public void CreateShipmentAddNewShipmentToDataBase() { var optionsBuilder = new DbContextOptionsBuilder <ApplicationDbContext>() .UseInMemoryDatabase("nameOfDatabase"); var db = new ApplicationDbContext(optionsBuilder.Options); var input = new OfferInputModel() { From = 1, To = 17, CountOfPallets = 3, Length = 1.74, Width = 2, Height = 2, Weight = 500, IsExpressDelivery = true, IsFragile = true }; var homeService = new HomeService(db); homeService.CreateShipment(input); int result = db.Shipments.Count(); Assert.Equal(1, result); }