public async System.Threading.Tasks.Task SuppliersEditAsync()
        {
            //Arrange
            var controller = new NorthwindWeb.Controllers.SuppliersController();

            //Act
            var view = await controller.Edit(1);

            var view1 = await controller.Edit(int.MaxValue);

            var view2 = await controller.Edit(-1);

            //Assert
            Assert.IsNotNull(view);
            Assert.IsNotNull(view1);
            Assert.IsNotNull(view2);
            controller.Dispose();
        }
        public async System.Threading.Tasks.Task SuppliersEditItemAsync()
        {
            //Arrange
            //init
            var controller = new NorthwindWeb.Controllers.SuppliersController();
            var db         = new NorthwindDatabase();
            //create Suppliers
            var Suppliers = new Suppliers()
            {
                CompanyName = "TestSuppliersCreate",
                ContactName = "contact",
            };

            db.Entry(Suppliers).State = System.Data.Entity.EntityState.Added;
            db.SaveChanges();
            //detach Suppliers from db
            db.Entry(Suppliers).State = System.Data.Entity.EntityState.Detached;
            db.SaveChanges();
            //edit name of Suppliers
            string name         = Suppliers.CompanyName;
            string nameExpected = "test1223";

            Suppliers.CompanyName = nameExpected;

            //Act
            //run controller action
            await controller.Edit(Suppliers);

            controller.Dispose();
            string actual = db.Suppliers.Where(x => x.SupplierID == Suppliers.SupplierID).First().CompanyName;

            //Assert
            //check and delete Suppliers
            Assert.AreEqual(nameExpected, actual);
            Suppliers                 = db.Suppliers.Where(x => x.SupplierID == Suppliers.SupplierID).First();
            Suppliers.CompanyName     = name;
            db.Entry(Suppliers).State = System.Data.Entity.EntityState.Deleted;
            db.SaveChanges();
            db.Dispose();
        }