Test fetching functionality.
public function testfetch() {
// Create feed with local url.
$feed = $this
->createFeed();
$this
->updateFeedItems($feed);
$this
->assertFalse(empty($feed->items));
// Remove items and restore checked property to 0.
$this
->removeFeedItems($feed);
// Change its name and try again.
$feed->title->value = 'Do not fetch';
$feed
->save();
$this
->updateFeedItems($feed);
// Fetch should fail due to feed name.
$this
->assertTrue(empty($feed->items));
}