;;; buffer-tests.el --- tests for buffer.c functions -*- lexical-binding: t -*-

;; Copyright (C) 2015-2022 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 'seq)
(require 'ert-x)
(require 'cl-lib)
(require 'let-alist)

(defun overlay-tests-start-recording-modification-hooks (overlay)
  "Start recording modification hooks on OVERLAY.

Always overwrites the `insert-in-front-hooks',
`modification-hooks' and `insert-behind-hooks' properties.  Any
recorded history from a previous call is erased.

The history is stored in a property on the overlay itself.  Call
`overlay-tests-get-recorded-modification-hooks' to retrieve the
recorded calls conveniently."
  (dolist (hooks-property '(insert-in-front-hooks
                            modification-hooks
                            insert-behind-hooks))
    (overlay-put
     overlay
     hooks-property
     (list (lambda (ov &rest args)
             (message "  %S called on %S with args %S" hooks-property ov args)
             (should inhibit-modification-hooks)
             (should (eq ov overlay))
             (push (list hooks-property args)
                   (overlay-get overlay
                                'recorded-modification-hook-calls)))))
    (overlay-put overlay 'recorded-modification-hook-calls nil)))

(defun overlay-tests-get-recorded-modification-hooks (overlay)
  "Extract the recorded calls made to modification hooks on OVERLAY.

Must be preceded by a call to
`overlay-tests-start-recording-modification-hooks' on OVERLAY.

Returns a list.  Each element of the list represents a recorded
call to a particular modification hook.

Each call is itself a sub-list where the first element is a
symbol matching the modification hook property (one of
`insert-in-front-hooks', `modification-hooks' or
`insert-behind-hooks') and the second element is the list of
arguments passed to the hook.  The first hook argument, the
overlay itself, is omitted to make test result verification
easier."
  (reverse (overlay-get overlay
                        'recorded-modification-hook-calls)))

(ert-deftest overlay-modification-hooks ()
  "Test the basic functionality of overlay modification hooks.

This exercises hooks registered on the `insert-in-front-hooks',
`modification-hooks' and `insert-behind-hooks' overlay
properties."
    ;; This is a data driven test loop.  Each test case is described
    ;; by an alist.  The test loop initializes a new temporary buffer
    ;; for each case, creates an overlay, registers modification hooks
    ;; on the overlay, modifies the buffer, and then verifies which
    ;; modification hooks (if any) were called for the overlay, as
    ;; well as which arguments were passed to the hooks.
    ;;
    ;; The following keys are available in the alist:
    ;;
    ;; `buffer-text': the initial buffer text of the temporary buffer.
    ;; Defaults to "1234".
    ;;
    ;; `overlay-beg' and `overlay-end': the begin and end positions of
    ;; the overlay under test.  Defaults to 2 and 4 respectively.
    ;;
    ;; `insert-at': move to the given position and insert the string
    ;; "x" into the test case's buffer.
    ;;
    ;; `replace': replace the first occurrence of the given string in
    ;; the test case's buffer with "x".  The test will fail if the
    ;; string is not found.
    ;;
    ;; `expected-calls': a description of the expected buffer
    ;; modification hooks.  See
    ;; `overlay-tests-get-recorded-modification-hooks' for the format.
    ;; May be omitted, in which case the test will insist that no
    ;; modification hooks are called.
    ;;
    ;; The test will fail itself in the degenerate case where no
    ;; buffer modifications are requested.
    (dolist (test-case
             '(
               ;; Remember that the default buffer text is "1234" and
               ;; the default overlay begins at position 2 and ends at
               ;; position 4.  Most of the test cases below assume
               ;; this.

               ;; TODO: (info "(elisp) Special Properties") says this
               ;; about `modification-hooks': "Furthermore, insertion
               ;; will not modify any existing character, so this hook
               ;; will only be run when removing some characters,
               ;; replacing them with others, or changing their
               ;; text-properties."  So, why are modification-hooks
               ;; being called when inserting at position 3 below?
               ((insert-at . 1))
               ((insert-at . 2)
                (expected-calls . ((insert-in-front-hooks (nil 2 2))
                                   (insert-in-front-hooks (t 2 3 0)))))
               ((insert-at . 3)
                (expected-calls . ((modification-hooks (nil 3 3))
                                   (modification-hooks (t 3 4 0)))))
               ((insert-at . 4)
                (expected-calls . ((insert-behind-hooks (nil 4 4))
                                   (insert-behind-hooks (t 4 5 0)))))
               ((insert-at . 5))

               ;; Replacing text never calls `insert-in-front-hooks'
               ;; or `insert-behind-hooks'.  It calls
               ;; `modification-hooks' if the overlay covers any text
               ;; that has changed.
               ((replace . "1"))
               ((replace . "2")
                (expected-calls . ((modification-hooks (nil 2 3))
                                   (modification-hooks (t 2 3 1)))))
               ((replace . "3")
                (expected-calls . ((modification-hooks (nil 3 4))
                                   (modification-hooks (t 3 4 1)))))
               ((replace . "4"))
               ((replace . "12")
                (expected-calls . ((modification-hooks (nil 1 3))
                                   (modification-hooks (t 1 2 2)))))
               ((replace . "23")
                (expected-calls . ((modification-hooks (nil 2 4))
                                   (modification-hooks (t 2 3 2)))))
               ((replace . "34")
                (expected-calls . ((modification-hooks (nil 3 5))
                                   (modification-hooks (t 3 4 2)))))
               ((replace . "123")
                (expected-calls . ((modification-hooks (nil 1 4))
                                   (modification-hooks (t 1 2 3)))))
               ((replace . "234")
                (expected-calls . ((modification-hooks (nil 2 5))
                                   (modification-hooks (t 2 3 3)))))
               ((replace . "1234")
                (expected-calls . ((modification-hooks (nil 1 5))
                                   (modification-hooks (t 1 2 4)))))

               ;; Inserting at the position of a zero-length overlay
               ;; calls both `insert-in-front-hooks' and
               ;; `insert-behind-hooks'.
               ((buffer-text . "") (overlay-beg . 1) (overlay-end . 1)
                (insert-at . 1)
                (expected-calls . ((insert-in-front-hooks
                                    (nil 1 1))
                                   (insert-behind-hooks
                                    (nil 1 1))
                                   (insert-in-front-hooks
                                    (t 1 2 0))
                                   (insert-behind-hooks
                                    (t 1 2 0)))))))
      (message "BEGIN overlay-modification-hooks test-case %S" test-case)

      ;; All three hooks ignore the overlay's `front-advance' and
      ;; `rear-advance' option, so test both ways while expecting the same
      ;; result.
      (dolist (advance '(nil t))
        (message "  advance is %S" advance)
        (let-alist test-case
          (with-temp-buffer
            ;; Set up the temporary buffer and overlay as specified by
            ;; the test case.
            (insert (or .buffer-text "1234"))
            (let ((overlay (make-overlay
                            (or .overlay-beg 2)
                            (or .overlay-end 4)
                            nil
                            advance advance)))
              (message "  (buffer-string) is %S" (buffer-string))
              (message "  overlay is %S" overlay)
              (overlay-tests-start-recording-modification-hooks overlay)

              ;; Modify the buffer, possibly inducing calls to the
              ;; overlay's modification hooks.
              (should (or .insert-at .replace))
              (when .insert-at
                (goto-char .insert-at)
                (insert "x")
                (message "  inserted \"x\" at %S, buffer-string now %S"
                         .insert-at (buffer-string)))
              (when .replace
                (goto-char (point-min))
                (search-forward .replace)
                (replace-match "x")
                (message "  replaced %S with \"x\"" .replace))

              ;; Verify that the expected and actual modification hook
              ;; calls match.
              (should (equal
                       .expected-calls
                       (overlay-tests-get-recorded-modification-hooks
                        overlay)))))))))

(ert-deftest overlay-modification-hooks-message-other-buf ()
  "Test for bug#21824.
After a modification-hook has been run and there is an overlay in
the *Messages* buffer, the message coalescing [2 times] wrongly
runs the modification-hook of the overlay in the 1st buffer, but
with parameters from the *Messages* buffer modification."
  (let ((buf nil)
        (msg-ov nil))
    (with-temp-buffer
      (insert "123")
      (overlay-put (make-overlay 1 3)
                   'modification-hooks
                   (list (lambda (&rest _)
                           (setq buf (current-buffer)))))
      (goto-char 2)
      (insert "x")
      (unwind-protect
          (progn
            (setq msg-ov (make-overlay 1 1 (get-buffer-create "*Messages*")))
            (message "a message")
            (message "a message")
            (should (eq buf (current-buffer))))
        (when msg-ov (delete-overlay msg-ov))))))

(ert-deftest overlay-modification-hooks-deleted-overlay ()
  "Test for bug#30823."
  (let ((check-point nil)
	(ov-delete nil)
	(ov-set nil))
    (with-temp-buffer
      (insert "abc")
      (setq ov-set (make-overlay 1 3))
      (overlay-put ov-set 'modification-hooks
		   (list (lambda (_o after &rest _args)
			   (and after (setq check-point t)))))
      (setq ov-delete (make-overlay 1 3))
      (overlay-put ov-delete 'modification-hooks
		   (list (lambda (o after &rest _args)
			   (and (not after) (delete-overlay o)))))
      (goto-char 2)
      (insert "1")
      (should (eq check-point t)))))

(ert-deftest test-generate-new-buffer-name-bug27966 ()
  (should-not (string-equal "nil"
                            (progn (get-buffer-create "nil")
                                   (generate-new-buffer-name "nil")))))

(ert-deftest test-buffer-base-buffer-indirect ()
  (with-temp-buffer
    (let* ((ind-buf-name (generate-new-buffer-name "indbuf"))
           (ind-buf (make-indirect-buffer (current-buffer) ind-buf-name)))
      (should (eq (buffer-base-buffer ind-buf) (current-buffer))))))

(ert-deftest test-buffer-base-buffer-non-indirect ()
  (with-temp-buffer
    (should (eq (buffer-base-buffer (current-buffer)) nil))))

(ert-deftest overlay-evaporation-after-killed-buffer ()
  (let* ((ols (with-temp-buffer
                (insert "toto")
                (list
                 (make-overlay (point-min) (point-max))
                 (make-overlay (point-min) (point-max))
                 (make-overlay (point-min) (point-max)))))
         (ol (nth 1 ols)))
    (overlay-put ol 'evaporate t)
    ;; Evaporation within move-overlay of an overlay that was deleted because
    ;; of a kill-buffer, triggered an assertion failure in unchain_both.
    (with-temp-buffer
      (insert "toto")
      (move-overlay ol (point-min) (point-min)))))


;; +==========================================================================+
;; | Overlay test setup
;; +==========================================================================+

(eval-and-compile
  (defun buffer-tests--make-test-name (fn x y)
    (intern (format "buffer-tests--%s-%s-%s" fn x y))))

(defun buffer-tests--unmake-test-name (symbol)
  (let ((name (if (stringp symbol) symbol (symbol-name symbol))))
    (when (string-match "\\`buffer-tests--\\(.*\\)-\\(.*\\)-\\(.*\\)\\'" name)
      (list (match-string 1 name)
            (match-string 2 name)
            (match-string 3 name)))))

(defmacro deftest-make-overlay-1 (id args)
  (declare (indent 1))
  `(ert-deftest ,(buffer-tests--make-test-name 'make-overlay 1 id) ()
     (with-temp-buffer
       (should ,(cons 'make-overlay args)))))

(defmacro deftest-make-overlay-2 (id args condition)
  (declare (indent 1))
  `(ert-deftest ,(buffer-tests--make-test-name 'make-overlay 2 id) ()
     (with-temp-buffer
       (should-error
        ,(cons 'make-overlay args)
        :type ',condition
        :exclude-subtypes t))))

(defmacro deftest-overlay-start/end-1 (id start-end-args start-end-should)
  (declare (indent 1))
  (cl-destructuring-bind (start end sstart send)
      (append start-end-args start-end-should)
    `(ert-deftest ,(buffer-tests--make-test-name 'overlay-start/end 1 id) ()
       (with-temp-buffer
         (insert (make-string 9 ?\n))
         (let ((ov (make-overlay ,start ,end)))
           (should (equal ,sstart (overlay-start ov)))
           (should (equal ,send (overlay-end ov))))))))

(defmacro deftest-overlay-buffer-1 (id arg-expr should-expr)
  (declare (indent 1))
  `(ert-deftest ,(buffer-tests--make-test-name 'overlay-buffer 1 id) ()
     (with-temp-buffer
       (should (equal (overlay-buffer (make-overlay 1 1 ,arg-expr))
                      ,should-expr)))))

(defmacro deftest-overlayp-1 (id arg-expr should-expr)
  (declare (indent 1))
  `(ert-deftest ,(buffer-tests--make-test-name 'overlayp 1 id) ()
     (with-temp-buffer
       (should (equal ,should-expr (overlayp ,arg-expr))))))

(defmacro deftest-next-overlay-change-1 (id pos result &rest ov-tuple)
  `(ert-deftest ,(buffer-tests--make-test-name 'next-overlay-change 1 id) ()
     (let ((tuple (copy-sequence ',ov-tuple)))
       (with-temp-buffer
         (insert (make-string (max 100 (if tuple
                                           (apply #'max
                                                  (mapcar
                                                   (lambda (m) (apply #'max m))
                                                   tuple))
                                         0))
                              ?\n))
         (dolist (tup tuple)
           (make-overlay (car tup) (cadr tup)))
         (should (equal (next-overlay-change ,pos)
                        ,result))))))

(defmacro deftest-previous-overlay-change-1 (id pos result &rest ov-tuple)
  `(ert-deftest ,(buffer-tests--make-test-name 'previous-overlay-change 1 id) ()
     (let ((tuple ',ov-tuple))
       (with-temp-buffer
         (insert (make-string (max 100 (if tuple
                                           (apply #'max
                                                  (mapcar
                                                   (lambda (m) (apply #'max m))
                                                   tuple))
                                         0))
                              ?\n))
         (dolist (tup tuple)
           (make-overlay (car tup) (cadr tup)))
         (should (equal (previous-overlay-change ,pos)
                        ,result))))))

(defmacro deftest-overlays-at-1 (id pos result &rest ov-triple)
  `(ert-deftest ,(buffer-tests--make-test-name 'overlays-at 1 id) ()
     (let ((pos* ,pos))
       (with-temp-buffer
         (insert (make-string 100 ?\s))
         (should-not (memq nil ',result))
         (dolist (v ',ov-triple)
           (cl-destructuring-bind (tag start end)
               v
             (overlay-put (make-overlay start end) 'tag tag)))
         (let ((ovl (overlays-at pos*)))
           (should (equal (length ovl) (length ',result)))
           (dolist (ov ovl)
             (should (memq (overlay-get ov 'tag) ',result))))))))

(defmacro deftest-overlays-in-1 (id beg end result &rest ov-triple)
  `(ert-deftest ,(buffer-tests--make-test-name 'overlays-in 1 id) ()
     (let ((beg* ,beg)
           (end* ,end))
       (with-temp-buffer
         (insert (make-string 100 ?\s))
         (should-not (memq nil ',result))
         (dolist (v ',ov-triple)
           (cl-destructuring-bind (tag start end)
               v
             (overlay-put (make-overlay start end) 'tag tag)))
         (let ((ovl (overlays-in beg* end*)))
           (should (equal (length ovl) (length ',result)))
           (dolist (ov ovl)
             (should (memq (overlay-get ov 'tag) ',result))))))))

(defmacro test-with-overlay-in-buffer (symbol-beg-end-fa-ra &rest body)
  (declare (indent 1))
  (cl-destructuring-bind (symbol beg end &optional fa ra)
      symbol-beg-end-fa-ra
    `(with-temp-buffer
       (insert (make-string (max 1000 (1- ,end)) ?\s))
       (goto-char 1)
       (let ((,symbol (make-overlay ,beg ,end nil ,fa ,ra)))
         ,@body))))

(defmacro deftest-overlays-equal-1 (id result ov1-args ov2-args)
  `(ert-deftest ,(buffer-tests--make-test-name 'overlays-equal 1 id) ()
     (cl-flet ((create-overlay (args)
                 (cl-destructuring-bind (start end &optional fa ra
                                                   &rest properties)
                     args
                   (let ((ov (make-overlay start end nil fa ra)))
                     (while properties
                       (overlay-put ov (pop properties) (pop properties)))
                     ov))))
       (with-temp-buffer
         (insert (make-string 1024 ?\s))
         (should (,(if result 'identity 'not)
                  (equal (create-overlay ',ov1-args)
                         (create-overlay ',ov2-args))))))))


(defun buffer-tests--find-ert-test (name)
  (let ((test (buffer-tests--unmake-test-name name)))
    (or (and test
             (cl-destructuring-bind (fn x y)
                 test
               (let ((regexp (format "deftest-%s-%s +%s" fn x y)))
                 (re-search-forward regexp nil t))))
        (let ((find-function-regexp-alist
               (cl-remove #'buffer-tests--find-ert-test
                          find-function-regexp-alist :key #'cdr)))
          (find-function-do-it name 'ert-deftest
                               #'switch-to-buffer-other-window)))))

(add-to-list 'find-function-regexp-alist
             `(ert-deftest . ,#'buffer-tests--find-ert-test))


;; +==========================================================================+
;; | make-overlay
;; +==========================================================================+

;; Test if making an overlay succeeds.
(deftest-make-overlay-1 A (1 1))
(deftest-make-overlay-1 B (7 26))
(deftest-make-overlay-1 C (29 7))
(deftest-make-overlay-1 D (most-positive-fixnum 1))
(deftest-make-overlay-1 E (most-negative-fixnum 1))
(deftest-make-overlay-1 F (1 most-positive-fixnum))
(deftest-make-overlay-1 G (1 most-negative-fixnum))
(deftest-make-overlay-1 H (1 1 nil t))
(deftest-make-overlay-1 I (1 1 nil nil))
(deftest-make-overlay-1 J (1 1 nil nil nil))
(deftest-make-overlay-1 K (1 1 nil nil t))
(deftest-make-overlay-1 L (1 1 nil t t))
(deftest-make-overlay-1 M (1 1 nil "yes" "yes"))

;; Test if trying to make an overlay signals conditions.
(deftest-make-overlay-2 A ()            wrong-number-of-arguments)
(deftest-make-overlay-2 B (1)           wrong-number-of-arguments)
(deftest-make-overlay-2 C (1 2 3 4 5 6) wrong-number-of-arguments)
(deftest-make-overlay-2 D ("1")         wrong-number-of-arguments)
(deftest-make-overlay-2 E ("1" "2")     wrong-type-argument)
(deftest-make-overlay-2 F (1 2 "b")     wrong-type-argument)
(deftest-make-overlay-2 G (1 2 3.14)    wrong-type-argument)
(deftest-make-overlay-2 H (3.14 3)      wrong-type-argument)
(deftest-make-overlay-2 I (1 [1])       wrong-type-argument)
(deftest-make-overlay-2 J (1 1 (with-temp-buffer
                                 (current-buffer)))
  error)


;; +==========================================================================+
;; | overlay-start/end
;; +==========================================================================+

;; Test if the overlays return proper positions.  point-max of the
;; buffer will equal 10.        ARG RESULT
(deftest-overlay-start/end-1 A (1 1) (1 1))
(deftest-overlay-start/end-1 B (2 7) (2 7))
(deftest-overlay-start/end-1 C (7 2) (2 7))
(deftest-overlay-start/end-1 D (1 10) (1 10))
(deftest-overlay-start/end-1 E (1 11) (1 10))
(deftest-overlay-start/end-1 F (1 most-positive-fixnum) (1 10))
(deftest-overlay-start/end-1 G (most-positive-fixnum 1) (1 10))
(deftest-overlay-start/end-1 H (most-positive-fixnum most-positive-fixnum)
                               (10 10))
(deftest-overlay-start/end-1 I (100 11) (10 10))
(deftest-overlay-start/end-1 J (11 100) (10 10))
(deftest-overlay-start/end-1 K (0 1) (1 1))
(deftest-overlay-start/end-1 L (1 0) (1 1))
(deftest-overlay-start/end-1 M (0 0) (1 1))

(ert-deftest test-overlay-start/end-2 ()
  (should-not (overlay-start (with-temp-buffer (make-overlay 1 1))))
  (should-not (overlay-end (with-temp-buffer (make-overlay 1 1)))))


;; +==========================================================================+
;; | overlay-buffer
;; +==========================================================================+

;; Test if overlay-buffer returns appropriate values.
(deftest-overlay-buffer-1 A (current-buffer) (current-buffer))
(deftest-overlay-buffer-1 B nil (current-buffer))
(ert-deftest test-overlay-buffer-1-C ()
  (should-error (make-overlay
                 1 1 (with-temp-buffer (current-buffer)))))


;; +==========================================================================+
;; | overlayp
;; +==========================================================================+

;; Check the overlay predicate.
(deftest-overlayp-1 A (make-overlay 1 1) t)
(deftest-overlayp-1 B (with-temp-buffer (make-overlay 1 1)) t)
(deftest-overlayp-1 C nil                            nil)
(deftest-overlayp-1 D 'symbol                        nil)
(deftest-overlayp-1 E "string"                       nil)
(deftest-overlayp-1 F 42                             nil)
(deftest-overlayp-1 G [1 2]                          nil)
(deftest-overlayp-1 H (symbol-function 'car)         nil)
(deftest-overlayp-1 I float-pi                       nil)
(deftest-overlayp-1 J (cons 1 2)                     nil)
(deftest-overlayp-1 K (make-hash-table)              nil)
(deftest-overlayp-1 L (symbol-function 'ert-deftest) nil)
(deftest-overlayp-1 M (current-buffer)               nil)
(deftest-overlayp-1 N (selected-window)              nil)
(deftest-overlayp-1 O (selected-frame)               nil)


;; +==========================================================================+
;; | overlay equality
;; +==========================================================================+

(deftest-overlays-equal-1 A t (1 1) (1 1))
(deftest-overlays-equal-1 B t (5 10) (5 10))
(deftest-overlays-equal-1 C nil (5 11) (5 10))
(deftest-overlays-equal-1 D t (10 20 t) (10 20))
(deftest-overlays-equal-1 E t (10 20 nil t) (10 20))
(deftest-overlays-equal-1 F t (10 20 t t) (10 20 nil t))
(deftest-overlays-equal-1 G t (10 20 t t) (10 20 t nil))
(deftest-overlays-equal-1 H t (10 20 nil nil foo 42) (10 20 nil nil foo 42))
(deftest-overlays-equal-1 I nil (10 20 nil nil foo 42) (10 20 nil nil foo 43))


;; +==========================================================================+
;; | overlay-lists
;; +==========================================================================+

;; Check whether overlay-lists returns something sensible.
(ert-deftest test-overlay-lists-1 ()
  (with-temp-buffer
    (should (equal (cons nil nil) (overlay-lists)))
    (dotimes (i 10) (make-overlay 1 i))
    (should (listp (car (overlay-lists))))
    (should (listp (cdr (overlay-lists))))
    (let ((list (append (car (overlay-lists))
                        (cdr (overlay-lists)))))
      (should (= 10 (length list)))
      (should (seq-every-p #'overlayp list)))))


;; +==========================================================================+
;; | overlay-put/get/properties
;; +==========================================================================+

;; Test if overlay-put properties can be retrieved by overlay-get and
;; overlay-properties.
(ert-deftest test-overlay-props-1 ()
  (with-temp-buffer
    (let* ((keys '(:k1 :k2 :k3))
           (values '(1 "v2" v3))
           (ov (make-overlay 1 1))
           (n (length keys)))
      (should (equal (length keys) (length values)))
      (should (null (overlay-properties ov)))
      ;; Insert keys and values.
      (dotimes (i n)
        (should (equal (overlay-put ov (nth i keys) (nth i values))
                       (nth i values))))
      ;; Compare with what overlay-get says.
      (dotimes (i n)
        (should (equal (overlay-get ov (nth i keys))
                       (nth i values))))
      ;; Test if overlay-properties is a superset.
      (dotimes (i n)
        (should (equal (plist-get (overlay-properties ov)
                                  (nth i keys))
                       (nth i values))))
      ;; Check if overlay-properties is a subset.
      (should (= (length (overlay-properties ov)) (* n 2))))))


;; +==========================================================================+
;; | next-overlay-change
;; +==========================================================================+

;; Test if next-overlay-change returns RESULT if called with POS in a
;; buffer with overlays corresponding to OVS and point-max >= 100.
;;                               (POS RESULT &rest OVS)
;; 0 overlays
(deftest-next-overlay-change-1 A (point-min) (point-max))
(deftest-next-overlay-change-1 B (point-max) (point-max))
;; 1 non-empty overlay
(deftest-next-overlay-change-1 C 1 10 (10 20))
(deftest-next-overlay-change-1 D 10 20 (10 20))
(deftest-next-overlay-change-1 E 15 20 (10 20))
(deftest-next-overlay-change-1 F 20 (point-max) (10 20))
(deftest-next-overlay-change-1 G 30 (point-max) (10 20))
;; 1 empty overlay
(deftest-next-overlay-change-1 H 1 10 (10 10))
(deftest-next-overlay-change-1 I 10 (point-max) (10 10))
(deftest-next-overlay-change-1 J 20 (point-max) (10 10))
;; 2 non-empty, non-intersecting
(deftest-next-overlay-change-1 D2 10 20 (20 30) (40 50))
(deftest-next-overlay-change-1 E2 35 40 (20 30) (40 50))
(deftest-next-overlay-change-1 F2 60 (point-max) (20 30) (40 50))
(deftest-next-overlay-change-1 G2 30 40 (20 30) (40 50))
(deftest-next-overlay-change-1 H2 50 (point-max) (20 30) (40 50))
;; 2 non-empty, intersecting
(deftest-next-overlay-change-1 I2 10 20 (20 30) (25 35))
(deftest-next-overlay-change-1 J2 20 25 (20 30) (25 35))
(deftest-next-overlay-change-1 K 23 25 (20 30) (25 35))
(deftest-next-overlay-change-1 L 25 30 (20 30) (25 35))
(deftest-next-overlay-change-1 M 28 30 (20 30) (25 35))
(deftest-next-overlay-change-1 N 30 35 (20 30) (25 35))
(deftest-next-overlay-change-1 O 35 (point-max) (20 30) (25 35))
(deftest-next-overlay-change-1 P 50 (point-max) (20 30) (25 35))
;; 2 non-empty, continuous
(deftest-next-overlay-change-1 Q 10 20 (20 30) (30 40))
(deftest-next-overlay-change-1 R 20 30 (20 30) (30 40))
(deftest-next-overlay-change-1 S 25 30 (20 30) (30 40))
(deftest-next-overlay-change-1 T 30 40 (20 30) (30 40))
(deftest-next-overlay-change-1 U 35 40 (20 30) (30 40))
(deftest-next-overlay-change-1 V 40 (point-max) (20 30) (30 40))
(deftest-next-overlay-change-1 W 50 (point-max) (20 30) (30 40))
;; 1 empty, 1 non-empty, non-in
(deftest-next-overlay-change-1 a 10 20 (20 20) (30 40))
(deftest-next-overlay-change-1 b 20 30 (20 30) (30 40))
(deftest-next-overlay-change-1 c 25 30 (20 30) (30 40))
(deftest-next-overlay-change-1 d 30 40 (20 30) (30 40))
(deftest-next-overlay-change-1 e 35 40 (20 30) (30 40))
(deftest-next-overlay-change-1 f 40 (point-max) (20 30) (30 40))
(deftest-next-overlay-change-1 g 50 (point-max) (20 30) (30 40))
;; 1 empty, 1 non-empty, intersecting at begin
(deftest-next-overlay-change-1 h 10 20 (20 20) (20 30))
(deftest-next-overlay-change-1 i 20 30 (20 20) (20 30))
(deftest-next-overlay-change-1 j 25 30 (20 20) (20 30))
(deftest-next-overlay-change-1 k 30 (point-max) (20 20) (20 30))
(deftest-next-overlay-change-1 l 40 (point-max) (20 20) (20 30))
;; 1 empty, 1 non-empty, intersecting at end
(deftest-next-overlay-change-1 h2 10 20 (30 30) (20 30))
(deftest-next-overlay-change-1 i2 20 30 (30 30) (20 30))
(deftest-next-overlay-change-1 j2 25 30 (30 30) (20 30))
(deftest-next-overlay-change-1 k2 30 (point-max) (20 20) (20 30))
(deftest-next-overlay-change-1 l2 40 (point-max) (20 20) (20 30))
;; 1 empty, 1 non-empty, intersecting in the middle
(deftest-next-overlay-change-1 m 10 20 (25 25) (20 30))
(deftest-next-overlay-change-1 n 20 25 (25 25) (20 30))
(deftest-next-overlay-change-1 o 25 30 (25 25) (20 30))
(deftest-next-overlay-change-1 p 30 (point-max) (25 25) (20 30))
(deftest-next-overlay-change-1 q 40 (point-max) (25 25) (20 30))
;; 2 empty, intersecting
(deftest-next-overlay-change-1 r 10 20 (20 20) (20 20))
(deftest-next-overlay-change-1 s 20 (point-max) (20 20) (20 20))
(deftest-next-overlay-change-1 t 30 (point-max) (20 20) (20 20))
;; 2 empty, non-intersecting
(deftest-next-overlay-change-1 u 10 20 (20 20) (30 30))
(deftest-next-overlay-change-1 v 20 30 (20 20) (30 30))
(deftest-next-overlay-change-1 w 25 30 (20 20) (30 30))
(deftest-next-overlay-change-1 x 30 (point-max) (20 20) (30 30))
(deftest-next-overlay-change-1 y 50 (point-max) (20 20) (30 30))
;; 10 random
(deftest-next-overlay-change-1 aa 1 5
  (58 66) (41 10) (9 67) (28 88) (27 43)
  (24 27) (48 36) (5 90) (61 9))
(deftest-next-overlay-change-1 ab (point-max) (point-max)
  (58 66) (41 10) (9 67) (28 88) (27 43)
  (24 27) (48 36) (5 90) (61 9))
(deftest-next-overlay-change-1 ac 67 88
  (58 66) (41 10) (9 67) (28 88) (27 43)
  (24 27) (48 36) (5 90) (61 9))


