public void TestDeleteConfirmedRedirect()
{
// Arrange
BookController controller = new BookController();
// Act
var bookList = db.BookTbls.ToList();
Random rnd = new Random();
int r = rnd.Next(1, bookList.Count);
var selectedId = bookList[r].Id;
var result = controller.DeleteConfirmed(selectedId) as RedirectToRouteResult;
// Assert
Assert.AreEqual("Index", result.RouteValues["action"].ToString());
}