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;;; erc-d-t.el --- ERT helpers for ERC test server -*- lexical-binding: t -*-
;; Copyright (C) 2020-2025 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:
(eval-and-compile
(let* ((d (file-name-directory (or (macroexp-file-name) buffer-file-name)))
(load-path (cons (directory-file-name d) load-path)))
(require 'erc-d-u)))
(require 'ert)
(defun erc-d-t-kill-related-buffers ()
"Kill all erc- or erc-d- related buffers."
(let (buflist)
(dolist (buf (buffer-list))
(with-current-buffer buf
(when (or erc-d-u--process-buffer
(derived-mode-p 'erc-mode 'erc-dcc-chat-mode))
(push buf buflist))))
(dolist (buf buflist)
(when (and (boundp 'erc-server-flood-timer)
(timerp erc-server-flood-timer))
(cancel-timer erc-server-flood-timer))
(when-let ((proc (get-buffer-process buf)))
(delete-process proc))
(when (buffer-live-p buf)
(kill-buffer buf))))
(while (when-let ((buf (pop erc-d-u--canned-buffers)))
(kill-buffer buf))))
(defun erc-d-t-silence-around (orig &rest args)
"Run ORIG function with ARGS silently.
Use this on `erc-handle-login' and `erc-server-connect'."
(let ((inhibit-message t))
(apply orig args)))
(defvar erc-d-t-cleanup-sleep-secs 0.1)
(defmacro erc-d-t-with-cleanup (bindings cleanup &rest body)
"Execute BODY and run CLEANUP form regardless of outcome.
`let*'-bind BINDINGS and make them available in BODY and CLEANUP.
After CLEANUP, destroy any values in BINDINGS that remain bound to
buffers or processes. Sleep `erc-d-t-cleanup-sleep-secs' before
returning."
(declare (indent 2))
`(let* ,bindings
(unwind-protect
(progn ,@body)
,cleanup
(when noninteractive
(let (bufs procs)
(dolist (o (list ,@(mapcar (lambda (b) (or (car-safe b) b))
bindings)))
(when (bufferp o)
(push o bufs))
(when (processp o)
(push o procs)))
(dolist (proc procs)
(delete-process proc)
(when-let ((buf (process-buffer proc)))
(push buf bufs)))
(dolist (buf bufs)
(when-let ((proc (get-buffer-process buf)))
(delete-process proc))
(when (bufferp buf)
(ignore-errors (kill-buffer buf)))))
(sleep-for erc-d-t-cleanup-sleep-secs)))))
(defvar erc-d-t--wait-message-prefix "Awaiting: ")
(defmacro erc-d-t-wait-for (max-secs msg &rest body)
"Wait for BODY to become non-nil.
Or signal error with MSG after MAX-SECS. When MAX-SECS is negative,
signal if BODY is ever non-nil before MAX-SECS elapses. On success,
return BODY's value.
Note: this assumes BODY is waiting on a peer's output. It tends to
artificially accelerate consumption of all process output, which may not
be desirable."
(declare (indent 2))
(unless (or (stringp msg) (memq (car-safe msg) '(format concat)))
(push msg body)
(setq msg (prin1-to-string body)))
(let ((inverted (make-symbol "inverted"))
(time-out (make-symbol "time-out"))
(result (make-symbol "result")))
`(ert-info ((concat erc-d-t--wait-message-prefix ,msg))
(let ((,time-out (abs ,max-secs))
(,inverted (< ,max-secs 0))
(,result ',result))
(with-timeout (,time-out (if ,inverted
(setq ,inverted nil)
(error "Failed awaiting: %s" ,msg)))
(while (not (setq ,result (progn ,@body)))
(when (and (accept-process-output nil 0.1) (not noninteractive))
(redisplay))))
(when ,inverted
(error "Failed awaiting: %s" ,msg))
,result))))
(defmacro erc-d-t-ensure-for (max-secs msg &rest body)
"Ensure BODY remains non-nil for MAX-SECS.
On failure, emit MSG."
(declare (indent 2))
(unless (or (stringp msg) (memq (car-safe msg) '(format concat)))
(push msg body)
(setq msg (prin1-to-string body)))
`(let ((erc-d-t--wait-message-prefix "Sustaining: "))
(erc-d-t-wait-for (- (abs ,max-secs)) ,msg (not (progn ,@body)))))
(defun erc-d-t-search-for (timeout text &optional from on-success)
"Wait for TEXT to appear in current buffer before TIMEOUT secs.
With marker or number FROM, only consider the portion of the buffer from
that point forward. If TEXT is a cons, interpret it as an RX regular
expression. If ON-SUCCESS is a function, call it when TEXT is found."
(save-restriction
(widen)
(let* ((rxp (consp text))
(fun (if rxp #'search-forward-regexp #'search-forward))
(pat (if rxp (rx-to-string text) text))
res)
(erc-d-t-wait-for timeout (format "string: %s" text)
(goto-char (or from (point-min)))
(setq res (funcall fun pat nil t))
(if (and on-success res)
(funcall on-success)
res)))))
(defun erc-d-t-absent-for (timeout text &optional from on-success)
"Assert TEXT doesn't appear in current buffer for TIMEOUT secs."
(erc-d-t-search-for (- (abs timeout)) text from on-success))
(defun erc-d-t-make-expecter ()
"Return function to search for new output in buffer.
Assume new text is only inserted at or after `erc-insert-marker'.
The returned function works like `erc-d-t-search-for', but it never
revisits previously covered territory, and the optional fourth argument,
ON-SUCCESS, is nonexistent. To reset, specify a FROM argument."
(let (positions)
(lambda (timeout text &optional reset-from)
(let* ((pos (cdr (assq (current-buffer) positions)))
(erc-d-t--wait-message-prefix (and (< timeout 0) "Sustaining: "))
(cb (lambda ()
(unless pos
(push (cons (current-buffer) (setq pos (make-marker)))
positions))
(marker-position
(set-marker pos (min (point) (1- (point-max))))))))
(when reset-from
(set-marker pos reset-from))
(erc-d-t-search-for timeout text pos cb)))))
(provide 'erc-d-t)
;;; erc-d-t.el ends here
|
