ProductController target = new ProductController(mock.Object);
            target.PageSize = 3;

            // Action - test the product counts for different categories
            int res1 = ((ProductsListViewModel)target
                .List("Cat1").Model).PagingInfo.TotalItems;
            int res2 = ((ProductsListViewModel)target
                .List("Cat2").Model).PagingInfo.TotalItems;
            int res3 = ((ProductsListViewModel)target
                .List("Cat3").Model).PagingInfo.TotalItems;
            int resAll = ((ProductsListViewModel)target
                .List(null).Model).PagingInfo.TotalItems;

            // Assert
            Assert.AreEqual(res1, 2);
            Assert.AreEqual(res2, 2);
            Assert.AreEqual(res3, 1);
            Assert.AreEqual(resAll, 5);
        }
        public void Can_Paginate()
        {
            SetSessopmVars();

            // Arrange
            Mock<IProductRepository> mock = new Mock<IProductRepository>();
            mock.Setup(m => m.Products).Returns(new Product[] {
                new Product {ProductID = 1, Name = "P1"},
                new Product {ProductID = 2, Name = "P2"},
                new Product {ProductID = 3, Name = "P3"},
                new Product {ProductID = 4, Name = "P4"},
                new Product {ProductID = 5, Name = "P5"}
            });

            // create a controller and make the page size 3 items
            ProductController controller = new ProductController(mock.Object);
            controller.PageSize = 3;

            // Act
            ProductsListViewModel result
                = (ProductsListViewModel)controller.List(null, 2).Model;

            // Assert
            Product[] prodArray = result.Products.ToArray();
            Assert.IsTrue(prodArray.Length == 2);
            Assert.AreEqual(prodArray[0].Name, "P4");
            Assert.AreEqual(prodArray[1].Name, "P5");
        }