More details to be added.
For testing procedures, refer to this page: http://www.eway.com.au/Support/Developer/PaymentsRealTime.aspx
The test Credit Card number is 4444333322221111 - this is the only credit card number that will work on the test gateway.
The test Total Amount should end in 00 or 08 to get a successful response (e.g. $10.00 or $10.08) - all other amounts will return a failed response.