public async Task AddDiscount_IsSuccess()
{
var discount = new DiscountDTO()
{
ProductSKU = "TST_A01",
Quantity = 3,
Price = 2
};
var result = await controller.PostAsync(discount);
Assert.IsInstanceOfType(result, typeof(CreatedNegotiatedContentResult <DiscountDTO>));
var response = result as CreatedNegotiatedContentResult <DiscountDTO>;
Assert.IsNotNull(response.Content);
Assert.IsNotNull(response.Content.Id);
Assert.AreEqual(discount.ProductSKU, response.Content.ProductSKU);
Assert.AreEqual(discount.Quantity, response.Content.Quantity);
Assert.AreEqual(discount.Price, response.Content.Price);
}