pre-testing  Now you are ready to test what you have done so far. Step 1 - Test Card Number Please use this card number first when testing your system  4111111111111111 This card number and the form action you set up in the Verification page allow you to test against our credit card simulator in the development environment. Step 2 - Test! At this point, you have a set of pages that will allow a user to enter and verify their credit card information, and these pages will send the data to our test server. You have NOT yet set up anything which will inform your systems of this payment. So a test at this point will simply simulate a credit card authorization attemt and place the payment data in the ACS databases. You will get an ACS Systems page that informs you of whether or not the card was authorized or declined, but your systems will not be informed of this. (That step comes later.) Here are a few guidelines to start with: Make sure to test ALL of your fields on the entry page and summary page. Our development server should return an error page informing you of any missing required parameters. Be sure to think about field limits and special characters - how will these affect either your system or the module. The development server should inform you when any values you enter are invalid. Does the Verification page come up after the person has entered their information? Once all these problems are fixed, you should be able to enter CC data and get a page from our server indicating whether or not the card approved or declined. (Our test server will randomly authorize about half the attemts and decline the other half.) After this testing is complete, you are ready for the next step: informing your servers of an authorized credit card payment. Develop a response page  NEXT -->