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|
;;; erc-scenarios-match.el --- Misc `erc-match' 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)))
(eval-when-compile
(require 'erc-join)
(require 'erc-match))
(require 'erc-stamp)
(require 'erc-fill)
;; This defends against a regression in which all matching by the
;; `erc-match-message' fails when `erc-add-timestamp' precedes it in
;; `erc-insert-modify-hook'. Basically, `erc-match-message' used to
;; expect an `erc-parsed' text property on the first character in a
;; message, which doesn't exist, when the message content is prefixed
;; by a leading timestamp.
(ert-deftest erc-scenarios-match--stamp-left-current-nick ()
:tags '(:expensive-test)
(erc-scenarios-common-with-cleanup
((erc-scenarios-common-dialog "base/reconnect")
(dumb-server (erc-d-run "localhost" t 'unexpected-disconnect))
(port (process-contact dumb-server :service))
(erc-server-flood-penalty 0.1)
(erc-insert-timestamp-function 'erc-insert-timestamp-left)
(expect (erc-d-t-make-expecter)))
(ert-info ("Connect")
(with-current-buffer (erc :server "127.0.0.1"
:port port
:full-name "tester"
:nick "tester")
;; Module `timestamp' follows `match' in insertion hooks.
(should (memq 'erc-add-timestamp
(memq 'erc-match-message
(default-value 'erc-insert-modify-hook))))
;; The "match type" is `current-nick'.
(funcall expect 5 "tester")
(should (eq (get-text-property (1- (point)) 'font-lock-face)
'erc-current-nick-face))))))
;; When hacking on tests that use this fixture, it's best to run it
;; interactively, and visually inspect the output with various
;; combinations of:
;;
;; M-x erc-match-toggle-hidden-fools RET
;; M-x erc-toggle-timestamps RET
;;
(defun erc-scenarios-match--invisible-stamp (hiddenp visiblep)
(unless noninteractive
(push "erc-match-toggle-hidden-fools" extended-command-history)
(push "erc-toggle-timestamps" extended-command-history))
(erc-scenarios-common-with-cleanup
((erc-scenarios-common-dialog "join/legacy")
(dumb-server (erc-d-run "localhost" t 'foonet))
(port (process-contact dumb-server :service))
(erc-server-flood-penalty 0.1)
(erc-timestamp-only-if-changed-flag nil)
(erc-fools '("bob"))
(erc-text-matched-hook '(erc-hide-fools))
(erc-autojoin-channels-alist '((FooNet "#chan")))
(expect (erc-d-t-make-expecter)))
(ert-info ("Connect")
(with-current-buffer (erc :server "127.0.0.1"
:port port
:full-name "tester"
:password "changeme"
:nick "tester")
;; Module `timestamp' follows `match' in insertion hooks.
(should (memq 'erc-add-timestamp
(memq 'erc-match-message
(default-value 'erc-insert-modify-hook))))
(funcall expect 5 "This server is in debug mode")))
(ert-info ("Ensure lines featuring \"bob\" are invisible")
(with-current-buffer (erc-d-t-wait-for 10 (get-buffer "#chan"))
(should (funcall expect 10 "<bob> tester, welcome!"))
(ert-info ("<bob> tester, welcome!") (funcall hiddenp))
;; Alice's is the only one visible.
(should (funcall expect 10 "<alice> tester, welcome!"))
(ert-info ("<alice> tester, welcome!") (funcall visiblep))
(should (funcall expect 10 "<bob> alice: But, as it seems"))
(ert-info ("<bob> alice: But, as it seems") (funcall hiddenp))
(should (funcall expect 10 "<alice> bob: Well, this is the forest"))
(ert-info ("<alice> bob: Well, this is the forest") (funcall hiddenp))
(should (funcall expect 10 "<alice> bob: And will you"))
(ert-info ("<alice> bob: And will you") (funcall hiddenp))
(should (funcall expect 10 "<bob> alice: Live, and be prosperous"))
(ert-info ("<bob> alice: Live, and be prosperous") (funcall hiddenp))
(should (funcall expect 10 "ERC>"))
(should-not (get-text-property (pos-bol) 'invisible))
(should-not (get-text-property (point) 'invisible))))))
;; This asserts that when stamps appear before a message, registered
;; invisibility properties owned by modules span the entire message.
(ert-deftest erc-scenarios-match--stamp-left-fools-invisible ()
:tags '(:expensive-test)
(let ((erc-insert-timestamp-function #'erc-insert-timestamp-left))
(erc-scenarios-match--invisible-stamp
(lambda ()
;; This is a time-stamped message.
