public static function setUpBeforeClass()
 {
     global $phpbb_root_path, $phpEx;
     $setup_extensions = static::setup_extensions();
     $finder = new \phpbb\finder(new \phpbb\filesystem(), $phpbb_root_path, null, $phpEx);
     $finder->core_path('phpbb/db/migration/data/');
     if (!empty($setup_extensions)) {
         $finder->set_extensions($setup_extensions)->extension_directory('/migrations');
     }
     $classes = $finder->get_classes();
     $schema_sha1 = sha1(serialize($classes));
     self::$schema_file = __DIR__ . '/../tmp/' . $schema_sha1 . '.json';
     self::$install_schema_file = __DIR__ . '/../../phpBB/install/schemas/schema.json';
     if (!file_exists(self::$schema_file)) {
         global $table_prefix;
         $db = new \phpbb\db\driver\sqlite();
         $schema_generator = new \phpbb\db\migration\schema_generator($classes, new \phpbb\config\config(array()), $db, new \phpbb\db\tools($db, true), $phpbb_root_path, $phpEx, $table_prefix);
         file_put_contents(self::$schema_file, json_encode($schema_generator->get_schema()));
     }
     copy(self::$schema_file, self::$install_schema_file);
     parent::setUpBeforeClass();
 }