Add profile option. Closes #4

src/Omnipay/SagePay/Message/ServerAuthorizeRequest.php

@@ -7,12 +7,23 @@
  */
 class ServerAuthorizeRequest extends DirectAuthorizeRequest
 {
+    public function getProfile()
+    {
+        return $this->getParameter('profile');
+    }
+
+    public function setProfile($value)
+    {
+        return $this->setParameter('profile', $value);
+    }
+
     public function getData()
     {
         $this->validate('returnUrl');
 
         $data = $this->getBaseAuthorizeData();
         $data['NotificationURL'] = $this->getReturnUrl();
+        $data['Profile'] = $this->getProfile();
 
         return $data;
     }

tests/Omnipay/SagePay/Message/ServerAuthorizeRequestTest.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace Omnipay\SagePay\Message;
+
+use Omnipay\Tests\TestCase;
+
+class ServerAuthorizeRequestTest extends TestCase
+{
+    public function setUp()
+    {
+        parent::setUp();
+
+        $this->request = new ServerAuthorizeRequest($this->getHttpClient(), $this->getHttpRequest());
+        $this->request->initialize(
+            array(
+                'amount' => '12.00',
+                'transactionId' => '123',
+                'card' => $this->getValidCard(),
+            )
+        );
+    }
+
+    public function testProfile()
+    {
+        $this->assertSame($this->request, $this->request->setProfile('NORMAL'));
+        $this->assertSame('NORMAL', $this->request->getProfile());
+    }
+
+    public function getData()
+    {
+        $data = $this->request->getData();
+
+        $this->assertSame('https://www.example.com/return', $data['NotificationURL']);
+        $this->assertSame('LOW', $data['Profile']);
+    }
+}