From: Paul Eggert <eggert@cs.ucla.edu>
Date: Tue, 9 Feb 2016 22:23:53 +0000 (-0800)
Subject: -
X-Git-Tag: emacs-26.0.90~2679
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=05595c2e59983db469e620c4f34b2eef5123391b;p=emacs.git

-
---

05595c2e59983db469e620c4f34b2eef5123391b
diff --cc test/Makefile.in
index 0034f104598,00000000000..e651c6caf0b
mode 100644,000000..100644
--- a/test/Makefile.in
+++ b/test/Makefile.in
@@@ -1,185 -1,0 +1,189 @@@
 +### @configure_input@
 +
 +# Copyright (C) 2010-2016 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 <http://www.gnu.org/licenses/>.
 +
 +### Commentary:
 +
 +## Some targets:
 +## check: re-run all tests, writing to .log files.
 +## check-maybe: run all tests whose .log file needs updating
 +## filename.log: run tests from filename.el(c) if .log file needs updating
 +## filename: re-run tests from filename.el(c), with no logging
 +
 +### Code:
 +
 +SHELL = @SHELL@
 +
 +srcdir = @srcdir@
 +VPATH = $(srcdir)
 +
 +SEPCHAR = @SEPCHAR@
 +
 +# We never change directory before running Emacs, so a relative file
 +# name is fine, and makes life easier.  If we need to change
 +# directory, we can use emacs --chdir.
 +EMACS = ../src/emacs
 +
 +EMACS_EXTRAOPT=
 +
 +# Command line flags for Emacs.
 +# Apparently MSYS bash would convert "-L :" to "-L ;" anyway,
 +# but we might as well be explicit.
 +EMACSOPT = -batch --no-site-file --no-site-lisp -L "$(SEPCHAR)$(srcdir)" $(EMACS_EXTRAOPT)
 +
 +# Prevent any settings in the user environment causing problems.
 +unexport EMACSDATA EMACSDOC EMACSPATH GREP_OPTIONS
 +
 +## To run tests under a debugger, set this to eg: "gdb --args".
 +GDB =
 +
 +# The locale to run tests under.  Tests should work if this is set to
 +# any supported locale.  Use the C locale by default, as it should be
 +# supported everywhere.
 +TEST_LOCALE = C
 +
 +# The actual Emacs command run in the targets below.
 +# Prevent any setting of EMACSLOADPATH in user environment causing problems.
 +emacs = EMACSLOADPATH= LC_ALL=$(TEST_LOCALE) EMACS_TEST_DIRECTORY=$(srcdir) \
 + $(GDB) "$(EMACS)" $(EMACSOPT)
 +
 +.PHONY: all check
 +
 +all: check
 +
 +%.elc: %.el
 +	@echo Compiling $<
 +	@$(emacs) -f batch-byte-compile $<
 +
 +## Ignore any test errors so we can continue to test other files.
 +## But compilation errors are always fatal.
 +WRITE_LOG = > $@ 2>&1 || { stat=ERROR; cat $@; }; echo $$stat: $@
 +
 +## I'd prefer to use -emacs -f ert-run-tests-batch-and-exit rather
 +## than || true, since the former makes problems more obvious.
 +## I'd also prefer to @-hide the grep part and not the
 +## ert-run-tests-batch-and-exit part.
 +##
 +## We need to use $loadfile because:
 +## i) -L :$srcdir -l basename does not work, because we have files whose
 +## basename duplicates a file in lisp/ (eg eshell.el).
 +## ii) Although -l basename will automatically load .el or .elc,
 +## -l ./basename treats basename as a literal file (it would be nice
 +## to change this; bug#17848 - if that gets done, this can be simplified).
 +##
 +## Beware: it approximates 'no-byte-compile', so watch out for false-positives!
 +SELECTOR_DEFAULT = (quote (not (tag :expensive-test)))
 +SELECTOR_EXPENSIVE = nil
- ifndef SELECTOR
++ifdef SELECTOR
++SELECTOR_ACTUAL=$(SELECTOR)
++else ifeq ($(MAKECMDGOALS),check)
++SELECTOR_ACTUAL=$(SELECTOR_DEFAULT)
++else ifeq ($(MAKECMDGOALS),check-maybe)
 +SELECTOR_ACTUAL=$(SELECTOR_DEFAULT)
 +else
- SELECTOR_ACTUAL=$(SELECTOR)
++SELECTOR_ACTUAL=$(SELECTOR_EXPENSIVE)
 +endif
 +
 +
 +%.log: %.el
 +	@if grep '^;.*no-byte-compile: t' $< > /dev/null; then \
 +	  loadfile=$<; \
 +	else \
 +	  loadfile=$<c; \
 +	  ${MAKE} $$loadfile; \
 +	fi; \
 +	echo Testing $$loadfile; \
 +	stat=OK ; \
 +	mkdir --parents $(dir $@) ; \
 +	$(emacs) -l ert -l $$loadfile \
 +	  --eval "(ert-run-tests-batch-and-exit ${SELECTOR_ACTUAL})" ${WRITE_LOG}
 +
 +ELFILES = $(shell find ${srcdir} -path "${srcdir}/manual" -prune -o \
 +		-path "*resources" -prune -o -name "*el" -print)
 +## .elc files may be in a different directory for out of source builds
 +ELCFILES = $(patsubst %.el,%.elc, \
 +		$(patsubst $(srcdir)%,.%,$(ELFILES)))
 +LOGFILES = $(patsubst %.elc,%.log,${ELCFILES})
 +LOGSAVEFILES  = $(patsubst %.elc,%.log~,${ELCFILES})
 +TESTS = $(subst ${srcdir}/,,$(LOGFILES:.log=))
 +
 +## If we have to interrupt a hanging test, preserve the log so we can
 +## see what the problem was.
 +.PRECIOUS: %.log
 +
 +.PHONY: ${TESTS}
 +
 +## The short aliases that always re-run the tests, with no logging.
 +## Define an alias both with and without the directory name for ease
 +## of use.
 +define test_template
 +$(1):
 +	@test ! -f ./$(1).log || mv ./$(1).log ./$(1).log~
 +	@${MAKE} ./$(1).log WRITE_LOG=
 +
 +$(notdir $(1)): $(1)
 +endef
 +
 +$(foreach test,${TESTS},$(eval $(call test_template,${test})))
 +
 +## Include dependencies between test files and the files they test.
 +## We do this without the file and eval directly, but then we would
 +## have to run Emacs for every make invocation, and it might not be
 +## available during clean.
 +-include make-test-deps.mk
 +## Rerun all default tests.
 +check: mostlyclean
 +	@${MAKE} check-doit SELECTOR="${SELECTOR_ACTUAL}"
 +
 +## Rerun all default and expensive tests.
