message: Fix improve the test.
diff: @@ -587,7 +587,7 @@ static void php_swoole_socket_set_ssl(Socket *cli, zval *zset)
  {
  sw_free(cli->ssl_option.cert_file);
  }
  - if (access(cli->ssl_option.cert_file, R_OK) == 0)
  + if (access(str_v.val(), R_OK) == 0)
  {
  cli->ssl_option.cert_file = str_v.dup();
  }
  @@ -603,7 +603,7 @@ static void php_swoole_socket_set_ssl(Socket *cli, zval *zset)
  {
  sw_free(cli->ssl_option.key_file);
  }
  - if (access(cli->ssl_option.key_file, R_OK) == 0)
  + if (access(str_v.val(), R_OK) == 0)
  {
  cli->ssl_option.key_file = str_v.dup();
  }
  