code: public function addSearchResult($index, $type, array $documents)
      {
          $result = [
              'took' => 5,
              'timed_out' => false,
              '_shards' => [ 'total' => 5, 'successful' => 5, 'failed' => 0 ],
              'hits' => [
                  'total' => count($documents),
                  'max_score' => 1,
                  'hits' => []
              ]
          ];
  
          foreach ($documents as $document) {
              $result['hits']['hits'][] = [
                  '_index' => $index,
                  '_type' => $type,
                  '_id' => $document['id'],
                  '_score' => 1,
                  '_source' => $document
              ];
          }
  
          return $this->addResult('search', $result);
      }
docs: Add a search result
  
  @param string $index
  @param string $type
  @param array  $documents
  
  @return Client