 +.PHONY: check-expensive
 +check-expensive: mostlyclean
 +	@${MAKE} check-doit SELECTOR="${SELECTOR_EXPENSIVE}"
 +
 +## Only re-run default tests whose .log is older than the test.
 +.PHONY: check-maybe
 +check-maybe:
 +	@${MAKE} check-doit SELECTOR="${SELECTOR_ACTUAL}"
 +
 +## Run the tests.
 +.PHONY: check-doit
 +check-doit: ${LOGFILES}
 +	$(emacs) -l ert -f ert-summarize-tests-batch-and-exit $^
 +
 +.PHONY: mostlyclean clean bootstrap-clean distclean maintainer-clean
 +
 +mostlyclean:
 +	-@for f in ${LOGFILES}; do test ! -f $$f || mv $$f $$f~; done
 +
 +clean:
 +	-rm -f ${LOGFILES} ${LOGSAVEFILES}
 +	-rm make-test-deps.mk
 +
 +bootstrap-clean: clean
 +	-rm -f ${ELCFILES}
 +
 +distclean: clean
 +	rm -f Makefile
 +
 +maintainer-clean: distclean bootstrap-clean
 +
 +make-test-deps.mk: $(ELFILES) make-test-deps.emacs-lisp
 +	$(EMACS) --batch -l $(srcdir)/make-test-deps.emacs-lisp \
 +	--eval "(make-test-deps \"$(srcdir)\")" \
 +	2> $@
 +# Makefile ends here.
diff --cc test/lisp/filenotify-tests.el
index 5fc4ff8bf42,00000000000..a8521828c0e
mode 100644,000000..100644
--- a/test/lisp/filenotify-tests.el
+++ b/test/lisp/filenotify-tests.el
@@@ -1,855 -1,0 +1,954 @@@
 +;;; file-notify-tests.el --- Tests of file notifications  -*- lexical-binding: t; -*-
 +
 +;; Copyright (C) 2013-2016 Free Software Foundation, Inc.
 +
 +;; Author: Michael Albinus <michael.albinus@gmx.de>
 +
 +;; This program 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.
 +;;
 +;; This program 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 this program.  If not, see `http://www.gnu.org/licenses/'.
 +
 +;;; Commentary:
 +
 +;; Some of the tests require access to a remote host files.  Since
 +;; this could be problematic, a mock-up connection method "mock" is
 +;; used.  Emulating a remote connection, it simply calls "sh -i".
 +;; Tramp's file name handlers still run, so this test is sufficient
 +;; except for connection establishing.
 +
 +;; If you want to test a real Tramp connection, set
 +;; $REMOTE_TEMPORARY_FILE_DIRECTORY to a suitable value in order to
 +;; overwrite the default value.  If you want to skip tests accessing a
 +;; remote host, set this environment variable to "/dev/null" or
 +;; whatever is appropriate on your system.
 +
 +;; A whole test run can be performed calling the command `file-notify-test-all'.
 +
 +;;; Code:
 +
 +(require 'ert)
 +(require 'filenotify)
 +(require 'tramp)
 +
 +;; There is no default value on w32 systems, which could work out of the box.
 +(defconst file-notify-test-remote-temporary-file-directory
 +  (cond
 +   ((getenv "REMOTE_TEMPORARY_FILE_DIRECTORY"))
 +   ((eq system-type 'windows-nt) null-device)
 +   (t (add-to-list
 +       'tramp-methods
 +       '("mock"
 +	 (tramp-login-program        "sh")
 +	 (tramp-login-args           (("-i")))
 +	 (tramp-remote-shell         "/bin/sh")
 +	 (tramp-remote-shell-args    ("-c"))
 +	 (tramp-connection-timeout   10)))
 +      (format "/mock::%s" temporary-file-directory)))
 +  "Temporary directory for Tramp tests.")
 +
 +(defvar file-notify--test-tmpfile nil)
 +(defvar file-notify--test-tmpfile1 nil)
 +(defvar file-notify--test-desc nil)
 +(defvar file-notify--test-results nil)
 +(defvar file-notify--test-event nil)
 +(defvar file-notify--test-events nil)
 +
++(defconst file-notify--test-read-event-timeout 0.02
++  "Timeout for `read-event' calls.
++It is different for local and remote file notification libraries.")
++
 +(defun file-notify--test-timeout ()
 +  "Timeout to wait for arriving events, in seconds."
 +  (cond
 +   ((file-remote-p temporary-file-directory) 6)
 +   ((string-equal (file-notify--test-library) "w32notify") 10)
 +   ((eq system-type 'cygwin) 10)
 +   (t 3)))
 +
 +(defun file-notify--test-cleanup ()
 +  "Cleanup after a test."
 +  (file-notify-rm-watch file-notify--test-desc)
 +
-   (when (and file-notify--test-tmpfile
-              (file-exists-p file-notify--test-tmpfile))
++  (ignore-errors
++    (delete-file (file-newest-backup file-notify--test-tmpfile)))
++  (ignore-errors
 +    (if (file-directory-p file-notify--test-tmpfile)
 +        (delete-directory file-notify--test-tmpfile 'recursive)
 +      (delete-file file-notify--test-tmpfile)))
-   (when (and file-notify--test-tmpfile1
-              (file-exists-p file-notify--test-tmpfile1))
++  (ignore-errors
 +    (if (file-directory-p file-notify--test-tmpfile1)
 +        (delete-directory file-notify--test-tmpfile1 'recursive)
 +      (delete-file file-notify--test-tmpfile1)))
-   (when (file-remote-p temporary-file-directory)
-     (tramp-cleanup-connection
-      (tramp-dissect-file-name temporary-file-directory) nil 'keep-password))
++  (ignore-errors
++    (when (file-remote-p temporary-file-directory)
++      (tramp-cleanup-connection
++       (tramp-dissect-file-name temporary-file-directory) nil 'keep-password)))
 +
 +  (setq file-notify--test-tmpfile nil
 +        file-notify--test-tmpfile1 nil
 +        file-notify--test-desc nil
 +        file-notify--test-results nil
 +        file-notify--test-events nil)
 +  (when file-notify--test-event
 +    (error "file-notify--test-event should not be set but bound dynamically")))
 +
 +(setq password-cache-expiry nil
 +      tramp-verbose 0
 +      tramp-message-show-message nil)
 +
 +;; This shall happen on hydra only.
 +(when (getenv "NIX_STORE")
 +  (add-to-list 'tramp-remote-path 'tramp-own-remote-path))
 +
 +;; We do not want to try and fail `file-notify-add-watch'.
 +(defun file-notify--test-local-enabled ()
 +  "Whether local file notification is enabled.
 +This is needed for local `temporary-file-directory' only, in the
 +remote case we return always t."
 +  (or file-notify--library
 +      (file-remote-p temporary-file-directory)))
 +
 +(defvar file-notify--test-remote-enabled-checked nil
 +  "Cached result of `file-notify--test-remote-enabled'.
