public function testRenderItem()
{
$feed = $this->manager->get('article');
$feed->add(new FakeItemInterfaceEntity());
$output = $feed->render('rss');
$this->assertContains('<title><![CDATA[Fake title]]></title>', $output);
$this->assertContains('<description><![CDATA[Fake description or content]]></description>', $output);
$this->assertContains('<link>http://github.com/eko/FeedBundle/article/fake/url</link>', $output);
}