$this->assertEqual($this->drupalGetHeader('X-Drupal-Cache'), $hit_or_miss, $message);
if ($hit_or_miss === 'HIT' && is_array($tags)) {
$this->assertEqual($this->drupalGetHeader('X-Drupal-Cache'), $hit_or_miss, $message);
if ($hit_or_miss === 'HIT' && is_array($tags)) {