Once you have successfully configured your Magento Mastercard Payment Gateway Service, a few basic tests should be performed to make sure your implementation is working as expected. The scenarios that follow should be considered the minimum level of testing and MasterCard Payment Gateway Services encourage the creation of your own test scenarios that suit your specific business needs.
To access the MasterCard Payment Gateway test simulator, ensure gateway mode is set to TEST. The test simulator is configured to generate predictable results based on the transaction request and card details you supply.
You can trigger specific transaction responses, for example the MasterCard Payment Gateway Response Code and Card Security Code validation, as well as Address Verification response codes. You can also test features like Risk Management and Wallet functionality. Details of test cards can be found here.