;; +==========================================================================+
;; | previous-overlay-change.
;; +==========================================================================+

;; Same for previous-overlay-change.
;; 1 non-empty overlay
(deftest-previous-overlay-change-1 A (point-max) 1)
(deftest-previous-overlay-change-1 B 1 1)
(deftest-previous-overlay-change-1 C 1 1 (10 20))
(deftest-previous-overlay-change-1 D 10 1 (10 20))
(deftest-previous-overlay-change-1 E 15 10 (10 20))
(deftest-previous-overlay-change-1 F 20 10 (10 20))
(deftest-previous-overlay-change-1 G 30 20 (10 20))
;; 1 empty overlay
(deftest-previous-overlay-change-1 H 1 1 (10 10))
(deftest-previous-overlay-change-1 I 10 1 (10 10))
(deftest-previous-overlay-change-1 J 20 10 (10 10))
;; 2 non-empty, non-intersecting
(deftest-previous-overlay-change-1 D2 10 1 (20 30) (40 50))
(deftest-previous-overlay-change-1 E2 35 30 (20 30) (40 50))
(deftest-previous-overlay-change-1 F2 60 50 (20 30) (40 50))
(deftest-previous-overlay-change-1 G2 30 20 (20 30) (40 50))
(deftest-previous-overlay-change-1 H2 50 40 (20 30) (40 50))
;; 2 non-empty, intersecting
(deftest-previous-overlay-change-1 I2 10 1 (20 30) (25 35))
(deftest-previous-overlay-change-1 J2 20 1 (20 30) (25 35))
(deftest-previous-overlay-change-1 K 23 20 (20 30) (25 35))
(deftest-previous-overlay-change-1 L 25 20 (20 30) (25 35))
(deftest-previous-overlay-change-1 M 28 25 (20 30) (25 35))
(deftest-previous-overlay-change-1 N 30 25 (20 30) (25 35))
(deftest-previous-overlay-change-1 O 35 30 (20 30) (25 35))
(deftest-previous-overlay-change-1 P 50 35 (20 30) (25 35))
;; 2 non-empty, continuous
(deftest-previous-overlay-change-1 Q 10 1 (20 30) (30 40))
(deftest-previous-overlay-change-1 R 20 1 (20 30) (30 40))
(deftest-previous-overlay-change-1 S 25 20 (20 30) (30 40))
(deftest-previous-overlay-change-1 T 30 20 (20 30) (30 40))
(deftest-previous-overlay-change-1 U 35 30 (20 30) (30 40))
(deftest-previous-overlay-change-1 V 40 30 (20 30) (30 40))
(deftest-previous-overlay-change-1 W 50 40 (20 30) (30 40))
;; 1 empty, 1 non-empty, non-intersecting
(deftest-previous-overlay-change-1 a 10 1 (20 20) (30 40))
(deftest-previous-overlay-change-1 b 20 1 (20 30) (30 40))
(deftest-previous-overlay-change-1 c 25 20 (20 30) (30 40))
(deftest-previous-overlay-change-1 d 30 20 (20 30) (30 40))
(deftest-previous-overlay-change-1 e 35 30 (20 30) (30 40))
(deftest-previous-overlay-change-1 f 40 30 (20 30) (30 40))
(deftest-previous-overlay-change-1 g 50 40 (20 30) (30 40))
;; 1 empty, 1 non-empty, intersecting at begin
(deftest-previous-overlay-change-1 h 10 1 (20 20) (20 30))
(deftest-previous-overlay-change-1 i 20 1 (20 20) (20 30))
(deftest-previous-overlay-change-1 j 25 20 (20 20) (20 30))
(deftest-previous-overlay-change-1 k 30 20 (20 20) (20 30))
(deftest-previous-overlay-change-1 l 40 30 (20 20) (20 30))
;; 1 empty, 1 non-empty, intersecting at end
(deftest-previous-overlay-change-1 m 10 1 (30 30) (20 30))
(deftest-previous-overlay-change-1 n 20 1 (30 30) (20 30))
(deftest-previous-overlay-change-1 o 25 20 (30 30) (20 30))
(deftest-previous-overlay-change-1 p 30 20 (20 20) (20 30))
(deftest-previous-overlay-change-1 q 40 30 (20 20) (20 30))
;; 1 empty, 1 non-empty, intersecting in the middle
(deftest-previous-overlay-change-1 r 10 1 (25 25) (20 30))
(deftest-previous-overlay-change-1 s 20 1 (25 25) (20 30))
(deftest-previous-overlay-change-1 t 25 20 (25 25) (20 30))
(deftest-previous-overlay-change-1 u 30 25 (25 25) (20 30))
(deftest-previous-overlay-change-1 v 40 30 (25 25) (20 30))
;; 2 empty, intersecting
(deftest-previous-overlay-change-1 w 10 1 (20 20) (20 20))
(deftest-previous-overlay-change-1 x 20 1 (20 20) (20 20))
(deftest-previous-overlay-change-1 y 30 20 (20 20) (20 20))
;; 2 empty, non-intersecting
(deftest-previous-overlay-change-1 z 10 1 (20 20) (30 30))
(deftest-previous-overlay-change-1 aa 20 1 (20 20) (30 30))
(deftest-previous-overlay-change-1 ab 25 20 (20 20) (30 30))
(deftest-previous-overlay-change-1 ac 30 20 (20 20) (30 30))
(deftest-previous-overlay-change-1 ad 50 30 (20 20) (30 30))
;; 10 random
(deftest-previous-overlay-change-1 ae 100 90
  (58 66) (41 10) (9 67) (28 88) (27 43)
  (24 27) (48 36) (5 90) (61 9))
(deftest-previous-overlay-change-1 af (point-min) (point-min)
  (58 66) (41 10) (9 67) (28 88) (27 43)
  (24 27) (48 36) (5 90) (61 9))
(deftest-previous-overlay-change-1 ag 29 28
  (58 66) (41 10) (9 67) (28 88) (27 43)
  (24 27) (48 36) (5 90) (61 9))


;; +==========================================================================+
;; | overlays-at
;; +==========================================================================+


;; Test whether overlay-at returns RESULT at POS after overlays OVL were
;; created in a buffer.         POS RES OVL
(deftest-overlays-at-1 A 1 ())
;; 1 overlay
(deftest-overlays-at-1 B 10 (a) (a 10 20))
(deftest-overlays-at-1 C 15 (a) (a 10 20))
(deftest-overlays-at-1 D 19 (a) (a 10 20))
(deftest-overlays-at-1 E 20 ()  (a 10 20))
(deftest-overlays-at-1 F 1 () (a 10 20))

;; 2 non-empty overlays non-intersecting
(deftest-overlays-at-1 G 1 () (a 10 20) (b 30 40))
(deftest-overlays-at-1 H 10 (a) (a 10 20) (b 30 40))
(deftest-overlays-at-1 I 15 (a) (a 10 20) (b 30 40))
(deftest-overlays-at-1 K 20 () (a 10 20) (b 30 40))
(deftest-overlays-at-1 L 25 () (a 10 20) (b 30 40))
(deftest-overlays-at-1 M 30 (b) (a 10 20) (b 30 40))
(deftest-overlays-at-1 N 35 (b) (a 10 20) (b 30 40))
(deftest-overlays-at-1 O 40 () (a 10 20) (b 30 40))
(deftest-overlays-at-1 P 50 () (a 10 20) (b 30 40))

;; 2 non-empty overlays intersecting
(deftest-overlays-at-1 G2 1 () (a 10 30) (b 20 40))
(deftest-overlays-at-1 H2 10 (a) (a 10 30) (b 20 40))
(deftest-overlays-at-1 I2 15 (a) (a 10 30) (b 20 40))
(deftest-overlays-at-1 K2 20 (a b) (a 10 30) (b 20 40))
(deftest-overlays-at-1 L2 25 (a b) (a 10 30) (b 20 40))
(deftest-overlays-at-1 M2 30 (b) (a 10 30) (b 20 40))
(deftest-overlays-at-1 N2 35 (b) (a 10 30) (b 20 40))
(deftest-overlays-at-1 O2 40 () (a 10 30) (b 20 40))
(deftest-overlays-at-1 P2 50 () (a 10 30) (b 20 40))

;; 2 non-empty overlays continuous
(deftest-overlays-at-1 G3 1 () (a 10 20) (b 20 30))
(deftest-overlays-at-1 H3 10 (a) (a 10 20) (b 20 30))
(deftest-overlays-at-1 I3 15 (a) (a 10 20) (b 20 30))
(deftest-overlays-at-1 K3 20 (b) (a 10 20) (b 20 30))
(deftest-overlays-at-1 L3 25 (b) (a 10 20) (b 20 30))
(deftest-overlays-at-1 M3 30 () (a 10 20) (b 20 30))

;; overlays-at never returns empty overlays.
(deftest-overlays-at-1 N3 1 (a) (a 1 60) (c 1 1) (b 30 30) (d 50 50))
(deftest-overlays-at-1 O3 20 (a) (a 1 60) (c 1 1) (b 30 30) (d 50 50))
(deftest-overlays-at-1 P3 30 (a) (a 1 60) (c 1 1) (b 30 30) (d 50 50))
(deftest-overlays-at-1 Q 40 (a) (a 1 60) (c 1 1) (b 30 30) (d 50 50))
(deftest-overlays-at-1 R 50 (a) (a 1 60) (c 1 1) (b 30 30) (d 50 50))
(deftest-overlays-at-1 S 60 () (a 1 60) (c 1 1) (b 30 30) (d 50 50))

;; behavior at point-min and point-max
(ert-deftest test-overlays-at-2 ()
  (cl-macrolet ((should-length (n list)
                               `(should (= ,n (length ,list)))))
    (with-temp-buffer
      (insert (make-string 100 ?\s))
      (make-overlay 1 (point-max))
      (make-overlay 10 10)
      (make-overlay 20 20)
      (make-overlay (point-max) (point-max))
      (should-length 1 (overlays-at 1))
      (should-length 1 (overlays-at 10))
      (should-length 1 (overlays-at 20))
      (should-length 0 (overlays-at (point-max)))
      (narrow-to-region 10 20)
      (should-length 1 (overlays-at (point-min)))
      (should-length 1 (overlays-at 15))
      (should-length 1 (overlays-at (point-max))))))


;; +==========================================================================+
;; | overlay-in
;; +==========================================================================+


;; Test whether overlays-in returns RES in BEG,END after overlays OVL were
;; created in a buffer.

(deftest-overlays-in-1 A 1 (point-max) ());;POS RES OVL
;; 1 overlay
(deftest-overlays-in-1 B 1 10 () (a 10 20))
(deftest-overlays-in-1 C 5 10 () (a 10 20))
(deftest-overlays-in-1 D 5 15 (a) (a 10 20))
(deftest-overlays-in-1 E 10 15 (a)  (a 10 20))
(deftest-overlays-in-1 F 10 20 (a) (a 10 20))
(deftest-overlays-in-1 G 15 20 (a) (a 10 20))
(deftest-overlays-in-1 H 15 25 (a) (a 10 20))
(deftest-overlays-in-1 I 20 25 () (a 10 20))
(deftest-overlays-in-1 J 30 50 () (a 10 20))

;; 2 non-empty overlays non-intersecting
(deftest-overlays-in-1 K 1 5 () (a 10 20) (b 30 40))
(deftest-overlays-in-1 L 5 10 () (a 10 20) (b 30 40))
(deftest-overlays-in-1 M 5 15 (a) (a 10 20) (b 30 40))
(deftest-overlays-in-1 N 10 15 (a) (a 10 20) (b 30 40))
(deftest-overlays-in-1 O 15 20 (a) (a 10 20) (b 30 40))
(deftest-overlays-in-1 P 15 25 (a) (a 10 20) (b 30 40))
(deftest-overlays-in-1 Q 20 25 () (a 10 20) (b 30 40))
(deftest-overlays-in-1 R 20 30 () (a 10 20) (b 30 40))
(deftest-overlays-in-1 S 25 30 () (a 10 20) (b 30 40))
(deftest-overlays-in-1 T 25 35 (b) (a 10 20) (b 30 40))
(deftest-overlays-in-1 U 30 35 (b) (a 10 20) (b 30 40))
(deftest-overlays-in-1 V 40 50  () (a 10 20) (b 30 40))
(deftest-overlays-in-1 W 50 60  () (a 10 20) (b 30 40))
(deftest-overlays-in-1 X 1 50  (a b) (a 10 20) (b 30 40))
(deftest-overlays-in-1 Y 10 40  (a b) (a 10 20) (b 30 40))
(deftest-overlays-in-1 Z 10 41  (a b) (a 10 20) (b 30 40))

;; 2 non-empty overlays intersecting
(deftest-overlays-in-1 a 1 5 () (a 10 30) (b 20 40))
(deftest-overlays-in-1 b 5 10 () (a 10 30) (b 20 40))
(deftest-overlays-in-1 c 5 15 (a) (a 10 30) (b 20 40))
(deftest-overlays-in-1 d 10 15 (a) (a 10 30) (b 20 40))
(deftest-overlays-in-1 e 10 20 (a) (a 10 30) (b 20 40))
(deftest-overlays-in-1 f 15 20 (a) (a 10 30) (b 20 40))
(deftest-overlays-in-1 g 20 30 (a b) (a 10 30) (b 20 40))
(deftest-overlays-in-1 h 20 40 (a b) (a 10 30) (b 20 40))
(deftest-overlays-in-1 i 25 30 (a b) (a 10 30) (b 20 40))
(deftest-overlays-in-1 j 30 30 (b) (a 10 30) (b 20 40))
(deftest-overlays-in-1 k 30 35 (b) (a 10 30) (b 20 40))
(deftest-overlays-in-1 l 35 40 (b) (a 10 30) (b 20 40))
(deftest-overlays-in-1 m 40 45 () (a 10 30) (b 20 40))
(deftest-overlays-in-1 n 41 45 () (a 10 30) (b 20 40))
(deftest-overlays-in-1 o 50 60 () (a 10 30) (b 20 40))

;; 2 non-empty overlays continuous
(deftest-overlays-in-1 p 1 5 () (a 10 20) (b 20 30))
(deftest-overlays-in-1 q 5 10 () (a 10 20) (b 20 30))
(deftest-overlays-in-1 r 15 20 (a) (a 10 20) (b 20 30))
(deftest-overlays-in-1 s 15 25 (a b) (a 10 20) (b 20 30))
(deftest-overlays-in-1 t 20 25 (b) (a 10 20) (b 20 30))
(deftest-overlays-in-1 u 25 30 (b) (a 10 20) (b 20 30))
(deftest-overlays-in-1 v 29 35 (b) (a 10 20) (b 20 30))
(deftest-overlays-in-1 w 30 35 () (a 10 20) (b 20 30))
(deftest-overlays-in-1 x 35 50 () (a 10 20) (b 20 30))
(deftest-overlays-in-1 y 1 50 (a b) (a 10 20) (b 20 30))
(deftest-overlays-in-1 z 15 50 (a b) (a 10 20) (b 20 30))
(deftest-overlays-in-1 aa 1 25 (a b) (a 10 20) (b 20 30))

;; 1 empty overlay
(deftest-overlays-in-1 ab 1 10 () (a 10 10))
(deftest-overlays-in-1 ac 10 10 (a) (a 10 10))
(deftest-overlays-in-1 ad 9 10 () (a 10 10))
(deftest-overlays-in-1 ae 9 11 (a) (a 10 10))
(deftest-overlays-in-1 af 10 11 (a) (a 10 10))


;; behavior at point-max
(ert-deftest test-overlays-in-2 ()
  (cl-macrolet ((should-length (n list)
                               `(should (= ,n (length ,list)))))
    (with-temp-buffer
      (insert (make-string 100 ?\s))
      (make-overlay (point-max) (point-max))
      (make-overlay 50 50)
      (should-length 1 (overlays-in 50 50))
      (should-length 2 (overlays-in 1 (point-max)))
      (should-length 1 (overlays-in (point-max) (point-max)))
      (narrow-to-region 1 50)
      (should-length 1 (overlays-in 1 (point-max)))
      (should-length 1 (overlays-in (point-max) (point-max))))))


;; +==========================================================================+
;; | overlay-recenter
;; +==========================================================================+

;; This function is a noop in the overlay tree branch.
(ert-deftest test-overlay-recenter ()
  (with-temp-buffer
    (should-not (overlay-recenter 1))
    (insert (make-string 100 ?\s))
    (dotimes (i 10)
      (make-overlay i (1+ i))
      (should-not (overlay-recenter i)))))


;; +==========================================================================+
;; | move-overlay
;; +==========================================================================+

;; buffer nil with live overlay
(ert-deftest test-move-overlay-1 ()
  (test-with-overlay-in-buffer (ov 1 100)
    (move-overlay ov 50 60)
    (should (= 50 (overlay-start ov)))
    (should (= 60 (overlay-end ov)))
    (should (eq (current-buffer) (overlay-buffer ov)))))

;; buffer nil, dead overlay
(ert-deftest test-move-overlay-2 ()
  (with-temp-buffer
    (let ((ov (test-with-overlay-in-buffer (ov 1 100) ov)))
      (insert (make-string 100 ?\s))
      (move-overlay ov 50 60)
      (should (= 50 (overlay-start ov)))
      (should (= 60 (overlay-end ov)))
      (should (eq (current-buffer) (overlay-buffer ov))))))

;; buffer non-nil, live overlay
(ert-deftest test-move-overlay-3 ()
  (test-with-overlay-in-buffer (ov 10 100)
    (with-temp-buffer
      (move-overlay ov 1 1 (current-buffer))
      (should (= 1 (overlay-start ov)))
      (should (= 1 (overlay-end ov)))
      (should (eq (current-buffer) (overlay-buffer ov))))
    (should-not (overlay-start ov))
    (should-not (overlay-end ov))
    (should-not (overlay-buffer ov))))

;; buffer non-nil, dead overlay
(ert-deftest test-move-overlay-4 ()
  (let ((ov (test-with-overlay-in-buffer (ov 1 1) ov)))
    (with-temp-buffer
      (move-overlay ov 1 1 (current-buffer))
      (should (= 1 (overlay-start ov)))
      (should (= 1 (overlay-end ov)))
      (should (eq (current-buffer) (overlay-buffer ov))))
    (should-not (overlay-start ov))
    (should-not (overlay-end ov))
    (should-not (overlay-buffer ov))))

;; +==========================================================================+
;; | delete-(all-)overlay
;; +==========================================================================+

;; delete live overlay
(ert-deftest test-delete-overlay-1 ()
  (test-with-overlay-in-buffer (ov 10 100)
    (should (buffer-live-p (overlay-buffer ov)))
    (delete-overlay ov)
    (should-not (overlay-start ov))
    (should-not (overlay-end ov))
    (should-not (overlay-buffer ov))))

;; delete dead overlay
(ert-deftest test-delete-overlay-2 ()
  (let ((ov (test-with-overlay-in-buffer (ov 10 100) ov)))
    (should-not (overlay-start ov))
    (should-not (overlay-end ov))
    (should-not (overlay-buffer ov))
    (should-not (delete-overlay ov))
    (should-not (overlay-start ov))
    (should-not (overlay-end ov))
    (should-not (overlay-buffer ov))))

(ert-deftest test-delete-all-overlay-1 ()
  (with-temp-buffer
    (should-not (delete-all-overlays))
    (should-not (delete-all-overlays (current-buffer)))
    (insert (make-string 100 ?\s))
    (dotimes (i 10) (make-overlay i (1+ i)))
    (should-not (delete-all-overlays (current-buffer)))
    (should-not (delete-all-overlays))))


;; +==========================================================================+
;; | get-char-property(-and-overlay)
;; +==========================================================================+

;; FIXME: TBD


;; +==========================================================================+
;; | Moving by insertions
;; +==========================================================================+

(defmacro deftest-moving-insert-1 (id beg-end insert sbeg-send fa ra)
  (cl-destructuring-bind (beg end ipos ilen sbeg send fa ra)
      (append beg-end insert sbeg-send (list fa ra) nil)
    `(ert-deftest ,(buffer-tests--make-test-name 'moving-insert 1 id) ()
       (test-with-overlay-in-buffer (ov ,beg ,end ,fa ,ra)
         (should (= ,beg (overlay-start ov)))
         (should (= ,end (overlay-end ov)))
         (goto-char ,ipos)
         (insert (make-string ,ilen ?x))
         (should (= ,sbeg (overlay-start ov)))
         (should (= ,send (overlay-end ov)))))))

;; non-empty, no fa, no ra
;; --------------------  OV      INS    RESULT
(deftest-moving-insert-1 A (10 20) (15 3) (10 23) nil nil)
(deftest-moving-insert-1 B (10 20) (20 4) (10 20) nil nil)
(deftest-moving-insert-1 C (10 20) (5 5) (15 25) nil nil)
(deftest-moving-insert-1 D (10 20) (10 3) (10 23) nil nil)
(deftest-moving-insert-1 E (10 20) (20 4) (10 20) nil nil)

;; non-empty no fa, ra
(deftest-moving-insert-1 F (10 20) (15 3) (10 23) nil t)
(deftest-moving-insert-1 G (10 20) (20 4) (10 24) nil t)
(deftest-moving-insert-1 H (10 20) (5 5) (15 25) nil t)
(deftest-moving-insert-1 I (10 20) (10 3) (10 23) nil t)
(deftest-moving-insert-1 J (10 20) (20 4) (10 24) nil t)

;; non-empty, fa, no r
(deftest-moving-insert-1 K (10 20) (15 3) (10 23) t nil)
(deftest-moving-insert-1 L (10 20) (20 4) (10 20) t nil)
(deftest-moving-insert-1 M (10 20) (5 5) (15 25) t nil)
(deftest-moving-insert-1 N (10 20) (10 3) (13 23) t nil)
(deftest-moving-insert-1 O (10 20) (20 4) (10 20) t nil)

;; This used to fail.
(ert-deftest test-moving-insert-2-a ()
  (with-temp-buffer
    (insert (make-string 1 ?.))
    (let ((ov (make-overlay 1 1 nil t nil)))
      (insert "()")
      (should (= 1 (overlay-end ov))))))

;; non-empty, fa, ra
(deftest-moving-insert-1 P (10 20) (15 3) (10 23) t t)
(deftest-moving-insert-1 Q (10 20) (20 4) (10 24) t t)
(deftest-moving-insert-1 R (10 20) (5 5) (15 25) t t)
(deftest-moving-insert-1 S (10 20) (10 3) (13 23) t t)
(deftest-moving-insert-1 T (10 20) (20 4) (10 24) t t)

;; empty, no fa, no ra
(deftest-moving-insert-1 U (15 15) (20 4) (15 15) nil nil)
(deftest-moving-insert-1 V (15 15) (5 5) (20 20) nil nil)
(deftest-moving-insert-1 W (15 15) (15 3) (15 15) nil nil)

;; empty no fa, ra
(deftest-moving-insert-1 X (15 15) (20 4) (15 15) nil t)
(deftest-moving-insert-1 Y (15 15) (5 5) (20 20) nil t)
(deftest-moving-insert-1 Z (15 15) (15 3) (15 18) nil t)

;; empty, fa, no ra
(deftest-moving-insert-1 a (15 15) (20 4) (15 15) t nil)
(deftest-moving-insert-1 b (15 15) (5 5) (20 20) t nil)
(deftest-moving-insert-1 c (15 15) (15 3) (15 15) t nil)

;; empty, fa, ra
(deftest-moving-insert-1 d (15 15) (20 4) (15 15) t t)
(deftest-moving-insert-1 e (15 15) (5 5) (20 20) t t)
(deftest-moving-insert-1 f (15 15) (15 3) (18 18) t t)

;; Try to trigger a pathological case where the tree could become
;; unordered due to an insert operation.

(ert-deftest test-moving-insert-2 ()
  (with-temp-buffer
    (insert (make-string 1000 ?x))
    (let ((root (make-overlay 50 75 nil    nil             'rear-advance))
          (left (make-overlay 25 50 nil    'front-advance  'rear-advance))
          (right (make-overlay 75 100 nil  nil             nil)))
      ;;     [50] <--- start
      ;;    /    \
      ;; (25)    (75)
      (delete-region 25 75)
      ;;     [25]
      ;;    /    \
      ;; (25)    (25)
      (should (= 25 (overlay-start root)))
      (should (= 25 (overlay-end root)))
      (should (= 25 (overlay-start left)))
      (should (= 25 (overlay-end left)))
      (should (= 25 (overlay-start right)))
      (should (= 50 (overlay-end right)))
      ;; Inserting at start should make left advance while right and
      ;; root stay, thus we would have left > right .
      (goto-char 25)
      (insert (make-string 25 ?x))
      ;;     [25]
      ;;    /    \
      ;; (50)    (25)
      (should (= 25 (overlay-start root)))
      (should (= 50 (overlay-end root)))
      (should (= 50 (overlay-start left)))
      (should (= 50 (overlay-end left)))
      (should (= 25 (overlay-start right)))
      (should (= 75 (overlay-end right)))
      ;; Try to detect the error, by removing left.  The should fail
      ;; an eassert, since it won't be found by a regular tree
      ;; traversal - in theory.
      (delete-overlay left)
      (should (= 2 (length (overlays-in 1 (point-max))))))))



;; +==========================================================================+
;; | Moving by deletions
;; +==========================================================================+

(defmacro deftest-moving-delete-1 (id beg-end delete sbeg-send fa ra)
  (cl-destructuring-bind (beg end dpos dlen sbeg send fa ra)
      (append beg-end delete sbeg-send (list fa ra) nil)
    `(ert-deftest ,(buffer-tests--make-test-name 'moving-delete 1 id) ()
       (test-with-overlay-in-buffer (ov ,beg ,end ,fa ,ra)
         (should (= ,beg (overlay-start ov)))
         (should (= ,end (overlay-end ov)))
         (delete-region ,dpos (+ ,dpos ,dlen))
         (should (= ,sbeg (overlay-start ov)))
         (should (= ,send (overlay-end ov)))))))

;; non-empty, no fa, no ra
;; --------------------  OV      DEL    RESULT
(deftest-moving-delete-1 A (10 20) (15 3) (10 17) nil nil)
(deftest-moving-delete-1 B (10 20) (20 4) (10 20) nil nil)
(deftest-moving-delete-1 C (10 20) (5 5) (5 15) nil nil)
(deftest-moving-delete-1 D (10 20) (10 3) (10 17) nil nil)
(deftest-moving-delete-1 E (10 20) (20 4) (10 20) nil nil)

;; non-empty no fa, ra
(deftest-moving-delete-1 F (10 20) (15 3) (10 17) nil t)
(deftest-moving-delete-1 G (10 20) (20 4) (10 20) nil t)
(deftest-moving-delete-1 H (10 20) (5 5) (5 15) nil t)
(deftest-moving-delete-1 I (10 20) (10 3) (10 17) nil t)
(deftest-moving-delete-1 J (10 20) (20 4) (10 20) nil t)

;; non-empty, fa, no ra
(deftest-moving-delete-1 K (10 20) (15 3) (10 17) t nil)
(deftest-moving-delete-1 L (10 20) (20 4) (10 20) t nil)
(deftest-moving-delete-1 M (10 20) (5 5) (5 15) t nil)
(deftest-moving-delete-1 N (10 20) (10 3) (10 17) t nil)
(deftest-moving-delete-1 O (10 20) (20 4) (10 20) t nil)

;; non-empty, fa, ra
(deftest-moving-delete-1 P (10 20) (15 3) (10 17) t t)
(deftest-moving-delete-1 Q (10 20) (20 4) (10 20) t t)
(deftest-moving-delete-1 R (10 20) (5 5) (5 15) t t)
(deftest-moving-delete-1 S (10 20) (10 3) (10 17) t t)
(deftest-moving-delete-1 T (10 20) (20 4) (10 20) t t)

;; empty, no fa, no ra
(deftest-moving-delete-1 U (15 15) (20 4) (15 15) nil nil)
(deftest-moving-delete-1 V (15 15) (5 5) (10 10) nil nil)
(deftest-moving-delete-1 W (15 15) (15 3) (15 15) nil nil)

;; empty no fa, ra
(deftest-moving-delete-1 X (15 15) (20 4) (15 15) nil t)
(deftest-moving-delete-1 Y (15 15) (5 5) (10 10) nil t)
(deftest-moving-delete-1 Z (15 15) (15 3) (15 15) nil t)

;; empty, fa, no ra
(deftest-moving-delete-1 a (15 15) (20 4) (15 15) t nil)
(deftest-moving-delete-1 b (15 15) (5 5) (10 10) t nil)
(deftest-moving-delete-1 c (15 15) (15 3) (15 15) t nil)

;; empty, fa, ra
(deftest-moving-delete-1 d (15 15) (20 4) (15 15) t t)
(deftest-moving-delete-1 e (15 15) (5 5) (10 10) t t)
(deftest-moving-delete-1 f (15 15) (15 3) (15 15) t t)


;; +==========================================================================+
;; | make-indirect-buffer
;; +==========================================================================+

