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;;; proced-tests.el --- Test suite for proced.el -*- lexical-binding: t -*-
;; Copyright (C) 2022-2025 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)
(require 'proced)
(require 'thingatpt)
(cl-defmacro proced--within-buffer (format filter &body body)
"Execute BODY within a proced buffer using format FORMAT and filter FILTER."
`(let ((proced-format ,format)
(proced-filter ,filter)
(proced-auto-update-flag nil)
(inhibit-message t))
(proced)
(unwind-protect
(with-current-buffer "*Proced*"
,@body)
(kill-buffer "*Proced*"))))
(defun proced--cpu-at-point ()
"Return as an integer the current CPU value at point."
(if (string-suffix-p "nan" (thing-at-point 'sexp))
(ert-skip
(format
"Found NaN value for %%CPU at point for process with PID %s"
(substring-no-properties (thing-at-point 'sexp))))
(thing-at-point 'number)))
(defun proced--assert-emacs-pid-in-buffer ()
"Fail unless the process ID of the current Emacs process exists in buffer."
(should (string-match-p
(number-to-string (emacs-pid))
(buffer-substring-no-properties (point-min) (point-max)))))
(defun proced--move-to-column (attribute)
"Move to the column under ATTRIBUTE in the current proced buffer."
(move-to-column (string-match attribute proced-header-line))
;; Sometimes the column entry does not fill the whole column.
(while (= (char-after (point)) ?\s) (forward-char)))
(defun proced--assert-process-valid-cpu-refinement (cpu)
"Fail unless the process at point could be present after a refinement using CPU."
(proced--move-to-column "%CPU")
(condition-case err
(>= (proced--cpu-at-point) cpu)
(ert-test-skipped (signal (car err) (cdr err)))
(error
(ert-fail
(list err (proced--assert-process-valid-cpu-refinement-explainer cpu))))))
(defun proced--assert-process-valid-cpu-refinement-explainer (cpu)
"Explain the result of `proced--assert-process-valid-cpu-refinement'.
CPU is as in `proced--assert-process-valid-cpu-refinement'."
`(unexpected-refinement
(header-line
,(substring-no-properties
(string-replace "%%" "%" (cadr (proced-header-line)))))
(buffer-process-line ,(thing-at-point 'line t))
(process-attributes ,(format "%s" (process-attributes (proced-pid-at-point))))
(refined-value ,cpu)
(process-value
,(save-excursion
(proced--move-to-column "%CPU")
(or (thing-at-point 'number)
(substring-no-properties (thing-at-point 'sexp)))))))
(put #'proced--assert-process-valid-cpu-refinement 'ert-explainer
#'proced--assert-process-valid-cpu-refinement-explainer)
(ert-deftest proced-format-test ()
(dolist (format '(short medium long verbose))
(proced--within-buffer
format
'user
(proced--assert-emacs-pid-in-buffer))))
(ert-deftest proced-update-test ()
(proced--within-buffer
'short
'user
(proced-update)
(proced--assert-emacs-pid-in-buffer)))
(ert-deftest proced-revert-test ()
(proced--within-buffer
'short
'user
(proced-revert)
(proced--assert-emacs-pid-in-buffer)))
(ert-deftest proced-color-test ()
(let ((proced-enable-color-flag t))
(proced--within-buffer
'short
'user
(proced--assert-emacs-pid-in-buffer))))
(ert-deftest proced-refine-test ()
;; %CPU is not implemented on macOS
(skip-when (eq system-type 'darwin))
(proced--within-buffer
'verbose
'user
;; When refining on %CPU for process A, a process is kept if and only
;; if its %CPU is greater than or equal to that of process A.
(proced--move-to-column "%CPU")
(let ((cpu (proced--cpu-at-point)))
(proced-refine)
(while (not (eobp))
(should (proced--assert-process-valid-cpu-refinement cpu))
(forward-line)))))
(ert-deftest proced-refine-with-update-test ()
(skip-when (eq system-type 'darwin))
(proced--within-buffer
'verbose
'user
(proced--move-to-column "%CPU")
(let ((cpu (proced--cpu-at-point)))
(proced-refine)
;; Don't use (proced-update t) since this will reset `proced-process-alist'
;; and it's possible the process refined on would have exited by that
;; point. In this case proced will skip the refinement and show all
;; processes again, causing the test to fail.
(proced-update)
(while (not (eobp))
(should (proced--assert-process-valid-cpu-refinement cpu))
(forward-line)))))
(ert-deftest proced-update-preserves-pid-at-point-test ()
;; FIXME: Occasionally the cursor inexplicably changes to the first line which
;; causes the test to fail when the line isn't the Emacs process.
:tags '(:unstable)
(proced--within-buffer
'medium
'user
(goto-char (point-min))
(search-forward (number-to-string (emacs-pid)))
(proced--move-to-column "PID")
(save-window-excursion
(let ((pid (proced-pid-at-point))
(new-window (split-window))
(old-window (get-buffer-window)))
(select-window new-window)
(with-current-buffer "*Proced*"
(proced-update))
(select-window old-window)
(should (= pid (proced-pid-at-point)))))))
(provide 'proced-tests)
;;; proced-tests.el ends here
|
