title: WorldPay Integration
body: <p>I have been asked to set up a demo site which calls out to WorldPay to authorise transactions.  </p>
  
  <p>We won't have a MerchantID or anything like that yet, is there a dummy service that you can call that is either on the internet at-large, or is downloadable and you can install locally?</p>
  
  <p>I've obviously had a look around and so far come up with nothing - it's a straightforward answer so wondering if anyone on here knows off the top of their head?</p>
  
  <p>Thanks</p>