 +If the function did run, the value is a cons cell, the `cdr'
 +being the result.")
 +
 +(defun file-notify--test-remote-enabled ()
 +  "Whether remote file notification is enabled."
 +  (unless (consp file-notify--test-remote-enabled-checked)
 +    (let (desc)
 +      (ignore-errors
 +        (and
 +         (file-remote-p file-notify-test-remote-temporary-file-directory)
 +         (file-directory-p file-notify-test-remote-temporary-file-directory)
 +         (file-writable-p file-notify-test-remote-temporary-file-directory)
 +         (setq desc
 +               (file-notify-add-watch
 +                file-notify-test-remote-temporary-file-directory
 +                '(change) 'ignore))))
 +      (setq file-notify--test-remote-enabled-checked (cons t desc))
 +      (when desc (file-notify-rm-watch desc))))
 +  ;; Return result.
 +  (cdr file-notify--test-remote-enabled-checked))
 +
 +(defun file-notify--test-library ()
 +  "The used library for the test, as a string.
 +In the remote case, it is the process name which runs on the
 +remote host, or nil."
 +  (if (null (file-remote-p temporary-file-directory))
 +      (symbol-name file-notify--library)
 +    (and (consp file-notify--test-remote-enabled-checked)
 +	 (processp (cdr file-notify--test-remote-enabled-checked))
 +	 (replace-regexp-in-string
 +	  "<[[:digit:]]+>\\'" ""
 +	  (process-name (cdr file-notify--test-remote-enabled-checked))))))
 +
 +(defmacro file-notify--deftest-remote (test docstring)
 +  "Define ert `TEST-remote' for remote files."
 +  (declare (indent 1))
 +  `(ert-deftest ,(intern (concat (symbol-name test) "-remote")) ()
 +     ,docstring
 +     :tags '(:expensive-test)
 +     (let* ((temporary-file-directory
 +	     file-notify-test-remote-temporary-file-directory)
++            (file-notify--test-read-event-timeout 0.1)
 +	    (ert-test (ert-get-test ',test)))
 +       (skip-unless (file-notify--test-remote-enabled))
 +       (tramp-cleanup-connection
 +	(tramp-dissect-file-name temporary-file-directory) nil 'keep-password)
 +       (funcall (ert-test-body ert-test)))))
 +
 +(ert-deftest file-notify-test00-availability ()
 +  "Test availability of `file-notify'."
 +  (skip-unless (file-notify--test-local-enabled))
 +  ;; Report the native library which has been used.
 +  (message "Library: `%s'" (file-notify--test-library))
 +  (should
 +   (setq file-notify--test-desc
 +         (file-notify-add-watch temporary-file-directory '(change) 'ignore)))
 +
 +  ;; Cleanup.
 +  (file-notify--test-cleanup))
 +
 +(file-notify--deftest-remote file-notify-test00-availability
 +  "Test availability of `file-notify' for remote files.")
 +
 +(ert-deftest file-notify-test01-add-watch ()
 +  "Check `file-notify-add-watch'."
 +  (skip-unless (file-notify--test-local-enabled))
 +
 +  (setq file-notify--test-tmpfile  (file-notify--test-make-temp-name)
 +        file-notify--test-tmpfile1
 +        (format "%s/%s" file-notify--test-tmpfile (md5 (current-time-string))))
 +
 +  ;; Check, that different valid parameters are accepted.
 +  (should
 +   (setq file-notify--test-desc
 +         (file-notify-add-watch temporary-file-directory '(change) 'ignore)))
 +  (file-notify-rm-watch file-notify--test-desc)
 +  (should
 +   (setq file-notify--test-desc
 +         (file-notify-add-watch
 +          temporary-file-directory '(attribute-change) 'ignore)))
 +  (file-notify-rm-watch file-notify--test-desc)
 +  (should
 +   (setq file-notify--test-desc
 +         (file-notify-add-watch
 +          temporary-file-directory '(change attribute-change) 'ignore)))
 +  (file-notify-rm-watch file-notify--test-desc)
 +  (write-region "any text" nil file-notify--test-tmpfile nil 'no-message)
 +  (should
 +   (setq file-notify--test-desc
 +         (file-notify-add-watch
 +          file-notify--test-tmpfile '(change attribute-change) 'ignore)))
 +  (file-notify-rm-watch file-notify--test-desc)
 +  (delete-file file-notify--test-tmpfile)
 +
 +  ;; Check error handling.
 +  (should-error (file-notify-add-watch 1 2 3 4)
 +                :type 'wrong-number-of-arguments)
 +  (should
 +   (equal (should-error
 +           (file-notify-add-watch 1 2 3))
 +          '(wrong-type-argument 1)))
 +  (should
 +   (equal (should-error
 +           (file-notify-add-watch temporary-file-directory 2 3))
 +          '(wrong-type-argument 2)))
 +  (should
 +   (equal (should-error
 +           (file-notify-add-watch temporary-file-directory '(change) 3))
 +          '(wrong-type-argument 3)))
 +  ;; The upper directory of a file must exist.
 +  (should
 +   (equal (should-error
 +           (file-notify-add-watch
 +            file-notify--test-tmpfile1 '(change attribute-change) 'ignore))
 +          `(file-notify-error
 +            "Directory does not exist" ,file-notify--test-tmpfile)))
 +
 +  ;; Cleanup.
 +  (file-notify--test-cleanup))
 +
 +(file-notify--deftest-remote file-notify-test01-add-watch
 +  "Check `file-notify-add-watch' for remote files.")
 +
 +(defun file-notify--test-event-test ()
 +  "Ert test function to be called by `file-notify--test-event-handler'.
 +We cannot pass arguments, so we assume that `file-notify--test-event'
 +is bound somewhere."
 +  ;; Check the descriptor.
 +  (should (equal (car file-notify--test-event) file-notify--test-desc))
 +  ;; Check the file name.
 +  (should
 +   (or (string-equal (file-notify--event-file-name file-notify--test-event)
 +		     file-notify--test-tmpfile)
 +       (string-equal (file-notify--event-file-name file-notify--test-event)
 +		     file-notify--test-tmpfile1)
 +       (string-equal (file-notify--event-file-name file-notify--test-event)
 +		     temporary-file-directory)))
 +  ;; Check the second file name if exists.
 +  (when (eq (nth 1 file-notify--test-event) 'renamed)
 +    (should
 +     (or (string-equal (file-notify--event-file1-name file-notify--test-event)
 +		       file-notify--test-tmpfile1)
 +	 (string-equal (file-notify--event-file1-name file-notify--test-event)
 +		       temporary-file-directory)))))
 +
 +(defun file-notify--test-event-handler (event)
 +  "Run a test over FILE-NOTIFY--TEST-EVENT.
