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+;;; erc-scenarios-base-auto-recon.el --- auto-recon scenarios -*- lexical-binding: t -*-
+
+;; Copyright (C) 2023 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