(should (eq (field-at-pos (pos-bol)) 'erc-timestamp))
;; Leading stamp has combined `invisible' property value.
(should (equal (get-text-property (pos-bol) 'invisible)
'(match-fools timestamp)))
;; Message proper has the `invisible' property `match-fools'.
(let ((msg-beg (next-single-property-change (pos-bol) 'invisible)))
(should (eq (get-text-property msg-beg 'invisible) 'match-fools))
(should (>= (next-single-property-change msg-beg 'invisible nil)
(pos-eol)))))
(lambda ()
;; This is a time-stamped message.
(should (eq (field-at-pos (pos-bol)) 'erc-timestamp))
(should (get-text-property (pos-bol) 'invisible))
;; The entire message proper is visible.
(let ((msg-beg (next-single-property-change (pos-bol) 'invisible)))
(should
(= (next-single-property-change msg-beg 'invisible nil (pos-eol))
(pos-eol))))))))
;; In most cases, `erc-hide-fools' makes line endings invisible.
(defun erc-scenarios-match--stamp-right-fools-invisible ()
(let ((erc-insert-timestamp-function #'erc-insert-timestamp-right))
(erc-scenarios-match--invisible-stamp
(lambda ()
(pcase-let ((`(,beg . ,end) (erc--get-inserted-msg-bounds)))
;; The end of the message is a newline.
(should (= ?\n (char-after end)))
;; Every message has a trailing time stamp.
(should (eq (field-at-pos (1- end)) 'erc-timestamp))
;; Stamps have a combined `invisible' property value.
(should (equal (get-text-property (1- end) 'invisible)
'(match-fools timestamp)))
;; The final newline is hidden by `match', not `stamps'
(with-suppressed-warnings ((obsolete erc-legacy-invisible-bounds-p))
(if erc-legacy-invisible-bounds-p
(should (eq (get-text-property end 'invisible) 'match-fools))
(should (eq (get-text-property beg 'invisible) 'match-fools))
(should-not (get-text-property end 'invisible))))
;; The message proper has the `invisible' property `match-fools',
;; and it starts after the preceding newline.
(should (eq (get-text-property (pos-bol) 'invisible) 'match-fools))
;; It ends just before the timestamp.
(let ((msg-end (next-single-property-change (pos-bol) 'invisible)))
(should (equal (get-text-property msg-end 'invisible)
'(match-fools timestamp)))
;; Stamp's `invisible' property extends throughout the stamp
;; and ends before the trailing newline.
(should (= (next-single-property-change msg-end 'invisible) end)))))
(lambda ()
(let ((end (erc--get-inserted-msg-end (point))))
;; This message has a time stamp like all the others.
(should (eq (field-at-pos (1- end)) 'erc-timestamp))
;; The entire message proper is visible.
(should-not (get-text-property (pos-bol) 'invisible))
(let ((inv-beg (next-single-property-change (pos-bol) 'invisible)))
(should (eq (get-text-property inv-beg 'invisible)
'timestamp))))))))
(ert-deftest erc-scenarios-match--stamp-right-fools-invisible ()
:tags '(:expensive-test)
(erc-scenarios-match--stamp-right-fools-invisible))
(ert-deftest erc-scenarios-match--stamp-right-fools-invisible--nooffset ()
:tags '(:expensive-test)
(with-suppressed-warnings ((obsolete erc-legacy-invisible-bounds-p))
(should-not erc-legacy-invisible-bounds-p)
(let ((erc-legacy-invisible-bounds-p t))
(erc-scenarios-match--stamp-right-fools-invisible))))
;; This asserts that when `erc-fill-wrap-mode' is enabled, ERC hides
;; the preceding message's line ending.
(ert-deftest erc-scenarios-match--stamp-right-invisible-fill-wrap ()
:tags '(:expensive-test)
(let ((erc-insert-timestamp-function #'erc-insert-timestamp-right)
(erc-fill-function #'erc-fill-wrap))
(erc-scenarios-match--invisible-stamp
(lambda ()
;; Every message has a trailing time stamp.
(should (eq (field-at-pos (1- (pos-eol))) 'erc-timestamp))
;; Stamps appear in the right margin.
(should (equal (car (get-text-property (1- (pos-eol)) 'display))
'(margin right-margin)))
;; Stamps have a combined `invisible' property value.
(should (equal (get-text-property (1- (pos-eol)) 'invisible)
'(match-fools timestamp)))
;; The message proper has the `invisible' property `match-fools',
;; which starts at the preceding newline...
