Nuget包上Paypal Sandbox的负面测试

Question

I am trying to figure out how to do negative testing on the PayPal sandbox using the Nuget package from https://github.com/paypal/PayPal-NET-SDK

I am using the call payment.Create(apiContext) and would like to test all the conditions for the errors.

I referred to the documents in https://www.paypal.com/us/smarthelp/article/how-do-i-test-failed-transactions-in-the-paypal-sandbox-ts1259 but explains how to add request headers to the REST calls. I do not find such methods on the c# SDK.

any pointers will be helpful and appreciated.

Answer 1

There is no an official way to test negative conditions via .NET or java SDK. Official documentation offers negative conditions only for REST and SOAP calls here .

By the way I have been able to rise an error condition in this way:

1. Be sure your sandbox payer account has money enough to pay your item and keep a browser page open on 'edit payer account' page in your paypal development dashboard

2. Prepare the payment for the user and test it till the moment the sandbox payer arrive to the last step before paying

3. On the 'edit payer account' page (see pt. 1) edit the available amount of the payer to a value lesser than the amount to pay (eg 1.0)

4. Return to the payer page (see pt. 2) and press the 'continue' button. Payment will fail with the code :

   INSTRUMENT_DECLINED - The instrument presented was either declined by the processor or bank, or it can't be used for this payment.