public void GetImageId_Positive()
        {
            int   roomId = 10;
            Image image  = new Image()
            {
                ImageId   = 10,
                RoomId    = 12,
                RoomImage = new byte[1] {
                    Convert.ToByte(12)
                }
            };

            //var imageList = new List<Image>();
            //imageList.Add(image);
            var MockRoomBusiness = new Mock <RoomManager>();

            MockRoomBusiness.Setup(p => p.GetImagesId(roomId)).Returns(image.RoomImage);
            RoomsController roomsController  = new RoomsController(MockRoomBusiness.Object);
            var             actualReturnType = roomsController.GetImageById(roomId);

            Assert.ReferenceEquals(image.RoomImage, actualReturnType.GetHashCode());
        }