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;;; erc-scenarios-base-auto-recon.el --- auto-recon scenarios -*- lexical-binding: t -*-
;; Copyright (C) 2023-2025 Free Software Foundation, Inc.
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Code:
(require 'ert-x)
(eval-and-compile
(let ((load-path (cons (ert-resource-directory) load-path)))
(require 'erc-scenarios-common)))
(defun erc-scenarios-base-auto-recon--get-unused-port ()
(let ((server (make-network-process :name "*erc-scenarios-base-auto-recon*"
:host "localhost"
:service t
:server t)))
(delete-process server)
(process-contact server :service)))
;; This demos one possible flavor of intermittent service.
;; It may end up needing to be marked :unstable.
(ert-deftest erc-scenarios-base-auto-recon-unavailable ()
:tags '(:expensive-test)
(erc-scenarios-common-with-cleanup
((erc-server-flood-penalty 0.1)
(port (erc-scenarios-base-auto-recon--get-unused-port))
(erc--server-reconnect-timeout-scale-function (lambda (_) 1))
(erc-server-auto-reconnect t)
(erc-server-reconnect-function #'erc-server-delayed-check-reconnect)
(expect (erc-d-t-make-expecter))
(erc-scenarios-common-dialog "base/reconnect")
(dumb-server nil))
(ert-info ("Dialing fails: nobody home")
(with-current-buffer (erc :server "127.0.0.1"
:port port
:nick "tester"
:full-name "tester")
(erc-d-t-wait-for 10 (not (erc-server-process-alive)))
(erc-d-t-wait-for 10 erc--server-reconnect-timer)
(funcall expect 10 "Opening connection")
(funcall expect 10 "failed")
(ert-info ("Reconnect function freezes attempts at 1")
(funcall expect 10 '(: "reconnecting" (+ nonl) "attempt 1/2"))
(funcall expect 10 "nobody home")
(funcall expect 10 '(: "reconnecting" (+ nonl) "attempt 1/2"))
(funcall expect 10 "nobody home"))))
(ert-info ("Service appears")
(setq dumb-server (erc-d-run "localhost" port
'just-eof 'unexpected-disconnect))
(with-current-buffer (format "127.0.0.1:%d" port)
(funcall expect 10 "server is in debug mode")
(should (equal (buffer-name) "FooNet"))))
(ert-info ("Service interrupted, reconnect starts again")
(with-current-buffer "FooNet"
(funcall expect 10 "failed")
(funcall expect 10 '(: "reconnecting" (+ nonl) "attempt 1/2"))))
(ert-info ("Service restored")
(delete-process dumb-server)
(setq dumb-server (erc-d-run "localhost" port
'just-eof 'unexpected-disconnect))
(with-current-buffer "FooNet"
(funcall expect 10 "server is in debug mode")))
(ert-info ("Service interrupted a third time, reconnect starts yet again")
(with-current-buffer "FooNet"
(funcall expect 10 "failed")
(funcall expect 10 '(: "reconnecting" (+ nonl) "attempt 1/2"))
(erc-cmd-RECONNECT "cancel")
(funcall expect 10 "canceled")))))
;; In this test, a listener accepts but doesn't respond to any messages.
(ert-deftest erc-scenarios-base-auto-recon-no-proto ()
:tags '(:expensive-test)
(erc-scenarios-common-with-cleanup
((erc-server-flood-penalty 0.1)
(erc-scenarios-common-dialog "base/reconnect")
(erc-d-auto-pong nil)
(dumb-server (erc-d-run "localhost" t 'unexpected-disconnect))
(port (process-contact dumb-server :service))
(erc--server-reconnect-timeout-scale-function (lambda (_) 1))
(erc--server-reconnect-timeout-check 0.5)
(erc-server-auto-reconnect t)
(erc-server-reconnect-function #'erc-server-delayed-check-reconnect)
(expect (erc-d-t-make-expecter)))
(ert-info ("Session succeeds but cut short")
(with-current-buffer (erc :server "127.0.0.1"
:port port
:nick "tester"
:full-name "tester")
(funcall expect 10 "server is in debug mode")
(should (equal (buffer-name) "FooNet"))
(erc-d-t-wait-for 10 erc--server-reconnect-timer)
(delete-process dumb-server)
(funcall expect 10 "failed")
(ert-info ("Reconnect function freezes attempts at 1")
(funcall expect 10 '(: "reconnecting" (+ nonl) "attempt 1/2"))
(funcall expect 10 "nobody home")
(funcall expect 10 "timed out while dialing")
(funcall expect 10 '(: "reconnecting" (+ nonl) "attempt 1/2"))
(funcall expect 10 "nobody home"))))
(ert-info ("Service restored")
(setq dumb-server (erc-d-run "localhost" port
'just-ping
'ping-pong
'unexpected-disconnect))
(with-current-buffer "FooNet"
(funcall expect 30 "server is in debug mode")))
(ert-info ("Service interrupted again, reconnect starts again")
(with-current-buffer "FooNet"
(funcall expect 10 "failed")
(funcall expect 10 '(: "reconnecting" (+ nonl) "attempt 1/2"))
(erc-cmd-RECONNECT "cancel")
(funcall expect 10 "canceled")))))
;;; erc-scenarios-base-auto-recon.el ends here
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