$xpath = $this->xpath("//meta[@name='keywords']");
$this->assertEqual(count($xpath), 1);
$this->assertEqual((string) $xpath[0]->attributes()['content'], 'test');
$xpath = $this->xpath("//meta[@name='keywords']");
$this->assertEqual(count($xpath), 1);
$this->assertEqual((string) $xpath[0]->attributes()['content'], 'test');