public function testAllowsSpecifyingPluginLoadersViaConfiguration()
 {
     $this->config['plugin_loader'] = array('device' => 'Zend_Http_TestAsset_TestPluginLoader', 'storage' => 'Zend_Http_TestAsset_TestPluginLoader');
     $ua = new Zend_Http_UserAgent($this->config);
     $deviceLoader = $ua->getPluginLoader('device');
     $this->assertType('Zend_Http_TestAsset_TestPluginLoader', $deviceLoader);
     $storageLoader = $ua->getPluginLoader('storage');
     $this->assertType('Zend_Http_TestAsset_TestPluginLoader', $storageLoader);
     $this->assertNotSame($deviceLoader, $storageLoader);
 }