We have created test gateways for all payment module to simulate checkout process.

ccAvenue, PayMate, and Paypal will all redirect to our Gateway simulators.
The payment gateway simulators include the order information similar to what you would see on the official payment gateways.
Credit card information is randomly produced so the tester does not have to find Credit card numbers that will validate.
The response returned is randomly produced. It returns approved, pending, or declined.

Authorized Net requires the credit card information be entered on site on the checkout page.
The response returned is randomly produced. It returns approved, pending, or declined.
Some test credit card numbers are:
378282246310005,  371449635398431              CVV any 4 digit code
4012888888881881, 4111111111111111          CVV any 3 digit code
5555555555554444, 5105105105105100          CVV any 3 digit code
Expiry must be some date in the future.