 +For later analysis, append the test result to `file-notify--test-results'
 +and the event to `file-notify--test-events'."
 +  (let* ((file-notify--test-event event)
 +         (result
 +          (ert-run-test (make-ert-test :body 'file-notify--test-event-test))))
 +    ;; Do not add lock files, this would confuse the checks.
 +    (unless (string-match
 +	     (regexp-quote ".#")
 +	     (file-notify--event-file-name file-notify--test-event))
 +      ;;(message "file-notify--test-event-handler %S" file-notify--test-event)
 +      (setq file-notify--test-events
 +	    (append file-notify--test-events `(,file-notify--test-event))
 +	    file-notify--test-results
 +	    (append file-notify--test-results `(,result))))))
 +
 +(defun file-notify--test-make-temp-name ()
 +  "Create a temporary file name for test."
 +  (expand-file-name
 +   (make-temp-name "file-notify-test") temporary-file-directory))
 +
 +(defmacro file-notify--wait-for-events (timeout until)
 +  "Wait for and return file notification events until form UNTIL is true.
 +TIMEOUT is the maximum time to wait for, in seconds."
 +  `(with-timeout (,timeout (ignore))
 +     (while (null ,until)
-        (read-event nil nil 0.1))))
++       (read-event nil nil file-notify--test-read-event-timeout))))
++
++(defun file-notify--test-with-events-check (events)
++  "Check whether received events match one of the EVENTS alternatives."
++  (let (result)
++    (dolist (elt events result)
++      (setq result
++            (or result
++                (equal elt (mapcar #'cadr file-notify--test-events)))))))
++
++(defun file-notify--test-with-events-explainer (events)
++  "Explain why `file-notify--test-with-events-check' fails."
++  (if (null (cdr events))
++      (format "Received events `%s' do not match expected events `%s'"
++              (mapcar #'cadr file-notify--test-events) (car events))
++    (format
++     "Received events `%s' do not match any sequence of expected events `%s'"
++     (mapcar #'cadr file-notify--test-events) events)))
++
++(put 'file-notify--test-with-events-check 'ert-explainer
++     'file-notify--test-with-events-explainer)
 +
 +(defmacro file-notify--test-with-events (events &rest body)
 +  "Run BODY collecting events and then compare with EVENTS.
 +EVENTS is either a simple list of events, or a list of lists of
 +events, which represent different possible results.  Don't wait
 +longer than timeout seconds for the events to be delivered."
 +  (declare (indent 1))
 +  (let ((outer (make-symbol "outer")))
 +    `(let* ((,outer file-notify--test-events)
 +            (events (if (consp (car ,events)) ,events (list ,events)))
 +            (max-length (apply 'max (mapcar 'length events)))
-             create-lockfiles result)
++            create-lockfiles)
 +       ;; Flush pending events.
 +       (file-notify--wait-for-events
 +        (file-notify--test-timeout)
 +        (input-pending-p))
 +       (let (file-notify--test-events)
 +         ,@body
 +         (file-notify--wait-for-events
 +          ;; More events need more time.  Use some fudge factor.
 +          (* (ceiling max-length 100) (file-notify--test-timeout))
 +          (= max-length (length file-notify--test-events)))
 +         ;; One of the possible results shall match.
-          (should
-           (dolist (elt events result)
-             (setq result
-                   (or result
-                       (equal elt (mapcar #'cadr file-notify--test-events))))))
++         (should (file-notify--test-with-events-check events))
 +         (setq ,outer (append ,outer file-notify--test-events)))
 +       (setq file-notify--test-events ,outer))))
 +
 +(ert-deftest file-notify-test02-events ()
 +  "Check file creation/change/removal notifications."
 +  (skip-unless (file-notify--test-local-enabled))
 +
 +  (unwind-protect
 +      (progn
 +        ;; Check file creation, change and deletion.  It doesn't work
 +        ;; for cygwin and kqueue, because we don't use an implicit
 +        ;; directory monitor (kqueue), or the timings are too bad (cygwin).
 +        (unless (or (eq system-type 'cygwin)
 +		    (string-equal (file-notify--test-library) "kqueue"))
 +          (setq file-notify--test-tmpfile (file-notify--test-make-temp-name))
 +          (should
 +           (setq file-notify--test-desc
 +                 (file-notify-add-watch
 +                  file-notify--test-tmpfile
 +                  '(change) 'file-notify--test-event-handler)))
 +          (file-notify--test-with-events
 +              (cond
 +               ;; cygwin recognizes only `deleted' and `stopped' events.
 +               ((eq system-type 'cygwin)
 +                '(deleted stopped))
 +               (t '(created changed deleted stopped)))
 +            (write-region
 +             "another text" nil file-notify--test-tmpfile nil 'no-message)
-             (read-event nil nil 0.1)
++            (read-event nil nil file-notify--test-read-event-timeout)
 +            (delete-file file-notify--test-tmpfile))
 +          ;; `file-notify-rm-watch' fires the `stopped' event.  Suppress it.
 +          (let (file-notify--test-events)
 +            (file-notify-rm-watch file-notify--test-desc)))
 +
 +        ;; Check file change and deletion.
 +	(setq file-notify--test-tmpfile (file-notify--test-make-temp-name))
 +        (write-region "any text" nil file-notify--test-tmpfile nil 'no-message)
 +	(should
 +	 (setq file-notify--test-desc
 +	       (file-notify-add-watch
 +		file-notify--test-tmpfile
 +		'(change) 'file-notify--test-event-handler)))
 +        (file-notify--test-with-events
 +	    (cond
 +	     ;; cygwin recognizes only `deleted' and `stopped' events.
 +	     ((eq system-type 'cygwin)
 +	      '(deleted stopped))
 +             ;; inotify and kqueue raise just one `changed' event.
 +             ((or (string-equal "inotify" (file-notify--test-library))
 +                  (string-equal "kqueue" (file-notify--test-library)))
 +	      '(changed deleted stopped))
 +             ;; gfilenotify raises one or two `changed' events
 +             ;; randomly, no chance to test.  So we accept both cases.
 +             ((string-equal "gfilenotify" (file-notify--test-library))
 +              '((changed deleted stopped)
 +                (changed changed deleted stopped)))
 +	     (t '(changed changed deleted stopped)))
-           (read-event nil nil 0.1)
++          (read-event nil nil file-notify--test-read-event-timeout)
 +          (write-region
 +           "another text" nil file-notify--test-tmpfile nil 'no-message)
-           (read-event nil nil 0.1)
++          (read-event nil nil file-notify--test-read-event-timeout)
 +          (delete-file file-notify--test-tmpfile))
 +	;; `file-notify-rm-watch' fires the `stopped' event.  Suppress it.
