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Fix bugs in dabbrev-expand (bug#74090)

Browse Source 
* lisp/dabbrev.el (dabbrev-expand): Use the buffer where the
expansion was found when setting the internal variables used to
determine the next expansion or a replacement expansion.

* test/lisp/dabbrev-tests.el (ert-x): Require for
'ert-with-temp-directory', 'ert-resource-directory' and
'ert-resource-file'.
(with-dabbrev-test): New macro.
(dabbrev-expand-test-same-buffer-{1,2,3,4})
(dabbrev-expand-test-other-buffer-{1,2,3,4})
(dabbrev-expand-test-minibuffer-{1,2,3,4}): New tests.

* test/lisp/dabbrev-resources/dabbrev-expand.el:
* test/lisp/dabbrev-resources/INSTALL_BEGIN: New test resources.

(cherry picked from commit f6c359cb66)
This commit is contained in:
Stephen Berman 2024-10-31 10:46:27 +01:00
parent 3101c5031e
commit 8113b5c562
4 changed files with 542 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

65
lisp/dabbrev.el
View File

@ -464,8 +464,21 @@ direction of search to backward if set non-nil.
See also `dabbrev-abbrev-char-regexp' and \\[dabbrev-completion]."
(interactive "*P")
(let (abbrev record-case-pattern
expansion old direction (orig-point (point)))
;; There are three possible sources of the expansion, which we need to
;; check in a specific order:
(let ((buf (cond ((window-minibuffer-p)
;; If we invoked dabbrev-expand in the minibuffer,
;; this is the buffer from which we entered the
;; minibuffer.
(window-buffer (get-mru-window)))
;; Otherwise, if we found the expansion in another
;; buffer, use that buffer for further expansions.
(dabbrev--last-buffer-found dabbrev--last-buffer-found)
;; Otherwise, use the buffer where we invoked
;; dabbrev-expand.
(t (current-buffer))))
abbrev record-case-pattern expansion old direction
(orig-point (point)))
;; abbrev -- the abbrev to expand
;; expansion -- the expansion found (eventually) or nil until then
;; old -- the text currently in the buffer
@ -480,6 +493,7 @@ See also `dabbrev-abbrev-char-regexp' and \\[dabbrev-completion]."
(point)))))
;; Find a different expansion for the same abbrev as last time.
(progn
(setq dabbrev--last-buffer-found nil)
(setq abbrev dabbrev--last-abbreviation)
(setq old dabbrev--last-expansion)
(setq direction dabbrev--last-direction))
@ -488,7 +502,14 @@ See also `dabbrev-abbrev-char-regexp' and \\[dabbrev-completion]."
(if (and (eq (preceding-char) ?\s)
(markerp dabbrev--last-abbrev-location)
(marker-position dabbrev--last-abbrev-location)
(= (point) (1+ dabbrev--last-abbrev-location)))
;; Comparing with point only makes sense in the buffer
;; where we called dabbrev-expand, but if that differs
;; from the buffer containing the expansion, we want to
;; get the next word in the latter buffer, so we skip
;; the comparison.
(if (eq buf (current-buffer))
(= (point) (1+ dabbrev--last-abbrev-location))
t))
(progn
;; The "abbrev" to expand is just the space.
(setq abbrev " ")
@ -549,29 +570,43 @@ See also `dabbrev-abbrev-char-regexp' and \\[dabbrev-completion]."
(if old " further" "") abbrev))
(t
(if (not (or (eq dabbrev--last-buffer dabbrev--last-buffer-found)
(minibuffer-window-active-p (selected-window))))
;; If we are in the minibuffer and an expansion has
;; been found but dabbrev--last-buffer-found is not
;; yet set, we need to set it now.
(and dabbrev--last-buffer-found
(minibuffer-window-active-p (selected-window)))))
(progn
(when (buffer-name dabbrev--last-buffer)
(message "Expansion found in `%s'"
(buffer-name dabbrev--last-buffer)))
(setq dabbrev--last-buffer-found dabbrev--last-buffer))
(message nil))
(if (and (or (eq (current-buffer) dabbrev--last-buffer)
(null dabbrev--last-buffer)
(buffer-live-p dabbrev--last-buffer))
(numberp dabbrev--last-expansion-location)
(and (> dabbrev--last-expansion-location (point))))
(setq dabbrev--last-expansion-location
(copy-marker dabbrev--last-expansion-location)))
;; To get correct further expansions we have to be sure to use the
;; buffer containing the already found expansions.
