public async Task UpdateDiscount_IsSuccess()
{
var discount = new DiscountDTO()
{
ProductSKU = "TST_A01",
Quantity = 3,
Price = 2
};
var postResult = await controller.PostAsync(discount);
Assert.IsInstanceOfType(postResult, typeof(CreatedNegotiatedContentResult <DiscountDTO>));
var postResponse = postResult as CreatedNegotiatedContentResult <DiscountDTO>;
Assert.IsNotNull(postResponse.Content);
var createdDiscount = postResponse.Content as DiscountDTO;
createdDiscount.Price = 1;
var putResult = await controller.PutAsync(createdDiscount);
var putResponse = putResult as OkNegotiatedContentResult <DiscountDTO>;
Assert.IsNotNull(putResponse.Content);
Assert.IsNotNull(putResponse.Content.Id);
Assert.AreEqual(createdDiscount.ProductSKU, putResponse.Content.ProductSKU);
Assert.AreEqual(createdDiscount.Quantity, putResponse.Content.Quantity);
Assert.AreEqual(createdDiscount.Price, putResponse.Content.Price);
}