;; Check if overlays are cloned/separate from indirect buffer.
(ert-deftest test-make-indirect-buffer-1 ()
  (with-temp-buffer
    (dotimes (_ 10) (make-overlay 1 1))
    (let (indirect clone)
      (unwind-protect
          (progn
            (setq indirect (make-indirect-buffer
                            (current-buffer) "indirect"))
            (with-current-buffer indirect
              (should-not (overlays-in (point-min) (point-max)))
              (dotimes (_ 20) (make-overlay 1 1))
              (should (= 20 (length (overlays-in (point-min) (point-max)))))
              (delete-all-overlays)
              (should-not (overlays-in (point-min) (point-max))))
            (should (= 10 (length (overlays-in (point-min) (point-max)))))
            (setq clone (make-indirect-buffer
                         (current-buffer) "clone" 'clone))
            (with-current-buffer clone
              (should (= 10 (length (overlays-in (point-min) (point-max)))))
              (dotimes (_ 30) (make-overlay 1 1))
              (should (= 40 (length (overlays-in (point-min) (point-max))))))
            ;; back in temp buffer
            (should (= 10 (length (overlays-in (point-min) (point-max)))))
            (with-current-buffer clone
              (mapc #'delete-overlay
                    (seq-take (overlays-in (point-min) (point-max)) 10))
              (should (= 30 (length (overlays-in (point-min) (point-max))))))
            (should (= 10 (length (overlays-in (point-min) (point-max)))))
            (delete-all-overlays)
            (with-current-buffer clone
              (should (= 30 (length (overlays-in (point-min) (point-max)))))))
        (when (buffer-live-p clone)
          (kill-buffer clone))
        (when (buffer-live-p indirect)
          (kill-buffer indirect))))))



;; +==========================================================================+
;; | buffer-swap-text
;; +==========================================================================+

(defmacro buffer-tests--with-temp-buffers (vars &rest body)
  (declare (indent 1) (debug (sexp &rest form)))
  (if (null vars)
      `(progn ,@body)
    `(with-temp-buffer
       (let ((,(car vars) (current-buffer)))
         (buffer-tests--with-temp-buffers ,(cdr vars) ,@body)))))

;; basic
(ert-deftest test-buffer-swap-text-1 ()
  (buffer-tests--with-temp-buffers (buffer other)
    (with-current-buffer buffer
      (let ((ov (make-overlay 1 1)))
        (buffer-swap-text other)
        (should-not (overlays-in 1 1))
        (with-current-buffer other
          (should (overlays-in 1 1))
          (should (eq ov (car (overlays-in 1 1)))))))))

;; properties
(ert-deftest test-buffer-swap-text-2 ()
  (buffer-tests--with-temp-buffers (buffer other)
    (with-current-buffer other
      (overlay-put (make-overlay 1 1) 'buffer 'other))
    (with-current-buffer buffer
      (overlay-put (make-overlay 1 1) 'buffer 'buffer)
      (buffer-swap-text other)
      (should (= 1 (length (overlays-in 1 1))))
      (should (eq (overlay-get (car (overlays-in 1 1)) 'buffer) 'other)))
    (with-current-buffer other
      (should (= 1 (length (overlays-in 1 1))))
      (should (eq (overlay-get (car (overlays-in 1 1)) 'buffer) 'buffer)))))


;; +==========================================================================+
;; | priorities
;; +==========================================================================+

(ert-deftest test-overlay-priorities-1 ()
  (with-temp-buffer
    (insert " ")
    (dotimes (i 10)
      (let ((ov (make-overlay 1 2)))
        (overlay-put ov 'priority i)
        (overlay-put ov 'value i)))
    (should (eq 9 (get-char-property 1 'value)))))

(ert-deftest test-overlay-priorities-2 ()
  (with-temp-buffer
    (insert " ")
    (dotimes (j 10)
      (let* ((i (- 9 j))
             (ov (make-overlay 1 2)))
        (overlay-put ov 'priority i)
        (overlay-put ov 'value i)))
    (should (eq 9 (get-char-property 1 'value)))))


;; +==========================================================================+
;; | Other
;; +==========================================================================+

(defun test-overlay-regions ()
  (sort (mapcar (lambda (ov)
                  (cons (overlay-start ov)
                        (overlay-end ov)))
                (overlays-in (point-min)
                             (point-max)))
        (lambda (o1 o2)
          (or (< (car o1) (car o2))
              (and (= (car o1) (car o2))
                   (< (cdr o1) (cdr o2)))))))

;; This test used to fail.
(ert-deftest overlay-complex-delete-with-offset ()
  (with-temp-buffer
    (let (todelete)
      (insert (make-string 1000 ?\s))
      (make-overlay 1 2 nil t nil)
      (make-overlay 2 3 nil t nil)
      (make-overlay 3 4 nil t nil)
      (make-overlay 4 5 nil t nil)
      (setq todelete (make-overlay 280 287 nil t nil))
      (make-overlay 265 275 nil t nil)
      (make-overlay 329 386 nil t nil)
      (make-overlay 386 390 nil t nil)
      (goto-char 50)
      (delete-char 50)
      (goto-char 1)
      (delete-char 2)
      (delete-overlay todelete)
      (should (equal (test-overlay-regions)
                     '((1 . 1) (1 . 1) (1 . 2) (2 . 3) (213 . 223) (277 . 334) (334 . 338)))))))

;; This test used to fail.
(ert-deftest overlay-complex-insert-1 ()
  (with-temp-buffer
    (insert "          ")
    (make-overlay 8 11 nil nil t)
    (make-overlay 2 7 nil nil nil)
    (make-overlay 2 4 nil t nil)
    (goto-char 1)
    (insert "     ")
    (should (equal (test-overlay-regions)
                   '((7 . 9)
                     (7 . 12)
                     (13 . 16))))))

;; This test used to fail.
(ert-deftest overlay-complex-insert-2 ()
  (with-temp-buffer
    (insert (make-string 100 ?\s))
    (make-overlay 77 7 nil nil t)
    (make-overlay 21 53 nil t t)
    (make-overlay 84 14 nil nil nil)
    (make-overlay 38 69 nil t nil)
    (make-overlay 93 15 nil nil t)
    (make-overlay 73 48 nil t t)
    (make-overlay 96 51 nil t t)
    (make-overlay 6 43 nil t t)
    (make-overlay 15 100 nil t t)
    (make-overlay 22 17 nil nil nil)
    (make-overlay 72 45 nil t nil)
    (make-overlay 2 74 nil nil t)
    (make-overlay 15 29 nil t t)
    (make-overlay 17 34 nil t t)
    (make-overlay 101 66 nil t nil)
    (make-overlay 94 24 nil nil nil)
    (goto-char 78)
    (insert "           ")
    (narrow-to-region 47 19)
    (goto-char 46)
    (widen)
    (narrow-to-region 13 3)
    (goto-char 9)
    (delete-char 0)
    (goto-char 11)
    (insert "           ")
    (goto-char 3)
    (insert "          ")
    (goto-char 8)
    (insert "       ")
    (goto-char 26)
    (insert "  ")
    (goto-char 14)
    (widen)
    (narrow-to-region 71 35)
    (should
     (equal (test-overlay-regions)
            '((2 . 104)
              (23 . 73)
              (24 . 107)
              (44 . 125)
              (45 . 59)
              (45 . 134)
              (45 . 141)
              (47 . 52)
              (47 . 64)
              (51 . 83)
              (54 . 135)
              (68 . 99))))))

(ert-deftest test-overlay-multibyte-transition-1 ()
  (with-temp-buffer
    (set-buffer-multibyte t)
    (insert "ääää")
    ;; aeaeaeae
    ;; 1 2 3 4 5
    ;; 123456789
    (let ((nonempty-bob (make-overlay 1 2))
          (empty-bob    (make-overlay 1 1))
          (empty        (make-overlay 2 2))
          (nonempty     (make-overlay 2 4))
          (nonempty-eob (make-overlay 4 5))
          (empty-eob    (make-overlay 5 5)))
      (set-buffer-multibyte nil)
      (cl-macrolet
          ((ovshould (ov begin end)
             `(should (equal (list (overlay-start ,ov) (overlay-end ,ov))
                             (list ,begin ,end)))))
        (ovshould nonempty-bob 1 3)
        (ovshould empty-bob    1 1)
        (ovshould empty        3 3)
        (ovshould nonempty     3 7)
        (ovshould nonempty-eob 7 9)
        (ovshould empty-eob    9 9)))))

(ert-deftest test-overlay-multibyte-transition-2 ()
  (with-temp-buffer
    (set-buffer-multibyte t)
    (insert "ääää")
    (set-buffer-multibyte nil)
    ;; aeaeaeae
    ;; 1 2 3 4 5
    ;; 123456789
    (let ((nonempty-bob-end (make-overlay 1 2))
          (nonempty-bob-beg (make-overlay 1 3))
          (empty-bob        (make-overlay 1 1))
          (empty-beg        (make-overlay 3 3))
          (empty-end        (make-overlay 2 2))
          (nonempty-beg-beg (make-overlay 3 7))
          (nonempty-beg-end (make-overlay 3 8))
          (nonempty-end-beg (make-overlay 4 7))
          (nonempty-end-end (make-overlay 4 8))
          (nonempty-eob-beg (make-overlay 5 9))
          (nonempty-eob-end (make-overlay 6 9))
          (empty-eob        (make-overlay 9 9)))
      (set-buffer-multibyte t)
      (cl-macrolet
          ((ovshould (ov begin end)
             `(should (equal (list (overlay-start ,ov) (overlay-end ,ov))
                             (list ,begin ,end)))))
        (ovshould nonempty-bob-end 1 2)
        (ovshould nonempty-bob-beg 1 2)
        (ovshould empty-bob        1 1)
        (ovshould empty-beg        2 2)
        (ovshould empty-end        2 2)
        (ovshould nonempty-beg-beg 2 4)
        (ovshould nonempty-beg-end 2 5)
        (ovshould nonempty-end-beg 3 4)
        (ovshould nonempty-end-end 3 5)
        (ovshould nonempty-eob-beg 3 5)
        (ovshould nonempty-eob-end 4 5)
        (ovshould empty-eob        5 5)))))




;; +===================================================================================+
;; | Autogenerated insert/delete/narrow tests
;; +===================================================================================+

(when nil ;; Let's comment these out for now.

;; (defun test-overlay-generate-test (name)
;;   (interactive)
;;   (with-temp-buffer
;;     (let ((forms nil)
;;           (buffer-size 64)
;;           (noverlays 16)
;;           (nforms 32)
;;           (dist '(0.5 0.4 0.1)))
;;       (cl-labels ((brand ()
;;                     (+ (point-min)
;;                        (random (1+ (- (point-max) (point-min)))))))
;;         (cl-macrolet ((push-eval (form)
;;                         `(cl-destructuring-bind (&rest args)
;;                              (list ,@(cdr form))
;;                            (push (cons ',(car form) args) forms)
;;                            (apply #',(car form) args))))
;;           (push-eval (insert (make-string buffer-size ?.)))
;;           (dotimes (_ noverlays)
;;             (push-eval (make-overlay (brand) (brand)
;;                                      nil
;;                                      (= 0 (random 2))
;;                                      (= 0 (random 2)))))
;;           (dotimes (_ nforms)
;;             (push-eval (goto-char (brand)))
;;             (pcase (/ (random 100) 100.0)
;;               ((and x (guard (< x (nth 0 dist))))
;;                (push-eval (insert (make-string (random 16) ?.))))
;;               ((and x (guard (< x (+ (nth 0 dist) (nth 1 dist)))))
;;                (push-eval (delete-char (random (1+ (- (point-max) (point)))))))
;;               (_
;;                (push-eval (widen))
;;                (push-eval (narrow-to-region (brand) (brand))))))
;;           `(ert-deftest ,name ()
;;              (with-temp-buffer
;;                ,@(nreverse forms)
;;                (should (equal (test-overlay-regions)
;;                               ',(test-overlay-regions))))))))))

;; (defun test-overlay-generate-tests (n)
;;   (let ((namefmt "overlay-autogenerated-test-%d")
;;         (standard-output (current-buffer))
;;         (print-length nil)
;;         (print-level nil)
;;         (print-quoted t))
;;     (dotimes (i n)
;;       (pp (test-overlay-generate-test (intern (format namefmt i))))
;;       (terpri))))

;; (progn (random "4711") (test-overlay-generate-tests 64))

(ert-deftest overlay-autogenerated-test-0 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 63 7 nil t t)
    (make-overlay 47 9 nil nil nil)
    (make-overlay 50 43 nil nil nil)
    (make-overlay 20 53 nil nil t)
    (make-overlay 62 4 nil nil t)
    (make-overlay 40 27 nil t t)
    (make-overlay 58 44 nil t t)
    (make-overlay 46 38 nil nil nil)
    (make-overlay 51 28 nil t nil)
    (make-overlay 12 53 nil t t)
    (make-overlay 52 60 nil nil nil)
    (make-overlay 13 47 nil nil nil)
    (make-overlay 16 31 nil nil nil)
    (make-overlay 9 48 nil t t)
    (make-overlay 43 29 nil nil t)
    (make-overlay 48 13 nil t nil)
    (goto-char 44)
    (delete-char 15)
    (goto-char 19)
    (widen)
    (narrow-to-region 20 8)
    (goto-char 9)
    (delete-char 3)
    (goto-char 16)
    (insert "..............")
    (goto-char 12)
    (delete-char 15)
    (goto-char 12)
    (delete-char 4)
    (goto-char 12)
    (delete-char 0)
    (goto-char 12)
    (insert "......")
    (goto-char 13)
    (delete-char 5)
    (goto-char 8)
    (insert "...")
    (goto-char 10)
    (insert ".............")
    (goto-char 14)
    (insert ".......")
    (goto-char 25)
    (delete-char 4)
    (goto-char 26)
    (insert "...............")
    (goto-char 27)
    (insert "...")
    (goto-char 29)
    (delete-char 7)
    (goto-char 24)
    (insert "...")
    (goto-char 30)
    (insert "..........")
    (goto-char 29)
    (widen)
    (narrow-to-region 34 41)
    (goto-char 40)
    (delete-char 0)
    (goto-char 35)
    (delete-char 4)
    (goto-char 36)
    (widen)
    (narrow-to-region 80 66)
    (goto-char 74)
    (delete-char 5)
    (goto-char 69)
    (delete-char 5)
    (goto-char 70)
    (widen)
    (narrow-to-region 50 71)
    (goto-char 66)
    (insert "...............")
    (goto-char 54)
    (insert "...............")
    (goto-char 84)
    (insert "....")
    (goto-char 72)
    (insert "...........")
    (goto-char 84)
    (insert "..........")
    (goto-char 102)
    (insert "")
    (goto-char 80)
    (delete-char 25)
    (should
     (equal
      (test-overlay-regions)
      '((4 . 99)
        (7 . 100)
        (48 . 99)
        (48 . 99)
        (48 . 99)
        (49 . 99)
        (49 . 99)
        (51 . 80)
        (51 . 99)
        (80 . 99)
        (80 . 99)
        (80 . 99)
        (99 . 99)
        (99 . 99)
        (99 . 99)
        (99 . 99))))))

(ert-deftest overlay-autogenerated-test-1 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 17 27 nil nil nil)
    (make-overlay 13 28 nil nil t)
    (make-overlay 8 56 nil nil nil)
    (make-overlay 34 64 nil nil nil)
    (make-overlay 51 4 nil t t)
    (make-overlay 1 19 nil nil nil)
    (make-overlay 53 59 nil nil t)
    (make-overlay 25 13 nil nil nil)
    (make-overlay 19 28 nil t nil)
    (make-overlay 33 23 nil t nil)
    (make-overlay 10 46 nil t t)
    (make-overlay 18 39 nil nil nil)
    (make-overlay 1 49 nil t nil)
    (make-overlay 57 21 nil t t)
    (make-overlay 10 58 nil t t)
    (make-overlay 39 49 nil nil t)
    (goto-char 37)
    (delete-char 9)
    (goto-char 3)
    (insert "......")
    (goto-char 38)
    (delete-char 14)
    (goto-char 18)
    (insert "..........")
    (goto-char 53)
    (insert "....")
    (goto-char 49)
    (delete-char 10)
    (goto-char 11)
    (delete-char 12)
    (goto-char 17)
    (delete-char 22)
    (goto-char 8)
    (insert ".")
    (goto-char 16)
    (insert "........")
    (goto-char 16)
    (delete-char 5)
    (goto-char 11)
    (delete-char 0)
    (goto-char 22)
    (insert ".......")
    (goto-char 18)
    (delete-char 11)
    (goto-char 16)
    (delete-char 0)
    (goto-char 9)
    (insert "...........")
    (goto-char 7)
    (insert "...............")
    (goto-char 2)
    (insert ".......")
    (goto-char 21)
    (delete-char 11)
    (goto-char 13)
    (insert "..............")
    (goto-char 17)
    (delete-char 3)
    (goto-char 21)
    (insert "......")
    (goto-char 15)
    (delete-char 32)
    (goto-char 10)
    (insert "........")
    (goto-char 25)
    (widen)
    (narrow-to-region 15 20)
    (goto-char 17)
    (insert ".............")
    (goto-char 22)
    (insert "............")
    (goto-char 21)
    (delete-char 8)
    (goto-char 36)
    (delete-char 1)
    (goto-char 32)
    (delete-char 2)
    (goto-char 21)
    (insert ".....")
    (goto-char 31)
    (insert "......")
    (should
     (equal
      (test-overlay-regions)
      '((1 . 58)
        (1 . 58))))))

(ert-deftest overlay-autogenerated-test-2 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 15 59 nil t t)
    (make-overlay 56 16 nil nil nil)
    (make-overlay 65 51 nil t nil)
    (make-overlay 14 24 nil t nil)
    (make-overlay 28 9 nil t nil)
    (make-overlay 58 50 nil t t)
    (make-overlay 13 32 nil t t)
    (make-overlay 12 21 nil t nil)
    (make-overlay 60 23 nil t nil)
    (make-overlay 39 38 nil nil t)
    (make-overlay 15 64 nil t nil)
    (make-overlay 17 21 nil nil t)
    (make-overlay 46 23 nil t t)
    (make-overlay 19 40 nil t nil)
    (make-overlay 13 48 nil nil t)
    (make-overlay 35 11 nil t nil)
    (goto-char 41)
    (delete-char 19)
    (goto-char 45)
    (insert "......")
    (goto-char 3)
    (delete-char 32)
    (goto-char 19)
    (insert "")
    (goto-char 16)
    (insert "...............")
    (goto-char 2)
    (insert "")
    (goto-char 30)
    (delete-char 0)
    (goto-char 18)
    (delete-char 17)
    (goto-char 2)
    (insert "...............")
    (goto-char 12)
    (insert "...")
    (goto-char 2)
    (insert ".............")
    (goto-char 16)
    (insert ".......")
    (goto-char 15)
    (insert ".......")
    (goto-char 43)
    (insert "......")
    (goto-char 22)
    (insert ".........")
    (goto-char 25)
    (delete-char 1)
    (goto-char 38)
    (insert "...............")
    (goto-char 76)
    (delete-char 3)
    (goto-char 12)
    (delete-char 5)
    (goto-char 70)
    (delete-char 9)
    (goto-char 36)
    (delete-char 4)
    (goto-char 18)
    (insert "...............")
    (goto-char 52)
    (delete-char 14)
    (goto-char 23)
    (insert "..........")
    (goto-char 64)
    (insert "...........")
    (goto-char 68)
    (delete-char 21)
    (goto-char 71)
    (insert "........")
    (goto-char 28)
    (delete-char 43)
    (goto-char 25)
    (insert "....")
    (goto-char 2)
    (insert "...............")
    (goto-char 40)
    (insert "....")
    (goto-char 56)
    (delete-char 2)
    (should
     (equal
      (test-overlay-regions)
      '((51 . 51)
        (51 . 51)
        (51 . 51)
        (51 . 51)
        (51 . 51)
        (51 . 51)
        (51 . 51)
        (51 . 51)
        (51 . 51)
        (51 . 51)
        (51 . 51)
        (51 . 51)
        (51 . 51)
        (51 . 51)
        (51 . 51)
        (51 . 58))))))

(ert-deftest overlay-autogenerated-test-3 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 53 38 nil t nil)
    (make-overlay 17 40 nil t t)
    (make-overlay 64 26 nil t t)
    (make-overlay 48 24 nil t nil)
    (make-overlay 21 18 nil nil nil)
    (make-overlay 2 20 nil nil t)
    (make-overlay 43 26 nil t t)
    (make-overlay 56 28 nil t nil)
    (make-overlay 19 51 nil nil nil)
    (make-overlay 39 61 nil t nil)
    (make-overlay 59 12 nil t nil)
    (make-overlay 65 7 nil t nil)
    (make-overlay 41 7 nil t nil)
    (make-overlay 62 50 nil t nil)
    (make-overlay 7 10 nil t t)
    (make-overlay 45 28 nil t nil)
    (goto-char 13)
    (insert "...")
    (goto-char 37)
    (widen)
    (narrow-to-region 2 10)
    (goto-char 8)
    (delete-char 1)
    (goto-char 3)
    (delete-char 6)
    (goto-char 2)
    (insert "...........")
    (goto-char 5)
    (widen)
    (narrow-to-region 55 70)
    (goto-char 55)
    (insert "......")
    (goto-char 64)
    (delete-char 12)
    (goto-char 61)
    (insert ".....")
    (goto-char 64)
    (insert "..............")
    (goto-char 72)
    (delete-char 6)
    (goto-char 63)
    (delete-char 12)
    (goto-char 63)
    (delete-char 2)
    (goto-char 57)
    (insert "..............")
    (goto-char 68)
    (insert "........")
    (goto-char 77)
    (delete-char 6)
    (goto-char 77)
    (insert ".............")
    (goto-char 67)
    (delete-char 0)
    (goto-char 84)
    (insert "........")
    (goto-char 74)
    (delete-char 12)
    (goto-char 78)
    (insert "...")
    (goto-char 80)
    (insert "............")
    (goto-char 69)
    (insert "......")
    (goto-char 89)
    (insert ".")
    (goto-char 56)
    (insert "....")
    (goto-char 100)
    (insert ".............")
    (goto-char 114)
    (delete-char 0)
    (goto-char 61)
    (widen)
    (narrow-to-region 94 50)
    (goto-char 55)
    (insert "............")
    (goto-char 53)
    (insert ".............")
    (goto-char 116)
    (delete-char 3)
    (goto-char 81)
    (insert "...............")
    (should
     (equal
      (test-overlay-regions)
      '((14 . 166)
        (16 . 164)
        (26 . 164)
        (31 . 68)
        (33 . 165)
        (35 . 52)
        (35 . 164)
        (45 . 164)
        (46 . 164))))))

(ert-deftest overlay-autogenerated-test-4 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 25 15 nil nil t)
    (make-overlay 8 13 nil nil nil)
    (make-overlay 45 49 nil t t)
    (make-overlay 22 13 nil t t)
    (make-overlay 34 17 nil nil t)
    (make-overlay 42 15 nil nil t)
    (make-overlay 43 28 nil t t)
    (make-overlay 3 28 nil t nil)
    (make-overlay 32 61 nil nil t)
    (make-overlay 30 64 nil t t)
    (make-overlay 21 39 nil nil t)
    (make-overlay 32 62 nil t nil)
    (make-overlay 25 29 nil t nil)
    (make-overlay 34 43 nil t nil)
    (make-overlay 9 11 nil t nil)
    (make-overlay 21 65 nil nil t)
    (goto-char 21)
    (delete-char 4)
    (goto-char 25)
    (insert "..")
    (goto-char 53)
    (insert "..")
    (goto-char 2)
    (insert "...............")
    (goto-char 42)
    (delete-char 36)
    (goto-char 23)
    (delete-char 12)
    (goto-char 22)
    (widen)
    (narrow-to-region 30 32)
    (goto-char 30)
    (delete-char 0)
    (goto-char 31)
    (delete-char 1)
    (goto-char 31)
    (widen)
    (narrow-to-region 28 27)
    (goto-char 27)
    (delete-char 1)
    (goto-char 27)
    (delete-char 0)
    (goto-char 27)
    (delete-char 0)
    (goto-char 27)
    (insert ".")
    (goto-char 28)
    (insert "......")
    (goto-char 34)
    (delete-char 0)
    (goto-char 27)
    (delete-char 5)
    (goto-char 27)
    (delete-char 1)
    (goto-char 27)
    (insert ".............")
    (goto-char 30)
    (insert "..............")
    (goto-char 37)
    (delete-char 15)
    (goto-char 32)
    (delete-char 2)
    (goto-char 36)
    (delete-char 1)
    (goto-char 34)
    (delete-char 0)
    (goto-char 34)
    (delete-char 1)
    (goto-char 32)
    (widen)
    (narrow-to-region 24 19)
    (goto-char 21)
    (delete-char 1)
    (goto-char 21)
    (widen)
    (narrow-to-region 11 38)
    (goto-char 27)
    (widen)
    (narrow-to-region 20 22)
    (goto-char 20)
    (delete-char 1)
    (goto-char 20)
    (widen)
    (narrow-to-region 36 4)
    (goto-char 26)
    (delete-char 9)
    (should
     (equal
      (test-overlay-regions)
      '((18 . 25)
        (21 . 21)
        (21 . 21)
        (21 . 22)
        (21 . 22)
        (21 . 27)
        (21 . 27)
        (22 . 25)
        (22 . 27)
        (22 . 28)
        (26 . 27))))))

(ert-deftest overlay-autogenerated-test-5 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 64 1 nil nil nil)
    (make-overlay 38 43 nil nil nil)
    (make-overlay 42 19 nil t nil)
    (make-overlay 22 12 nil nil nil)
    (make-overlay 12 30 nil t t)
    (make-overlay 38 46 nil nil nil)
    (make-overlay 18 23 nil nil nil)
    (make-overlay 58 65 nil nil t)
    (make-overlay 52 41 nil nil nil)
    (make-overlay 12 26 nil nil nil)
    (make-overlay 39 4 nil nil nil)
    (make-overlay 20 1 nil nil t)
    (make-overlay 36 60 nil nil nil)
    (make-overlay 24 18 nil t nil)
    (make-overlay 9 50 nil nil nil)
    (make-overlay 19 17 nil t nil)
    (goto-char 40)
    (insert "")
    (goto-char 64)
    (insert ".............")
    (goto-char 32)
    (delete-char 40)
    (goto-char 25)
    (insert "...")
    (goto-char 31)
    (delete-char 1)
    (goto-char 8)
    (delete-char 14)
    (goto-char 20)
    (delete-char 5)
    (goto-char 20)
    (insert "...........")
    (goto-char 20)
    (insert ".........")
    (goto-char 17)
    (widen)
    (narrow-to-region 11 21)
    (goto-char 14)
    (widen)
    (narrow-to-region 9 24)
    (goto-char 24)
    (insert ".............")
    (goto-char 30)
    (widen)
    (narrow-to-region 47 45)
    (goto-char 47)
    (insert ".")
    (goto-char 46)
    (widen)
    (narrow-to-region 30 42)
    (goto-char 32)
    (delete-char 0)
    (goto-char 34)
    (insert ".......")
    (goto-char 42)
    (delete-char 4)
    (goto-char 39)
    (delete-char 6)
    (goto-char 31)
    (delete-char 6)
    (goto-char 31)
    (insert "............")
    (goto-char 30)
    (insert "......")
    (goto-char 50)
    (delete-char 0)
    (goto-char 30)
    (insert "....")
    (goto-char 53)
    (insert "............")
    (goto-char 41)
    (delete-char 12)
    (goto-char 52)
    (insert ".......")
    (goto-char 56)
    (insert "...........")
    (goto-char 68)
    (insert ".......")
    (goto-char 52)
    (insert "......")
    (goto-char 71)
    (delete-char 10)
    (goto-char 47)
    (insert "")
    (should
     (equal
      (test-overlay-regions)
      '((20 . 89))))))

(ert-deftest overlay-autogenerated-test-6 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 28 59 nil nil nil)
    (make-overlay 36 21 nil t t)
    (make-overlay 60 19 nil t nil)
    (make-overlay 26 30 nil t nil)
    (make-overlay 47 27 nil nil t)
    (make-overlay 8 25 nil t t)
    (make-overlay 57 43 nil t t)
    (make-overlay 28 61 nil nil t)
    (make-overlay 42 31 nil nil t)
    (make-overlay 15 44 nil t nil)
    (make-overlay 56 38 nil nil nil)
    (make-overlay 39 44 nil nil t)
    (make-overlay 50 6 nil t nil)
    (make-overlay 6 19 nil t nil)
    (make-overlay 50 44 nil t t)
    (make-overlay 34 60 nil nil t)
    (goto-char 27)
    (insert "...............")
    (goto-char 23)
    (insert "..............")
    (goto-char 50)
    (widen)
    (narrow-to-region 53 67)
    (goto-char 60)
    (delete-char 0)
    (goto-char 54)
    (insert "......")
    (goto-char 64)
    (delete-char 1)
    (goto-char 66)
    (delete-char 3)
    (goto-char 58)
    (insert ".............")
    (goto-char 58)
    (insert ".........")
    (goto-char 76)
    (insert "...........")
    (goto-char 57)
    (insert "....")
    (goto-char 106)
    (widen)
    (narrow-to-region 5 45)
    (goto-char 31)
    (delete-char 8)
    (goto-char 36)
    (insert "...")
    (goto-char 6)
    (insert "........")
    (goto-char 33)
    (insert ".............")
    (goto-char 38)
    (delete-char 3)
    (goto-char 28)
    (delete-char 6)
    (goto-char 42)
    (widen)
    (narrow-to-region 17 25)
    (goto-char 19)
    (insert "..............")
    (goto-char 37)
    (delete-char 1)
    (goto-char 22)
    (delete-char 9)
    (goto-char 28)
    (insert "..............")
    (goto-char 37)
    (delete-char 3)
    (goto-char 18)
    (insert "...............")
    (goto-char 30)
    (widen)
    (narrow-to-region 68 25)
    (goto-char 38)
    (delete-char 22)
    (goto-char 43)
    (widen)
    (narrow-to-region 47 96)
    (goto-char 86)
    (insert ".")
    (goto-char 63)
    (insert "......")
    (goto-char 78)
    (widen)
    (narrow-to-region 61 27)
    (goto-char 43)
    (delete-char 8)
    (should
     (equal
      (test-overlay-regions)
      '((14 . 38)
        (14 . 132)
        (16 . 43)
        (38 . 118)
        (38 . 126)
        (38 . 142)
        (44 . 115)
        (45 . 129))))))