 +	(let (file-notify--test-events)
 +	  (file-notify-rm-watch file-notify--test-desc))
 +
 +        ;; Check file creation, change and deletion when watching a
 +        ;; directory.  There must be a `stopped' event when deleting
 +        ;; the directory.
 +	(let ((temporary-file-directory
 +	       (make-temp-file "file-notify-test-parent" t)))
 +	  (should
 +	   (setq file-notify--test-tmpfile (file-notify--test-make-temp-name)
 +		 file-notify--test-desc
 +		 (file-notify-add-watch
 +		  temporary-file-directory
 +		  '(change) 'file-notify--test-event-handler)))
 +	  (file-notify--test-with-events
 +	      (cond
 +	       ;; w32notify does raise a `stopped' event when a
 +	       ;; watched directory is deleted.
 +	       ((string-equal (file-notify--test-library) "w32notify")
 +		'(created changed deleted))
 +	       ;; cygwin recognizes only `deleted' and `stopped' events.
 +	       ((eq system-type 'cygwin)
 +		'(deleted stopped))
 +	       ;; There are two `deleted' events, for the file and for
 +	       ;; the directory.  Except for kqueue.
 +	       ((string-equal (file-notify--test-library) "kqueue")
 +		'(created changed deleted stopped))
 +	       (t '(created changed deleted deleted stopped)))
- 	    (read-event nil nil 0.1)
++	    (read-event nil nil file-notify--test-read-event-timeout)
 +	    (write-region
 +	     "any text" nil file-notify--test-tmpfile nil 'no-message)
- 	    (read-event nil nil 0.1)
++	    (read-event nil nil file-notify--test-read-event-timeout)
 +	    (delete-directory temporary-file-directory 'recursive))
 +	  ;; `file-notify-rm-watch' fires the `stopped' event.  Suppress it.
 +	  (let (file-notify--test-events)
 +	    (file-notify-rm-watch file-notify--test-desc)))
 +
 +        ;; Check copy of files inside a directory.
 +	(let ((temporary-file-directory
 +	       (make-temp-file "file-notify-test-parent" t)))
 +	  (should
 +	   (setq file-notify--test-tmpfile (file-notify--test-make-temp-name)
 +		 file-notify--test-tmpfile1 (file-notify--test-make-temp-name)
 +		 file-notify--test-desc
 +		 (file-notify-add-watch
 +		  temporary-file-directory
 +		  '(change) 'file-notify--test-event-handler)))
 +	  (file-notify--test-with-events
 +	      (cond
 +	       ;; w32notify does not distinguish between `changed' and
 +	       ;; `attribute-changed'.
 +	       ((string-equal (file-notify--test-library) "w32notify")
 +		'(created changed created changed changed changed changed
 +		  deleted deleted))
 +	       ;; cygwin recognizes only `deleted' and `stopped' events.
 +	       ((eq system-type 'cygwin)
 +		'(deleted stopped))
 +	       ;; There are three `deleted' events, for two files and
 +	       ;; for the directory.  Except for kqueue.
 +	       ((string-equal (file-notify--test-library) "kqueue")
 +		'(created changed created changed deleted stopped))
 +	       (t '(created changed created changed
 +		    deleted deleted deleted stopped)))
- 	    (read-event nil nil 0.1)
++	    (read-event nil nil file-notify--test-read-event-timeout)
 +	    (write-region
 +	     "any text" nil file-notify--test-tmpfile nil 'no-message)
- 	    (read-event nil nil 0.1)
++	    (read-event nil nil file-notify--test-read-event-timeout)
 +	    (copy-file file-notify--test-tmpfile file-notify--test-tmpfile1)
 +	    ;; The next two events shall not be visible.
- 	    (read-event nil nil 0.1)
++	    (read-event nil nil file-notify--test-read-event-timeout)
 +	    (set-file-modes file-notify--test-tmpfile 000)
- 	    (read-event nil nil 0.1)
++	    (read-event nil nil file-notify--test-read-event-timeout)
 +	    (set-file-times file-notify--test-tmpfile '(0 0))
- 	    (read-event nil nil 0.1)
++	    (read-event nil nil file-notify--test-read-event-timeout)
 +	    (delete-directory temporary-file-directory 'recursive))
 +	  ;; `file-notify-rm-watch' fires the `stopped' event.  Suppress it.
 +	  (let (file-notify--test-events)
 +	    (file-notify-rm-watch file-notify--test-desc)))
 +
 +        ;; Check rename of files inside a directory.
 +	(let ((temporary-file-directory
 +	       (make-temp-file "file-notify-test-parent" t)))
 +	  (should
 +	   (setq file-notify--test-tmpfile (file-notify--test-make-temp-name)
 +		 file-notify--test-tmpfile1 (file-notify--test-make-temp-name)
 +		 file-notify--test-desc
 +		 (file-notify-add-watch
 +		  temporary-file-directory
 +		  '(change) 'file-notify--test-event-handler)))
 +	  (file-notify--test-with-events
 +	      (cond
 +	       ;; w32notify does not distinguish between `changed' and
 +	       ;; `attribute-changed'.
 +	       ((string-equal (file-notify--test-library) "w32notify")
 +		'(created changed renamed deleted))
 +	       ;; cygwin recognizes only `deleted' and `stopped' events.
 +	       ((eq system-type 'cygwin)
 +		'(deleted stopped))
 +	       ;; There are two `deleted' events, for the file and for
 +	       ;; the directory.  Except for kqueue.
 +	       ((string-equal (file-notify--test-library) "kqueue")
 +		'(created changed renamed deleted stopped))
 +	       (t '(created changed renamed deleted deleted stopped)))
- 	    (read-event nil nil 0.1)
++	    (read-event nil nil file-notify--test-read-event-timeout)
 +	    (write-region
 +	     "any text" nil file-notify--test-tmpfile nil 'no-message)
- 	    (read-event nil nil 0.1)
++	    (read-event nil nil file-notify--test-read-event-timeout)
 +	    (rename-file file-notify--test-tmpfile file-notify--test-tmpfile1)
 +	    ;; After the rename, we won't get events anymore.
- 	    (read-event nil nil 0.1)
++	    (read-event nil nil file-notify--test-read-event-timeout)
 +	    (delete-directory temporary-file-directory 'recursive))
 +	  ;; `file-notify-rm-watch' fires the `stopped' event.  Suppress it.
 +	  (let (file-notify--test-events)
 +	    (file-notify-rm-watch file-notify--test-desc)))
 +
 +        ;; Check attribute change.  Does not work for cygwin.
 +	(unless (eq system-type 'cygwin)
 +	  (setq file-notify--test-tmpfile (file-notify--test-make-temp-name))
 +	  (write-region
 +	   "any text" nil file-notify--test-tmpfile nil 'no-message)
 +	  (should
 +	   (setq file-notify--test-desc
 +		 (file-notify-add-watch
 +		  file-notify--test-tmpfile
 +		  '(attribute-change) 'file-notify--test-event-handler)))
 +	  (file-notify--test-with-events
 +	      (cond
 +	       ;; w32notify does not distinguish between `changed' and
 +	       ;; `attribute-changed'.