(should (eq (get-text-property (1- (pos-bol)) 'invisible) 'match-fools))
;; ... and ends just before the timestamp.
(let ((msgend (next-single-property-change (1- (pos-bol)) 'invisible)))
(should (equal (get-text-property msgend 'invisible)
'(match-fools timestamp)))
;; The newline before `erc-insert-marker' is still visible.
(should-not (get-text-property (pos-eol) 'invisible))
(should (= (next-single-property-change msgend 'invisible)
(pos-eol)))))
(lambda ()
;; This message has a time stamp like all the others.
(should (eq (field-at-pos (1- (pos-eol))) 'erc-timestamp))
;; Unlike hidden messages, the preceding newline is visible.
(should-not (get-text-property (1- (pos-bol)) 'invisible))
;; The entire message proper is visible.
(let ((inv-beg (next-single-property-change (1- (pos-bol)) 'invisible)))
(should (eq (get-text-property inv-beg 'invisible) 'timestamp)))))))
(defun erc-scenarios-match--fill-wrap-stamp-dedented-p (point)
(pcase (get-text-property point 'line-prefix)
(`(space :width (- erc-fill--wrap-value (,n)))
(if (display-graphic-p) (< 100 n 200) (< 10 n 30)))
(`(space :width (- erc-fill--wrap-value ,n))
(< 10 n 30))))
(ert-deftest erc-scenarios-match--hide-fools/stamp-both/fill-wrap ()
;; Rewind the clock to known date artificially. We should probably
;; use a ticks/hz cons on 29+.
(let ((erc-stamp--current-time 704591940)
(erc-stamp--tz t)
(erc-fill-function #'erc-fill-wrap)
(bob-utterance-counter 0))
(erc-scenarios-match--invisible-stamp
(lambda ()
(ert-info ("Baseline check")
;; False date printed initially before anyone speaks.
(when (zerop bob-utterance-counter)
(save-excursion
(goto-char (point-min))
(search-forward "[Wed Apr 29 1992]")
;; First stamp in a buffer is not invisible from previous
;; newline (before stamp's own leading newline).
(should (= 4 (match-beginning 0)))
(should (get-text-property 3 'invisible))
(should-not (get-text-property 2 'invisible))
(should (erc-scenarios-match--fill-wrap-stamp-dedented-p 4))
(search-forward "[23:59]"))))
(ert-info ("Line endings in Bob's messages are invisible")
;; The message proper has the `invisible' property `match-fools'.
(should (eq (get-text-property (pos-bol) 'invisible) 'match-fools))
(pcase-let ((`(,mbeg . ,mend) (erc--get-inserted-msg-bounds)))
(should (= (char-after mend) ?\n))
(should-not (field-at-pos mend))
(should-not (field-at-pos mbeg))
(when (= bob-utterance-counter 1)
(let ((right-stamp (field-end mbeg)))
(should (eq 'erc-timestamp (field-at-pos right-stamp)))
(should (= mend (field-end right-stamp)))
(should (eq (field-at-pos (1- mend)) 'erc-timestamp))))
;; The `erc--ts' property is present in prop stack.
(should (get-text-property (pos-bol) 'erc--ts))
(should-not (next-single-property-change (1+ (pos-bol)) 'erc--ts))
;; Line ending has the `invisible' property `match-fools'.
(should (eq (get-text-property mbeg 'invisible) 'match-fools))
(should-not (get-text-property mend 'invisible))))
;; Only the message right after Alice speaks contains stamps.
(when (= 1 bob-utterance-counter)
(ert-info ("Date stamp occupying previous line is invisible")
(should (eq 'match-fools (get-text-property (point) 'invisible)))
(save-excursion
(forward-line -1)
(goto-char (pos-bol))
(should (looking-at (rx "[Mon May 4 1992]")))
(ert-info ("Stamp's NL `invisible' as fool, not timestamp")
(let ((end (match-end 0)))
(should (eq (char-after end) ?\n))
(should (eq 'timestamp
(get-text-property (1- end) 'invisible)))
(should (eq 'match-fools
(get-text-property end 'invisible)))))
(should (erc-scenarios-match--fill-wrap-stamp-dedented-p (point)))
;; Date stamp has a combined `invisible' property value
;; that starts at the previous message's trailing newline
;; and extends until the start of the message proper.
(should (equal ?\n (char-before (point))))
(should (equal ?\n (char-before (1- (point)))))
(let ((val (get-text-property (- (point) 2) 'invisible)))
(should (equal val 'timestamp))
(should (= (text-property-not-all (- (point) 2) (point-max)
'invisible val)
(pos-eol))))))
(ert-info ("Current message's RHS stamp is hidden")
;; Right stamp has `match-fools' property.
