a eway testing page has been set up with the eway there is two set of login
1, the eway developer website
https://www.eway.com.au/eway-partner-portal/login
login: kafu@creativecomputing.com.au
password: $C0ntr6l
can find the merchant id of sandbox user in the Resource tab -> sandbox/testing
2, the eway sandbox website
https://sandbox.myeway.com.au/gbc/login.aspx
login: kafu@creativecoputing.com.au.sand
passowrd: $C0ntr6l
can use it to will transaction that come in.