(ert-deftest overlay-autogenerated-test-7 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 13 50 nil t nil)
    (make-overlay 28 44 nil nil t)
    (make-overlay 56 27 nil t nil)
    (make-overlay 8 34 nil nil nil)
    (make-overlay 22 8 nil nil t)
    (make-overlay 8 28 nil t nil)
    (make-overlay 65 31 nil nil t)
    (make-overlay 44 8 nil nil nil)
    (make-overlay 52 64 nil nil t)
    (make-overlay 52 27 nil t t)
    (make-overlay 47 32 nil nil nil)
    (make-overlay 18 62 nil nil nil)
    (make-overlay 18 24 nil t t)
    (make-overlay 33 46 nil nil t)
    (make-overlay 20 8 nil t nil)
    (make-overlay 51 51 nil t nil)
    (goto-char 2)
    (delete-char 46)
    (goto-char 12)
    (delete-char 5)
    (goto-char 2)
    (delete-char 12)
    (goto-char 2)
    (insert "..")
    (goto-char 2)
    (widen)
    (narrow-to-region 2 4)
    (goto-char 4)
    (insert "......")
    (goto-char 4)
    (widen)
    (narrow-to-region 4 6)
    (goto-char 5)
    (insert "")
    (goto-char 6)
    (insert "...............")
    (goto-char 9)
    (insert "...")
    (goto-char 7)
    (delete-char 13)
    (goto-char 8)
    (delete-char 1)
    (goto-char 9)
    (insert "...............")
    (goto-char 24)
    (delete-char 1)
    (goto-char 15)
    (insert "...............")
    (goto-char 16)
    (insert "............")
    (goto-char 17)
    (delete-char 8)
    (goto-char 36)
    (widen)
    (narrow-to-region 47 38)
    (goto-char 43)
    (delete-char 0)
    (goto-char 46)
    (delete-char 0)
    (goto-char 40)
    (delete-char 4)
    (goto-char 39)
    (insert ".......")
    (goto-char 50)
    (delete-char 0)
    (goto-char 47)
    (insert "...........")
    (goto-char 45)
    (insert ".....")
    (goto-char 38)
    (delete-char 3)
    (goto-char 59)
    (delete-char 1)
    (goto-char 42)
    (insert "...............")
    (goto-char 65)
    (insert "...........")
    (goto-char 73)
    (delete-char 13)
    (goto-char 72)
    (insert "....")
    (goto-char 47)
    (insert "..")
    (should
     (equal
      (test-overlay-regions)
      '((2 . 81)
        (2 . 81)
        (2 . 81)
        (2 . 81)
        (2 . 81)
        (81 . 81)
        (81 . 81))))))

(ert-deftest overlay-autogenerated-test-8 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 20 6 nil t nil)
    (make-overlay 48 13 nil t nil)
    (make-overlay 58 65 nil nil t)
    (make-overlay 63 65 nil nil nil)
    (make-overlay 42 40 nil t t)
    (make-overlay 40 6 nil nil t)
    (make-overlay 37 46 nil t nil)
    (make-overlay 4 14 nil nil nil)
    (make-overlay 58 44 nil t t)
    (make-overlay 14 16 nil nil t)
    (make-overlay 31 61 nil t nil)
    (make-overlay 34 3 nil nil nil)
    (make-overlay 11 16 nil t nil)
    (make-overlay 19 42 nil nil t)
    (make-overlay 30 9 nil nil t)
    (make-overlay 63 52 nil t t)
    (goto-char 57)
    (delete-char 2)
    (goto-char 8)
    (insert "........")
    (goto-char 30)
    (insert "...........")
    (goto-char 35)
    (insert "...........")
    (goto-char 66)
    (insert "...............")
    (goto-char 53)
    (delete-char 15)
    (goto-char 75)
    (delete-char 10)
    (goto-char 62)
    (delete-char 21)
    (goto-char 52)
    (delete-char 10)
    (goto-char 10)
    (insert "............")
    (goto-char 42)
    (insert "...........")
    (goto-char 68)
    (insert ".............")
    (goto-char 12)
    (insert "........")
    (goto-char 1)
    (insert "...............")
    (goto-char 89)
    (insert "")
    (goto-char 94)
    (insert ".............")
    (goto-char 57)
    (insert "...........")
    (goto-char 130)
    (insert "...")
    (goto-char 69)
    (insert "..")
    (goto-char 101)
    (insert "......")
    (goto-char 128)
    (delete-char 13)
    (goto-char 19)
    (delete-char 100)
    (goto-char 22)
    (insert "..")
    (goto-char 13)
    (widen)
    (narrow-to-region 30 16)
    (goto-char 19)
    (insert "..........")
    (goto-char 22)
    (delete-char 3)
    (goto-char 19)
    (insert ".........")
    (goto-char 17)
    (insert "..")
    (goto-char 16)
    (insert "............")
    (goto-char 47)
    (insert ".")
    (goto-char 50)
    (insert "..........")
    (goto-char 70)
    (delete-char 1)
    (should
     (equal
      (test-overlay-regions)
      '((32 . 75)
        (33 . 33)
        (33 . 33)
        (33 . 33)
        (33 . 60)
        (33 . 75)
        (33 . 75)
        (33 . 75)
        (60 . 75))))))

(ert-deftest overlay-autogenerated-test-9 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 58 13 nil nil nil)
    (make-overlay 29 4 nil nil t)
    (make-overlay 3 53 nil nil nil)
    (make-overlay 31 9 nil t t)
    (make-overlay 48 30 nil nil nil)
    (make-overlay 43 50 nil nil nil)
    (make-overlay 7 27 nil nil t)
    (make-overlay 30 59 nil nil nil)
    (make-overlay 42 25 nil nil t)
    (make-overlay 15 13 nil t t)
    (make-overlay 39 11 nil t t)
    (make-overlay 21 62 nil t t)
    (make-overlay 35 2 nil t nil)
    (make-overlay 60 53 nil nil t)
    (make-overlay 64 8 nil nil t)
    (make-overlay 58 59 nil t t)
    (goto-char 28)
    (insert ".............")
    (goto-char 28)
    (insert "...............")
    (goto-char 71)
    (insert ".......")
    (goto-char 65)
    (insert "......")
    (goto-char 3)
    (delete-char 12)
    (goto-char 79)
    (delete-char 11)
    (goto-char 65)
    (widen)
    (narrow-to-region 12 53)
    (goto-char 38)
    (insert ".......")
    (goto-char 20)
    (insert ".........")
    (goto-char 27)
    (insert "...........")
    (goto-char 75)
    (insert "........")
    (goto-char 85)
    (insert "............")
    (goto-char 52)
    (insert "..........")
    (goto-char 16)
    (delete-char 8)
    (goto-char 15)
    (insert "...............")
    (goto-char 112)
    (insert "")
    (goto-char 61)
    (insert "..")
    (goto-char 29)
    (delete-char 34)
    (goto-char 52)
    (delete-char 32)
    (goto-char 43)
    (insert "........")
    (goto-char 45)
    (insert "..")
    (goto-char 35)
    (insert "...........")
    (goto-char 29)
    (insert ".......")
    (goto-char 75)
    (widen)
    (narrow-to-region 69 55)
    (goto-char 67)
    (delete-char 2)
    (goto-char 66)
    (delete-char 0)
    (goto-char 62)
    (delete-char 1)
    (goto-char 61)
    (delete-char 3)
    (goto-char 63)
    (insert ".")
    (goto-char 56)
    (insert ".....")
    (goto-char 67)
    (insert ".............")
    (goto-char 76)
    (delete-char 3)
    (should
     (equal
      (test-overlay-regions)
      '((2 . 90)
        (3 . 90)
        (3 . 90)
        (3 . 99)
        (3 . 117)
        (3 . 117)
        (3 . 120)
        (9 . 118)
        (13 . 102))))))

(ert-deftest overlay-autogenerated-test-10 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 16 60 nil nil nil)
    (make-overlay 36 53 nil nil nil)
    (make-overlay 44 39 nil t t)
    (make-overlay 61 47 nil t t)
    (make-overlay 58 39 nil nil t)
    (make-overlay 23 54 nil nil t)
    (make-overlay 65 59 nil t t)
    (make-overlay 13 57 nil nil t)
    (make-overlay 22 64 nil nil t)
    (make-overlay 16 19 nil nil nil)
    (make-overlay 16 1 nil nil t)
    (make-overlay 28 21 nil t t)
    (make-overlay 10 62 nil nil nil)
    (make-overlay 12 18 nil nil t)
    (make-overlay 15 5 nil nil t)
    (make-overlay 36 31 nil nil t)
    (goto-char 42)
    (insert "...")
    (goto-char 25)
    (delete-char 28)
    (goto-char 30)
    (delete-char 10)
    (goto-char 8)
    (delete-char 9)
    (goto-char 5)
    (insert "........")
    (goto-char 6)
    (delete-char 2)
    (goto-char 4)
    (insert "")
    (goto-char 21)
    (insert ".............")
    (goto-char 6)
    (delete-char 33)
    (goto-char 1)
    (delete-char 1)
    (goto-char 6)
    (insert "..........")
    (goto-char 8)
    (insert "...........")
    (goto-char 21)
    (insert "........")
    (goto-char 16)
    (delete-char 18)
    (goto-char 5)
    (insert "...")
    (goto-char 5)
    (delete-char 8)
    (goto-char 11)
    (insert ".")
    (goto-char 1)
    (insert ".......")
    (goto-char 9)
    (delete-char 9)
    (goto-char 5)
    (insert "")
    (goto-char 8)
    (delete-char 0)
    (goto-char 11)
    (insert "..............")
    (goto-char 12)
    (insert "")
    (goto-char 11)
    (delete-char 8)
    (goto-char 7)
    (delete-char 3)
    (goto-char 5)
    (delete-char 3)
    (goto-char 1)
    (delete-char 8)
    (goto-char 1)
    (insert "....")
    (goto-char 1)
    (insert "..")
    (goto-char 7)
    (insert "...")
    (goto-char 8)
    (widen)
    (narrow-to-region 9 11)
    (goto-char 11)
    (delete-char 0)
    (should
     (equal
      (test-overlay-regions)
      '((1 . 10)
        (1 . 10)
        (1 . 10)
        (1 . 10)
        (1 . 10)
        (1 . 12)
        (1 . 12)
        (1 . 12)
        (10 . 10)
        (10 . 10)
        (10 . 12))))))

(ert-deftest overlay-autogenerated-test-11 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 33 18 nil nil nil)
    (make-overlay 56 38 nil t nil)
    (make-overlay 2 45 nil nil t)
    (make-overlay 19 55 nil nil t)
    (make-overlay 28 42 nil t t)
    (make-overlay 50 29 nil t nil)
    (make-overlay 40 63 nil nil nil)
    (make-overlay 13 2 nil nil t)
    (make-overlay 26 7 nil t t)
    (make-overlay 22 25 nil nil nil)
    (make-overlay 14 14 nil t nil)
    (make-overlay 15 39 nil t t)
    (make-overlay 51 22 nil t t)
    (make-overlay 58 5 nil t nil)
    (make-overlay 16 10 nil nil nil)
    (make-overlay 32 33 nil t nil)
    (goto-char 40)
    (delete-char 20)
    (goto-char 45)
    (delete-char 0)
    (goto-char 6)
    (insert "..")
    (goto-char 45)
    (insert "...")
    (goto-char 26)
    (insert "...............")
    (goto-char 27)
    (insert "...........")
    (goto-char 38)
    (insert "......")
    (goto-char 62)
    (insert "...............")
    (goto-char 18)
    (insert "...........")
    (goto-char 99)
    (widen)
    (narrow-to-region 37 17)
    (goto-char 29)
    (delete-char 2)
    (goto-char 28)
    (delete-char 2)
    (goto-char 17)
    (insert ".....")
    (goto-char 21)
    (widen)
    (narrow-to-region 34 96)
    (goto-char 44)
    (delete-char 22)
    (goto-char 39)
    (insert "..")
    (goto-char 53)
    (insert "...............")
    (goto-char 58)
    (insert ".............")
    (goto-char 93)
    (insert ".........")
    (goto-char 78)
    (widen)
    (narrow-to-region 27 104)
    (goto-char 93)
    (delete-char 11)
    (goto-char 59)
    (insert "....")
    (goto-char 59)
    (insert "..............")
    (goto-char 74)
    (delete-char 5)
    (goto-char 70)
    (insert ".")
    (goto-char 37)
    (insert "...........")
    (goto-char 34)
    (delete-char 46)
    (goto-char 49)
    (insert "......")
    (goto-char 55)
    (insert "...")
    (goto-char 42)
    (insert "...")
    (goto-char 70)
    (delete-char 8)
    (goto-char 48)
    (delete-char 28)
    (should
     (equal
      (test-overlay-regions)
      '((2 . 62)
        (5 . 62)
        (9 . 34)
        (22 . 61)
        (33 . 55)
        (33 . 62)
        (34 . 34)
        (34 . 62))))))

(ert-deftest overlay-autogenerated-test-12 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 18 50 nil nil nil)
    (make-overlay 63 3 nil nil t)
    (make-overlay 44 20 nil t t)
    (make-overlay 58 38 nil nil t)
    (make-overlay 3 17 nil t nil)
    (make-overlay 31 62 nil t nil)
    (make-overlay 12 17 nil t nil)
    (make-overlay 17 52 nil nil nil)
    (make-overlay 9 35 nil nil nil)
    (make-overlay 17 38 nil nil nil)
    (make-overlay 53 54 nil nil t)
    (make-overlay 65 34 nil t nil)
    (make-overlay 12 33 nil t nil)
    (make-overlay 54 58 nil nil nil)
    (make-overlay 42 26 nil t nil)
    (make-overlay 2 4 nil t nil)
    (goto-char 4)
    (delete-char 26)
    (goto-char 39)
    (insert ".")
    (goto-char 2)
    (delete-char 14)
    (goto-char 16)
    (widen)
    (narrow-to-region 19 1)
    (goto-char 7)
    (delete-char 9)
    (goto-char 6)
    (insert ".........")
    (goto-char 6)
    (insert "..........")
    (goto-char 16)
    (insert ".............")
    (goto-char 36)
    (delete-char 1)
    (goto-char 4)
    (insert "..........")
    (goto-char 49)
    (delete-char 2)
    (goto-char 16)
    (insert "............")
    (goto-char 52)
    (widen)
    (narrow-to-region 36 38)
    (goto-char 37)
    (delete-char 1)
    (goto-char 37)
    (insert ".............")
    (goto-char 46)
    (insert ".")
    (goto-char 40)
    (delete-char 5)
    (goto-char 45)
    (delete-char 0)
    (goto-char 46)
    (delete-char 0)
    (goto-char 40)
    (insert "..........")
    (goto-char 39)
    (delete-char 4)
    (goto-char 39)
    (delete-char 3)
    (goto-char 40)
    (widen)
    (narrow-to-region 8 9)
    (goto-char 8)
    (delete-char 1)
    (goto-char 8)
    (delete-char 0)
    (goto-char 8)
    (widen)
    (narrow-to-region 45 15)
    (goto-char 40)
    (insert "...............")
    (goto-char 29)
    (delete-char 7)
    (goto-char 30)
    (delete-char 6)
    (goto-char 21)
    (delete-char 9)
    (goto-char 22)
    (insert "...............")
    (goto-char 51)
    (insert "..............")
    (should
     (equal
      (test-overlay-regions)
      '((2 . 92)
        (2 . 92)
        (2 . 93)
        (2 . 96)
        (2 . 97)
        (2 . 99))))))

(ert-deftest overlay-autogenerated-test-13 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 18 30 nil t t)
    (make-overlay 54 37 nil nil t)
    (make-overlay 16 61 nil nil t)
    (make-overlay 58 7 nil nil t)
    (make-overlay 27 39 nil nil t)
    (make-overlay 39 31 nil nil t)
    (make-overlay 11 47 nil nil nil)
    (make-overlay 47 40 nil t t)
    (make-overlay 27 18 nil nil nil)
    (make-overlay 33 26 nil nil t)
    (make-overlay 55 4 nil t t)
    (make-overlay 62 50 nil t t)
    (make-overlay 47 65 nil t t)
    (make-overlay 17 23 nil nil t)
    (make-overlay 30 31 nil t nil)
    (make-overlay 10 37 nil t nil)
    (goto-char 8)
    (delete-char 6)
    (goto-char 56)
    (delete-char 0)
    (goto-char 28)
    (insert ".........")
    (goto-char 19)
    (insert "..............")
    (goto-char 4)
    (delete-char 28)
    (goto-char 49)
    (delete-char 4)
    (goto-char 2)
    (insert "............")
    (goto-char 10)
    (delete-char 37)
    (goto-char 19)
    (delete-char 2)
    (goto-char 20)
    (delete-char 0)
    (goto-char 16)
    (insert "..")
    (goto-char 8)
    (widen)
    (narrow-to-region 12 3)
    (goto-char 10)
    (delete-char 2)
    (goto-char 9)
    (insert "..")
    (goto-char 12)
    (insert "...............")
    (goto-char 25)
    (insert ".....")
    (goto-char 10)
    (widen)
    (narrow-to-region 42 18)
    (goto-char 20)
    (insert ".......")
    (goto-char 18)
    (insert ".........")
    (goto-char 55)
    (delete-char 3)
    (goto-char 48)
    (insert ".......")
    (goto-char 52)
    (delete-char 6)
    (goto-char 45)
    (delete-char 11)
    (goto-char 27)
    (delete-char 13)
    (goto-char 22)
    (insert "...........")
    (goto-char 19)
    (delete-char 15)
    (goto-char 20)
    (delete-char 0)
    (goto-char 23)
    (widen)
    (narrow-to-region 12 25)
    (goto-char 16)
    (insert "..........")
    (goto-char 25)
    (widen)
    (narrow-to-region 2 38)
    (goto-char 34)
    (delete-char 0)
    (goto-char 31)
    (insert "...............")
    (should
     (equal
      (test-overlay-regions)
      '((12 . 12)
        (12 . 12)
        (12 . 12)
        (12 . 12)
        (12 . 53)
        (12 . 53)
        (12 . 53)
        (12 . 53)
        (12 . 53)
        (12 . 53)
        (12 . 55))))))

(ert-deftest overlay-autogenerated-test-14 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 29 37 nil t nil)
    (make-overlay 15 44 nil nil nil)
    (make-overlay 31 34 nil nil t)
    (make-overlay 35 33 nil t t)
    (make-overlay 4 27 nil t t)
    (make-overlay 37 5 nil nil t)
    (make-overlay 58 19 nil nil t)
    (make-overlay 57 47 nil nil t)
    (make-overlay 49 5 nil t t)
    (make-overlay 21 59 nil t t)
    (make-overlay 42 33 nil t nil)
    (make-overlay 22 16 nil t t)
    (make-overlay 9 51 nil t nil)
    (make-overlay 20 24 nil nil t)
    (make-overlay 21 7 nil t t)
    (make-overlay 58 52 nil t t)
    (goto-char 39)
    (widen)
    (narrow-to-region 55 54)
    (goto-char 54)
    (insert ".............")
    (goto-char 55)
    (insert "............")
    (goto-char 66)
    (delete-char 10)
    (goto-char 62)
    (insert "...............")
    (goto-char 82)
    (delete-char 2)
    (goto-char 82)
    (delete-char 0)
    (goto-char 76)
    (insert "..............")
    (goto-char 60)
    (insert ".............")
    (goto-char 71)
    (insert "...............")
    (goto-char 122)
    (delete-char 0)
    (goto-char 93)
    (delete-char 3)
    (goto-char 108)
    (delete-char 1)
    (goto-char 121)
    (insert "........")
    (goto-char 92)
    (insert "")
    (goto-char 103)
    (insert "..........")
    (goto-char 85)
    (delete-char 13)
    (goto-char 116)
    (delete-char 7)
    (goto-char 103)
    (widen)
    (narrow-to-region 60 27)
    (goto-char 28)
    (delete-char 16)
    (goto-char 35)
    (insert ".......")
    (goto-char 47)
    (insert "........")
    (goto-char 38)
    (delete-char 1)
    (goto-char 43)
    (insert "..........")
    (goto-char 59)
    (insert "........")
    (goto-char 57)
    (insert "........")
    (goto-char 36)
    (insert "...........")
    (goto-char 82)
    (delete-char 11)
    (goto-char 67)
    (insert "..........")
    (goto-char 46)
    (delete-char 1)
    (goto-char 47)
    (insert "......")
    (goto-char 69)
    (delete-char 7)
    (should
     (equal
      (test-overlay-regions)
      '((5 . 28)
        (5 . 33)
        (9 . 35)
        (15 . 28)
        (19 . 154)
        (21 . 155)
        (28 . 28)
        (28 . 28)
        (28 . 28)
        (28 . 28)
        (31 . 153)
        (58 . 154))))))

(ert-deftest overlay-autogenerated-test-15 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 3 19 nil t t)
    (make-overlay 11 18 nil t nil)
    (make-overlay 28 51 nil nil t)
    (make-overlay 29 15 nil t t)
    (make-overlay 46 57 nil t t)
    (make-overlay 26 24 nil nil nil)
    (make-overlay 29 43 nil nil nil)
    (make-overlay 54 29 nil nil nil)
    (make-overlay 34 52 nil t nil)
    (make-overlay 10 32 nil nil nil)
    (make-overlay 28 34 nil nil t)
    (make-overlay 11 43 nil nil nil)
    (make-overlay 18 50 nil t t)
    (make-overlay 28 39 nil nil nil)
    (make-overlay 62 62 nil t t)
    (make-overlay 30 62 nil t nil)
    (goto-char 30)
    (widen)
    (narrow-to-region 6 22)
    (goto-char 9)
    (insert "..")
    (goto-char 12)
    (insert ".............")
    (goto-char 29)
    (insert "..............")
    (goto-char 47)
    (insert "........")
    (goto-char 46)
    (insert ".............")
    (goto-char 55)
    (insert "..........")
    (goto-char 62)
    (insert "...............")
    (goto-char 47)
    (delete-char 49)
    (goto-char 11)
    (insert "...........")
    (goto-char 40)
    (delete-char 1)
    (goto-char 27)
    (insert "..............")
    (goto-char 51)
    (insert "......")
    (goto-char 60)
    (delete-char 10)
    (goto-char 37)
    (insert ".........")
    (goto-char 69)
    (insert ".")
    (goto-char 36)
    (insert "............")
    (goto-char 75)
    (insert ".............")
    (goto-char 21)
    (widen)
    (narrow-to-region 44 21)
    (goto-char 37)
    (insert ".............")
    (goto-char 55)
    (widen)
    (narrow-to-region 84 28)
    (goto-char 58)
    (widen)
    (narrow-to-region 96 49)
    (goto-char 62)
    (delete-char 0)
    (goto-char 72)
    (delete-char 24)
    (goto-char 61)
    (widen)
    (narrow-to-region 105 83)
    (goto-char 96)
    (widen)
    (narrow-to-region 109 46)
    (goto-char 95)
    (delete-char 4)
    (goto-char 81)
    (insert ".")
    (goto-char 51)
    (delete-char 8)
    (goto-char 52)
    (insert ".")
    (goto-char 60)
    (delete-char 10)
    (goto-char 50)
    (insert "......")
    (should
     (equal
      (test-overlay-regions)
      '((3 . 81)
        (23 . 88)
        (66 . 99)
        (69 . 81)
        (78 . 85)
        (81 . 106)
        (84 . 85)
        (85 . 90)
        (85 . 95)
        (85 . 99)
        (85 . 107)
        (85 . 110)
        (86 . 118)
        (90 . 108))))))

(ert-deftest overlay-autogenerated-test-16 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 3 55 nil t nil)
    (make-overlay 45 47 nil nil nil)
    (make-overlay 23 57 nil t t)
    (make-overlay 64 55 nil nil nil)
    (make-overlay 37 26 nil t t)
    (make-overlay 29 38 nil nil t)
    (make-overlay 33 3 nil t t)
    (make-overlay 49 16 nil t nil)
    (make-overlay 35 56 nil t t)
    (make-overlay 9 39 nil nil nil)
    (make-overlay 2 61 nil nil nil)
    (make-overlay 59 26 nil nil t)
    (make-overlay 5 50 nil t t)
    (make-overlay 19 19 nil nil t)
    (make-overlay 64 21 nil t nil)
    (make-overlay 21 8 nil nil t)
    (goto-char 17)
    (insert ".....")
    (goto-char 29)
    (insert "............")
    (goto-char 42)
    (delete-char 38)
    (goto-char 24)
    (insert "")
    (goto-char 9)
    (delete-char 2)
    (goto-char 20)
    (insert "..")
    (goto-char 27)
    (delete-char 8)
    (goto-char 25)
    (delete-char 6)
    (goto-char 8)
    (delete-char 21)
    (goto-char 9)
    (insert "..............")
    (goto-char 3)
    (insert "....")
    (goto-char 8)
    (delete-char 18)
    (goto-char 6)
    (widen)
    (narrow-to-region 5 8)
    (goto-char 5)
    (delete-char 3)
    (goto-char 5)
    (insert "...")
    (goto-char 8)
    (insert "..........")
    (goto-char 5)
    (insert "")
    (goto-char 7)
    (delete-char 8)
    (goto-char 8)
    (widen)
    (narrow-to-region 2 2)
    (goto-char 2)
    (delete-char 0)
    (goto-char 2)
    (delete-char 0)
    (goto-char 2)
    (delete-char 0)
    (goto-char 2)
    (delete-char 0)
    (goto-char 2)
    (widen)
    (narrow-to-region 10 3)
    (goto-char 8)
    (delete-char 2)
    (goto-char 7)
    (insert ".......")
    (goto-char 8)
    (delete-char 3)
    (goto-char 12)
    (insert "..")
    (goto-char 9)
    (delete-char 2)
    (goto-char 7)
    (insert "......")
    (goto-char 15)
    (insert "..........")
    (goto-char 4)
    (insert "........")
    (should
     (equal
      (test-overlay-regions)
      '((2 . 13)
        (13 . 13)
        (13 . 13)
        (13 . 13)
        (13 . 13)
        (13 . 13)
        (13 . 13)
        (13 . 36)
        (13 . 36)
        (13 . 36)
        (13 . 36))))))

(ert-deftest overlay-autogenerated-test-17 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 15 37 nil t nil)
    (make-overlay 40 3 nil t t)
    (make-overlay 61 19 nil t t)
    (make-overlay 46 9 nil nil t)
    (make-overlay 64 39 nil nil t)
    (make-overlay 50 58 nil nil t)
    (make-overlay 21 30 nil t nil)
    (make-overlay 44 54 nil t nil)
    (make-overlay 32 2 nil t nil)
    (make-overlay 14 9 nil t t)
    (make-overlay 41 40 nil t nil)
    (make-overlay 17 26 nil t nil)
    (make-overlay 57 50 nil t t)
    (make-overlay 16 65 nil nil t)
    (make-overlay 13 61 nil t t)
    (make-overlay 39 64 nil nil t)
    (goto-char 37)
    (widen)
    (narrow-to-region 12 1)
    (goto-char 12)
    (insert "......")
    (goto-char 8)
    (delete-char 4)
    (goto-char 11)
    (delete-char 3)
    (goto-char 6)
    (insert ".....")
    (goto-char 6)
    (widen)
    (narrow-to-region 53 48)
    (goto-char 48)
    (delete-char 5)
    (goto-char 48)
    (widen)
    (narrow-to-region 59 58)
    (goto-char 59)
    (delete-char 0)
    (goto-char 58)
    (insert "...")
    (goto-char 60)
    (insert "...............")
    (goto-char 58)
    (insert ".............")
    (goto-char 67)
    (insert ".....")
    (goto-char 73)
    (insert "")
    (goto-char 68)
    (insert ".....")
    (goto-char 64)
    (insert "....")
    (goto-char 62)
    (insert "..")
    (goto-char 91)
    (insert "..........")
    (goto-char 80)
    (insert "............")
    (goto-char 100)
    (delete-char 21)
    (goto-char 74)
    (insert "...")
    (goto-char 60)
    (delete-char 30)
    (goto-char 64)
    (widen)
    (narrow-to-region 71 23)
    (goto-char 53)
    (delete-char 11)
    (goto-char 23)
    (delete-char 21)
    (goto-char 39)
    (delete-char 0)
    (goto-char 35)
    (insert "")
    (goto-char 35)
    (insert ".........")
    (goto-char 30)
    (insert "...........")
    (goto-char 35)
    (insert "..")
    (goto-char 37)
    (delete-char 1)
    (goto-char 28)
    (delete-char 3)
    (should
     (equal
      (test-overlay-regions)
      '((13 . 27)
        (17 . 67)
        (20 . 71)
        (23 . 23)
        (23 . 24)
        (23 . 67)
        (23 . 70)
        (23 . 70)
        (27 . 41)
        (28 . 41)
        (28 . 41))))))