(save-excursion
(should-not (field-at-pos (point)))
(should (eq (field-at-pos (1- (pos-eol))) 'erc-timestamp)))
;; Stamp invisibility starts where message's ends.
(let ((msgend (next-single-property-change (pos-bol) 'invisible)))
;; Stamp has a combined `invisible' property value.
(should (equal (get-text-property msgend 'invisible)
'(match-fools timestamp)))
;; Combined `invisible' property spans entire timestamp.
(should (= (next-single-property-change msgend 'invisible)
(pos-eol))))))
(cl-incf bob-utterance-counter))
;; Alice.
(lambda ()
;; Set clock ahead a week or so.
(setq erc-stamp--current-time 704962800)
;; This message has no time stamp and is completely visible.
(should-not (eq (field-at-pos (1- (pos-eol))) 'erc-timestamp))
(should-not (next-single-property-change (pos-bol) 'invisible))))))
;; This asserts that speaker hiding by `erc-fill-wrap-merge' doesn't
;; take place after a series of hidden fool messages with an
;; intervening outgoing message followed immediately by a non-fool
;; message from the last non-hidden speaker (other than the user).
(ert-deftest erc-scenarios-match--hide-fools/stamp-both/fill-wrap/speak ()
(erc-scenarios-common-with-cleanup
((erc-scenarios-common-dialog "match/fools")
(erc-stamp--current-time 704591940)
(dumb-server (erc-d-run "localhost" t 'fill-wrap))
(erc-stamp--tz t)
(erc-fill-function #'erc-fill-wrap)
(port (process-contact dumb-server :service))
(erc-server-flood-penalty 0.1)
(erc-timestamp-only-if-changed-flag nil)
(erc-fools '("bob"))
(erc-text-matched-hook '(erc-hide-fools))
(erc-autojoin-channels-alist '((FooNet "#chan")))
(expect (erc-d-t-make-expecter)))
(ert-info ("Connect")
(with-current-buffer (erc :server "127.0.0.1"
:port port
:full-name "tester"
:password "changeme"
:nick "tester")
;; Module `timestamp' follows `match' in insertion hooks.
(should (memq 'erc-add-timestamp
(memq 'erc-match-message
(default-value 'erc-insert-modify-hook))))
(funcall expect 5 "This server is in debug mode")))
(ert-info ("Ensure lines featuring \"bob\" are invisible")
(with-current-buffer (erc-d-t-wait-for 10 (get-buffer "#chan"))
(should (funcall expect 10 "<alice> None better than"))
(should (funcall expect 10 "<alice> bob: Still we went"))
(should (funcall expect 10 "<bob> alice: Give me your hand"))
(erc-scenarios-common-say "hey")
(should (funcall expect 10 "<bob> You have paid the heavens"))
(should (funcall expect 10 "<alice> bob: In the sick air"))
(should (funcall expect 10 "<alice> The web of our life"))
;; Regression (see leading comment).
(should-not (equal "" (get-text-property (pos-bol) 'display)))
;; No remaining meta-data positions, no more timestamps.
(should-not (next-single-property-change (1+ (pos-bol)) 'erc--ts))
;; No remaining invisible messages.
(should-not (text-property-not-all (pos-bol) erc-insert-marker
'invisible nil))
(should (funcall expect 10 "ERC>"))
(should-not (get-text-property (pos-bol) 'invisible))
(should-not (get-text-property (point) 'invisible))))))
(defun erc-scenarios-match--stamp-both-invisible-fill-static (assert-ds)
(should (eq erc-insert-timestamp-function
#'erc-insert-timestamp-left-and-right))
;; Rewind the clock to known date artificially.
(let ((erc-stamp--current-time 704591940)
(erc-stamp--tz t)
(erc-fill-function #'erc-fill-static)
(bob-utterance-counter 0))
(erc-scenarios-match--invisible-stamp
(lambda ()
(ert-info ("Baseline check")
;; False date printed initially before anyone speaks.
(when (zerop bob-utterance-counter)
(save-excursion
(goto-char (point-min))
(search-forward "[Wed Apr 29 1992]")
(search-forward "[23:59]"))))
(ert-info ("Line endings in Bob's messages are invisible")
;; The message proper has the `invisible' property `match-fools'.
