public void GetRoomTest()
        {
            var           cartRepo = new CartRepo(bookcontextmock.Object);
            CartViewModel temp     = new CartViewModel()
            {
                Name        = "Harry Potter and the Order of Phoenix",
                Price       = 531,
                Description = "5th book of Harry Potter series"
            };
            CartModel temp1 = new CartModel()
            {
                Name        = temp.Name,
                Price       = temp.Price,
                Description = temp.Description
            };
            var roomAdded = cartRepo.AddRoom(temp);

            books.Add(temp1);
            Assert.AreNotEqual(4, books.Count());
            Assert.AreEqual(5, books.Count());
        }