The Test Mode payment gateway provides a simple method for testing your WordPress/Shopp setup. With Test Mode set as your primary payment gateway, Shopp will process each checkout request as a normal order, but it will not verify any payment card information. In the Shopp Setup → Payments screen, simply select Test Mode from the Payment Gateway drop-down menu.
Note: It is important to realize that the Test Mode payment gateway is different from the Enable test mode setting available on many of the other payment gateways. As a payment gateway, it acts like a payment processor without verifying any payment information or processing any transfer of money.
Test error response
The Test Mode payment gateway module has one setting for toggling errors on or off. By default the Test Mode gateway treats every order as a success. Simply toggle on the Test error response setting and the Test Mode gateway will report an error for every order it processes.