(should (eq (get-text-property (pos-bol) 'invisible) 'match-fools))
(pcase-let ((`(,mbeg . ,mend) (erc--get-inserted-msg-bounds)))
(should (= (char-after mend) ?\n))
(should-not (field-at-pos mbeg))
(should-not (field-at-pos mend))
(when (= 1 bob-utterance-counter)
;; For Bob's stamped message, check newline after stamp.
(should (eq (field-at-pos (field-end mbeg)) 'erc-timestamp))
(should (eq (field-at-pos (1- mend)) 'erc-timestamp)))
;; The `erc--ts' property is present in the message's
;; width 1 prop collection at its first char.
(should (get-text-property (pos-bol) 'erc--ts))
(should-not (next-single-property-change (1+ (pos-bol)) 'erc--ts))
;; Line ending has the `invisible' property `match-fools'.
(should (= (char-after mend) ?\n))
(with-suppressed-warnings ((obsolete erc-legacy-invisible-bounds-p))
(if erc-legacy-invisible-bounds-p
(should (eq (get-text-property mend 'invisible) 'match-fools))
(should (eq (get-text-property mbeg 'invisible) 'match-fools))
(should-not (get-text-property mend 'invisible))))))
;; Only the message right after Alice speaks contains stamps.
(when (= 1 bob-utterance-counter)
(ert-info ("Date stamp occupying previous line is invisible")
(save-excursion
(forward-line -1)
(goto-char (pos-bol))
(should (looking-at (rx "[Mon May 4 1992]")))
(should (= ?\n (char-after (- (point) 2)))) ; welcome!\n
(funcall assert-ds))) ; "assert date stamp"
(ert-info ("Folding preserved despite invisibility")
;; Message has a trailing time stamp, but it's been folded
;; over to the next line.
(should-not (eq (field-at-pos (1- (pos-eol))) 'erc-timestamp))
(save-excursion
(forward-line)
(should (eq (field-at-pos (1- (pos-eol))) 'erc-timestamp)))
;; Stamp invisibility starts where message's ends.
(let ((msgend (next-single-property-change (pos-bol) 'invisible)))
;; Stamp has a combined `invisible' property value.
(should (equal (get-text-property msgend 'invisible)
'(match-fools timestamp)))
;; Combined `invisible' property spans entire timestamp.
(should (= (next-single-property-change msgend 'invisible)
(save-excursion (forward-line) (pos-eol)))))))
(cl-incf bob-utterance-counter))
;; Alice.
(lambda ()
;; Set clock ahead a week or so.
(setq erc-stamp--current-time 704962800)
;; This message has no time stamp and is completely visible.
(should-not (eq (field-at-pos (1- (pos-eol))) 'erc-timestamp))
(should-not (next-single-property-change (pos-bol) 'invisible))))))
(ert-deftest erc-scenarios-match--stamp-both-invisible-fill-static ()
:tags '(:expensive-test)
(erc-scenarios-match--stamp-both-invisible-fill-static
(lambda ()
;; Date stamp has an `invisible' property that starts from the
;; newline delimiting the current and previous messages and
;; extends until the stamp's final newline. It is not combined
;; with the old value, `match-fools'.
(let ((delim-pos (- (point) 2)))
(should (equal 'timestamp (get-text-property delim-pos 'invisible)))
;; Stamp-only invisibility ends before its last newline.
(should (= (text-property-not-all delim-pos (point-max)
'invisible 'timestamp)
(match-end 0))))))) ; pos-eol
(ert-deftest erc-scenarios-match--stamp-both-invisible-fill-static--nooffset ()
:tags '(:expensive-test)
(with-suppressed-warnings ((obsolete erc-legacy-invisible-bounds-p))
(should-not erc-legacy-invisible-bounds-p)
(let ((erc-legacy-invisible-bounds-p t))
(erc-scenarios-match--stamp-both-invisible-fill-static
(lambda ()
;; Date stamp has an `invisible' property that covers its
;; format string exactly. It is not combined with the old
;; value, `match-fools'.
(let ((delim-prev (- (point) 2)))
(should-not (get-text-property delim-prev 'invisible))
(should (eq 'erc-timestamp (field-at-pos (point))))
(should (= (next-single-property-change delim-prev 'invisible)
(field-beginning (point))))
(should (equal 'timestamp
(get-text-property (1- (point)) 'invisible)))
;; Field stops before final newline because the date stamp
;; is (now, as of ERC 5.6) its own standalone message.
(should (= ?\n (char-after (field-end (point)))))
;; Stamp-only invisibility includes last newline.
(should (= (text-property-not-all (1- (point)) (point-max)
'invisible 'timestamp)
(1+ (field-end (point)))))))))))
;;; erc-scenarios-match.el ends here
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