public void CheckIfChangeCarDetailsActuallyChangesTheDetails() { var dbContext = new AutomobileDbContext(); var service = new CarsService(dbContext); var carFromDb = dbContext.CarOffers.FirstOrDefault(); VisualizeCarDetailsViewModel model = new VisualizeCarDetailsViewModel() { Id = carFromDb.Id, Type = "New", Make = "Audi", Model = "Q7", Kilometers = 150, FuelType = "Diesel", HorsePower = 150, EngineSize = 1500, Gearbox = "Automatic", Price = 5000, Doors = "2", Color = "black", Year = 2000, Description = "testt" }; service.ChangeCarDetails(model); var priceAfterChangeCarDetails = carFromDb.Price; Assert.Equal(priceAfterChangeCarDetails, model.Price); }