(when dabbrev--last-buffer-found
(setq buf dabbrev--last-buffer-found))
;; If the buffer where we called dabbrev-expand differs from the
;; buffer containing the expansion, make sure copy-marker is
;; called in the latter buffer.
(with-current-buffer buf
(if (and (or (eq (current-buffer) dabbrev--last-buffer)
(null dabbrev--last-buffer)
(buffer-live-p dabbrev--last-buffer))
(numberp dabbrev--last-expansion-location)
(and (> dabbrev--last-expansion-location (point))))
(setq dabbrev--last-expansion-location
(copy-marker dabbrev--last-expansion-location))))
;; Success: stick it in and return.
(setq buffer-undo-list (cons orig-point buffer-undo-list))
(setq expansion (dabbrev--substitute-expansion old abbrev expansion
record-case-pattern))
;; Save state for re-expand.
(setq dabbrev--last-expansion expansion)
(setq dabbrev--last-abbreviation abbrev)
(setq dabbrev--last-abbrev-location (point-marker))))))
;; Save state for re-expand (making sure it's the state of the
;; buffer containing the already found expansions).
(with-current-buffer buf
(setq dabbrev--last-expansion expansion)
(setq dabbrev--last-abbreviation abbrev)
(setq dabbrev--last-abbrev-location (point-marker)))))))
;;----------------------------------------------------------------
;; Local functions

153
test/lisp/dabbrev-resources/INSTALL_BEGIN Normal file
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@ -0,0 +1,153 @@
GNU Emacs Installation Guide
Copyright (C) 1992, 1994, 1996-1997, 2000-2024 Free Software Foundation,
Inc.
See the end of the file for license conditions.
This file contains general information on building GNU Emacs. If you
are building an Emacs release tarball on a Unix or a GNU system, the
instructions in this file should be sufficient. For other
configurations, we have additional specialized files:
. INSTALL.REPO if you build from a Git checkout
. nt/INSTALL if you build for MS-Windows
. nextstep/INSTALL if you build for GNUstep/macOS
. java/INSTALL if you build for Android
. msdos/INSTALL if you build for MS-DOS
BASIC INSTALLATION
On most Unix systems, you build Emacs by first running the 'configure'
shell script. This attempts to deduce the correct values for
various system-dependent variables and features, and find the
directories where certain system headers and libraries are kept.
In a few cases, you may need to explicitly tell configure where to
find some things, or what options to use.
'configure' creates a 'Makefile' in several subdirectories, and a
'src/config.h' file containing system-dependent definitions.
Running the 'make' utility then builds the package for your system.
Building Emacs requires GNU make, <https://www.gnu.org/software/make/>.
On most systems that Emacs supports, this is the default 'make' program.
Here's the procedure to build Emacs using 'configure' on systems which
are supported by it. In some cases, if the simplified procedure fails,
you might need to use various non-default options, and maybe perform
some of the steps manually. The more detailed description in the other
sections of this guide will help you do that, so please refer to those
sections if you need to.
1. Obtain and unpack the Emacs release, with commands like this:
wget https://ftp.gnu.org/gnu/emacs/emacs-VERSION.tar.xz
tar -xf emacs-VERSION.tar.xz
where VERSION is the Emacs version number.
2a. 'cd' to the directory where you unpacked Emacs and invoke the
'configure' script:
./configure
2b. Alternatively, create a separate directory, outside the source
directory, where you want to build Emacs, and invoke 'configure'
from there:
SOURCE-DIR/configure
where SOURCE-DIR is the top-level Emacs source directory.
2c. If you don't have write access to the default directory where
Emacs and its data files will be installed, specify an alternative
installation directory:
./configure --prefix=/SOME/OTHER/DIRECTORY
where /SOME/OTHER/DIRECTORY is a directory writable by your user,
for example, a subdirectory of your home directory.
3. When 'configure' finishes, it prints several lines of details
about the system configuration. Read those details carefully
looking for anything suspicious, such as wrong CPU and operating
system names, wrong places for headers or libraries, missing
libraries that you know are installed on your system, etc.
If you find anything wrong, you may have to pass to 'configure'
one or more options specifying the explicit machine configuration
name, where to find various headers and libraries, etc.
Refer to the section DETAILED BUILDING AND INSTALLATION below.