 +	       ((string-equal (file-notify--test-library) "w32notify")
 +		'(changed changed changed changed))
 +	       ;; For kqueue and in the remote case, `write-region'
 +	       ;; raises also an `attribute-changed' event.
 +	       ((or (string-equal (file-notify--test-library) "kqueue")
 +		    (file-remote-p temporary-file-directory))
 +		'(attribute-changed attribute-changed attribute-changed))
 +	       (t '(attribute-changed attribute-changed)))
- 	    (read-event nil nil 0.1)
++	    (read-event nil nil file-notify--test-read-event-timeout)
 +	    (write-region
 +	     "any text" nil file-notify--test-tmpfile nil 'no-message)
- 	    (read-event nil nil 0.1)
++	    (read-event nil nil file-notify--test-read-event-timeout)
 +	    (set-file-modes file-notify--test-tmpfile 000)
- 	    (read-event nil nil 0.1)
++	    (read-event nil nil file-notify--test-read-event-timeout)
 +	    (set-file-times file-notify--test-tmpfile '(0 0))
- 	    (read-event nil nil 0.1)
++	    (read-event nil nil file-notify--test-read-event-timeout)
 +	    (delete-file file-notify--test-tmpfile))
 +	  ;; `file-notify-rm-watch' fires the `stopped' event.  Suppress it.
 +	  (let (file-notify--test-events)
 +	    (file-notify-rm-watch file-notify--test-desc)))
 +
 +        ;; Check the global sequence again just to make sure that
 +        ;; `file-notify--test-events' has been set correctly.
 +        (should file-notify--test-results)
 +        (dolist (result file-notify--test-results)
 +          (when (ert-test-failed-p result)
 +            (ert-fail
 +             (cadr (ert-test-result-with-condition-condition result))))))
 +
 +    ;; Cleanup.
 +    (file-notify--test-cleanup)))
 +
 +(file-notify--deftest-remote file-notify-test02-events
 +  "Check file creation/change/removal notifications for remote files.")
 +
 +(require 'autorevert)
 +(setq auto-revert-notify-exclude-dir-regexp "nothing-to-be-excluded"
 +      auto-revert-remote-files t
 +      auto-revert-stop-on-user-input nil)
 +
 +(ert-deftest file-notify-test03-autorevert ()
 +  "Check autorevert via file notification."
 +  (skip-unless (file-notify--test-local-enabled))
 +  ;; `auto-revert-buffers' runs every 5".  And we must wait, until the
 +  ;; file has been reverted.
 +  (let ((timeout (if (file-remote-p temporary-file-directory) 60 10))
 +        buf)
 +    (unwind-protect
 +	(progn
 +	  (setq file-notify--test-tmpfile (file-notify--test-make-temp-name))
 +
 +	  (write-region
 +	   "any text" nil file-notify--test-tmpfile nil 'no-message)
 +	  (setq buf (find-file-noselect file-notify--test-tmpfile))
 +	  (with-current-buffer buf
 +	    (should (string-equal (buffer-string) "any text"))
 +            ;; `buffer-stale--default-function' checks for
 +            ;; `verify-visited-file-modtime'.  We must ensure that it
 +            ;; returns nil.
 +            (sleep-for 1)
 +	    (auto-revert-mode 1)
 +
 +	    ;; `auto-revert-buffers' runs every 5".
 +	    (with-timeout (timeout (ignore))
 +	      (while (null auto-revert-notify-watch-descriptor)
 +		(sleep-for 1)))
 +
 +	    ;; Check, that file notification has been used.
 +	    (should auto-revert-mode)
 +	    (should auto-revert-use-notify)
 +	    (should auto-revert-notify-watch-descriptor)
 +
 +	    ;; Modify file.  We wait for a second, in order to have
 +	    ;; another timestamp.
 +            (with-current-buffer (get-buffer-create "*Messages*")
 +              (narrow-to-region (point-max) (point-max)))
 +	    (sleep-for 1)
 +            (write-region
 +             "another text" nil file-notify--test-tmpfile nil 'no-message)
 +
 +	    ;; Check, that the buffer has been reverted.
 +	    (with-current-buffer (get-buffer-create "*Messages*")
 +	      (file-notify--wait-for-events
 +	       timeout
 +	       (string-match
 +                (format-message "Reverting buffer `%s'." (buffer-name buf))
 +                (buffer-string))))
 +	    (should (string-match "another text" (buffer-string)))
 +
 +            ;; Stop file notification.  Autorevert shall still work via polling.
 +	    ;; It doesn't work for w32notify.
 +	    (unless (string-equal (file-notify--test-library) "w32notify")
 +	      (file-notify-rm-watch auto-revert-notify-watch-descriptor)
 +	      (file-notify--wait-for-events
 +	       timeout (null auto-revert-use-notify))
 +	      (should-not auto-revert-use-notify)
 +	      (should-not auto-revert-notify-watch-descriptor)
 +
 +	      ;; Modify file.  We wait for two seconds, in order to
 +	      ;; have another timestamp.  One second seems to be too
 +	      ;; short.
 +	      (with-current-buffer (get-buffer-create "*Messages*")
 +		(narrow-to-region (point-max) (point-max)))
 +	      (sleep-for 2)
 +	      (write-region
 +	       "foo bla" nil file-notify--test-tmpfile nil 'no-message)
 +
 +	      ;; Check, that the buffer has been reverted.
 +	      (with-current-buffer (get-buffer-create "*Messages*")
 +		(file-notify--wait-for-events
 +		 timeout
 +		 (string-match
 +		  (format-message "Reverting buffer `%s'." (buffer-name buf))
 +		  (buffer-string))))
 +	      (should (string-match "foo bla" (buffer-string))))))
 +
 +      ;; Cleanup.
 +      (with-current-buffer "*Messages*" (widen))
 +      (ignore-errors (kill-buffer buf))
 +      (file-notify--test-cleanup))))
 +
 +(file-notify--deftest-remote file-notify-test03-autorevert
 +  "Check autorevert via file notification for remote files.")
 +
 +(ert-deftest file-notify-test04-file-validity ()
 +  "Check `file-notify-valid-p' for files."
 +  (skip-unless (file-notify--test-local-enabled))
 +
 +  (unwind-protect
 +      (progn
 +        (setq file-notify--test-tmpfile (file-notify--test-make-temp-name))
 +	(write-region "any text" nil file-notify--test-tmpfile nil 'no-message)
 +	(should
 +	 (setq file-notify--test-desc
 +	       (file-notify-add-watch
 +		file-notify--test-tmpfile
 +		'(change) #'file-notify--test-event-handler)))
 +        (should (file-notify-valid-p file-notify--test-desc))
 +	;; After calling `file-notify-rm-watch', the descriptor is not
 +	;; valid anymore.
