public void GetMultimediaVM() { var service = BuildInMemoryDBProvider(); using (var dbContext = service.GetService <DatabaseContext>()) { //Arrange var multimediaApple = new Multimedia() { Id = 1, USBType = "Lighting", Bluetooth = true, NFC = true, FingerPrintReader = true, LTE = true, GPS = true, WiFiCalling = false }; var iPhone12 = new MobilePhone() { Id = 1, Brand = "Apple", Name = "iPhone 12", Price = 3000, ShortDescription = "short", Description = "description", ActiveStatus = true, QuantityInStack = QuantityStatus.Full, MainImage = "/Apple/iPhone 12/Main.png", FirstImage = "/Apple/iPhone 12/First.png", SecondImage = "/Apple/iPhone 12/Second.png", Multimedia = multimediaApple, BestSeller = true }; var configuration = new MapperConfiguration(cfg => { cfg.CreateMap <Multimedia, MultimediaVM>(); }); var mapper = new Mapper(configuration); var mobilePhoneRepository = new MobilePhoneRepository(dbContext); var mobilePhoneService = new MobilePhoneService(mobilePhoneRepository, mapper); //Act var result = mobilePhoneService.GetMultimediaVM(iPhone12); //Assert result.Should().BeOfType <MultimediaVM>(); } }