public void AddNewRangeTest() { var roomA = _romTypeRepository.Get(s => s.RoomTypeName == "Room Type A"); var rooms = new List <Room> { new Room { RoomCode = "R0011", Description = "Room demo", RoomTypeId = roomA.Id }, new Room { RoomCode = "R0012", Description = "Room demo", RoomTypeId = roomA.Id }, }; rooms.ForEach(s => s.Created(Guid.NewGuid())); _roomRepository.AddRange(rooms); Assert.True(_context.SaveChangesAsync().Result); }