Test comment rss output.
public function testRssRow() {
$this
->drupalGet('test-comment-rss');
$result = $this
->xpath('//item');
$this
->assertEqual(count($result), 1, 'Just one comment was found in the rss output.');
$this
->assertEqual($result[0]->pubdate, gmdate('r', $this->comment->created->value), 'The right pubDate appears in the rss output.');
}