public void MerchantOrder_ItemsShouldHaveAtLeastOneItem()
        {
            MerchantOrder merchantOrderInternal = new MerchantOrder();

            merchantOrderInternal.AppendItem(new Item()
            {
                Description = "Item de compra"
            });

            Assert.AreEqual("Item de compra", merchantOrderInternal.Items.FirstOrDefault().Description);
        }
        public void MerchantOrder_AppendItemShouldBeOk()
        {
            MerchantOrder merchantOrderInternal = new MerchantOrder();

            merchantOrderInternal.Items = new List <Item>();
            merchantOrderInternal.AppendItem(new Item()
            {
            });

            Assert.Pass();
        }