public function testGetCustomerIds()
 {
     $client = new Client();
     $result = $client->GetCustomerProfileIds(array('merchantAuthentication' => array('name' => AUTHORIZENET_API_LOGIN_ID, 'transactionKey' => AUTHORIZENET_TRANSACTION_KEY)));
     $customer_ids = $result->GetCustomerProfileIdsResult->ids->long;
     $this->assertTrue(is_array($customer_ids));
 }