(ert-deftest overlay-autogenerated-test-18 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 43 52 nil nil t)
    (make-overlay 27 29 nil nil t)
    (make-overlay 24 18 nil nil nil)
    (make-overlay 39 52 nil nil nil)
    (make-overlay 33 62 nil t t)
    (make-overlay 16 7 nil t nil)
    (make-overlay 47 39 nil nil t)
    (make-overlay 59 41 nil nil nil)
    (make-overlay 22 55 nil nil t)
    (make-overlay 60 16 nil t t)
    (make-overlay 55 20 nil nil t)
    (make-overlay 25 12 nil nil t)
    (make-overlay 26 2 nil nil t)
    (make-overlay 17 35 nil nil t)
    (make-overlay 46 41 nil t nil)
    (make-overlay 57 53 nil t t)
    (goto-char 52)
    (insert "")
    (goto-char 4)
    (delete-char 21)
    (goto-char 17)
    (insert "")
    (goto-char 35)
    (insert "...............")
    (goto-char 8)
    (insert "...............")
    (goto-char 9)
    (insert "........")
    (goto-char 73)
    (delete-char 9)
    (goto-char 62)
    (insert "...............")
    (goto-char 27)
    (widen)
    (narrow-to-region 34 84)
    (goto-char 81)
    (insert "...........")
    (goto-char 48)
    (insert "...")
    (goto-char 74)
    (insert ".......")
    (goto-char 41)
    (widen)
    (narrow-to-region 37 105)
    (goto-char 75)
    (insert "...............")
    (goto-char 47)
    (insert "..........")
    (goto-char 99)
    (delete-char 13)
    (goto-char 105)
    (delete-char 4)
    (goto-char 94)
    (delete-char 5)
    (goto-char 96)
    (insert "..............")
    (goto-char 74)
    (insert "")
    (goto-char 121)
    (insert "...")
    (goto-char 102)
    (insert "...")
    (goto-char 64)
    (insert "......")
    (goto-char 67)
    (insert "...")
    (goto-char 95)
    (delete-char 19)
    (goto-char 37)
    (insert "..........")
    (goto-char 50)
    (widen)
    (narrow-to-region 67 96)
    (goto-char 88)
    (insert "..........")
    (goto-char 91)
    (insert ".............")
    (goto-char 70)
    (delete-char 8)
    (goto-char 111)
    (widen)
    (narrow-to-region 72 103)
    (goto-char 101)
    (insert "...............")
    (should
     (equal
      (test-overlay-regions)
      '((4 . 119)
        (4 . 119)
        (4 . 162)
        (35 . 162)
        (51 . 78)
        (53 . 162)
        (55 . 78)
        (79 . 162))))))

(ert-deftest overlay-autogenerated-test-19 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 19 31 nil t t)
    (make-overlay 40 5 nil nil nil)
    (make-overlay 13 41 nil t t)
    (make-overlay 41 43 nil nil t)
    (make-overlay 7 60 nil t nil)
    (make-overlay 40 23 nil t nil)
    (make-overlay 32 15 nil t t)
    (make-overlay 12 45 nil nil nil)
    (make-overlay 18 1 nil nil nil)
    (make-overlay 58 32 nil t t)
    (make-overlay 30 3 nil t t)
    (make-overlay 43 61 nil t nil)
    (make-overlay 54 57 nil nil t)
    (make-overlay 34 14 nil t t)
    (make-overlay 26 49 nil nil t)
    (make-overlay 54 49 nil nil t)
    (goto-char 28)
    (insert "........")
    (goto-char 32)
    (insert "...........")
    (goto-char 78)
    (delete-char 6)
    (goto-char 37)
    (delete-char 0)
    (goto-char 49)
    (insert ".........")
    (goto-char 40)
    (widen)
    (narrow-to-region 8 30)
    (goto-char 20)
    (delete-char 4)
    (goto-char 23)
    (delete-char 1)
    (goto-char 10)
    (insert ".")
    (goto-char 22)
    (delete-char 2)
    (goto-char 22)
    (insert "......")
    (goto-char 17)
    (insert "..........")
    (goto-char 34)
    (delete-char 0)
    (goto-char 21)
    (insert "............")
    (goto-char 45)
    (delete-char 7)
    (goto-char 39)
    (insert "...............")
    (goto-char 29)
    (insert "........")
    (goto-char 9)
    (delete-char 3)
    (goto-char 63)
    (delete-char 1)
    (goto-char 33)
    (insert "........")
    (goto-char 16)
    (delete-char 36)
    (goto-char 20)
    (delete-char 2)
    (goto-char 28)
    (delete-char 0)
    (goto-char 24)
    (insert "...........")
    (goto-char 43)
    (insert "..........")
    (goto-char 30)
    (delete-char 1)
    (goto-char 40)
    (delete-char 13)
    (goto-char 22)
    (delete-char 19)
    (goto-char 10)
    (delete-char 8)
    (goto-char 14)
    (delete-char 0)
    (goto-char 12)
    (delete-char 2)
    (goto-char 11)
    (delete-char 0)
    (should
     (equal
      (test-overlay-regions)
      '((1 . 12)
        (3 . 40)
        (5 . 50)
        (7 . 69)
        (10 . 42)
        (10 . 44)
        (10 . 51)
        (10 . 55))))))

(ert-deftest overlay-autogenerated-test-20 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 44 42 nil t t)
    (make-overlay 47 1 nil nil nil)
    (make-overlay 24 48 nil nil nil)
    (make-overlay 62 50 nil nil t)
    (make-overlay 54 38 nil nil nil)
    (make-overlay 3 9 nil nil nil)
    (make-overlay 61 28 nil t nil)
    (make-overlay 33 33 nil nil t)
    (make-overlay 37 37 nil t nil)
    (make-overlay 20 13 nil nil t)
    (make-overlay 54 36 nil t nil)
    (make-overlay 18 58 nil nil t)
    (make-overlay 55 3 nil nil t)
    (make-overlay 23 21 nil t t)
    (make-overlay 47 55 nil t t)
    (make-overlay 50 12 nil nil nil)
    (goto-char 11)
    (delete-char 46)
    (goto-char 7)
    (delete-char 3)
    (goto-char 14)
    (delete-char 1)
    (goto-char 14)
    (insert "......")
    (goto-char 14)
    (delete-char 4)
    (goto-char 12)
    (widen)
    (narrow-to-region 11 12)
    (goto-char 11)
    (insert "...")
    (goto-char 13)
    (delete-char 1)
    (goto-char 14)
    (insert ".")
    (goto-char 13)
    (delete-char 2)
    (goto-char 11)
    (delete-char 2)
    (goto-char 11)
    (insert "")
    (goto-char 11)
    (delete-char 0)
    (goto-char 11)
    (delete-char 0)
    (goto-char 11)
    (delete-char 0)
    (goto-char 11)
    (insert ".")
    (goto-char 11)
    (insert ".")
    (goto-char 12)
    (insert "......")
    (goto-char 14)
    (delete-char 2)
    (goto-char 11)
    (delete-char 2)
    (goto-char 14)
    (insert "............")
    (goto-char 19)
    (insert "..............")
    (goto-char 29)
    (insert ".....")
    (goto-char 42)
    (delete-char 1)
    (goto-char 22)
    (insert ".....")
    (goto-char 19)
    (insert "..............")
    (goto-char 42)
    (insert ".....")
    (goto-char 63)
    (widen)
    (narrow-to-region 26 42)
    (goto-char 36)
    (insert "..........")
    (goto-char 40)
    (delete-char 11)
    (goto-char 26)
    (delete-char 13)
    (goto-char 28)
    (delete-char 0)
    (should
     (equal
      (test-overlay-regions)
      '((8 . 56))))))

(ert-deftest overlay-autogenerated-test-21 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 65 15 nil nil nil)
    (make-overlay 52 31 nil nil nil)
    (make-overlay 12 51 nil t t)
    (make-overlay 42 20 nil nil t)
    (make-overlay 51 48 nil nil nil)
    (make-overlay 59 28 nil t t)
    (make-overlay 51 53 nil t nil)
    (make-overlay 50 59 nil nil t)
    (make-overlay 24 40 nil t nil)
    (make-overlay 51 61 nil nil nil)
    (make-overlay 12 58 nil nil t)
    (make-overlay 64 17 nil t t)
    (make-overlay 26 38 nil t t)
    (make-overlay 23 36 nil nil nil)
    (make-overlay 57 50 nil nil nil)
    (make-overlay 42 15 nil nil t)
    (goto-char 14)
    (insert "............")
    (goto-char 37)
    (insert ".")
    (goto-char 73)
    (insert "..........")
    (goto-char 17)
    (delete-char 31)
    (goto-char 21)
    (delete-char 35)
    (goto-char 9)
    (delete-char 0)
    (goto-char 7)
    (delete-char 2)
    (goto-char 1)
    (insert "")
    (goto-char 5)
    (insert ".......")
    (goto-char 8)
    (insert "....")
    (goto-char 27)
    (delete-char 0)
    (goto-char 10)
    (insert ".............")
    (goto-char 24)
    (delete-char 16)
    (goto-char 14)
    (insert ".............")
    (goto-char 25)
    (delete-char 11)
    (goto-char 3)
    (insert "........")
    (goto-char 38)
    (insert "............")
    (goto-char 41)
    (insert "..............")
    (goto-char 56)
    (delete-char 3)
    (goto-char 15)
    (widen)
    (narrow-to-region 16 53)
    (goto-char 19)
    (widen)
    (narrow-to-region 18 33)
    (goto-char 32)
    (insert "......")
    (goto-char 38)
    (delete-char 1)
    (goto-char 19)
    (widen)
    (narrow-to-region 11 11)
    (goto-char 11)
    (insert ".........")
    (goto-char 11)
    (insert ".........")
    (goto-char 20)
    (widen)
    (narrow-to-region 22 69)
    (goto-char 49)
    (insert ".........")
    (goto-char 54)
    (delete-char 22)
    (goto-char 44)
    (insert "........")
    (goto-char 40)
    (delete-char 7)
    (goto-char 29)
    (delete-char 22)
    (should
     (equal
      (test-overlay-regions)
      '((33 . 33)
        (33 . 33)
        (33 . 33)
        (33 . 33)
        (33 . 33)
        (33 . 33)
        (33 . 33)
        (33 . 33)
        (33 . 33)
        (33 . 33)
        (33 . 33)
        (33 . 33)
        (33 . 33)
        (33 . 33)
        (33 . 33)
        (33 . 33))))))

(ert-deftest overlay-autogenerated-test-22 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 12 14 nil nil t)
    (make-overlay 54 7 nil nil t)
    (make-overlay 8 3 nil nil nil)
    (make-overlay 42 32 nil nil nil)
    (make-overlay 10 27 nil t t)
    (make-overlay 50 28 nil t t)
    (make-overlay 39 35 nil nil nil)
    (make-overlay 12 4 nil t t)
    (make-overlay 29 54 nil nil nil)
    (make-overlay 14 52 nil t t)
    (make-overlay 9 15 nil t nil)
    (make-overlay 44 11 nil nil nil)
    (make-overlay 46 29 nil t t)
    (make-overlay 40 58 nil t t)
    (make-overlay 40 61 nil t nil)
    (make-overlay 13 59 nil nil t)
    (goto-char 32)
    (insert ".............")
    (goto-char 25)
    (delete-char 10)
    (goto-char 3)
    (insert ".............")
    (goto-char 33)
    (delete-char 32)
    (goto-char 39)
    (widen)
    (narrow-to-region 41 46)
    (goto-char 43)
    (delete-char 2)
    (goto-char 42)
    (delete-char 2)
    (goto-char 42)
    (insert "...")
    (goto-char 43)
    (delete-char 1)
    (goto-char 42)
    (widen)
    (narrow-to-region 8 46)
    (goto-char 25)
    (delete-char 7)
    (goto-char 12)
    (delete-char 10)
    (goto-char 23)
    (insert "...............")
    (goto-char 41)
    (delete-char 3)
    (goto-char 17)
    (insert ".........")
    (goto-char 37)
    (insert "...............")
    (goto-char 53)
    (delete-char 7)
    (goto-char 53)
    (delete-char 0)
    (goto-char 42)
    (widen)
    (narrow-to-region 20 54)
    (goto-char 20)
    (delete-char 28)
    (goto-char 23)
    (insert "..........")
    (goto-char 30)
    (insert "......")
    (goto-char 26)
    (delete-char 1)
    (goto-char 27)
    (widen)
    (narrow-to-region 40 37)
    (goto-char 37)
    (insert ".....")
    (goto-char 41)
    (widen)
    (narrow-to-region 13 37)
    (goto-char 29)
    (insert "...........")
    (goto-char 33)
    (delete-char 7)
    (goto-char 33)
    (delete-char 8)
    (goto-char 20)
    (insert "")
    (goto-char 23)
    (delete-char 7)
    (goto-char 14)
    (widen)
    (narrow-to-region 33 33)
    (should
     (equal
      (test-overlay-regions)
      '((15 . 39)
        (16 . 38)
        (16 . 39))))))

(ert-deftest overlay-autogenerated-test-23 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 51 32 nil t t)
    (make-overlay 13 61 nil t nil)
    (make-overlay 47 19 nil nil t)
    (make-overlay 11 30 nil nil nil)
    (make-overlay 50 26 nil t t)
    (make-overlay 64 13 nil t t)
    (make-overlay 29 8 nil t t)
    (make-overlay 25 42 nil t t)
    (make-overlay 33 28 nil t t)
    (make-overlay 54 7 nil nil nil)
    (make-overlay 30 59 nil nil nil)
    (make-overlay 65 50 nil t t)
    (make-overlay 64 15 nil t nil)
    (make-overlay 16 35 nil nil nil)
    (make-overlay 40 36 nil nil t)
    (make-overlay 31 35 nil t nil)
    (goto-char 61)
    (insert "......")
    (goto-char 55)
    (delete-char 2)
    (goto-char 20)
    (insert "..............")
    (goto-char 56)
    (insert "............")
    (goto-char 48)
    (delete-char 6)
    (goto-char 9)
    (delete-char 54)
    (goto-char 20)
    (delete-char 2)
    (goto-char 16)
    (delete-char 12)
    (goto-char 18)
    (insert ".............")
    (goto-char 24)
    (delete-char 7)
    (goto-char 5)
    (delete-char 2)
    (goto-char 1)
    (insert ".......")
    (goto-char 1)
    (insert ".......")
    (goto-char 33)
    (insert "")
    (goto-char 4)
    (insert "..")
    (goto-char 5)
    (widen)
    (narrow-to-region 17 4)
    (goto-char 13)
    (insert ".")
    (goto-char 8)
    (insert "............")
    (goto-char 9)
    (delete-char 3)
    (goto-char 4)
    (widen)
    (narrow-to-region 32 32)
    (goto-char 32)
    (delete-char 0)
    (goto-char 32)
    (delete-char 0)
    (goto-char 32)
    (delete-char 0)
    (goto-char 32)
    (insert "...............")
    (goto-char 43)
    (delete-char 4)
    (goto-char 32)
    (delete-char 1)
    (goto-char 40)
    (widen)
    (narrow-to-region 33 19)
    (goto-char 27)
    (insert "........")
    (goto-char 38)
    (delete-char 2)
    (goto-char 26)
    (insert "")
    (goto-char 33)
    (delete-char 1)
    (goto-char 27)
    (insert ".")
    (should
     (equal
      (test-overlay-regions)
      '((38 . 56))))))

(ert-deftest overlay-autogenerated-test-24 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 63 8 nil t t)
    (make-overlay 10 13 nil nil t)
    (make-overlay 40 38 nil nil nil)
    (make-overlay 21 34 nil t t)
    (make-overlay 55 29 nil nil nil)
    (make-overlay 36 65 nil t t)
    (make-overlay 29 12 nil t nil)
    (make-overlay 41 3 nil nil t)
    (make-overlay 20 9 nil t t)
    (make-overlay 52 42 nil t t)
    (make-overlay 21 56 nil nil t)
    (make-overlay 25 65 nil nil nil)
    (make-overlay 38 4 nil t t)
    (make-overlay 48 23 nil t t)
    (make-overlay 52 9 nil nil t)
    (make-overlay 48 19 nil nil nil)
    (goto-char 43)
    (delete-char 8)
    (goto-char 30)
    (delete-char 16)
    (goto-char 7)
    (insert "...")
    (goto-char 14)
    (delete-char 5)
    (goto-char 36)
    (delete-char 0)
    (goto-char 9)
    (insert "...............")
    (goto-char 13)
    (delete-char 17)
    (goto-char 16)
    (delete-char 2)
    (goto-char 9)
    (insert "")
    (goto-char 11)
    (delete-char 5)
    (goto-char 18)
    (insert "........")
    (goto-char 15)
    (insert "....")
    (goto-char 16)
    (delete-char 14)
    (goto-char 20)
    (insert ".")
    (goto-char 25)
    (delete-char 1)
    (goto-char 14)
    (delete-char 14)
    (goto-char 3)
    (delete-char 7)
    (goto-char 3)
    (delete-char 4)
    (goto-char 1)
    (insert "...........")
    (goto-char 9)
    (insert ".......")
    (goto-char 5)
    (delete-char 7)
    (goto-char 12)
    (insert ".........")
    (goto-char 2)
    (delete-char 4)
    (goto-char 3)
    (widen)
    (narrow-to-region 14 6)
    (goto-char 9)
    (insert "..........")
    (goto-char 13)
    (delete-char 8)
    (goto-char 7)
    (delete-char 7)
    (goto-char 7)
    (insert "..")
    (goto-char 9)
    (insert ".............")
    (goto-char 9)
    (insert "..........")
    (goto-char 21)
    (insert "...............")
    (goto-char 42)
    (insert ".........")
    (should
     (equal
      (test-overlay-regions)
      'nil))))

(ert-deftest overlay-autogenerated-test-25 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 24 8 nil nil t)
    (make-overlay 41 16 nil t nil)
    (make-overlay 3 16 nil nil nil)
    (make-overlay 26 42 nil nil nil)
    (make-overlay 32 45 nil nil t)
    (make-overlay 34 19 nil nil nil)
    (make-overlay 37 54 nil nil t)
    (make-overlay 44 34 nil t nil)
    (make-overlay 49 40 nil t t)
    (make-overlay 29 34 nil t nil)
    (make-overlay 54 16 nil t t)
    (make-overlay 29 4 nil t nil)
    (make-overlay 44 57 nil nil nil)
    (make-overlay 5 32 nil nil nil)
    (make-overlay 12 33 nil nil t)
    (make-overlay 38 29 nil t nil)
    (goto-char 12)
    (delete-char 53)
    (goto-char 1)
    (delete-char 6)
    (goto-char 5)
    (widen)
    (narrow-to-region 6 1)
    (goto-char 6)
    (insert "......")
    (goto-char 10)
    (insert "...............")
    (goto-char 17)
    (delete-char 5)
    (goto-char 7)
    (insert ".....")
    (goto-char 8)
    (insert "...............")
    (goto-char 4)
    (insert ".....")
    (goto-char 44)
    (widen)
    (narrow-to-region 18 11)
    (goto-char 15)
    (delete-char 1)
    (goto-char 17)
    (delete-char 0)
    (goto-char 13)
    (delete-char 3)
    (goto-char 14)
    (insert "..")
    (goto-char 16)
    (insert "..")
    (goto-char 15)
    (delete-char 3)
    (goto-char 13)
    (delete-char 0)
    (goto-char 14)
    (insert "..........")
    (goto-char 19)
    (insert ".")
    (goto-char 23)
    (delete-char 1)
    (goto-char 12)
    (widen)
    (narrow-to-region 23 40)
    (goto-char 35)
    (insert "....")
    (goto-char 33)
    (insert "..........")
    (goto-char 37)
    (delete-char 16)
    (goto-char 37)
    (delete-char 0)
    (goto-char 23)
    (widen)
    (narrow-to-region 30 8)
    (goto-char 29)
    (delete-char 0)
    (goto-char 15)
    (delete-char 15)
    (goto-char 9)
    (insert "...........")
    (goto-char 9)
    (delete-char 1)
    (goto-char 22)
    (delete-char 3)
    (goto-char 10)
    (insert ".........")
    (should
     (equal
      (test-overlay-regions)
      '((1 . 30)
        (1 . 30)
        (1 . 30)
        (2 . 53)
        (30 . 30)
        (30 . 30)
        (30 . 30)
        (30 . 30)
        (30 . 30)
        (30 . 30)
        (30 . 30)
        (30 . 53)
        (30 . 53)
        (30 . 53))))))

(ert-deftest overlay-autogenerated-test-26 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 60 59 nil t nil)
    (make-overlay 18 11 nil nil t)
    (make-overlay 4 44 nil nil nil)
    (make-overlay 7 22 nil nil nil)
    (make-overlay 54 50 nil t nil)
    (make-overlay 59 28 nil nil nil)
    (make-overlay 49 23 nil nil t)
    (make-overlay 21 5 nil t nil)
    (make-overlay 17 39 nil t nil)
    (make-overlay 16 14 nil nil nil)
    (make-overlay 50 26 nil nil nil)
    (make-overlay 37 14 nil nil nil)
    (make-overlay 6 59 nil nil t)
    (make-overlay 30 17 nil nil t)
    (make-overlay 17 34 nil nil t)
    (make-overlay 7 22 nil t nil)
    (goto-char 35)
    (delete-char 25)
    (goto-char 30)
    (delete-char 7)
    (goto-char 25)
    (widen)
    (narrow-to-region 3 19)
    (goto-char 6)
    (insert ".........")
    (goto-char 21)
    (insert "...............")
    (goto-char 12)
    (insert ".............")
    (goto-char 34)
    (widen)
    (narrow-to-region 64 37)
    (goto-char 62)
    (insert ".............")
    (goto-char 50)
    (widen)
    (narrow-to-region 72 38)
    (goto-char 66)
    (insert "")
    (goto-char 54)
    (insert "...")
    (goto-char 70)
    (delete-char 4)
    (goto-char 49)
    (delete-char 13)
    (goto-char 38)
    (insert "....")
    (goto-char 46)
    (insert ".")
    (goto-char 43)
    (widen)
    (narrow-to-region 74 53)
    (goto-char 60)
    (delete-char 10)
    (goto-char 53)
    (insert "..............")
    (goto-char 72)
    (insert "............")
    (goto-char 87)
    (delete-char 2)
    (goto-char 73)
    (insert "............")
    (goto-char 81)
    (insert "........")
    (goto-char 106)
    (insert "...")
    (goto-char 95)
    (widen)
    (narrow-to-region 77 39)
    (goto-char 43)
    (insert "..........")
    (goto-char 40)
    (insert "...............")
    (goto-char 101)
    (insert "")
    (goto-char 53)
    (insert "....")
    (goto-char 79)
    (delete-char 21)
    (goto-char 85)
    (insert "........")
    (goto-char 52)
    (delete-char 41)
    (goto-char 43)
    (insert ".....")
    (should
     (equal
      (test-overlay-regions)
      '((4 . 90)
        (5 . 57)
        (6 . 90)
        (29 . 57)
        (29 . 57)
        (33 . 57))))))

(ert-deftest overlay-autogenerated-test-27 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 20 12 nil t nil)
    (make-overlay 3 10 nil t t)
    (make-overlay 11 53 nil t nil)
    (make-overlay 59 3 nil t nil)
    (make-overlay 28 19 nil t t)
    (make-overlay 16 30 nil t t)
    (make-overlay 39 19 nil t t)
    (make-overlay 33 50 nil t nil)
    (make-overlay 36 54 nil nil nil)
    (make-overlay 42 59 nil nil nil)
    (make-overlay 30 48 nil t nil)
    (make-overlay 20 13 nil nil t)
    (make-overlay 63 48 nil t nil)
    (make-overlay 48 12 nil t t)
    (make-overlay 64 50 nil nil nil)
    (make-overlay 7 7 nil nil nil)
    (goto-char 20)
    (widen)
    (narrow-to-region 21 54)
    (goto-char 40)
    (insert "..........")
    (goto-char 21)
    (delete-char 2)
    (goto-char 35)
    (widen)
    (narrow-to-region 70 11)
    (goto-char 45)
    (insert "...............")
    (goto-char 74)
    (insert ".")
    (goto-char 28)
    (widen)
    (narrow-to-region 77 67)
    (goto-char 72)
    (insert "..........")
    (goto-char 85)
    (delete-char 1)
    (goto-char 82)
    (widen)
    (narrow-to-region 83 86)
    (goto-char 83)
    (delete-char 0)
    (goto-char 86)
    (delete-char 0)
    (goto-char 86)
    (insert "...........")
    (goto-char 97)
    (insert ".......")
    (goto-char 103)
    (widen)
    (narrow-to-region 44 68)
    (goto-char 49)
    (insert "..")
    (goto-char 65)
    (insert ".............")
    (goto-char 59)
    (delete-char 0)
    (goto-char 57)
    (insert "........")
    (goto-char 55)
    (delete-char 30)
    (goto-char 45)
    (insert "...............")
    (goto-char 44)
    (insert "")
    (goto-char 62)
    (insert "............")
    (goto-char 63)
    (widen)
    (narrow-to-region 12 5)
    (goto-char 8)
    (delete-char 4)
    (goto-char 6)
    (delete-char 0)
    (goto-char 7)
    (insert "..........")
    (goto-char 15)
    (delete-char 0)
    (goto-char 16)
    (insert "............")
    (goto-char 20)
    (insert ".........")
    (goto-char 13)
    (insert "..")
    (goto-char 32)
    (insert "..............")
    (should
     (equal
      (test-overlay-regions)
      '((3 . 55)
        (3 . 173)
        (7 . 7))))))

(ert-deftest overlay-autogenerated-test-28 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 59 48 nil t nil)
    (make-overlay 59 4 nil nil t)
    (make-overlay 45 35 nil t nil)
    (make-overlay 13 18 nil t t)
    (make-overlay 10 7 nil t t)
    (make-overlay 9 8 nil nil nil)
    (make-overlay 33 47 nil nil t)
    (make-overlay 1 57 nil t nil)
    (make-overlay 16 59 nil nil t)
    (make-overlay 43 58 nil nil t)
    (make-overlay 6 11 nil nil nil)
    (make-overlay 59 7 nil t nil)
    (make-overlay 3 57 nil t t)
    (make-overlay 61 35 nil nil nil)
    (make-overlay 57 8 nil nil nil)
    (make-overlay 5 32 nil t nil)
    (goto-char 18)
    (insert "............")
    (goto-char 43)
    (delete-char 2)
    (goto-char 38)
    (delete-char 26)
    (goto-char 42)
    (insert ".....")
    (goto-char 52)
    (insert "..........")
    (goto-char 45)
    (delete-char 11)
    (goto-char 33)
    (insert "....")
    (goto-char 23)
    (delete-char 14)
    (goto-char 33)
    (widen)
    (narrow-to-region 30 33)
    (goto-char 30)
    (delete-char 0)
    (goto-char 30)
    (insert "...........")
    (goto-char 30)
    (delete-char 7)
    (goto-char 30)
    (insert ".")
    (goto-char 32)
    (delete-char 4)
    (goto-char 34)
    (delete-char 0)
    (goto-char 34)
    (delete-char 0)
    (goto-char 32)
    (insert "...............")
    (goto-char 46)
    (insert ".........")
    (goto-char 45)
    (delete-char 3)
    (goto-char 49)
    (delete-char 2)
    (goto-char 42)
    (delete-char 2)
    (goto-char 32)
    (insert "..........")
    (goto-char 47)
    (insert "....")
    (goto-char 59)
    (insert ".......")
    (goto-char 35)
    (insert ".")
    (goto-char 45)
    (insert "..............")
    (goto-char 37)
    (insert "..")
    (goto-char 80)
    (insert ".....")
    (goto-char 30)
    (insert ".............")
    (goto-char 102)
    (insert "............")
    (goto-char 113)
    (insert "")
    (goto-char 66)
    (widen)
    (narrow-to-region 47 38)
    (should
     (equal
      (test-overlay-regions)
      '((1 . 45)
        (3 . 117)
        (4 . 121)
        (7 . 121)
        (8 . 45)
        (16 . 121)
        (28 . 121)
        (28 . 121)
        (28 . 121))))))

(ert-deftest overlay-autogenerated-test-29 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 5 63 nil nil t)
    (make-overlay 20 28 nil t t)
    (make-overlay 58 53 nil t nil)
    (make-overlay 4 57 nil t t)
    (make-overlay 4 16 nil nil nil)
    (make-overlay 33 26 nil t nil)
    (make-overlay 9 32 nil t t)
    (make-overlay 11 8 nil nil nil)
    (make-overlay 59 35 nil nil t)
    (make-overlay 15 25 nil t t)
    (make-overlay 36 16 nil nil nil)
    (make-overlay 8 37 nil nil nil)
    (make-overlay 65 63 nil nil t)
    (make-overlay 3 20 nil nil t)
    (make-overlay 44 55 nil t t)
    (make-overlay 45 25 nil t nil)
    (goto-char 39)
    (insert "...")
    (goto-char 22)
    (insert "........")
    (goto-char 60)
    (insert ".........")
    (goto-char 17)
    (insert "............")
    (goto-char 13)
    (widen)
    (narrow-to-region 79 16)
    (goto-char 19)
    (delete-char 11)
    (goto-char 25)
    (insert "........")
    (goto-char 61)
    (insert "....")
    (goto-char 45)
    (widen)
    (narrow-to-region 73 66)
    (goto-char 71)
    (insert "............")
    (goto-char 81)
    (delete-char 2)
    (goto-char 73)
    (insert "..........")
    (goto-char 74)
    (insert "............")
    (goto-char 82)
    (delete-char 7)
    (goto-char 78)
    (delete-char 18)
    (goto-char 75)
    (insert ".........")
    (goto-char 66)
    (insert ".........")
    (goto-char 86)
    (delete-char 12)
    (goto-char 77)
    (widen)
    (narrow-to-region 23 55)
    (goto-char 43)
    (insert ".")
    (goto-char 50)
    (insert "..")
    (goto-char 25)
    (delete-char 18)
    (goto-char 33)
    (delete-char 7)
    (goto-char 26)
    (insert "........")
    (goto-char 29)
    (insert "...........")
    (goto-char 33)
    (insert "...")
    (goto-char 40)
    (insert "..........")
    (goto-char 26)
    (insert "")
    (goto-char 35)
    (insert ".")
    (goto-char 59)
    (insert ".")
    (goto-char 51)
    (insert "..")
    (goto-char 59)
    (insert ".............")
    (should
     (equal
      (test-overlay-regions)
      '((4 . 130)
        (5 . 136)
        (8 . 82)
        (9 . 82)
        (15 . 25)
        (16 . 82)
        (21 . 77)
        (25 . 105)
        (75 . 82))))))

