public function setUp()
 {
     $this->request = new PurchaseRequest($this->getHttpClient(), $this->getHttpRequest());
     $this->request->initialize(array('siteId' => '123', 'amount' => '10.00', 'currency' => 'AUD', 'transactionId' => '123456', 'clientIp' => '123.123.123.123', 'card' => $this->getValidCard()));
 }