If 'configure' didn't find some image support libraries, such as
Xpm and jpeg, refer to "Image support libraries" below.
If the details printed by 'configure' don't make any sense to
you, but there are no obvious errors, assume that 'configure' did
its job and proceed.
4. Invoke the 'make' program:
make
5. If 'make' succeeds, it will build an executable program 'emacs'
in the 'src' directory. You can try this program, to make sure
it works:
src/emacs -Q
To test Emacs further (intended mostly to help developers):
make check
6. Assuming that the program 'src/emacs' starts and displays its
opening screen, you can install the program and its auxiliary
files into their installation directories:
make install
You are now ready to use Emacs. If you wish to conserve space,
you may remove the program binaries and object files from the
directory where you built Emacs:
make clean
You can delete the entire build directory if you do not plan to
build Emacs again, but it can be useful to keep for debugging.
If you want to build Emacs again with different configure options,
first clean the source directories:
make distclean
Note that the install automatically saves space by compressing
(provided you have the 'gzip' program) those installed Lisp source (.el)
files that have corresponding .elc versions, as well as the Info files.
You can read a brief summary about common make targets:
make help
ADDITIONAL DISTRIBUTION FILES
* Complex Text Layout support libraries
On GNU and Unix systems, Emacs needs optional libraries to correctly
display such complex scripts as Indic and Khmer, and also for scripts
that require Arabic shaping support (Arabic and Farsi). If the
HarfBuzz library is installed, Emacs will build with it and use it for
this purpose. HarfBuzz is the preferred shaping engine, both on Posix
hosts and on MS-Windows, so we recommend installing it before building
Emacs. The alternative for GNU/Linux and Posix systems is to use the
"m17n-db", "libm17n-flt", and "libotf" libraries. (On some systems,
particularly GNU/Linux, these libraries may be already present or
available as additional packages.) Note that if there is a separate
'dev' or 'devel' package, for use at compilation time rather than run
time, you will need that as well as the corresponding run time
package; typically the dev package will contain header files and a
library archive. On MS-Windows, if HarfBuzz is not available, Emacs
will use the Uniscribe shaping engine that is part of the OS.
Note that Emacs cannot support complex scripts on a TTY, unless the
terminal includes such a support. However, most modern terminal
emulators, such as xterm, do support such scripts.

132
test/lisp/dabbrev-resources/dabbrev-expand.el Normal file
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@ -0,0 +1,132 @@
(defun dabbrev-expand (arg)
"Expand previous word \"dynamically\".
Expands to the most recent, preceding word for which this is a prefix.
If no suitable preceding word is found, words following point are
considered. If still no suitable word is found, then look in the
buffers accepted by the function pointed out by variable
`dabbrev-friend-buffer-function', if `dabbrev-check-other-buffers'
says so. Then, if `dabbrev-check-all-buffers' is non-nil, look in
all the other buffers, subject to constraints specified
by `dabbrev-ignored-buffer-names' and `dabbrev-ignored-buffer-regexps'.
A positive prefix argument, N, says to take the Nth backward *distinct*
possibility. A negative argument says search forward.
If the cursor has not moved from the end of the previous expansion and
no argument is given, replace the previously-made expansion
with the next possible expansion not yet tried.
The variable `dabbrev-backward-only' may be used to limit the
direction of search to backward if set non-nil.
See also `dabbrev-abbrev-char-regexp' and \\[dabbrev-completion]."
(interactive "*P")
(let (abbrev record-case-pattern
expansion old direction (orig-point (point)))
;; abbrev -- the abbrev to expand
;; expansion -- the expansion found (eventually) or nil until then
;; old -- the text currently in the buffer
;; (the abbrev, or the previously-made expansion)
(save-excursion
(if (and (null arg)
(markerp dabbrev--last-abbrev-location)
(marker-position dabbrev--last-abbrev-location)
(or (eq last-command this-command)
(and (window-minibuffer-p)
(= dabbrev--last-abbrev-location
(point)))))
;; Find a different expansion for the same abbrev as last time.
(progn
(setq abbrev dabbrev--last-abbreviation)
(setq old dabbrev--last-expansion)
(setq direction dabbrev--last-direction))
;; If the user inserts a space after expanding
;; and then asks to expand again, always fetch the next word.