 +        (file-notify-rm-watch file-notify--test-desc)
 +        (should-not (file-notify-valid-p file-notify--test-desc))
 +	(delete-file file-notify--test-tmpfile))
 +
 +    ;; Cleanup.
 +    (file-notify--test-cleanup))
 +
 +  (unwind-protect
 +      (progn
 +        (setq file-notify--test-tmpfile (file-notify--test-make-temp-name))
 +	(write-region "any text" nil file-notify--test-tmpfile nil 'no-message)
 +	(should
 +	 (setq file-notify--test-desc
 +	       (file-notify-add-watch
 +		file-notify--test-tmpfile
 +		'(change) #'file-notify--test-event-handler)))
 +        (file-notify--test-with-events
 +            (cond
 +             ;; cygwin recognizes only `deleted' and `stopped' events.
 +	     ((eq system-type 'cygwin)
 +	      '(deleted stopped))
 +             ;; inotify and kqueue raise just one `changed' event.
 +             ((or (string-equal "inotify" (file-notify--test-library))
 +                  (string-equal "kqueue" (file-notify--test-library)))
 +	      '(changed deleted stopped))
 +             ;; gfilenotify raises one or two `changed' events
 +             ;; randomly, no chance to test.  So we accept both cases.
 +             ((string-equal "gfilenotify" (file-notify--test-library))
 +              '((changed deleted stopped)
 +                (changed changed deleted stopped)))
 +	     (t '(changed changed deleted stopped)))
 +          (should (file-notify-valid-p file-notify--test-desc))
- 	  (read-event nil nil 0.1)
++	  (read-event nil nil file-notify--test-read-event-timeout)
 +          (write-region
 +           "another text" nil file-notify--test-tmpfile nil 'no-message)
- 	  (read-event nil nil 0.1)
++	  (read-event nil nil file-notify--test-read-event-timeout)
 +	  (delete-file file-notify--test-tmpfile))
 +	;; After deleting the file, the descriptor is not valid anymore.
 +        (should-not (file-notify-valid-p file-notify--test-desc))
 +        (file-notify-rm-watch file-notify--test-desc))
 +
 +    ;; Cleanup.
 +    (file-notify--test-cleanup))
 +
 +  (unwind-protect
 +      ;; w32notify does not send a `stopped' event when deleting a
 +      ;; directory.  The test does not work, therefore.
 +      (unless (string-equal (file-notify--test-library) "w32notify")
 +	(let ((temporary-file-directory
 +	       (make-temp-file "file-notify-test-parent" t)))
 +	  (should
 +	   (setq file-notify--test-tmpfile (file-notify--test-make-temp-name)
 +		 file-notify--test-desc
 +		 (file-notify-add-watch
 +		  temporary-file-directory
 +		  '(change) #'file-notify--test-event-handler)))
 +	  (file-notify--test-with-events
 +	      (cond
 +	       ;; cygwin recognizes only `deleted' and `stopped' events.
 +	       ((eq system-type 'cygwin)
 +		'(deleted stopped))
 +	       ;; There are two `deleted' events, for the file and for
 +	       ;; the directory.  Except for kqueue.
 +	       ((string-equal (file-notify--test-library) "kqueue")
 +		'(created changed deleted stopped))
 +	       (t '(created changed deleted deleted stopped)))
 +	    (should (file-notify-valid-p file-notify--test-desc))
- 	    (read-event nil nil 0.1)
++	    (read-event nil nil file-notify--test-read-event-timeout)
 +	    (write-region
 +	     "any text" nil file-notify--test-tmpfile nil 'no-message)
- 	    (read-event nil nil 0.1)
++	    (read-event nil nil file-notify--test-read-event-timeout)
 +	    (delete-directory temporary-file-directory t))
 +	  ;; After deleting the parent directory, the descriptor must
 +	  ;; not be valid anymore.
 +	  (should-not (file-notify-valid-p file-notify--test-desc))))
 +
 +    ;; Cleanup.
 +    (file-notify--test-cleanup)))
 +
 +(file-notify--deftest-remote file-notify-test04-file-validity
 +  "Check `file-notify-valid-p' via file notification for remote files.")
 +
 +(ert-deftest file-notify-test05-dir-validity ()
 +  "Check `file-notify-valid-p' for directories."
 +  (skip-unless (file-notify--test-local-enabled))
 +
 +  (unwind-protect
 +      (progn
 +        (setq file-notify--test-tmpfile
 +	      (file-name-as-directory (file-notify--test-make-temp-name)))
 +        (make-directory file-notify--test-tmpfile)
 +	(should
 +	 (setq file-notify--test-desc
 +	       (file-notify-add-watch
 +		file-notify--test-tmpfile
 +		'(change) #'file-notify--test-event-handler)))
 +        (should (file-notify-valid-p file-notify--test-desc))
 +        ;; After removing the watch, the descriptor must not be valid
 +        ;; anymore.
 +        (file-notify-rm-watch file-notify--test-desc)
 +        (file-notify--wait-for-events
 +         (file-notify--test-timeout)
 +	 (not (file-notify-valid-p file-notify--test-desc)))
 +        (should-not (file-notify-valid-p file-notify--test-desc)))
 +
 +    ;; Cleanup.
 +    (file-notify--test-cleanup))
 +
 +  (unwind-protect
 +      ;; The batch-mode operation of w32notify is fragile (there's no
 +      ;; input threads to send the message to).
 +      (unless (and noninteractive
 +		   (string-equal (file-notify--test-library) "w32notify"))
 +        (setq file-notify--test-tmpfile
 +	      (file-name-as-directory (file-notify--test-make-temp-name)))
 +        (make-directory file-notify--test-tmpfile)
 +	(should
 +	 (setq file-notify--test-desc
 +	       (file-notify-add-watch
 +		file-notify--test-tmpfile
 +		'(change) #'file-notify--test-event-handler)))
 +        (should (file-notify-valid-p file-notify--test-desc))
 +        ;; After deleting the directory, the descriptor must not be
 +        ;; valid anymore.
 +        (delete-directory file-notify--test-tmpfile t)
 +        (file-notify--wait-for-events
 +	 (file-notify--test-timeout)
 +	 (not (file-notify-valid-p file-notify--test-desc)))
 +        (should-not (file-notify-valid-p file-notify--test-desc)))
 +
 +    ;; Cleanup.
 +    (file-notify--test-cleanup)))
 +
 +(file-notify--deftest-remote file-notify-test05-dir-validity
 +  "Check `file-notify-valid-p' via file notification for remote directories.")
