public async Task GetTaxes_Valid_Data_US() { // arrage var taxesRequest = new TaxesRequest() { FromCountry = "US", FromZip = "07001", FromState = "NJ", ToCountry = "US", ToZip = "07446", ToState = "NJ", Amount = 16.50, Shipping = 1.5, LineItems = new List <GetTaxesRequestLineItem>() { new GetTaxesRequestLineItem { Quantity = 1, UnitPrice = 15.0, ProductTaxCode = "31000" } } }; var expectedAmountToCollect = 1.09; var expectedTaxableAmount = 16.5; // act var taxesResponse = await taxCalculator.GetTaxesForOrder(taxesRequest); // assert Assert.AreEqual(expectedAmountToCollect, taxesResponse.AmountToCollect); Assert.AreEqual(expectedTaxableAmount, taxesResponse.TaxableAmount); }