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;; test-lib.el --- auxiliary stuff for Notmuch Emacs tests.
;;
;; Copyright © Carl Worth
;; Copyright © David Edmondson
;;
;; This file is part of Notmuch test suit.
;;
;; Notmuch 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.
;;
;; Notmuch 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 Notmuch. If not, see <http://www.gnu.org/licenses/>.
;;
;; Authors: Dmitry Kurochkin <dmitry.kurochkin@gmail.com>
(require 'cl) ;; This code is generally used uncompiled.
;; `read-file-name' by default uses `completing-read' function to read
;; user input. It does not respect `standard-input' variable which we
;; use in tests to provide user input. So replace it with a plain
;; `read' call.
(setq read-file-name-function (lambda (&rest _) (read)))
;; Work around a bug in emacs 23.1 and emacs 23.2 which prevents
;; noninteractive (kill-emacs) from emacsclient.
(if (and (= emacs-major-version 23) (< emacs-minor-version 3))
(defadvice kill-emacs (before disable-yes-or-no-p activate)
"Disable yes-or-no-p before executing kill-emacs"
(defun yes-or-no-p (prompt) t)))
(defun notmuch-test-wait ()
"Wait for process completion."
(while (get-buffer-process (current-buffer))
(sleep-for 0.1)))
(defun test-output (&optional filename)
"Save current buffer to file FILENAME. Default FILENAME is OUTPUT."
(write-region (point-min) (point-max) (or filename "OUTPUT")))
(defun test-visible-output (&optional filename)
"Save visible text in current buffer to file FILENAME. Default
FILENAME is OUTPUT."
(let ((text (visible-buffer-string)))
(with-temp-file (or filename "OUTPUT") (insert text))))
(defun visible-buffer-string ()
"Same as `buffer-string', but excludes invisible text and
removes any text properties."
(visible-buffer-substring (point-min) (point-max)))
(defun visible-buffer-substring (start end)
"Same as `buffer-substring-no-properties', but excludes
invisible text."
(let (str)
(while (< start end)
(let ((next-pos (next-char-property-change start end)))
(when (not (invisible-p start))
(setq str (concat str (buffer-substring-no-properties
start next-pos))))
(setq start next-pos)))
str))
(defun orphan-watchdog (pid)
"Periodically check that the process with id PID is still
running, quit if it terminated."
(if (not (process-attributes pid))
(kill-emacs)
(run-at-time "1 min" nil 'orphan-watchdog pid)))
(defun hook-counter (hook)
"Count how many times a hook is called. Increments
`hook'-counter variable value if it is bound, otherwise does
nothing."
(let ((counter (intern (concat (symbol-name hook) "-counter"))))
(if (boundp counter)
(set counter (1+ (symbol-value counter))))))
(defun add-hook-counter (hook)
"Add hook to count how many times `hook' is called."
(add-hook hook (apply-partially 'hook-counter hook)))
(add-hook-counter 'notmuch-hello-mode-hook)
(add-hook-counter 'notmuch-hello-refresh-hook)
(defadvice notmuch-search-process-filter (around pessimal activate disable)
"Feed notmuch-search-process-filter one character at a time."
(let ((string (ad-get-arg 1)))
(loop for char across string
do (progn
(ad-set-arg 1 (char-to-string char))
ad-do-it))))
(defmacro notmuch-test-run (&rest body)
"Evaluate a BODY of test expressions and output the result."
`(with-temp-buffer
(let ((buffer (current-buffer))
(result (progn ,@body)))
(switch-to-buffer buffer)
(insert (if (stringp result)
result
(prin1-to-string result)))
(test-output))))
(defun notmuch-test-report-unexpected (output expected)
"Report that the OUTPUT does not match the EXPECTED result."
(concat "Expect:\t" (prin1-to-string expected) "\n"
"Output:\t" (prin1-to-string output) "\n"))
(defun notmuch-test-expect-equal (output expected)
"Compare OUTPUT with EXPECTED. Report any discrepencies."
(if (equal output expected)
t
(cond
((and (listp output)
(listp expected))
;; Reporting the difference between two lists is done by
;; reporting differing elements of OUTPUT and EXPECTED
;; pairwise. This is expected to make analysis of failures
;; simpler.
(apply #'concat (loop for o in output
for e in expected
if (not (equal o e))
collect (notmuch-test-report-unexpected o e))))
(t
(notmuch-test-report-unexpected output expected)))))
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