(if (and (eq (preceding-char) ?\s)
(markerp dabbrev--last-abbrev-location)
(marker-position dabbrev--last-abbrev-location)
(= (point) (1+ dabbrev--last-abbrev-location)))
(progn
;; The "abbrev" to expand is just the space.
(setq abbrev " ")
(save-excursion
(save-restriction
(widen)
(if (buffer-live-p dabbrev--last-buffer)
(set-buffer dabbrev--last-buffer))
;; Find the end of the last "expansion" word.
(if (or (eq dabbrev--last-direction 1)
(and (eq dabbrev--last-direction 0)
(< dabbrev--last-expansion-location (point))))
(setq dabbrev--last-expansion-location
(+ dabbrev--last-expansion-location
(length dabbrev--last-expansion))))
(goto-char dabbrev--last-expansion-location)
;; Take the following word, with intermediate separators,
;; as our expansion this time.
(re-search-forward
(concat "\\(?:" dabbrev--abbrev-char-regexp "\\)+"))
(setq expansion (buffer-substring-no-properties
dabbrev--last-expansion-location (point)))
;; Record the end of this expansion, in case we repeat this.
(setq dabbrev--last-expansion-location (point))))
;; Indicate that dabbrev--last-expansion-location is
;; at the end of the expansion.
(setq dabbrev--last-direction -1))
;; We have a different abbrev to expand.
(dabbrev--reset-global-variables)
(setq direction (if (null arg)
(if dabbrev-backward-only 1 0)
(prefix-numeric-value arg)))
(setq abbrev (dabbrev--abbrev-at-point))
(setq record-case-pattern t)
(setq old nil)))
;;--------------------------------
;; Find the expansion
;;--------------------------------
(or expansion
(setq expansion
(dabbrev--find-expansion
abbrev direction
(dabbrev--ignore-case-p abbrev)))))
(cond
((not expansion)
(dabbrev--reset-global-variables)
(if old
(save-excursion
(setq buffer-undo-list (cons orig-point buffer-undo-list))
;; Put back the original abbrev with its original case pattern.
(search-backward old)
(insert abbrev)
(delete-region (point) (+ (point) (length old)))))
(user-error "No%s dynamic expansion for `%s' found"
(if old " further" "") abbrev))
(t
(if (not (or (eq dabbrev--last-buffer dabbrev--last-buffer-found)
(minibuffer-window-active-p (selected-window))))
(progn
(when (buffer-name dabbrev--last-buffer)
(message "Expansion found in `%s'"
(buffer-name dabbrev--last-buffer)))
(setq dabbrev--last-buffer-found dabbrev--last-buffer))
(message nil))
(if (and (or (eq (current-buffer) dabbrev--last-buffer)
(null dabbrev--last-buffer)
(buffer-live-p dabbrev--last-buffer))
(numberp dabbrev--last-expansion-location)
(and (> dabbrev--last-expansion-location (point))))
(setq dabbrev--last-expansion-location
(copy-marker dabbrev--last-expansion-location)))
;; Success: stick it in and return.
(setq buffer-undo-list (cons orig-point buffer-undo-list))
(setq expansion (dabbrev--substitute-expansion old abbrev expansion
record-case-pattern))
;; Save state for re-expand.
(setq dabbrev--last-expansion expansion)
(setq dabbrev--last-abbreviation abbrev)
(setq dabbrev--last-abbrev-location (point-marker))))))

207
test/lisp/dabbrev-tests.el
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@ -25,6 +25,7 @@
;;; Code:
(require 'ert)
(require 'ert-x)
(require 'dabbrev)
(ert-deftest dabbrev-expand-test ()
@ -68,4 +69,210 @@ multiple expansions."
(execute-kbd-macro (kbd "C-u C-u C-M-/")))
(should (string= (buffer-string) "abc\na")))))
(defmacro with-dabbrev-test (&rest body)
"Set up an isolated `dabbrev' test environment."
(declare (debug (body)))
`(ert-with-temp-directory dabbrev-test-home
(let* (;; Since we change HOME, clear this to avoid a conflict
;; e.g. if Emacs runs within the user's home directory.
(abbreviated-home-dir nil)
(process-environment (cons (format "HOME=%s" dabbrev-test-home)
process-environment))
(dabbrev-directory (ert-resource-directory)))
(unwind-protect
(progn ,@body)
;; Restore pre-test-run state of test files.