 +
 +(ert-deftest file-notify-test06-many-events ()
 +  "Check that events are not dropped."
 +  :tags '(:expensive-test)
 +  (skip-unless (file-notify--test-local-enabled))
 +  ;; Under cygwin events arrive in random order.  Impossible to define a test.
 +  (skip-unless (not (eq system-type 'cygwin)))
 +
 +  (setq file-notify--test-tmpfile (file-notify--test-make-temp-name))
 +  (make-directory file-notify--test-tmpfile)
 +  (should
 +   (setq file-notify--test-desc
 +	 (file-notify-add-watch
 +	  file-notify--test-tmpfile
 +	  '(change) 'file-notify--test-event-handler)))
 +  (unwind-protect
 +      (let ((n 1000)
 +            source-file-list target-file-list
 +            (default-directory file-notify--test-tmpfile))
 +        (dotimes (i n)
 +	  ;; It matters which direction we rename, at least for
 +	  ;; kqueue.  This backend parses directories in alphabetic
 +	  ;; order (x%d before y%d).  So we rename both directions.
 +	  (if (zerop (mod i 2))
 +	      (progn
 +		(push (expand-file-name (format "x%d" i)) source-file-list)
 +		(push (expand-file-name (format "y%d" i)) target-file-list))
 +	    (push (expand-file-name (format "y%d" i)) source-file-list)
 +	    (push (expand-file-name (format "x%d" i)) target-file-list)))
 +        (file-notify--test-with-events (make-list (+ n n) 'created)
 +          (let ((source-file-list source-file-list)
 +                (target-file-list target-file-list))
 +            (while (and source-file-list target-file-list)
-               (read-event nil nil 0.1)
++              (read-event nil nil file-notify--test-read-event-timeout)
 +              (write-region "" nil (pop source-file-list) nil 'no-message)
-               (read-event nil nil 0.1)
++              (read-event nil nil file-notify--test-read-event-timeout)
 +              (write-region "" nil (pop target-file-list) nil 'no-message))))
 +        (file-notify--test-with-events
 +	    (cond
 +	     ;; w32notify fires both `deleted' and `renamed' events.
 +	     ((string-equal (file-notify--test-library) "w32notify")
 +	      (let (r)
 +		(dotimes (_i n r)
 +		  (setq r (append '(deleted renamed) r)))))
 +	     (t (make-list n 'renamed)))
 +          (let ((source-file-list source-file-list)
 +                (target-file-list target-file-list))
 +            (while (and source-file-list target-file-list)
-               (rename-file (pop source-file-list) (pop target-file-list) t)
-               (read-event nil nil 0.02))))
++              (read-event nil nil file-notify--test-read-event-timeout)
++              (rename-file (pop source-file-list) (pop target-file-list) t))))
 +        (file-notify--test-with-events (make-list n 'deleted)
 +          (dolist (file target-file-list)
-             (prog1 (delete-file file) (read-event nil nil 0.02)))))
++            (read-event nil nil file-notify--test-read-event-timeout)
++            (delete-file file) file-notify--test-read-event-timeout)))
++
++    ;; Cleanup.
 +    (file-notify--test-cleanup)))
 +
 +(file-notify--deftest-remote file-notify-test06-many-events
 +   "Check that events are not dropped for remote directories.")
 +
++(ert-deftest file-notify-test07-backup ()
++  "Check that backup keeps file notification."
++  (skip-unless (file-notify--test-local-enabled))
++
++  (unwind-protect
++      (progn
++        (setq file-notify--test-tmpfile (file-notify--test-make-temp-name))
++	(write-region "any text" nil file-notify--test-tmpfile nil 'no-message)
++	(should
++	 (setq file-notify--test-desc
++	       (file-notify-add-watch
++		file-notify--test-tmpfile
++		'(change) #'file-notify--test-event-handler)))
++        (should (file-notify-valid-p file-notify--test-desc))
++        (file-notify--test-with-events
++	    (cond
++             ;; For w32notify and in the remote case, there are two
++             ;; `changed' events.
++             ((or (string-equal (file-notify--test-library) "w32notify")
++                  (file-remote-p temporary-file-directory))
++              '(changed changed))
++             (t '(changed)))
++          ;; There shouldn't be any problem, because the file is kept.
++          (with-temp-buffer
++            (let ((buffer-file-name file-notify--test-tmpfile)
++                  (make-backup-files t)
++                  (backup-by-copying t)
++                  (kept-new-versions 1)
++                  (delete-old-versions t))
++              (insert "another text")
++              (save-buffer))))
++        ;; After saving the buffer, the descriptor is still valid.
++        (should (file-notify-valid-p file-notify--test-desc))
++	(delete-file file-notify--test-tmpfile))
++
++    ;; Cleanup.
++    (file-notify--test-cleanup))
++
++  (unwind-protect
++      (progn
++        ;; It doesn't work for kqueue, because we don't use an
++        ;; implicit directory monitor.
++        (unless (string-equal (file-notify--test-library) "kqueue")
++	  (setq file-notify--test-tmpfile (file-notify--test-make-temp-name))
++	  (write-region
++	   "any text" nil file-notify--test-tmpfile nil 'no-message)
++	  (should
++	   (setq file-notify--test-desc
++		 (file-notify-add-watch
++		  file-notify--test-tmpfile
++		  '(change) #'file-notify--test-event-handler)))
++	  (should (file-notify-valid-p file-notify--test-desc))
++	  (file-notify--test-with-events '(renamed created changed)
++	    ;; The file is renamed when creating a backup.  It shall
++	    ;; still be watched.
++	    (with-temp-buffer
++	      (let ((buffer-file-name file-notify--test-tmpfile)
++		    (make-backup-files t)
++		    (backup-by-copying nil)
++		    (backup-by-copying-when-mismatch nil)
++		    (kept-new-versions 1)
++		    (delete-old-versions t))
++		(insert "another text")
++		(save-buffer))))
++	  ;; After saving the buffer, the descriptor is still valid.
++	  (should (file-notify-valid-p file-notify--test-desc))
++	  (delete-file file-notify--test-tmpfile)))
++
++    ;; Cleanup.
++    (file-notify--test-cleanup)))
++
++(file-notify--deftest-remote file-notify-test07-backup
++  "Check that backup keeps file notification for remote files.")
++
 +(defun file-notify-test-all (&optional interactive)
 +  "Run all tests for \\[file-notify]."
 +  (interactive "p")
 +  (if interactive
 +      (ert-run-tests-interactively "^file-notify-")
 +    (ert-run-tests-batch "^file-notify-")))
 +
 +;; TODO:
 +
 +;; * For w32notify, no stopped events arrive when a directory is removed.
 +;; * Check, why cygwin recognizes only `deleted' and `stopped' events.
 +
 +(provide 'file-notify-tests)
 +;;; file-notify-tests.el ends here