public void TodoToDown()
{
var todoController = new TodoController(this.dbcontex.Object);
todoController.ReOrderTodosRowSort(this.dbcontex.Object.Todo.ToList(), 0, 4);
int todoOrder = this.dbcontex.Object.Todo.Where(t => t.Id == 1).Single().Order;
Assert.AreEqual(4, todoOrder);
}