public async Task SaveCustomerTest()
        {
            MerchandiseService merchandiseService = new MerchandiseService();
            MerchandiseDto     merchandiseDto     = new MerchandiseDto("0", "Jajao", "Produkt wiejski", ArticleType.GROCERIES.ToString(), ArticleUnit.PACK.ToString(), 13.20, 0.01);
            await merchandiseService.SaveMerchandise(merchandiseDto);

            List <MerchandiseDto> gotMerchandiseDtos = (await merchandiseService.GetMerchandises()).ToList();

            Assert.AreEqual(1, gotMerchandiseDtos.Count());
        }
        public async Task GetCustomerTest()
        {
            MerchandiseService merchandiseService = new MerchandiseService();
            MerchandiseDto     merchandiseDto     = new MerchandiseDto("0", "Jajao", "Produkt wiejski", ArticleType.GROCERIES.ToString(), ArticleUnit.PACK.ToString(), 13.20, 0.01);
            await merchandiseService.SaveMerchandise(merchandiseDto);

            MerchandiseDto gotMerchandiseDto = await merchandiseService.GetMerchandise("0");

            Assert.IsNotNull(gotMerchandiseDto);
        }
        public void CreateMerchandiseServiceTest()
        {
            MerchandiseService customerService = new MerchandiseService();

            Assert.IsNotNull(customerService);
        }