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;;; erc-scenarios-scrolltobottom-relaxed.el --- erc-scrolltobottom-all relaxed -*- 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/>.
;; TODO assert behavior of prompt input spanning multiple lines, with
;; and without line endings.
;;; Code:
(require 'ert-x)
(eval-and-compile
(let ((load-path (cons (ert-resource-directory) load-path)))
(require 'erc-scenarios-common)))
(require 'erc-goodies)
(ert-deftest erc-scenarios-scrolltobottom--relaxed ()
:tags `(:expensive-test
,@(and (getenv "ERC_TESTS_GRAPHICAL") '(:erc--graphical)))
(when (version< emacs-version "29") (ert-skip "Times out"))
(should-not erc-scrolltobottom-all)
(erc-scenarios-common-with-noninteractive-in-term
((erc-scenarios-common-dialog "scrolltobottom")
(dumb-server (erc-d-run "localhost" t 'help))
(port (process-contact dumb-server :service))
(erc-modules `(scrolltobottom fill-wrap ,@erc-modules))
(erc-scrolltobottom-all 'relaxed)
(erc-server-flood-penalty 0.1)
(expect (erc-d-t-make-expecter))
lower upper)
(ert-info ("Connect")
(with-current-buffer (erc :server "127.0.0.1"
:port port
:full-name "tester"
:nick "tester")
(funcall expect 10 "debug mode")))
(with-current-buffer "foonet"
(should (looking-at " and"))
(set-window-buffer nil (current-buffer))
(delete-other-windows)
(split-window-below 15)
(recenter 0)
(ert-info ("Moving into prompt does not trigger scroll")
(with-selected-window (next-window)
(should-not (erc-scenarios-common--at-win-end-p))
(recenter 0)
(goto-char (1- erc-insert-marker))
(execute-kbd-macro "\C-n")
(should-not (erc-scenarios-common--at-win-end-p))
(should (= (point) (point-max)))
(setq lower (count-screen-lines (window-start) (window-point)))))
(ert-info ("Module `move-to-prompt' still works")
;; Prompt is somewhere in the middle of the window.
(should (erc-scenarios-common--above-win-end-p))
(should-not (= (point-max) (point)))
;; Hitting a self-insert key triggers `move-to-prompt' but not
;; a scroll (to bottom).
(execute-kbd-macro "hi")
;; Prompt and input appear on same line.
(should (= (point-max) (point)))
(setq upper (count-screen-lines (window-start) (window-point)))
(should-not (= upper (window-body-height))))
(ert-info ("Command `recenter-top-bottom' allowed at prompt")
;; Hitting C-l recenters the window.
(should (= upper (count-screen-lines (window-start) (window-point))))
(let ((lines (list upper)))
(erc-scenarios-common--recenter-top-bottom)
(push (count-screen-lines (window-start) (window-point)) lines)
(erc-scenarios-common--recenter-top-bottom)
(push (count-screen-lines (window-start) (window-point)) lines)
(erc-scenarios-common--recenter-top-bottom)
(push (count-screen-lines (window-start) (window-point)) lines)
(setq lines (delete-dups lines))
(should (= (length lines) 4))))
(ert-info ("Command `beginning-of-buffer' allowed at prompt")
;; Hitting C-< goes to beginning of buffer.
(execute-kbd-macro "\M-<")
(should (= 1 (point)))
(redisplay)
(should (zerop (count-screen-lines (window-start) (window-point))))
(should (erc-scenarios-common--prompt-past-win-end-p)))
(ert-info ("New message doesn't trigger scroll when away from prompt")
;; Arriving insertions don't trigger a scroll when away from the
;; prompt. New output not seen.
(erc-cmd-MSG "NickServ help register")
(save-excursion (erc-d-t-search-for 10 "End of NickServ"))
(should (= 1 (point)))
(should (zerop (count-screen-lines (window-start) (window-point))))
(should (erc-scenarios-common--prompt-past-win-end-p)))
(ert-info ("New insertion keeps prompt stationary in other window")
(let ((w (next-window)))
;; We're at prompt and completely stationary.
(should (>= (window-point w) erc-input-marker))
(erc-d-t-wait-for 10
(= lower (count-screen-lines (window-start w) (window-point w))))
(erc-d-t-ensure-for 0.5
(= lower (count-screen-lines (window-start w)
(window-point w))))))
(should (= 2 (length (window-list))))
(ert-info ("New message does not trigger a scroll when at prompt")
;; Recenter so prompt is above rather than at window's end.
(funcall expect 10 "End of NickServ HELP")
(recenter 0)
(set-window-point nil (point-max))
(setq upper (count-screen-lines (window-start) (window-point)))
;; Prompt is somewhere in the middle of the window.
(erc-d-t-wait-for 10 (erc-scenarios-common--above-win-end-p))
(erc-scenarios-common-say "/msg NickServ help identify")
;; New arriving messages don't move prompt.
(erc-d-t-ensure-for 1
(= upper (count-screen-lines (window-start) (window-point))))
(funcall expect 10 "IDENTIFY lets you login")))))
;;; erc-scenarios-scrolltobottom-relaxed.el ends here
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