We would strongly recommend implementing this extension in a development environment before putting it live.
You need to set up the Woocommerce store to use the test account details as supplied by the Lloyds Cardnet team.
We would also recommend that you set up the “test” Ingenico back office and enable the test mode within the settings page. The Ingenico test environment looks like this:
You can then use the following test-card numbers to make sure that a transaction fully completes.
Visa 4444 3333 2222 1111
MasterCard 5399 9999 9999 9999
Expiry date (mm/yyyy): Any in date
Card verification code: 123
For other test cards that you could use, please do refer to this link.