Braintree.Tests.Integration.TransactionIntegrationTest.Sale_WithValidationError C# (CSharp) Method

        public void Sale_WithValidationError()
        {
            TransactionRequest request = new TransactionRequest
            {
                CreditCard = new TransactionCreditCardRequest
                {
                    ExpirationMonth = "05",
                    ExpirationYear = "2010"
                },
                BillingAddress = new AddressRequest
                {
                    CountryName = "zzzzzz",
                    CountryCodeAlpha2 = "zz",
                    CountryCodeAlpha3 = "zzz",
                    CountryCodeNumeric = "000"
                },
                ShippingAddress = new AddressRequest
                {
                    CountryName = "zzzzz",
                    CountryCodeAlpha2 = "zz",
                    CountryCodeAlpha3 = "zzz",
                    CountryCodeNumeric = "000"
                }
            };

            Result<Transaction> result = gateway.Transaction.Sale(request);
            Assert.IsFalse(result.IsSuccess());
            Assert.IsNull(result.Target);
            Assert.IsNull(result.Transaction);
            Assert.IsNull(result.CreditCardVerification);

            Assert.AreEqual(ValidationErrorCode.TRANSACTION_AMOUNT_IS_REQUIRED, result.Errors.ForObject("Transaction").OnField("Amount")[0].Code);
            Assert.AreEqual(
                ValidationErrorCode.ADDRESS_COUNTRY_CODE_ALPHA2_IS_NOT_ACCEPTED,
                result.Errors.ForObject("Transaction").ForObject("Billing").OnField("CountryCodeAlpha2")[0].Code
            );
            Assert.AreEqual(
                ValidationErrorCode.ADDRESS_COUNTRY_CODE_ALPHA3_IS_NOT_ACCEPTED,
                result.Errors.ForObject("Transaction").ForObject("Billing").OnField("CountryCodeAlpha3")[0].Code
            );
            Assert.AreEqual(
                ValidationErrorCode.ADDRESS_COUNTRY_CODE_NUMERIC_IS_NOT_ACCEPTED,
                result.Errors.ForObject("Transaction").ForObject("Billing").OnField("CountryCodeNumeric")[0].Code
            );
            Assert.AreEqual(
                ValidationErrorCode.ADDRESS_COUNTRY_NAME_IS_NOT_ACCEPTED,
                result.Errors.ForObject("Transaction").ForObject("Billing").OnField("CountryName")[0].Code
            );

            Dictionary<string, string> parameters = result.Parameters;
            Assert.IsFalse(parameters.ContainsKey("transaction[amount]"));
            Assert.AreEqual("05", parameters["transaction[credit_card][expiration_month]"]);
            Assert.AreEqual("2010", parameters["transaction[credit_card][expiration_year]"]);
        }