(ert-deftest overlay-autogenerated-test-30 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 27 65 nil t t)
    (make-overlay 39 51 nil t t)
    (make-overlay 53 2 nil nil nil)
    (make-overlay 3 17 nil nil t)
    (make-overlay 35 4 nil nil t)
    (make-overlay 65 53 nil t nil)
    (make-overlay 8 21 nil t t)
    (make-overlay 18 62 nil t t)
    (make-overlay 42 59 nil nil t)
    (make-overlay 12 37 nil t t)
    (make-overlay 64 31 nil t nil)
    (make-overlay 39 54 nil nil t)
    (make-overlay 41 24 nil t nil)
    (make-overlay 10 21 nil nil t)
    (make-overlay 49 15 nil t nil)
    (make-overlay 49 63 nil nil t)
    (goto-char 43)
    (insert "..........")
    (goto-char 44)
    (delete-char 29)
    (goto-char 32)
    (insert "..")
    (goto-char 13)
    (insert ".")
    (goto-char 42)
    (insert ".........")
    (goto-char 39)
    (insert "..........")
    (goto-char 15)
    (insert "............")
    (goto-char 58)
    (delete-char 9)
    (goto-char 63)
    (insert ".........")
    (goto-char 49)
    (insert ".")
    (goto-char 28)
    (delete-char 51)
    (goto-char 12)
    (delete-char 6)
    (goto-char 20)
    (delete-char 2)
    (goto-char 7)
    (widen)
    (narrow-to-region 2 9)
    (goto-char 5)
    (insert "...............")
    (goto-char 18)
    (delete-char 1)
    (goto-char 4)
    (insert ".............")
    (goto-char 13)
    (delete-char 22)
    (goto-char 12)
    (insert "")
    (goto-char 3)
    (insert ".............")
    (goto-char 22)
    (insert "...............")
    (goto-char 9)
    (insert "....")
    (goto-char 8)
    (insert "...........")
    (goto-char 6)
    (delete-char 34)
    (goto-char 21)
    (insert "....")
    (goto-char 14)
    (insert ".....")
    (goto-char 20)
    (insert ".......")
    (goto-char 34)
    (widen)
    (narrow-to-region 3 2)
    (goto-char 3)
    (delete-char 0)
    (goto-char 2)
    (insert "..............")
    (goto-char 15)
    (delete-char 2)
    (goto-char 11)
    (insert "......")
    (should
     (equal
      (test-overlay-regions)
      '((2 . 68))))))

(ert-deftest overlay-autogenerated-test-31 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 54 64 nil nil nil)
    (make-overlay 49 12 nil nil t)
    (make-overlay 40 12 nil t nil)
    (make-overlay 17 38 nil nil nil)
    (make-overlay 21 36 nil t t)
    (make-overlay 8 38 nil t nil)
    (make-overlay 50 22 nil t nil)
    (make-overlay 65 15 nil nil t)
    (make-overlay 57 60 nil t t)
    (make-overlay 35 11 nil nil t)
    (make-overlay 49 44 nil nil t)
    (make-overlay 45 31 nil nil t)
    (make-overlay 51 24 nil t t)
    (make-overlay 20 14 nil nil nil)
    (make-overlay 6 18 nil t t)
    (make-overlay 25 3 nil nil nil)
    (goto-char 18)
    (delete-char 10)
    (goto-char 36)
    (delete-char 13)
    (goto-char 8)
    (delete-char 4)
    (goto-char 2)
    (delete-char 8)
    (goto-char 12)
    (delete-char 10)
    (goto-char 15)
    (delete-char 4)
    (goto-char 16)
    (insert ".........")
    (goto-char 17)
    (insert "...............")
    (goto-char 33)
    (delete-char 0)
    (goto-char 38)
    (delete-char 0)
    (goto-char 11)
    (insert "...........")
    (goto-char 8)
    (delete-char 14)
    (goto-char 32)
    (insert "........")
    (goto-char 40)
    (widen)
    (narrow-to-region 14 6)
    (goto-char 10)
    (delete-char 1)
    (goto-char 7)
    (widen)
    (narrow-to-region 18 39)
    (goto-char 36)
    (delete-char 1)
    (goto-char 34)
    (widen)
    (narrow-to-region 39 14)
    (goto-char 22)
    (widen)
    (narrow-to-region 25 21)
    (goto-char 23)
    (delete-char 2)
    (goto-char 23)
    (delete-char 0)
    (goto-char 23)
    (insert ".........")
    (goto-char 32)
    (delete-char 0)
    (goto-char 31)
    (insert ".........")
    (goto-char 32)
    (insert "...")
    (goto-char 30)
    (widen)
    (narrow-to-region 10 56)
    (goto-char 10)
    (insert ".........")
    (goto-char 38)
    (insert ".........")
    (goto-char 19)
    (insert "..")
    (goto-char 11)
    (insert "..............")
    (goto-char 66)
    (insert "...............")
    (goto-char 13)
    (insert "......")
    (should
     (equal
      (test-overlay-regions)
      '((2 . 41)
        (3 . 117)
        (6 . 41)
        (8 . 41)
        (9 . 41)
        (10 . 42)
        (41 . 42))))))

(ert-deftest overlay-autogenerated-test-32 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 35 60 nil nil t)
    (make-overlay 45 46 nil nil nil)
    (make-overlay 47 11 nil nil t)
    (make-overlay 12 51 nil t nil)
    (make-overlay 61 17 nil t nil)
    (make-overlay 7 24 nil t nil)
    (make-overlay 36 37 nil nil t)
    (make-overlay 5 39 nil t t)
    (make-overlay 5 40 nil nil t)
    (make-overlay 38 40 nil t t)
    (make-overlay 47 45 nil t nil)
    (make-overlay 61 48 nil nil nil)
    (make-overlay 23 39 nil t t)
    (make-overlay 11 52 nil nil nil)
    (make-overlay 37 35 nil nil nil)
    (make-overlay 19 20 nil t nil)
    (goto-char 43)
    (insert "........")
    (goto-char 7)
    (insert "")
    (goto-char 28)
    (delete-char 41)
    (goto-char 3)
    (delete-char 17)
    (goto-char 2)
    (insert ".")
    (goto-char 7)
    (insert ".........")
    (goto-char 21)
    (delete-char 4)
    (goto-char 13)
    (delete-char 1)
    (goto-char 2)
    (insert "...............")
    (goto-char 7)
    (insert "")
    (goto-char 14)
    (insert ".....")
    (goto-char 16)
    (insert ".")
    (goto-char 10)
    (insert "..............")
    (goto-char 16)
    (delete-char 18)
    (goto-char 1)
    (delete-char 36)
    (goto-char 1)
    (delete-char 0)
    (goto-char 1)
    (delete-char 0)
    (goto-char 1)
    (insert ".............")
    (goto-char 9)
    (insert ".")
    (goto-char 14)
    (insert ".....")
    (goto-char 9)
    (delete-char 0)
    (goto-char 15)
    (delete-char 0)
    (goto-char 6)
    (delete-char 4)
    (goto-char 11)
    (delete-char 5)
    (goto-char 5)
    (insert "....")
    (goto-char 5)
    (insert ".....")
    (goto-char 12)
    (insert "")
    (goto-char 13)
    (insert ".......")
    (goto-char 14)
    (insert "......")
    (goto-char 9)
    (delete-char 3)
    (goto-char 17)
    (delete-char 0)
    (goto-char 7)
    (delete-char 12)
    (should
     (equal
      (test-overlay-regions)
      '((1 . 1)
        (1 . 1)
        (1 . 1)
        (1 . 1)
        (1 . 1)
        (1 . 1)
        (1 . 1)
        (1 . 1)
        (1 . 1)
        (1 . 18)
        (1 . 18)
        (1 . 18)
        (1 . 18)
        (18 . 18)
        (18 . 18)
        (18 . 18))))))

(ert-deftest overlay-autogenerated-test-33 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 65 33 nil t nil)
    (make-overlay 45 54 nil t t)
    (make-overlay 17 38 nil t nil)
    (make-overlay 58 46 nil nil t)
    (make-overlay 21 36 nil t t)
    (make-overlay 31 63 nil nil t)
    (make-overlay 37 64 nil t t)
    (make-overlay 42 19 nil nil nil)
    (make-overlay 51 60 nil t nil)
    (make-overlay 47 15 nil t t)
    (make-overlay 57 47 nil nil nil)
    (make-overlay 40 45 nil nil nil)
    (make-overlay 44 47 nil t nil)
    (make-overlay 42 35 nil t nil)
    (make-overlay 1 65 nil nil t)
    (make-overlay 29 63 nil t nil)
    (goto-char 33)
    (insert "...........")
    (goto-char 56)
    (insert ".........")
    (goto-char 67)
    (insert "....")
    (goto-char 28)
    (delete-char 35)
    (goto-char 9)
    (insert "......")
    (goto-char 43)
    (delete-char 17)
    (goto-char 29)
    (insert ".......")
    (goto-char 20)
    (insert "....")
    (goto-char 53)
    (insert ".......")
    (goto-char 14)
    (widen)
    (narrow-to-region 38 57)
    (goto-char 51)
    (insert "")
    (goto-char 57)
    (insert ".......")
    (goto-char 64)
    (insert ".....")
    (goto-char 59)
    (delete-char 3)
    (goto-char 45)
    (delete-char 12)
    (goto-char 43)
    (insert "......")
    (goto-char 48)
    (insert "......")
    (goto-char 52)
    (insert "........")
    (goto-char 57)
    (delete-char 16)
    (goto-char 43)
    (delete-char 9)
    (goto-char 40)
    (insert "")
    (goto-char 39)
    (insert "..........")
    (goto-char 50)
    (widen)
    (narrow-to-region 31 27)
    (goto-char 27)
    (insert "..........")
    (goto-char 33)
    (delete-char 0)
    (goto-char 37)
    (insert "..")
    (goto-char 38)
    (delete-char 4)
    (goto-char 38)
    (insert "..........")
    (goto-char 45)
    (insert ".....")
    (goto-char 53)
    (insert "...")
    (goto-char 51)
    (insert ".")
    (goto-char 28)
    (insert "...")
    (should
     (equal
      (test-overlay-regions)
      '((1 . 93)
        (25 . 92)
        (41 . 88)
        (60 . 88))))))

(ert-deftest overlay-autogenerated-test-34 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 2 63 nil nil t)
    (make-overlay 54 30 nil t nil)
    (make-overlay 21 57 nil t nil)
    (make-overlay 61 19 nil nil nil)
    (make-overlay 55 8 nil nil t)
    (make-overlay 14 51 nil nil nil)
    (make-overlay 33 13 nil t t)
    (make-overlay 36 25 nil t t)
    (make-overlay 22 21 nil nil t)
    (make-overlay 21 48 nil nil t)
    (make-overlay 36 7 nil nil t)
    (make-overlay 2 40 nil nil nil)
    (make-overlay 21 27 nil nil t)
    (make-overlay 26 2 nil nil nil)
    (make-overlay 60 43 nil nil nil)
    (make-overlay 12 50 nil t t)
    (goto-char 44)
    (delete-char 6)
    (goto-char 5)
    (insert "..")
    (goto-char 17)
    (insert "........")
    (goto-char 48)
    (insert "..")
    (goto-char 27)
    (delete-char 29)
    (goto-char 10)
    (delete-char 2)
    (goto-char 35)
    (insert ".............")
    (goto-char 20)
    (delete-char 0)
    (goto-char 6)
    (insert ".")
    (goto-char 9)
    (delete-char 6)
    (goto-char 38)
    (insert ".........")
    (goto-char 5)
    (insert ".........")
    (goto-char 10)
    (delete-char 20)
    (goto-char 6)
    (delete-char 6)
    (goto-char 14)
    (insert ".............")
    (goto-char 31)
    (delete-char 10)
    (goto-char 20)
    (widen)
    (narrow-to-region 27 39)
    (goto-char 34)
    (delete-char 5)
    (goto-char 32)
    (delete-char 1)
    (goto-char 27)
    (insert "..")
    (goto-char 28)
    (insert "........")
    (goto-char 39)
    (insert "........")
    (goto-char 38)
    (delete-char 7)
    (goto-char 44)
    (delete-char 0)
    (goto-char 30)
    (insert "...............")
    (goto-char 43)
    (insert "............")
    (goto-char 56)
    (delete-char 1)
    (goto-char 65)
    (delete-char 3)
    (goto-char 36)
    (insert ".........")
    (goto-char 74)
    (insert ".....")
    (goto-char 67)
    (delete-char 5)
    (goto-char 38)
    (insert "..")
    (should
     (equal
      (test-overlay-regions)
      '((2 . 80)
        (6 . 78))))))

(ert-deftest overlay-autogenerated-test-35 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 38 16 nil nil nil)
    (make-overlay 19 22 nil t nil)
    (make-overlay 16 43 nil nil t)
    (make-overlay 27 5 nil nil nil)
    (make-overlay 43 34 nil t nil)
    (make-overlay 47 4 nil nil t)
    (make-overlay 1 47 nil nil t)
    (make-overlay 27 35 nil t nil)
    (make-overlay 41 41 nil nil t)
    (make-overlay 21 19 nil nil nil)
    (make-overlay 16 38 nil nil t)
    (make-overlay 33 39 nil t nil)
    (make-overlay 34 51 nil nil t)
    (make-overlay 45 36 nil t nil)
    (make-overlay 42 18 nil t t)
    (make-overlay 12 30 nil nil nil)
    (goto-char 18)
    (insert "")
    (goto-char 58)
    (delete-char 3)
    (goto-char 58)
    (delete-char 0)
    (goto-char 1)
    (insert ".......")
    (goto-char 48)
    (delete-char 17)
    (goto-char 39)
    (delete-char 6)
    (goto-char 33)
    (widen)
    (narrow-to-region 45 46)
    (goto-char 46)
    (insert "")
    (goto-char 46)
    (delete-char 0)
    (goto-char 46)
    (insert ".....")
    (goto-char 51)
    (widen)
    (narrow-to-region 17 26)
    (goto-char 25)
    (widen)
    (narrow-to-region 50 41)
    (goto-char 45)
    (insert "..............")
    (goto-char 59)
    (insert "...........")
    (goto-char 47)
    (delete-char 9)
    (goto-char 59)
    (insert "")
    (goto-char 46)
    (insert "")
    (goto-char 54)
    (delete-char 5)
    (goto-char 57)
    (widen)
    (narrow-to-region 57 31)
    (goto-char 42)
    (delete-char 2)
    (goto-char 52)
    (insert "....")
    (goto-char 44)
    (insert "..")
    (goto-char 44)
    (insert "...............")
    (goto-char 72)
    (delete-char 1)
    (goto-char 66)
    (delete-char 6)
    (goto-char 64)
    (delete-char 5)
    (goto-char 49)
    (delete-char 12)
    (goto-char 32)
    (insert "......")
    (goto-char 44)
    (delete-char 2)
    (goto-char 39)
    (delete-char 12)
    (goto-char 42)
    (insert "......")
    (goto-char 36)
    (widen)
    (narrow-to-region 14 47)
    (should
     (equal
      (test-overlay-regions)
      '((1 . 39)
        (11 . 39)
        (12 . 39)
        (19 . 39)
        (23 . 39)
        (23 . 39)
        (23 . 39)
        (25 . 39)
        (26 . 28)
        (26 . 29)
        (39 . 39)
        (39 . 39)
        (39 . 39)
        (39 . 39)
        (39 . 39)
        (39 . 39))))))

(ert-deftest overlay-autogenerated-test-36 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 1 38 nil t t)
    (make-overlay 58 34 nil t nil)
    (make-overlay 6 33 nil nil t)
    (make-overlay 63 54 nil nil t)
    (make-overlay 54 54 nil t t)
    (make-overlay 21 61 nil nil nil)
    (make-overlay 64 55 nil nil t)
    (make-overlay 28 65 nil nil t)
    (make-overlay 32 51 nil t nil)
    (make-overlay 36 38 nil nil nil)
    (make-overlay 35 21 nil nil nil)
    (make-overlay 65 48 nil nil nil)
    (make-overlay 32 27 nil nil t)
    (make-overlay 27 55 nil t t)
    (make-overlay 30 22 nil t nil)
    (make-overlay 14 58 nil t nil)
    (goto-char 40)
    (delete-char 7)
    (goto-char 42)
    (insert "......")
    (goto-char 11)
    (widen)
    (narrow-to-region 64 9)
    (goto-char 21)
    (delete-char 23)
    (goto-char 24)
    (insert "...")
    (goto-char 13)
    (insert "..........")
    (goto-char 12)
    (delete-char 5)
    (goto-char 10)
    (delete-char 0)
    (goto-char 21)
    (widen)
    (narrow-to-region 9 5)
    (goto-char 6)
    (delete-char 0)
    (goto-char 9)
    (delete-char 0)
    (goto-char 9)
    (delete-char 0)
    (goto-char 7)
    (insert "............")
    (goto-char 9)
    (insert "...")
    (goto-char 18)
    (insert ".")
    (goto-char 23)
    (delete-char 1)
    (goto-char 9)
    (insert "....")
    (goto-char 6)
    (insert ".....")
    (goto-char 23)
    (widen)
    (narrow-to-region 28 1)
    (goto-char 6)
    (insert "...........")
    (goto-char 30)
    (delete-char 8)
    (goto-char 2)
    (insert ".")
    (goto-char 18)
    (insert "......")
    (goto-char 5)
    (delete-char 9)
    (goto-char 5)
    (delete-char 20)
    (goto-char 4)
    (delete-char 3)
    (goto-char 3)
    (delete-char 2)
    (goto-char 3)
    (delete-char 0)
    (goto-char 1)
    (insert "......")
    (goto-char 8)
    (widen)
    (narrow-to-region 39 2)
    (goto-char 13)
    (delete-char 12)
    (goto-char 24)
    (delete-char 0)
    (should
     (equal
      (test-overlay-regions)
      '((7 . 20)
        (9 . 20)
        (13 . 36)
        (20 . 20)
        (20 . 20)
        (20 . 20)
        (20 . 20)
        (20 . 29)
        (20 . 33)
        (20 . 36)
        (20 . 39)
        (20 . 43)
        (20 . 43))))))

(ert-deftest overlay-autogenerated-test-37 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 26 30 nil nil nil)
    (make-overlay 55 50 nil nil t)
    (make-overlay 43 54 nil nil t)
    (make-overlay 53 48 nil nil nil)
    (make-overlay 37 51 nil nil t)
    (make-overlay 15 30 nil nil nil)
    (make-overlay 2 24 nil t t)
    (make-overlay 56 61 nil t nil)
    (make-overlay 65 46 nil t nil)
    (make-overlay 28 47 nil t nil)
    (make-overlay 21 24 nil t t)
    (make-overlay 17 13 nil t t)
    (make-overlay 7 44 nil t nil)
    (make-overlay 28 63 nil nil nil)
    (make-overlay 22 16 nil t t)
    (make-overlay 26 44 nil t t)
    (goto-char 57)
    (delete-char 6)
    (goto-char 42)
    (insert ".....")
    (goto-char 63)
    (insert ".............")
    (goto-char 17)
    (insert "")
    (goto-char 57)
    (insert "...........")
    (goto-char 3)
    (delete-char 47)
    (goto-char 15)
    (insert ".............")
    (goto-char 28)
    (insert "")
    (goto-char 17)
    (delete-char 31)
    (goto-char 7)
    (delete-char 16)
    (goto-char 2)
    (insert "...........")
    (goto-char 2)
    (insert "..")
    (goto-char 18)
    (widen)
    (narrow-to-region 20 8)
    (goto-char 13)
    (widen)
    (narrow-to-region 12 10)
    (goto-char 10)
    (delete-char 1)
    (goto-char 11)
    (delete-char 0)
    (goto-char 10)
    (insert "...")
    (goto-char 11)
    (delete-char 0)
    (goto-char 13)
    (insert "..")
    (goto-char 16)
    (delete-char 0)
    (goto-char 10)
    (delete-char 2)
    (goto-char 11)
    (insert ".....")
    (goto-char 16)
    (widen)
    (narrow-to-region 6 13)
    (goto-char 10)
    (insert "..")
    (goto-char 6)
    (delete-char 6)
    (goto-char 8)
    (insert "...............")
    (goto-char 21)
    (delete-char 0)
    (goto-char 21)
    (widen)
    (narrow-to-region 36 11)
    (goto-char 12)
    (insert "...............")
    (goto-char 19)
    (insert ".......")
    (goto-char 56)
    (delete-char 2)
    (goto-char 42)
    (delete-char 11)
    (should
     (equal
      (test-overlay-regions)
      '((44 . 45))))))

(ert-deftest overlay-autogenerated-test-38 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 29 13 nil t t)
    (make-overlay 19 28 nil nil t)
    (make-overlay 47 33 nil nil nil)
    (make-overlay 8 44 nil t nil)
    (make-overlay 48 4 nil t nil)
    (make-overlay 8 20 nil t t)
    (make-overlay 38 31 nil nil t)
    (make-overlay 17 65 nil nil t)
    (make-overlay 49 31 nil nil nil)
    (make-overlay 39 19 nil nil t)
    (make-overlay 40 49 nil t t)
    (make-overlay 24 16 nil t t)
    (make-overlay 4 41 nil t nil)
    (make-overlay 61 42 nil t nil)
    (make-overlay 46 11 nil nil nil)
    (make-overlay 1 43 nil nil t)
    (goto-char 62)
    (delete-char 2)
    (goto-char 25)
    (widen)
    (narrow-to-region 30 38)
    (goto-char 37)
    (delete-char 1)
    (goto-char 37)
    (insert "...........")
    (goto-char 41)
    (delete-char 3)
    (goto-char 39)
    (delete-char 5)
    (goto-char 39)
    (widen)
    (narrow-to-region 31 9)
    (goto-char 11)
    (insert "..............")
    (goto-char 9)
    (widen)
    (narrow-to-region 62 30)
    (goto-char 32)
    (widen)
    (narrow-to-region 17 48)
    (goto-char 39)
    (delete-char 7)
    (goto-char 24)
    (delete-char 8)
    (goto-char 19)
    (insert "")
    (goto-char 25)
    (delete-char 5)
    (goto-char 28)
    (delete-char 0)
    (goto-char 22)
    (widen)
    (narrow-to-region 52 35)
    (goto-char 49)
    (delete-char 0)
    (goto-char 49)
    (delete-char 3)
    (goto-char 48)
    (insert "...........")
    (goto-char 37)
    (delete-char 23)
    (goto-char 36)
    (delete-char 0)
    (goto-char 35)
    (insert "....")
    (goto-char 35)
    (insert "..")
    (goto-char 39)
    (delete-char 4)
    (goto-char 39)
    (delete-char 0)
    (goto-char 36)
    (delete-char 3)
    (goto-char 36)
    (delete-char 0)
    (goto-char 36)
    (delete-char 0)
    (goto-char 36)
    (delete-char 0)
    (goto-char 36)
    (insert ".....")
    (goto-char 38)
    (delete-char 1)
    (goto-char 35)
    (delete-char 3)
    (should
     (equal
      (test-overlay-regions)
      '((1 . 37)
        (24 . 44)
        (25 . 37))))))

(ert-deftest overlay-autogenerated-test-39 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 15 49 nil t t)
    (make-overlay 27 20 nil t nil)
    (make-overlay 55 50 nil t nil)
    (make-overlay 17 5 nil t t)
    (make-overlay 26 56 nil nil t)
    (make-overlay 42 11 nil t t)
    (make-overlay 24 35 nil nil t)
    (make-overlay 47 45 nil t t)
    (make-overlay 37 12 nil nil t)
    (make-overlay 17 25 nil t nil)
    (make-overlay 32 53 nil nil nil)
    (make-overlay 20 34 nil nil t)
    (make-overlay 56 58 nil nil t)
    (make-overlay 42 31 nil nil t)
    (make-overlay 22 55 nil t t)
    (make-overlay 55 11 nil t nil)
    (goto-char 16)
    (insert ".............")
    (goto-char 30)
    (insert ".")
    (goto-char 12)
    (delete-char 56)
    (goto-char 9)
    (insert ".............")
    (goto-char 6)
    (insert "....")
    (goto-char 19)
    (delete-char 19)
    (goto-char 19)
    (insert "...............")
    (goto-char 13)
    (delete-char 21)
    (goto-char 7)
    (delete-char 0)
    (goto-char 14)
    (widen)
    (narrow-to-region 5 6)
    (goto-char 5)
    (delete-char 0)
    (goto-char 6)
    (insert "......")
    (goto-char 10)
    (delete-char 0)
    (goto-char 7)
    (widen)
    (narrow-to-region 2 6)
    (goto-char 2)
    (insert "..........")
    (goto-char 2)
    (delete-char 9)
    (goto-char 7)
    (insert "...")
    (goto-char 9)
    (insert "...")
    (goto-char 10)
    (insert "......")
    (goto-char 4)
    (delete-char 14)
    (goto-char 4)
    (insert ".")
    (goto-char 5)
    (insert "..............")
    (goto-char 13)
    (insert "......")
    (goto-char 10)
    (insert "......")
    (goto-char 20)
    (insert "............")
    (goto-char 16)
    (widen)
    (narrow-to-region 3 32)
    (goto-char 18)
    (insert "..")
    (goto-char 6)
    (insert "......")
    (goto-char 38)
    (delete-char 0)
    (goto-char 31)
    (insert "............")
    (goto-char 28)
    (insert "")
    (goto-char 9)
    (delete-char 23)
    (should
     (equal
      (test-overlay-regions)
      'nil))))

(ert-deftest overlay-autogenerated-test-40 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 52 3 nil t nil)
    (make-overlay 35 41 nil t t)
    (make-overlay 4 2 nil t nil)
    (make-overlay 51 48 nil nil t)
    (make-overlay 44 57 nil t t)
    (make-overlay 13 32 nil nil nil)
    (make-overlay 46 29 nil t nil)
    (make-overlay 28 13 nil t nil)
    (make-overlay 10 65 nil t t)
    (make-overlay 41 48 nil nil t)
    (make-overlay 36 44 nil nil t)
    (make-overlay 29 61 nil t nil)
    (make-overlay 25 24 nil nil t)
    (make-overlay 22 45 nil nil t)
    (make-overlay 37 55 nil nil t)
    (make-overlay 36 39 nil nil nil)
    (goto-char 16)
    (delete-char 48)
    (goto-char 17)
    (delete-char 0)
    (goto-char 7)
    (insert "..............")
    (goto-char 30)
    (insert "........")
    (goto-char 11)
    (insert "..........")
    (goto-char 5)
    (delete-char 14)
    (goto-char 19)
    (insert ".")
    (goto-char 27)
    (insert "..")
    (goto-char 35)
    (delete-char 1)
    (goto-char 29)
    (delete-char 0)
    (goto-char 33)
    (delete-char 2)
    (goto-char 33)
    (insert "..")
    (goto-char 28)
    (insert ".........")
    (goto-char 30)
    (delete-char 4)
    (goto-char 40)
    (delete-char 1)
    (goto-char 15)
    (widen)
    (narrow-to-region 40 8)
    (goto-char 10)
    (delete-char 13)
    (goto-char 11)
    (delete-char 5)
    (goto-char 15)
    (insert "........")
    (goto-char 26)
    (delete-char 4)
    (goto-char 11)
    (delete-char 1)
    (goto-char 14)
    (insert "............")
    (goto-char 33)
    (insert ".")
    (goto-char 10)
    (insert "...")
    (goto-char 30)
    (widen)
    (narrow-to-region 28 9)
    (goto-char 27)
    (delete-char 0)
    (goto-char 27)
    (delete-char 1)
    (goto-char 26)
    (insert "..")
    (goto-char 27)
    (insert "..")
    (goto-char 20)
    (delete-char 5)
    (goto-char 12)
    (widen)
    (narrow-to-region 40 30)
    (goto-char 37)
    (delete-char 3)
    (should
     (equal
      (test-overlay-regions)
      '((13 . 37)
        (14 . 37)
        (14 . 37)
        (14 . 37)
        (14 . 37)
        (14 . 37)
        (14 . 37)
        (37 . 37)
        (37 . 37))))))