(dolist (f (directory-files dabbrev-directory))
(let ((buf (get-file-buffer f)))
(when buf
(with-current-buffer buf
(restore-buffer-modified-p nil)
(kill-buffer)))))
(dabbrev--reset-global-variables)))))
(ert-deftest dabbrev-expand-test-same-buffer-1 ()
"Test expanding a string twice within a single buffer.
The first expansion should expand the input (a prefix-string) to a
string in the buffer containing no whitespace character, the second
expansion, after adding a space to the first expansion, should extend
the string with the following string in the buffer up to the next
whitespace character."
(with-dabbrev-test
(find-file (ert-resource-file "INSTALL_BEGIN"))
(goto-char (point-max))
(terpri)
(execute-kbd-macro (kbd "Ind M-/"))
(should (string= (buffer-substring (pos-bol) (pos-eol)) "Indic"))
(execute-kbd-macro (kbd "SPC M-/"))
(should (string= (buffer-substring (pos-bol) (pos-eol)) "Indic and"))))
(ert-deftest dabbrev-expand-test-same-buffer-2 ()
"Test expanding a string plus space twice within a single buffer.
Each expansion should extend the string with the following string in the
buffer up to the next whitespace character."
(with-dabbrev-test
(find-file (ert-resource-file "INSTALL_BEGIN"))
(goto-char (point-max))
(terpri)
(execute-kbd-macro (kbd "Indic SPC M-/"))
(should (string= (buffer-substring (pos-bol) (pos-eol)) "Indic and"))
(execute-kbd-macro (kbd "SPC M-/"))
(should (string= (buffer-substring (pos-bol) (pos-eol)) "Indic and Khmer"))))
(ert-deftest dabbrev-expand-test-same-buffer-3 ()
"Test replacing an expansion within a single buffer."
(with-dabbrev-test
(find-file (ert-resource-file "INSTALL_BEGIN"))
(goto-char (point-max))
(terpri)
(insert-file-contents (ert-resource-file "dabbrev-expand.el"))
(goto-char (point-max))
(terpri)
(execute-kbd-macro (kbd "Ind M-/"))
(should (string= (buffer-substring (pos-bol) (pos-eol)) "Indicate"))
(kill-whole-line)
(execute-kbd-macro (kbd "Ind M-/ M-/"))
(should (string= (buffer-substring (pos-bol) (pos-eol)) "Indic"))
(execute-kbd-macro (kbd "SPC M-/"))
(should (string= (buffer-substring (pos-bol) (pos-eol)) "Indic and"))))
(ert-deftest dabbrev-expand-test-same-buffer-4 ()
"Test expanding a string in a narrowed-region."
(with-dabbrev-test
(let (disabled-command-function) ; Enable narrow-to-region.
(find-file (ert-resource-file "INSTALL_BEGIN"))
(goto-char (point-min))
(execute-kbd-macro (kbd "C-s Ind M-a C-SPC M-} C-x n n"))
(goto-char (point-max))
(terpri)
(execute-kbd-macro (kbd "Ind M-/"))
(should (string= (buffer-substring (pos-bol) (pos-eol)) "Indic"))
(execute-kbd-macro (kbd "SPC M-/"))
(should (string= (buffer-substring (pos-bol) (pos-eol)) "Indic and")))))
(ert-deftest dabbrev-expand-test-other-buffer-1 ()
"Test expanding a prefix string to a string from another buffer."
(with-dabbrev-test
(find-file (ert-resource-file "INSTALL_BEGIN"))
(switch-to-buffer (get-buffer-create "a" t))
(execute-kbd-macro (kbd "Ind M-/"))
(should (string= (buffer-string) "Indic"))
(execute-kbd-macro (kbd "SPC M-/"))
(should (string= (buffer-string) "Indic and"))
(kill-buffer "a")))
(ert-deftest dabbrev-expand-test-other-buffer-2 ()
"Test expanding a string + space to a string from another buffer."
(with-dabbrev-test
(find-file (ert-resource-file "INSTALL_BEGIN"))
(switch-to-buffer (get-buffer-create "a" t))
(execute-kbd-macro (kbd "Indic SPC M-/"))
(should (string= (buffer-string) "Indic and"))
(execute-kbd-macro (kbd "SPC M-/"))
(should (string= (buffer-string) "Indic and Khmer"))
(kill-buffer "a")))
(ert-deftest dabbrev-expand-test-other-buffer-3 ()
"Test replacing an expansion with three different buffers.
