public void Book()
      {
         // Arrange
         HomeController controller = new HomeController();

         // Act
         ViewResult result = controller.Book() as ViewResult;

         // Assert
         Assert.IsNotNull(result);
      }
      public void Index()
      {
         // Arrange
         HomeController controller = new HomeController();

         // Act
         ViewResult result = controller.Index() as ViewResult;

         // Assert
         Assert.AreEqual("Modify this template to jump-start your ASP.NET MVC application.", result.ViewBag.Message);
      }