(ert-deftest overlay-autogenerated-test-41 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 28 48 nil nil t)
    (make-overlay 30 11 nil nil t)
    (make-overlay 7 12 nil t nil)
    (make-overlay 65 35 nil t nil)
    (make-overlay 22 61 nil t nil)
    (make-overlay 37 42 nil nil nil)
    (make-overlay 33 38 nil nil t)
    (make-overlay 48 45 nil t t)
    (make-overlay 45 62 nil t nil)
    (make-overlay 63 7 nil nil t)
    (make-overlay 23 42 nil t nil)
    (make-overlay 21 4 nil t nil)
    (make-overlay 64 41 nil t nil)
    (make-overlay 20 33 nil t t)
    (make-overlay 41 26 nil t nil)
    (make-overlay 43 31 nil t t)
    (goto-char 55)
    (delete-char 3)
    (goto-char 12)
    (insert "..")
    (goto-char 62)
    (insert "")
    (goto-char 24)
    (delete-char 2)
    (goto-char 41)
    (insert "............")
    (goto-char 2)
    (insert ".")
    (goto-char 55)
    (insert "........")
    (goto-char 67)
    (delete-char 6)
    (goto-char 58)
    (delete-char 10)
    (goto-char 29)
    (insert "")
    (goto-char 6)
    (widen)
    (narrow-to-region 44 45)
    (goto-char 44)
    (delete-char 1)
    (goto-char 44)
    (widen)
    (narrow-to-region 24 37)
    (goto-char 30)
    (delete-char 7)
    (goto-char 27)
    (insert "......")
    (goto-char 35)
    (delete-char 0)
    (goto-char 32)
    (insert "...............")
    (goto-char 37)
    (delete-char 9)
    (goto-char 40)
    (insert "..........")
    (goto-char 35)
    (insert "......")
    (goto-char 25)
    (delete-char 7)
    (goto-char 40)
    (delete-char 4)
    (goto-char 25)
    (delete-char 14)
    (goto-char 28)
    (insert "")
    (goto-char 28)
    (widen)
    (narrow-to-region 17 43)
    (goto-char 20)
    (insert "..........")
    (goto-char 22)
    (delete-char 2)
    (goto-char 48)
    (insert "............")
    (goto-char 47)
    (insert ".........")
    (goto-char 69)
    (widen)
    (narrow-to-region 52 25)
    (goto-char 26)
    (insert "......")
    (goto-char 53)
    (insert "..")
    (should
     (equal
      (test-overlay-regions)
      '((5 . 38)
        (8 . 97)
        (12 . 47)
        (37 . 47)
        (39 . 52)
        (39 . 87)
        (39 . 95)
        (46 . 90)
        (47 . 49)
        (47 . 90)
        (47 . 99)
        (48 . 87))))))

(ert-deftest overlay-autogenerated-test-42 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 20 23 nil nil nil)
    (make-overlay 45 51 nil t nil)
    (make-overlay 34 58 nil t nil)
    (make-overlay 27 11 nil nil nil)
    (make-overlay 14 8 nil t t)
    (make-overlay 64 43 nil t nil)
    (make-overlay 61 56 nil nil t)
    (make-overlay 28 14 nil t nil)
    (make-overlay 21 46 nil t t)
    (make-overlay 30 34 nil t t)
    (make-overlay 47 40 nil nil nil)
    (make-overlay 5 44 nil t t)
    (make-overlay 11 45 nil nil nil)
    (make-overlay 65 8 nil nil t)
    (make-overlay 47 54 nil t t)
    (make-overlay 37 57 nil t nil)
    (goto-char 11)
    (insert "....")
    (goto-char 65)
    (delete-char 0)
    (goto-char 56)
    (delete-char 4)
    (goto-char 11)
    (delete-char 2)
    (goto-char 23)
    (insert ".............")
    (goto-char 2)
    (insert "............")
    (goto-char 84)
    (delete-char 1)
    (goto-char 10)
    (insert "..............")
    (goto-char 19)
    (insert "............")
    (goto-char 69)
    (delete-char 6)
    (goto-char 15)
    (insert "........")
    (goto-char 104)
    (insert "")
    (goto-char 94)
    (delete-char 11)
    (goto-char 66)
    (insert ".....")
    (goto-char 67)
    (insert "")
    (goto-char 53)
    (delete-char 22)
    (goto-char 42)
    (insert ".")
    (goto-char 38)
    (delete-char 13)
    (goto-char 27)
    (insert "......")
    (goto-char 16)
    (insert "............")
    (goto-char 71)
    (widen)
    (narrow-to-region 59 15)
    (goto-char 46)
    (insert "..")
    (goto-char 20)
    (widen)
    (narrow-to-region 95 93)
    (goto-char 94)
    (insert ".............")
    (goto-char 103)
    (widen)
    (narrow-to-region 97 7)
    (goto-char 93)
    (insert "....")
    (goto-char 85)
    (insert "...........")
    (goto-char 69)
    (delete-char 24)
    (goto-char 87)
    (insert ".............")
    (goto-char 7)
    (delete-char 28)
    (goto-char 65)
    (delete-char 8)
    (goto-char 48)
    (insert "......")
    (should
     (equal
      (test-overlay-regions)
      '((31 . 44)
        (33 . 33)
        (33 . 41)
        (33 . 41)
        (33 . 41)
        (33 . 41)
        (33 . 82)
        (40 . 44)
        (41 . 41)
        (41 . 41)
        (41 . 47)
        (41 . 48)
        (44 . 45)
        (44 . 46)
        (44 . 63)
        (46 . 57))))))

(ert-deftest overlay-autogenerated-test-43 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 8 53 nil t nil)
    (make-overlay 11 50 nil t nil)
    (make-overlay 1 30 nil nil nil)
    (make-overlay 54 15 nil t t)
    (make-overlay 22 30 nil nil nil)
    (make-overlay 1 33 nil nil nil)
    (make-overlay 18 15 nil t nil)
    (make-overlay 43 39 nil nil t)
    (make-overlay 43 17 nil t nil)
    (make-overlay 2 29 nil t nil)
    (make-overlay 57 42 nil t nil)
    (make-overlay 40 1 nil nil nil)
    (make-overlay 8 64 nil nil nil)
    (make-overlay 64 15 nil nil nil)
    (make-overlay 9 11 nil nil t)
    (make-overlay 40 21 nil t nil)
    (goto-char 5)
    (delete-char 37)
    (goto-char 25)
    (delete-char 2)
    (goto-char 17)
    (insert "...........")
    (goto-char 19)
    (widen)
    (narrow-to-region 20 20)
    (goto-char 20)
    (delete-char 0)
    (goto-char 20)
    (insert "..........")
    (goto-char 24)
    (delete-char 5)
    (goto-char 24)
    (insert "...")
    (goto-char 28)
    (widen)
    (narrow-to-region 20 36)
    (goto-char 26)
    (delete-char 2)
    (goto-char 31)
    (insert ".............")
    (goto-char 22)
    (insert ".....")
    (goto-char 38)
    (delete-char 0)
    (goto-char 31)
    (delete-char 4)
    (goto-char 27)
    (insert "...")
    (goto-char 23)
    (widen)
    (narrow-to-region 37 20)
    (goto-char 22)
    (insert ".............")
    (goto-char 33)
    (insert "......")
    (goto-char 43)
    (insert "............")
    (goto-char 59)
    (insert ".......")
    (goto-char 25)
    (delete-char 26)
    (goto-char 49)
    (insert ".........")
    (goto-char 50)
    (insert ".......")
    (goto-char 39)
    (widen)
    (narrow-to-region 54 86)
    (goto-char 64)
    (insert "...............")
    (goto-char 83)
    (insert "............")
    (goto-char 70)
    (insert "........")
    (goto-char 58)
    (insert "..............")
    (goto-char 83)
    (insert "............")
    (goto-char 83)
    (insert "..........")
    (goto-char 69)
    (delete-char 75)
    (goto-char 75)
    (delete-char 3)
    (should
     (equal
      (test-overlay-regions)
      '((5 . 75)
        (5 . 75)
        (5 . 80)
        (5 . 80))))))

(ert-deftest overlay-autogenerated-test-44 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 8 48 nil nil t)
    (make-overlay 52 38 nil nil nil)
    (make-overlay 3 63 nil nil nil)
    (make-overlay 44 15 nil nil t)
    (make-overlay 27 44 nil nil t)
    (make-overlay 43 9 nil nil t)
    (make-overlay 11 27 nil t nil)
    (make-overlay 36 41 nil nil t)
    (make-overlay 23 25 nil t t)
    (make-overlay 19 60 nil t t)
    (make-overlay 11 55 nil t nil)
    (make-overlay 59 2 nil t nil)
    (make-overlay 32 64 nil t nil)
    (make-overlay 15 8 nil nil nil)
    (make-overlay 61 15 nil nil nil)
    (make-overlay 64 30 nil t t)
    (goto-char 42)
    (delete-char 20)
    (goto-char 44)
    (delete-char 1)
    (goto-char 43)
    (insert "...........")
    (goto-char 43)
    (delete-char 1)
    (goto-char 28)
    (delete-char 8)
    (goto-char 37)
    (delete-char 9)
    (goto-char 4)
    (delete-char 30)
    (goto-char 6)
    (delete-char 0)
    (goto-char 7)
    (delete-char 0)
    (goto-char 2)
    (delete-char 2)
    (goto-char 5)
    (delete-char 0)
    (goto-char 5)
    (delete-char 0)
    (goto-char 2)
    (insert ".....")
    (goto-char 10)
    (insert "...........")
    (goto-char 21)
    (insert "...")
    (goto-char 10)
    (delete-char 13)
    (goto-char 9)
    (insert "..........")
    (goto-char 16)
    (delete-char 1)
    (goto-char 16)
    (delete-char 4)
    (goto-char 16)
    (delete-char 0)
    (goto-char 14)
    (delete-char 1)
    (goto-char 3)
    (widen)
    (narrow-to-region 2 9)
    (goto-char 2)
    (insert "")
    (goto-char 2)
    (insert ".............")
    (goto-char 17)
    (insert "....")
    (goto-char 12)
    (insert "........")
    (goto-char 8)
    (widen)
    (narrow-to-region 32 23)
    (goto-char 29)
    (insert ".....")
    (goto-char 35)
    (delete-char 2)
    (goto-char 27)
    (delete-char 7)
    (goto-char 23)
    (widen)
    (narrow-to-region 4 14)
    (goto-char 8)
    (insert "...............")
    (should
     (equal
      (test-overlay-regions)
      '((2 . 43)
        (2 . 43)
        (2 . 43)
        (2 . 43)
        (2 . 43)
        (2 . 44))))))

(ert-deftest overlay-autogenerated-test-45 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 15 48 nil nil nil)
    (make-overlay 1 47 nil t nil)
    (make-overlay 43 4 nil t t)
    (make-overlay 9 45 nil t t)
    (make-overlay 1 25 nil t t)
    (make-overlay 5 46 nil t t)
    (make-overlay 7 14 nil t nil)
    (make-overlay 1 53 nil nil t)
    (make-overlay 13 41 nil t nil)
    (make-overlay 5 31 nil t t)
    (make-overlay 26 10 nil nil nil)
    (make-overlay 56 37 nil nil nil)
    (make-overlay 23 15 nil t nil)
    (make-overlay 62 30 nil t t)
    (make-overlay 2 35 nil t t)
    (make-overlay 46 41 nil nil nil)
    (goto-char 65)
    (delete-char 0)
    (goto-char 55)
    (insert "...........")
    (goto-char 22)
    (insert "")
    (goto-char 73)
    (delete-char 3)
    (goto-char 43)
    (widen)
    (narrow-to-region 54 63)
    (goto-char 56)
    (insert "......")
    (goto-char 61)
    (delete-char 3)
    (goto-char 65)
    (insert "......")
    (goto-char 66)
    (insert ".....")
    (goto-char 62)
    (insert ".")
    (goto-char 74)
    (insert ".........")
    (goto-char 76)
    (delete-char 4)
    (goto-char 56)
    (widen)
    (narrow-to-region 2 46)
    (goto-char 43)
    (insert "...........")
    (goto-char 20)
    (delete-char 4)
    (goto-char 38)
    (delete-char 7)
    (goto-char 25)
    (delete-char 21)
    (goto-char 12)
    (insert ".........")
    (goto-char 19)
    (widen)
    (narrow-to-region 72 61)
    (goto-char 63)
    (insert "")
    (goto-char 65)
    (delete-char 4)
    (goto-char 61)
    (delete-char 5)
    (goto-char 63)
    (delete-char 0)
    (goto-char 63)
    (delete-char 0)
    (goto-char 62)
    (delete-char 0)
    (goto-char 61)
    (insert "............")
    (goto-char 72)
    (insert "..............")
    (goto-char 62)
    (delete-char 7)
    (goto-char 71)
    (delete-char 5)
    (goto-char 75)
    (widen)
    (narrow-to-region 29 8)
    (goto-char 17)
    (delete-char 2)
    (goto-char 27)
    (insert "........")
    (should
     (equal
      (test-overlay-regions)
      '((1 . 36)
        (1 . 41)
        (1 . 47)
        (2 . 40)
        (4 . 40)
        (5 . 40)
        (5 . 40)
        (7 . 21)
        (9 . 40)
        (10 . 37)
        (20 . 40)
        (22 . 27)
        (22 . 42))))))

(ert-deftest overlay-autogenerated-test-46 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 2 43 nil nil t)
    (make-overlay 44 40 nil nil t)
    (make-overlay 49 14 nil nil t)
    (make-overlay 6 55 nil nil nil)
    (make-overlay 13 52 nil t t)
    (make-overlay 40 54 nil t nil)
    (make-overlay 51 41 nil nil t)
    (make-overlay 7 28 nil nil t)
    (make-overlay 10 47 nil nil t)
    (make-overlay 63 21 nil t nil)
    (make-overlay 4 55 nil nil nil)
    (make-overlay 52 58 nil t nil)
    (make-overlay 62 11 nil t t)
    (make-overlay 22 49 nil t nil)
    (make-overlay 23 65 nil nil nil)
    (make-overlay 50 33 nil nil t)
    (goto-char 22)
    (insert "..............")
    (goto-char 12)
    (insert "....")
    (goto-char 25)
    (delete-char 16)
    (goto-char 14)
    (delete-char 53)
    (goto-char 2)
    (insert "............")
    (goto-char 20)
    (delete-char 5)
    (goto-char 11)
    (delete-char 7)
    (goto-char 9)
    (widen)
    (narrow-to-region 11 7)
    (goto-char 8)
    (insert "...............")
    (goto-char 12)
    (delete-char 4)
    (goto-char 21)
    (insert "...")
    (goto-char 20)
    (delete-char 5)
    (goto-char 7)
    (delete-char 3)
    (goto-char 16)
    (delete-char 0)
    (goto-char 12)
    (delete-char 1)
    (goto-char 15)
    (delete-char 0)
    (goto-char 7)
    (insert "..............")
    (goto-char 17)
    (insert "...........")
    (goto-char 15)
    (insert "............")
    (goto-char 20)
    (delete-char 5)
    (goto-char 7)
    (insert "....")
    (goto-char 37)
    (delete-char 7)
    (goto-char 8)
    (insert "..........")
    (goto-char 47)
    (insert ".............")
    (goto-char 65)
    (insert ".......")
    (goto-char 39)
    (delete-char 26)
    (goto-char 14)
    (delete-char 2)
    (goto-char 27)
    (insert ".............")
    (goto-char 17)
    (widen)
    (narrow-to-region 54 32)
    (goto-char 40)
    (widen)
    (narrow-to-region 10 3)
    (goto-char 7)
    (insert "........")
    (goto-char 13)
    (insert "..............")
    (should
     (equal
      (test-overlay-regions)
      '((2 . 85))))))

(ert-deftest overlay-autogenerated-test-47 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 58 62 nil t nil)
    (make-overlay 14 38 nil nil nil)
    (make-overlay 63 44 nil t t)
    (make-overlay 41 41 nil nil t)
    (make-overlay 19 39 nil nil nil)
    (make-overlay 10 49 nil t t)
    (make-overlay 56 38 nil t t)
    (make-overlay 23 38 nil nil t)
    (make-overlay 1 64 nil nil t)
    (make-overlay 21 3 nil t nil)
    (make-overlay 1 1 nil nil t)
    (make-overlay 27 61 nil nil nil)
    (make-overlay 29 59 nil nil nil)
    (make-overlay 37 30 nil t nil)
    (make-overlay 47 21 nil nil t)
    (make-overlay 34 26 nil t nil)
    (goto-char 6)
    (delete-char 44)
    (goto-char 8)
    (delete-char 0)
    (goto-char 8)
    (insert "....")
    (goto-char 17)
    (delete-char 2)
    (goto-char 12)
    (insert "...")
    (goto-char 20)
    (insert "")
    (goto-char 2)
    (delete-char 20)
    (goto-char 1)
    (insert ".........")
    (goto-char 7)
    (insert ".............")
    (goto-char 27)
    (delete-char 0)
    (goto-char 15)
    (insert "..........")
    (goto-char 36)
    (insert "..............")
    (goto-char 26)
    (insert "..............")
    (goto-char 63)
    (insert "...........")
    (goto-char 9)
    (insert "............")
    (goto-char 71)
    (delete-char 17)
    (goto-char 36)
    (insert "....")
    (goto-char 45)
    (delete-char 31)
    (goto-char 28)
    (delete-char 8)
    (goto-char 10)
    (delete-char 16)
    (goto-char 14)
    (delete-char 4)
    (goto-char 16)
    (delete-char 0)
    (goto-char 15)
    (insert "")
    (goto-char 14)
    (delete-char 1)
    (goto-char 10)
    (delete-char 2)
    (goto-char 6)
    (delete-char 0)
    (goto-char 1)
    (insert ".........")
    (goto-char 23)
    (insert "......")
    (goto-char 25)
    (insert "..........")
    (goto-char 25)
    (widen)
    (narrow-to-region 10 30)
    (goto-char 21)
    (delete-char 1)
    (goto-char 17)
    (insert "..........")
    (should
     (equal
      (test-overlay-regions)
      '((1 . 48)
        (1 . 48)
        (32 . 32)
        (32 . 32)
        (32 . 32)
        (32 . 32)
        (32 . 32)
        (32 . 32)
        (32 . 32)
        (32 . 32)
        (32 . 48)
        (32 . 48)
        (32 . 48))))))

(ert-deftest overlay-autogenerated-test-48 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 1 11 nil nil nil)
    (make-overlay 35 29 nil t t)
    (make-overlay 24 46 nil nil t)
    (make-overlay 15 43 nil nil t)
    (make-overlay 51 49 nil t t)
    (make-overlay 25 43 nil t nil)
    (make-overlay 23 59 nil nil nil)
    (make-overlay 10 4 nil t nil)
    (make-overlay 40 45 nil nil nil)
    (make-overlay 42 43 nil nil t)
    (make-overlay 20 38 nil t nil)
    (make-overlay 17 49 nil nil nil)
    (make-overlay 9 25 nil nil t)
    (make-overlay 13 19 nil nil nil)
    (make-overlay 44 31 nil t nil)
    (make-overlay 12 65 nil nil t)
    (goto-char 59)
    (widen)
    (narrow-to-region 28 14)
    (goto-char 26)
    (insert "...")
    (goto-char 30)
    (delete-char 1)
    (goto-char 23)
    (insert "...")
    (goto-char 27)
    (widen)
    (narrow-to-region 45 67)
    (goto-char 50)
    (insert "...............")
    (goto-char 59)
    (insert "..............")
    (goto-char 55)
    (insert ".............")
    (goto-char 106)
    (delete-char 0)
    (goto-char 97)
    (delete-char 10)
    (goto-char 67)
    (delete-char 16)
    (goto-char 76)
    (insert "..............")
    (goto-char 71)
    (insert ".............")
    (goto-char 110)
    (delete-char 0)
    (goto-char 56)
    (delete-char 38)
    (goto-char 61)
    (delete-char 10)
    (goto-char 56)
    (delete-char 5)
    (goto-char 49)
    (insert ".......")
    (goto-char 62)
    (insert "...")
    (goto-char 54)
    (insert "..........")
    (goto-char 47)
    (delete-char 10)
    (goto-char 47)
    (delete-char 20)
    (goto-char 46)
    (insert ".............")
    (goto-char 56)
    (insert "...........")
    (goto-char 70)
    (delete-char 1)
    (goto-char 62)
    (widen)
    (narrow-to-region 50 64)
    (goto-char 60)
    (insert "..")
    (goto-char 55)
    (delete-char 6)
    (goto-char 60)
    (insert ".............")
    (goto-char 61)
    (delete-char 9)
    (goto-char 64)
    (delete-char 0)
    (goto-char 53)
    (widen)
    (narrow-to-region 15 62)
    (should
     (equal
      (test-overlay-regions)
      '((9 . 28)
        (12 . 73)
        (13 . 19)
        (15 . 70)
        (17 . 70)
        (20 . 43)
        (23 . 70)
        (27 . 70)
        (28 . 70)
        (34 . 40)
        (36 . 70)
        (45 . 70))))))

(ert-deftest overlay-autogenerated-test-49 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 24 10 nil nil t)
    (make-overlay 53 23 nil t nil)
    (make-overlay 53 9 nil nil t)
    (make-overlay 65 64 nil t t)
    (make-overlay 48 2 nil nil t)
    (make-overlay 12 58 nil nil t)
    (make-overlay 64 64 nil nil nil)
    (make-overlay 26 13 nil t t)
    (make-overlay 46 26 nil nil t)
    (make-overlay 28 59 nil t t)
    (make-overlay 33 52 nil nil nil)
    (make-overlay 39 8 nil t t)
    (make-overlay 9 59 nil t t)
    (make-overlay 50 45 nil nil t)
    (make-overlay 41 53 nil nil t)
    (make-overlay 51 51 nil t nil)
    (goto-char 61)
    (insert "..............")
    (goto-char 19)
    (widen)
    (narrow-to-region 10 65)
    (goto-char 65)
    (delete-char 0)
    (goto-char 11)
    (insert "...............")
    (goto-char 77)
    (delete-char 0)
    (goto-char 51)
    (insert "...")
    (goto-char 75)
    (insert ".....")
    (goto-char 77)
    (delete-char 11)
    (goto-char 45)
    (delete-char 0)
    (goto-char 24)
    (widen)
    (narrow-to-region 33 52)
    (goto-char 46)
    (insert "..............")
    (goto-char 46)
    (insert "..........")
    (goto-char 39)
    (widen)
    (narrow-to-region 46 77)
    (goto-char 77)
    (insert "..............")
    (goto-char 54)
    (insert ".......")
    (goto-char 87)
    (insert ".")
    (goto-char 70)
    (delete-char 16)
    (goto-char 79)
    (delete-char 0)
    (goto-char 73)
    (widen)
    (narrow-to-region 74 100)
    (goto-char 91)
    (insert ".............")
    (goto-char 80)
    (delete-char 11)
    (goto-char 82)
    (insert "......")
    (goto-char 108)
    (delete-char 0)
    (goto-char 104)
    (insert ".....")
    (goto-char 100)
    (delete-char 1)
    (goto-char 90)
    (insert ".............")
    (goto-char 99)
    (insert ".............")
    (goto-char 124)
    (insert "..............")
    (goto-char 114)
    (insert "....")
    (goto-char 134)
    (delete-char 0)
    (goto-char 89)
    (delete-char 65)
    (goto-char 75)
    (delete-char 16)
    (should
     (equal
      (test-overlay-regions)
      '((2 . 75)
        (8 . 75)
        (9 . 76)
        (9 . 82)
        (27 . 82)
        (38 . 76)
        (41 . 75)
        (43 . 82)
        (70 . 75))))))

(ert-deftest overlay-autogenerated-test-50 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 29 53 nil t t)
    (make-overlay 65 64 nil nil nil)
    (make-overlay 3 31 nil nil t)
    (make-overlay 45 59 nil t nil)
    (make-overlay 60 37 nil t t)
    (make-overlay 7 5 nil t t)
    (make-overlay 37 24 nil nil nil)
    (make-overlay 45 20 nil nil nil)
    (make-overlay 33 42 nil nil t)
    (make-overlay 47 57 nil t nil)
    (make-overlay 14 49 nil t t)
    (make-overlay 14 30 nil t nil)
    (make-overlay 21 40 nil t t)
    (make-overlay 5 45 nil t t)
    (make-overlay 59 40 nil t t)
    (make-overlay 37 52 nil nil nil)
    (goto-char 48)
    (insert "")
    (goto-char 7)
    (insert ".........")
    (goto-char 31)
    (insert "...........")
    (goto-char 41)
    (delete-char 7)
    (goto-char 21)
    (delete-char 11)
    (goto-char 41)
    (widen)
    (narrow-to-region 51 53)
    (goto-char 52)
    (insert ".....")
    (goto-char 55)
    (widen)
    (narrow-to-region 18 24)
    (goto-char 23)
    (widen)
    (narrow-to-region 39 38)
    (goto-char 38)
    (insert ".............")
    (goto-char 41)
    (insert "......")
    (goto-char 38)
    (insert "..............")
    (goto-char 52)
    (insert "...............")
    (goto-char 78)
    (delete-char 5)
    (goto-char 50)
    (insert "..........")
    (goto-char 50)
    (delete-char 3)
    (goto-char 85)
    (widen)
    (narrow-to-region 86 1)
    (goto-char 5)
    (insert "....")
    (goto-char 69)
    (insert "...........")
    (goto-char 94)
    (insert "......")
    (goto-char 98)
    (delete-char 7)
    (goto-char 46)
    (insert "...............")
    (goto-char 79)
    (insert "............")
    (goto-char 89)
    (insert "")
    (goto-char 14)
    (delete-char 63)
    (goto-char 20)
    (insert ".........")
    (goto-char 34)
    (insert "...")
    (goto-char 53)
    (delete-char 14)
    (goto-char 6)
    (widen)
    (narrow-to-region 6 52)
    (goto-char 42)
    (insert "...........")
    (goto-char 40)
    (insert ".......")
    (goto-char 46)
    (widen)
    (narrow-to-region 1 68)
    (should
     (equal
      (test-overlay-regions)
      '((3 . 14)
        (9 . 14)
        (9 . 91)
        (14 . 14)
        (14 . 83)
        (14 . 86)
        (14 . 88)
        (14 . 91)
        (14 . 95)
        (14 . 104))))))

(ert-deftest overlay-autogenerated-test-51 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 14 5 nil t nil)
    (make-overlay 62 34 nil nil t)
    (make-overlay 7 62 nil nil t)
    (make-overlay 23 12 nil t t)
    (make-overlay 16 4 nil nil nil)
    (make-overlay 24 15 nil nil nil)
    (make-overlay 6 6 nil t t)
    (make-overlay 25 64 nil t t)
    (make-overlay 23 6 nil t t)
    (make-overlay 55 64 nil nil nil)
    (make-overlay 8 62 nil nil t)
    (make-overlay 65 65 nil nil nil)
    (make-overlay 57 51 nil t t)
    (make-overlay 35 8 nil t nil)
    (make-overlay 55 13 nil nil t)
    (make-overlay 60 62 nil nil t)
    (goto-char 12)
    (insert "..")
    (goto-char 66)
    (insert "............")
    (goto-char 32)
    (insert "..")
    (goto-char 27)
    (insert ".........")
    (goto-char 8)
    (insert ".............")
    (goto-char 79)
    (insert ".")
    (goto-char 47)
    (insert "....")
    (goto-char 49)
    (insert "...")
    (goto-char 81)
    (insert "....")
    (goto-char 112)
    (delete-char 0)
    (goto-char 97)
    (insert ".....")
    (goto-char 109)
    (delete-char 5)
    (goto-char 20)
    (insert ".....")
    (goto-char 59)
    (delete-char 33)
    (goto-char 87)
    (insert ".............")
    (goto-char 98)
    (insert "....")
    (goto-char 22)
    (delete-char 36)
    (goto-char 45)
    (insert "..............")
    (goto-char 42)
    (delete-char 29)
    (goto-char 51)
    (widen)
    (narrow-to-region 39 41)
    (goto-char 39)
    (delete-char 2)
    (goto-char 39)
    (insert ".............")
    (goto-char 51)
    (insert "......")
    (goto-char 52)
    (insert "...............")
    (goto-char 56)
    (widen)
    (narrow-to-region 59 20)
    (goto-char 56)
    (insert "............")
    (goto-char 57)
    (insert ".")
    (goto-char 37)
    (delete-char 12)
    (goto-char 39)
    (delete-char 11)
    (goto-char 38)
    (delete-char 8)
    (goto-char 36)
    (widen)
    (narrow-to-region 65 26)
    (goto-char 40)
    (widen)
    (narrow-to-region 27 55)
    (should
     (equal
      (test-overlay-regions)
      '((7 . 55)
        (8 . 55)
        (22 . 29)
        (23 . 55)
        (23 . 56)
        (24 . 31)
        (29 . 56)
        (37 . 55))))))

(ert-deftest overlay-autogenerated-test-52 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 58 32 nil nil nil)
    (make-overlay 44 54 nil nil t)
    (make-overlay 27 50 nil nil nil)
    (make-overlay 55 35 nil nil t)
    (make-overlay 40 46 nil nil t)
    (make-overlay 56 63 nil t nil)
    (make-overlay 29 48 nil nil nil)
    (make-overlay 45 24 nil t nil)
    (make-overlay 60 25 nil t nil)
    (make-overlay 55 41 nil t nil)
    (make-overlay 55 1 nil nil t)
    (make-overlay 30 45 nil t t)
    (make-overlay 26 19 nil nil t)
    (make-overlay 61 5 nil nil nil)
    (make-overlay 33 5 nil nil nil)
    (make-overlay 42 18 nil t nil)
    (goto-char 55)
    (insert ".")
    (goto-char 49)
    (delete-char 12)
    (goto-char 41)
    (insert "..........")
    (goto-char 27)
    (insert ".....")
    (goto-char 58)
    (insert "...........")
    (goto-char 24)
    (delete-char 23)
    (goto-char 47)
    (delete-char 9)
    (goto-char 4)
    (insert "...")
    (goto-char 10)
    (delete-char 32)
    (goto-char 4)
    (insert "..............")
    (goto-char 29)
    (insert "....")
    (goto-char 28)
    (delete-char 2)
    (goto-char 34)
    (insert "...........")
    (goto-char 9)
    (insert "......")
    (goto-char 5)
    (insert "")
    (goto-char 45)
    (delete-char 1)
    (goto-char 18)
    (insert ".........")
    (goto-char 36)
    (delete-char 5)
    (goto-char 15)
    (delete-char 27)
    (goto-char 15)
    (delete-char 10)
    (goto-char 16)
    (delete-char 2)
    (goto-char 16)
    (widen)
    (narrow-to-region 10 2)
    (goto-char 9)
    (delete-char 1)
    (goto-char 3)
    (delete-char 2)
    (goto-char 2)
    (widen)
    (narrow-to-region 9 10)
    (goto-char 9)
    (insert "...........")
    (goto-char 19)
    (delete-char 0)
    (goto-char 14)
    (delete-char 3)
    (goto-char 11)
    (delete-char 2)
    (goto-char 9)
    (delete-char 6)
    (goto-char 9)
    (delete-char 0)
    (goto-char 10)
    (insert "....")
    (should
     (equal
      (test-overlay-regions)
      '((1 . 17))))))

