public function testNonExistantCustomItemFieldWithRoutedItemInterface()
{
$feed = $this->manager->get('article');
$feed->add(new FakeRoutedItemInterfaceEntity());
$feed->addItemField(new ItemField('fake_custom', 'getFeedDoNotExistsItemCustomMethod'));
$this->setExpectedException('InvalidArgumentException', 'Method "getFeedDoNotExistsItemCustomMethod" should be defined in your entity.');
$feed->render('rss');
}