A prefix string in a buffer should find the first expansion in a
different buffer and then find a replacement expansion is yet another
buffer."
(with-dabbrev-test
(find-file (ert-resource-file "INSTALL_BEGIN"))
(find-file (ert-resource-file "dabbrev-expand.el"))
(switch-to-buffer (get-buffer-create "a" t))
(emacs-lisp-mode)
(execute-kbd-macro (kbd "Ind M-/"))
(should (string= (buffer-string) "Indicate"))
(erase-buffer)
(execute-kbd-macro (kbd "Ind M-/ M-/"))
(should (string= (buffer-string) "Indic"))
(execute-kbd-macro (kbd "SPC M-/"))
(should (string= (buffer-string) "Indic and"))
(kill-buffer "a")))
(ert-deftest dabbrev-expand-test-other-buffer-4 ()
"Test expanding a string using another narrowed buffer."
(with-dabbrev-test
(let (disabled-command-function) ; Enable narrow-to-region.
(find-file (ert-resource-file "INSTALL_BEGIN"))
(goto-char (point-min))
(execute-kbd-macro (kbd "C-s Ind M-a C-SPC M-} C-x n n"))
(switch-to-buffer (get-buffer-create "a" t))
(execute-kbd-macro (kbd "Ind M-/"))
(should (string= (buffer-string) "Indic"))
(execute-kbd-macro (kbd "SPC M-/"))
(should (string= (buffer-string) "Indic and"))
(kill-buffer "a"))))
(ert-deftest dabbrev-expand-test-minibuffer-1 ()
"Test expanding a prefix string twice in the minibuffer.
Both expansions should come from the buffer from which the minibuffer
was entered."
(with-dabbrev-test
(find-file (ert-resource-file "INSTALL_BEGIN"))
(with-selected-window (minibuffer-window)
(insert "Ind")
(dabbrev-expand nil)
(should (string= (minibuffer-contents) "Indic"))
(insert " ")
(dabbrev-expand nil)
(should (string= (minibuffer-contents) "Indic and"))
(delete-minibuffer-contents))))
(ert-deftest dabbrev-expand-test-minibuffer-2 ()
"Test expanding a string + space in the minibuffer.
The expansions should come from the buffer from which the minibuffer was
entered."
(with-dabbrev-test
(find-file (ert-resource-file "INSTALL_BEGIN"))
(with-selected-window (minibuffer-window)
(insert "Indic ")
(dabbrev-expand nil)
(should (string= (minibuffer-contents) "Indic and"))
(insert " ")
(dabbrev-expand nil)
(should (string= (buffer-string) "Indic and Khmer"))
(delete-minibuffer-contents))))
;; FIXME: Why is dabbrev--reset-global-variables needed here?
(ert-deftest dabbrev-expand-test-minibuffer-3 ()
"Test replacing an expansion in the minibuffer using two buffers.
The first expansion should befound in the buffer from which the
minibuffer was entered, the replacement should found in another buffer."
(with-dabbrev-test
(find-file (ert-resource-file "INSTALL_BEGIN"))
(find-file (ert-resource-file "dabbrev-expand.el"))
(with-selected-window (minibuffer-window)
(insert "Ind")
(dabbrev-expand nil)
(should (string= (minibuffer-contents) "Indicate"))
(kill-whole-line)
(dabbrev--reset-global-variables)
(insert "Ind")
(dabbrev-expand nil)
(dabbrev-expand nil)
(should (string= (minibuffer-contents) "Indic"))
(dabbrev--reset-global-variables)
(insert " ")
(dabbrev-expand nil)
(should (string= (minibuffer-contents) "Indic and"))
(delete-minibuffer-contents))))
(ert-deftest dabbrev-expand-test-minibuffer-4 ()
"Test expansion in the minibuffer using another narrowed buffer."
(with-dabbrev-test
(let (disabled-command-function) ; Enable narrow-to-region.
(find-file (ert-resource-file "INSTALL_BEGIN"))
(goto-char (point-min))
(execute-kbd-macro (kbd "C-s Ind M-a C-SPC M-} C-x n n")))
(with-selected-window (minibuffer-window)
(insert "Ind")
(dabbrev-expand nil)
(should (string= (minibuffer-contents) "Indic"))
(insert " ")
(dabbrev-expand nil)
(should (string= (minibuffer-contents) "Indic and"))
(delete-minibuffer-contents))))
;;; dabbrev-tests.el ends here