/**
  * Does a little prep on a result oject, applies highlighting if exists, and adds to result array.
  * @param  WikiaSearchResult $result
  * @throws WikiaException
  * @return WikiaSearchResultSet provides fluent interface
  */
 private function addResult(WikiaSearchResult $result)
 {
     if ($this->isValidResult($result)) {
         $id = $result['id'];
         if ($this->highlightingObject !== null && ($hlResult = $this->highlightingObject->getResult($id)) && ($field = $hlResult->getField(WikiaSearch::field('html')))) {
             $result->setText($field[0]);
         }
         if ($result['created'] !== null && $this->wg->Lang) {
             $result->setVar('created', $result['created'])->setVar('fmt_timestamp', $this->wg->Lang->date(wfTimestamp(TS_MW, $result['created'])));
             if ($result->getVar('fmt_timestamp')) {
                 $result->setVar('created_30daysago', time() - strtotime($result['created']) > 2592000);
             }
         }
         $result->setVar('categories', $result[WikiaSearch::field('categories')] ?: 'NONE')->setVar('cityArticlesNum', $result['wikiarticles'])->setVar('wikititle', $result[WikiaSearch::field('wikititle')]);
         $this->results[$id] = $result;
     } else {
         throw new WikiaException('Invalid result in set');
     }
     return $this;
 }
 public function testGetInvalidResult()
 {
     $this->assertEquals(null, $this->_result->getResult('invalid'));
 }