/**
  * @return \Core\Database
  */
 protected static function getClearDatabase()
 {
     $db = new \Core\Database('mysql:host=' . TEST_DB_HOST . ';dbname=' . TEST_DB_NAME . ';charset=utf8', TEST_DB_USER, TEST_DB_PASSWORD, 'appointments', '\\Utility\\DatabaseCreateScript');
     $clearScript = new \Helpers\TablesClearScript();
     foreach ($clearScript as $statement) {
         $db->exec($statement, array());
     }
     return $db;
 }