Add a functional test case for SSH2 login using Agent.

tests/Functional/Net/SSH2AgentTest.php

@@ -0,0 +1,31 @@
+<?php
+
+/**
+ * @author    Andreas Fischer <bantu@phpbb.com>
+ * @copyright 2014 Andreas Fischer
+ * @license   http://www.opensource.org/licenses/mit-license.html  MIT License
+ */
+
+class Functional_Net_SSH2AgentTest extends PhpseclibFunctionalTestCase
+{
+    public static function setUpBeforeClass()
+    {
+        if (!isset($_SERVER['SSH_AUTH_SOCK'])) {
+            self::markTestSkipped(
+                'This test requires an SSH Agent (SSH_AUTH_SOCK env variable).'
+            );
+        }
+        parent::setUpBeforeClass();
+    }
+
+    public function testAgentLogin()
+    {
+        $ssh = new Net_SSH2($this->getEnv('SSH_HOSTNAME'));
+        $agent = new System_SSH_Agent;
+
+        $this->assertTrue(
+            $ssh->login($this->getEnv('SSH_USERNAME'), $agent),
+            'SSH2 login using Agent failed.'
+        );
+    }
+}