(ert-deftest overlay-autogenerated-test-53 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 10 30 nil nil nil)
    (make-overlay 11 57 nil t nil)
    (make-overlay 59 56 nil nil t)
    (make-overlay 20 37 nil nil t)
    (make-overlay 41 29 nil nil nil)
    (make-overlay 31 10 nil nil t)
    (make-overlay 6 36 nil nil nil)
    (make-overlay 12 54 nil nil nil)
    (make-overlay 25 26 nil t t)
    (make-overlay 21 19 nil nil t)
    (make-overlay 1 21 nil nil t)
    (make-overlay 48 51 nil nil nil)
    (make-overlay 54 55 nil t nil)
    (make-overlay 64 48 nil t t)
    (make-overlay 56 25 nil nil t)
    (make-overlay 12 60 nil t nil)
    (goto-char 41)
    (delete-char 1)
    (goto-char 63)
    (insert "")
    (goto-char 14)
    (delete-char 5)
    (goto-char 11)
    (insert "..............")
    (goto-char 41)
    (widen)
    (narrow-to-region 12 1)
    (goto-char 1)
    (delete-char 3)
    (goto-char 9)
    (delete-char 0)
    (goto-char 5)
    (insert "..............")
    (goto-char 1)
    (insert "..........")
    (goto-char 29)
    (insert "...............")
    (goto-char 4)
    (insert "..")
    (goto-char 31)
    (delete-char 15)
    (goto-char 31)
    (insert "")
    (goto-char 27)
    (insert "......")
    (goto-char 6)
    (insert "...")
    (goto-char 23)
    (widen)
    (narrow-to-region 23 47)
    (goto-char 37)
    (delete-char 2)
    (goto-char 35)
    (delete-char 5)
    (goto-char 38)
    (delete-char 2)
    (goto-char 30)
    (insert ".......")
    (goto-char 45)
    (widen)
    (narrow-to-region 13 2)
    (goto-char 9)
    (delete-char 1)
    (goto-char 3)
    (insert ".....")
    (goto-char 2)
    (insert "...............")
    (goto-char 16)
    (delete-char 5)
    (goto-char 20)
    (insert ".....")
    (goto-char 26)
    (delete-char 0)
    (goto-char 26)
    (widen)
    (narrow-to-region 76 98)
    (goto-char 88)
    (insert ".........")
    (goto-char 92)
    (insert ".")
    (goto-char 108)
    (delete-char 0)
    (goto-char 103)
    (delete-char 3)
    (should
     (equal
      (test-overlay-regions)
      '((1 . 79)
        (37 . 103)
        (61 . 88)
        (61 . 99)
        (74 . 121)
        (75 . 118)
        (75 . 124)
        (77 . 79)
        (78 . 103)
        (83 . 84)
        (83 . 120)
        (87 . 106))))))

(ert-deftest overlay-autogenerated-test-54 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 58 36 nil t t)
    (make-overlay 55 49 nil nil t)
    (make-overlay 12 25 nil nil t)
    (make-overlay 16 37 nil t t)
    (make-overlay 42 25 nil t t)
    (make-overlay 8 41 nil t t)
    (make-overlay 13 27 nil nil t)
    (make-overlay 52 22 nil t nil)
    (make-overlay 36 17 nil t nil)
    (make-overlay 1 52 nil t nil)
    (make-overlay 55 5 nil nil t)
    (make-overlay 50 50 nil t nil)
    (make-overlay 32 15 nil t nil)
    (make-overlay 39 26 nil t nil)
    (make-overlay 26 4 nil nil nil)
    (make-overlay 38 47 nil t t)
    (goto-char 23)
    (insert ".")
    (goto-char 57)
    (delete-char 6)
    (goto-char 54)
    (insert "..............")
    (goto-char 46)
    (insert "...............")
    (goto-char 29)
    (insert ".......")
    (goto-char 58)
    (delete-char 21)
    (goto-char 45)
    (delete-char 4)
    (goto-char 50)
    (delete-char 4)
    (goto-char 20)
    (insert ".........")
    (goto-char 16)
    (insert "......")
    (goto-char 17)
    (insert ".....")
    (goto-char 63)
    (insert "........")
    (goto-char 83)
    (insert "....")
    (goto-char 73)
    (delete-char 8)
    (goto-char 69)
    (insert "...........")
    (goto-char 48)
    (widen)
    (narrow-to-region 19 31)
    (goto-char 22)
    (delete-char 3)
    (goto-char 23)
    (delete-char 5)
    (goto-char 20)
    (insert "............")
    (goto-char 23)
    (delete-char 11)
    (goto-char 19)
    (insert "..........")
    (goto-char 23)
    (insert "........")
    (goto-char 38)
    (delete-char 1)
    (goto-char 33)
    (delete-char 5)
    (goto-char 27)
    (insert "..........")
    (goto-char 35)
    (delete-char 8)
    (goto-char 35)
    (insert ".")
    (goto-char 20)
    (insert "......")
    (goto-char 22)
    (delete-char 22)
    (goto-char 23)
    (delete-char 0)
    (goto-char 22)
    (widen)
    (narrow-to-region 1 41)
    (goto-char 13)
    (insert ".......")
    (should
     (equal
      (test-overlay-regions)
      '((1 . 83)
        (4 . 46)
        (5 . 97)
        (8 . 83)
        (12 . 45)
        (13 . 47)
        (22 . 59)
        (30 . 82)
        (30 . 83)
        (41 . 83)
        (45 . 83)
        (46 . 83))))))

(ert-deftest overlay-autogenerated-test-55 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 58 20 nil nil nil)
    (make-overlay 60 33 nil t nil)
    (make-overlay 6 27 nil nil nil)
    (make-overlay 53 31 nil nil t)
    (make-overlay 30 55 nil t t)
    (make-overlay 4 64 nil t t)
    (make-overlay 51 31 nil nil t)
    (make-overlay 4 65 nil t t)
    (make-overlay 57 62 nil t t)
    (make-overlay 28 7 nil nil t)
    (make-overlay 61 48 nil t nil)
    (make-overlay 23 54 nil nil t)
    (make-overlay 47 49 nil nil nil)
    (make-overlay 12 52 nil t nil)
    (make-overlay 39 57 nil t t)
    (make-overlay 28 61 nil nil t)
    (goto-char 8)
    (insert "..............")
    (goto-char 63)
    (delete-char 3)
    (goto-char 67)
    (delete-char 6)
    (goto-char 3)
    (widen)
    (narrow-to-region 10 67)
    (goto-char 43)
    (insert ".............")
    (goto-char 20)
    (insert "...............")
    (goto-char 18)
    (insert "..")
    (goto-char 37)
    (delete-char 47)
    (goto-char 34)
    (insert "..............")
    (goto-char 31)
    (delete-char 2)
    (goto-char 16)
    (widen)
    (narrow-to-region 29 36)
    (goto-char 31)
    (delete-char 2)
    (goto-char 31)
    (insert ".......")
    (goto-char 40)
    (delete-char 0)
    (goto-char 32)
    (widen)
    (narrow-to-region 40 19)
    (goto-char 40)
    (insert "..")
    (goto-char 37)
    (delete-char 0)
    (goto-char 40)
    (delete-char 1)
    (goto-char 34)
    (delete-char 4)
    (goto-char 33)
    (insert "..............")
    (goto-char 19)
    (widen)
    (narrow-to-region 78 70)
    (goto-char 77)
    (insert ".........")
    (goto-char 80)
    (delete-char 1)
    (goto-char 73)
    (delete-char 3)
    (goto-char 70)
    (insert ".........")
    (goto-char 75)
    (delete-char 10)
    (goto-char 74)
    (delete-char 3)
    (goto-char 73)
    (insert "...............")
    (goto-char 90)
    (insert "......")
    (goto-char 94)
    (insert "..............")
    (goto-char 101)
    (insert "........")
    (goto-char 111)
    (insert "........")
    (should
     (equal
      (test-overlay-regions)
      '((4 . 132)
        (4 . 133)
        (65 . 89)
        (65 . 89)
        (65 . 89)
        (65 . 89)
        (65 . 129)
        (65 . 130)
        (65 . 130)
        (65 . 130)
        (65 . 130)
        (89 . 89)
        (89 . 130))))))

(ert-deftest overlay-autogenerated-test-56 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 7 14 nil nil t)
    (make-overlay 10 10 nil nil t)
    (make-overlay 21 23 nil nil t)
    (make-overlay 4 44 nil t nil)
    (make-overlay 42 16 nil t t)
    (make-overlay 1 57 nil t nil)
    (make-overlay 15 27 nil nil nil)
    (make-overlay 31 1 nil t nil)
    (make-overlay 56 45 nil t t)
    (make-overlay 46 19 nil t nil)
    (make-overlay 15 6 nil nil nil)
    (make-overlay 31 26 nil nil t)
    (make-overlay 39 41 nil t t)
    (make-overlay 52 48 nil nil t)
    (make-overlay 44 2 nil t nil)
    (make-overlay 60 7 nil nil t)
    (goto-char 49)
    (delete-char 11)
    (goto-char 43)
    (delete-char 9)
    (goto-char 42)
    (delete-char 2)
    (goto-char 12)
    (insert "...........")
    (goto-char 36)
    (insert ".........")
    (goto-char 1)
    (insert "......")
    (goto-char 67)
    (delete-char 0)
    (goto-char 47)
    (insert ".............")
    (goto-char 57)
    (insert "........")
    (goto-char 22)
    (widen)
    (narrow-to-region 75 33)
    (goto-char 41)
    (delete-char 28)
    (goto-char 43)
    (delete-char 0)
    (goto-char 33)
    (delete-char 5)
    (goto-char 38)
    (insert "..")
    (goto-char 42)
    (delete-char 0)
    (goto-char 38)
    (delete-char 0)
    (goto-char 38)
    (insert "............")
    (goto-char 51)
    (insert ".......")
    (goto-char 48)
    (insert "..")
    (goto-char 55)
    (insert ".")
    (goto-char 33)
    (delete-char 8)
    (goto-char 42)
    (insert "..")
    (goto-char 45)
    (insert "..")
    (goto-char 59)
    (insert ".............")
    (goto-char 53)
    (insert ".......")
    (goto-char 81)
    (delete-char 0)
    (goto-char 44)
    (delete-char 36)
    (goto-char 38)
    (delete-char 8)
    (goto-char 33)
    (insert ".............")
    (goto-char 41)
    (insert "..............")
    (goto-char 65)
    (insert "...............")
    (goto-char 61)
    (insert "...")
    (should
     (equal
      (test-overlay-regions)
      '((7 . 86)
        (7 . 97)
        (8 . 97)
        (10 . 97)
        (13 . 97)
        (32 . 68)
        (33 . 60)
        (60 . 97)
        (60 . 97)
        (68 . 86))))))

(ert-deftest overlay-autogenerated-test-57 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 52 31 nil t nil)
    (make-overlay 39 17 nil t nil)
    (make-overlay 19 20 nil t t)
    (make-overlay 18 3 nil nil t)
    (make-overlay 19 47 nil nil t)
    (make-overlay 38 54 nil nil nil)
    (make-overlay 30 51 nil nil t)
    (make-overlay 29 60 nil t t)
    (make-overlay 57 38 nil nil nil)
    (make-overlay 13 41 nil t nil)
    (make-overlay 9 44 nil t nil)
    (make-overlay 30 55 nil t nil)
    (make-overlay 33 10 nil nil nil)
    (make-overlay 14 35 nil nil t)
    (make-overlay 53 50 nil t nil)
    (make-overlay 25 28 nil nil t)
    (goto-char 40)
    (insert "..")
    (goto-char 64)
    (insert "........")
    (goto-char 47)
    (insert "............")
    (goto-char 65)
    (delete-char 0)
    (goto-char 86)
    (delete-char 1)
    (goto-char 59)
    (delete-char 11)
    (goto-char 64)
    (delete-char 8)
    (goto-char 53)
    (delete-char 0)
    (goto-char 28)
    (delete-char 8)
    (goto-char 6)
    (delete-char 33)
    (goto-char 14)
    (delete-char 2)
    (goto-char 2)
    (delete-char 10)
    (goto-char 3)
    (insert "..")
    (goto-char 5)
    (insert ".........")
    (goto-char 1)
    (insert "........")
    (goto-char 10)
    (delete-char 4)
    (goto-char 26)
    (insert "........")
    (goto-char 23)
    (insert "....")
    (goto-char 1)
    (widen)
    (narrow-to-region 15 23)
    (goto-char 19)
    (insert "...")
    (goto-char 24)
    (delete-char 0)
    (goto-char 19)
    (insert ".......")
    (goto-char 18)
    (insert "..")
    (goto-char 33)
    (insert "...")
    (goto-char 32)
    (insert "...............")
    (goto-char 29)
    (delete-char 10)
    (goto-char 29)
    (insert "..........")
    (goto-char 50)
    (insert "")
    (goto-char 16)
    (insert ".........")
    (goto-char 52)
    (widen)
    (narrow-to-region 59 15)
    (goto-char 35)
    (delete-char 4)
    (goto-char 18)
    (insert "....")
    (should
     (equal
      (test-overlay-regions)
      '((10 . 57)
        (10 . 57)
        (10 . 57)
        (10 . 60)
        (10 . 60)
        (10 . 61)
        (10 . 68)
        (57 . 57))))))

(ert-deftest overlay-autogenerated-test-58 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 8 16 nil t nil)
    (make-overlay 57 27 nil nil nil)
    (make-overlay 15 62 nil nil nil)
    (make-overlay 32 33 nil nil t)
    (make-overlay 47 27 nil nil t)
    (make-overlay 41 4 nil nil t)
    (make-overlay 57 61 nil t nil)
    (make-overlay 18 43 nil nil t)
    (make-overlay 64 51 nil t t)
    (make-overlay 44 26 nil nil nil)
    (make-overlay 9 13 nil nil t)
    (make-overlay 41 65 nil nil t)
    (make-overlay 23 13 nil t t)
    (make-overlay 26 59 nil t t)
    (make-overlay 65 65 nil t t)
    (make-overlay 15 7 nil nil nil)
    (goto-char 41)
    (insert "........")
    (goto-char 35)
    (delete-char 14)
    (goto-char 32)
    (widen)
    (narrow-to-region 23 46)
    (goto-char 41)
    (delete-char 5)
    (goto-char 29)
    (delete-char 10)
    (goto-char 31)
    (insert ".")
    (goto-char 29)
    (insert "........")
    (goto-char 27)
    (delete-char 7)
    (goto-char 29)
    (insert "")
    (goto-char 24)
    (insert "............")
    (goto-char 43)
    (delete-char 1)
    (goto-char 31)
    (delete-char 9)
    (goto-char 34)
    (widen)
    (narrow-to-region 20 14)
    (goto-char 20)
    (delete-char 0)
    (goto-char 17)
    (insert "...........")
    (goto-char 31)
    (delete-char 0)
    (goto-char 16)
    (insert "...........")
    (goto-char 17)
    (delete-char 8)
    (goto-char 23)
    (delete-char 5)
    (goto-char 20)
    (insert "..........")
    (goto-char 33)
    (widen)
    (narrow-to-region 16 29)
    (goto-char 24)
    (insert "...............")
    (goto-char 44)
    (delete-char 0)
    (goto-char 30)
    (insert "....")
    (goto-char 27)
    (widen)
    (narrow-to-region 4 22)
    (goto-char 10)
    (insert "..............")
    (goto-char 36)
    (insert "..")
    (goto-char 10)
    (delete-char 21)
    (goto-char 14)
    (delete-char 1)
    (goto-char 14)
    (insert "...........")
    (goto-char 12)
    (insert "........")
    (goto-char 32)
    (insert "........")
    (should
     (equal
      (test-overlay-regions)
      '((4 . 92)
        (7 . 10)
        (8 . 10)
        (9 . 10)
        (10 . 82)
        (10 . 104))))))

(ert-deftest overlay-autogenerated-test-59 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 46 30 nil t t)
    (make-overlay 3 26 nil nil nil)
    (make-overlay 36 28 nil t t)
    (make-overlay 49 49 nil t t)
    (make-overlay 27 61 nil t nil)
    (make-overlay 14 16 nil nil nil)
    (make-overlay 50 61 nil t nil)
    (make-overlay 59 63 nil nil nil)
    (make-overlay 36 34 nil t nil)
    (make-overlay 35 29 nil nil nil)
    (make-overlay 5 65 nil nil nil)
    (make-overlay 20 61 nil nil t)
    (make-overlay 10 42 nil nil nil)
    (make-overlay 47 49 nil nil t)
    (make-overlay 12 4 nil nil nil)
    (make-overlay 32 24 nil t t)
    (goto-char 11)
    (insert ".")
    (goto-char 32)
    (delete-char 2)
    (goto-char 61)
    (insert ".........")
    (goto-char 36)
    (insert "........")
    (goto-char 55)
    (widen)
    (narrow-to-region 8 55)
    (goto-char 21)
    (insert "....")
    (goto-char 32)
    (delete-char 15)
    (goto-char 30)
    (delete-char 5)
    (goto-char 31)
    (insert "......")
    (goto-char 18)
    (insert "..")
    (goto-char 14)
    (insert ".............")
    (goto-char 34)
    (insert "............")
    (goto-char 51)
    (widen)
    (narrow-to-region 58 31)
    (goto-char 50)
    (delete-char 5)
    (goto-char 53)
    (insert ".........")
    (goto-char 56)
    (insert "...............")
    (goto-char 45)
    (delete-char 1)
    (goto-char 67)
    (insert "............")
    (goto-char 84)
    (insert "")
    (goto-char 39)
    (delete-char 27)
    (goto-char 39)
    (delete-char 21)
    (goto-char 32)
    (insert "............")
    (goto-char 36)
    (widen)
    (narrow-to-region 7 37)
    (goto-char 11)
    (insert ".......")
    (goto-char 21)
    (delete-char 13)
    (goto-char 15)
    (insert "....")
    (goto-char 9)
    (insert ".............")
    (goto-char 13)
    (delete-char 21)
    (goto-char 21)
    (delete-char 6)
    (goto-char 16)
    (insert ".......")
    (goto-char 22)
    (insert "")
    (goto-char 27)
    (delete-char 0)
    (should
     (equal
      (test-overlay-regions)
      '((3 . 42)
        (4 . 16)
        (5 . 83)
        (13 . 51)
        (25 . 27))))))

(ert-deftest overlay-autogenerated-test-60 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 38 32 nil t nil)
    (make-overlay 32 42 nil t nil)
    (make-overlay 29 11 nil nil t)
    (make-overlay 52 22 nil t t)
    (make-overlay 39 59 nil t nil)
    (make-overlay 41 30 nil t t)
    (make-overlay 29 61 nil nil t)
    (make-overlay 11 45 nil nil nil)
    (make-overlay 46 17 nil nil t)
    (make-overlay 35 51 nil t t)
    (make-overlay 22 13 nil nil t)
    (make-overlay 52 34 nil nil t)
    (make-overlay 59 4 nil nil t)
    (make-overlay 8 22 nil nil nil)
    (make-overlay 4 49 nil nil nil)
    (make-overlay 52 45 nil t t)
    (goto-char 48)
    (delete-char 16)
    (goto-char 37)
    (delete-char 8)
    (goto-char 14)
    (insert "...............")
    (goto-char 40)
    (delete-char 16)
    (goto-char 19)
    (insert ".........")
    (goto-char 16)
    (insert "......")
    (goto-char 10)
    (insert "........")
    (goto-char 11)
    (insert "...............")
    (goto-char 22)
    (insert ".")
    (goto-char 62)
    (delete-char 16)
    (goto-char 14)
    (delete-char 11)
    (goto-char 47)
    (insert "....")
    (goto-char 33)
    (insert ".............")
    (goto-char 49)
    (delete-char 13)
    (goto-char 28)
    (insert "..")
    (goto-char 35)
    (delete-char 13)
    (goto-char 44)
    (insert "....")
    (goto-char 34)
    (delete-char 14)
    (goto-char 23)
    (insert ".....")
    (goto-char 25)
    (delete-char 4)
    (goto-char 33)
    (insert ".....")
    (goto-char 27)
    (delete-char 3)
    (goto-char 16)
    (widen)
    (narrow-to-region 36 37)
    (goto-char 36)
    (delete-char 1)
    (goto-char 36)
    (insert ".......")
    (goto-char 37)
    (widen)
    (narrow-to-region 35 31)
    (goto-char 34)
    (delete-char 0)
    (goto-char 31)
    (delete-char 2)
    (goto-char 31)
    (widen)
    (narrow-to-region 24 3)
    (goto-char 22)
    (delete-char 2)
    (goto-char 22)
    (insert ".............")
    (goto-char 4)
    (insert ".")
    (should
     (equal
      (test-overlay-regions)
      '((4 . 54)
        (4 . 54)
        (9 . 46))))))

(ert-deftest overlay-autogenerated-test-61 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 45 56 nil t nil)
    (make-overlay 60 45 nil nil nil)
    (make-overlay 26 8 nil t t)
    (make-overlay 63 39 nil nil nil)
    (make-overlay 18 11 nil t nil)
    (make-overlay 22 64 nil nil t)
    (make-overlay 8 41 nil nil t)
    (make-overlay 6 51 nil t t)
    (make-overlay 38 26 nil t t)
    (make-overlay 7 46 nil t nil)
    (make-overlay 2 42 nil nil t)
    (make-overlay 44 64 nil nil nil)
    (make-overlay 7 62 nil t nil)
    (make-overlay 8 40 nil nil t)
    (make-overlay 62 36 nil t t)
    (make-overlay 61 27 nil nil nil)
    (goto-char 21)
    (delete-char 0)
    (goto-char 8)
    (insert "")
    (goto-char 55)
    (insert "......")
    (goto-char 38)
    (delete-char 25)
    (goto-char 37)
    (delete-char 4)
    (goto-char 12)
    (delete-char 4)
    (goto-char 3)
    (delete-char 26)
    (goto-char 10)
    (insert ".......")
    (goto-char 18)
    (delete-char 0)
    (goto-char 16)
    (insert ".............")
    (goto-char 18)
    (delete-char 3)
    (goto-char 7)
    (insert "...")
    (goto-char 20)
    (insert "........")
    (goto-char 38)
    (delete-char 0)
    (goto-char 1)
    (delete-char 36)
    (goto-char 3)
    (delete-char 1)
    (goto-char 2)
    (insert "......")
    (goto-char 4)
    (insert ".......")
    (goto-char 2)
    (insert "...........")
    (goto-char 27)
    (insert ".....")
    (goto-char 15)
    (insert "...............")
    (goto-char 2)
    (insert "......")
    (goto-char 17)
    (delete-char 8)
    (goto-char 15)
    (delete-char 7)
    (goto-char 33)
    (delete-char 5)
    (goto-char 13)
    (insert "...........")
    (goto-char 34)
    (insert "...............")
    (goto-char 33)
    (insert "")
    (goto-char 51)
    (insert "....")
    (goto-char 14)
    (delete-char 36)
    (goto-char 16)
    (delete-char 1)
    (goto-char 14)
    (delete-char 8)
    (should
     (equal
      (test-overlay-regions)
      '((1 . 1)
        (1 . 1)
        (1 . 1)
        (1 . 1)
        (1 . 1)
        (1 . 1)
        (1 . 1)
        (1 . 1)
        (1 . 1)
        (1 . 1)
        (1 . 1)
        (1 . 1)
        (1 . 1)
        (1 . 1)
        (1 . 18)
        (1 . 18))))))

(ert-deftest overlay-autogenerated-test-62 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 25 36 nil t nil)
    (make-overlay 38 6 nil t nil)
    (make-overlay 40 63 nil nil t)
    (make-overlay 34 23 nil nil nil)
    (make-overlay 48 46 nil nil nil)
    (make-overlay 43 57 nil t t)
    (make-overlay 6 53 nil t t)
    (make-overlay 37 27 nil t t)
    (make-overlay 8 39 nil t nil)
    (make-overlay 62 6 nil nil nil)
    (make-overlay 51 6 nil t t)
    (make-overlay 58 11 nil nil t)
    (make-overlay 19 25 nil t nil)
    (make-overlay 13 8 nil nil nil)
    (make-overlay 19 8 nil nil t)
    (make-overlay 39 5 nil t t)
    (goto-char 51)
    (delete-char 5)
    (goto-char 16)
    (delete-char 9)
    (goto-char 18)
    (insert "")
    (goto-char 47)
    (delete-char 4)
    (goto-char 24)
    (insert ".........")
    (goto-char 24)
    (insert ".....")
    (goto-char 18)
    (insert "...........")
    (goto-char 5)
    (delete-char 6)
    (goto-char 30)
    (insert "...........")
    (goto-char 8)
    (insert ".............")
    (goto-char 78)
    (insert "............")
    (goto-char 67)
    (insert "")
    (goto-char 58)
    (insert "")
    (goto-char 5)
    (insert ".")
    (goto-char 79)
    (widen)
    (narrow-to-region 51 55)
    (goto-char 51)
    (insert "....")
    (goto-char 58)
    (widen)
    (narrow-to-region 36 37)
    (goto-char 37)
    (insert "....")
    (goto-char 40)
    (insert ".......")
    (goto-char 47)
    (delete-char 1)
    (goto-char 43)
    (delete-char 4)
    (goto-char 37)
    (insert "........")
    (goto-char 49)
    (insert "............")
    (goto-char 42)
    (widen)
    (narrow-to-region 75 111)
    (goto-char 104)
    (widen)
    (narrow-to-region 21 95)
    (goto-char 22)
    (widen)
    (narrow-to-region 64 79)
    (goto-char 64)
    (delete-char 0)
    (goto-char 68)
    (insert "........")
    (goto-char 82)
    (insert "")
    (goto-char 81)
    (insert "........")
    (goto-char 92)
    (delete-char 2)
    (goto-char 87)
    (insert ".")
    (should
     (equal
      (test-overlay-regions)
      '((5 . 145)
        (5 . 148)
        (6 . 118)
        (6 . 119)
        (6 . 119)
        (6 . 143)
        (6 . 143)
        (24 . 114)
        (24 . 116)
        (63 . 117))))))

(ert-deftest overlay-autogenerated-test-63 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 9 49 nil t nil)
    (make-overlay 9 16 nil nil nil)
    (make-overlay 64 2 nil t t)
    (make-overlay 17 31 nil nil t)
    (make-overlay 24 51 nil nil nil)
    (make-overlay 27 56 nil t t)
    (make-overlay 21 4 nil nil nil)
    (make-overlay 24 29 nil t t)
    (make-overlay 4 63 nil nil t)
    (make-overlay 34 49 nil t nil)
    (make-overlay 19 47 nil nil t)
    (make-overlay 8 50 nil t nil)
    (make-overlay 49 61 nil t nil)
    (make-overlay 52 10 nil t t)
    (make-overlay 64 30 nil t nil)
    (make-overlay 5 13 nil t nil)
    (goto-char 27)
    (insert "........")
    (goto-char 42)
    (insert "......")
    (goto-char 48)
    (insert "....")
    (goto-char 55)
    (widen)
    (narrow-to-region 10 5)
    (goto-char 8)
    (insert ".............")
    (goto-char 19)
    (insert "......")
    (goto-char 19)
    (delete-char 3)
    (goto-char 8)
    (delete-char 3)
    (goto-char 9)
    (insert ".......")
    (goto-char 29)
    (insert "...............")
    (goto-char 38)
    (insert ".......")
    (goto-char 34)
    (insert "......")
    (goto-char 28)
    (delete-char 20)
    (goto-char 22)
    (insert "............")
    (goto-char 21)
    (delete-char 23)
    (goto-char 25)
    (delete-char 2)
    (goto-char 19)
    (delete-char 2)
    (goto-char 12)
    (delete-char 6)
    (goto-char 12)
    (delete-char 0)
    (goto-char 13)
    (delete-char 0)
    (goto-char 12)
    (insert "........")
    (goto-char 23)
    (delete-char 2)
    (goto-char 5)
    (insert "...............")
    (goto-char 28)
    (delete-char 0)
    (goto-char 16)
    (insert "..........")
    (goto-char 8)
    (delete-char 17)
    (goto-char 27)
    (delete-char 0)
    (goto-char 12)
    (insert ".")
    (goto-char 14)
    (delete-char 12)
    (goto-char 11)
    (insert "..............")
    (goto-char 34)
    (insert "")
    (goto-char 25)
    (delete-char 8)
    (should
     (equal
      (test-overlay-regions)
      '((2 . 98)
        (4 . 37)
        (4 . 97)
        (25 . 29)
        (25 . 32)
        (25 . 84))))))

(ert-deftest overlay-autogenerated-test-64 nil
  (with-temp-buffer
    (insert "................................................................")
    (make-overlay 31 10 nil nil nil)
    (make-overlay 17 58 nil nil t)
    (make-overlay 20 21 nil t nil)
    (make-overlay 3 47 nil t t)
    (make-overlay 47 43 nil t t)
    (make-overlay 54 8 nil nil t)
    (make-overlay 51 26 nil t nil)
    (make-overlay 60 14 nil t nil)
    (make-overlay 38 6 nil nil t)
    (make-overlay 41 9 nil nil nil)
    (make-overlay 44 38 nil nil t)
    (make-overlay 55 48 nil nil t)
    (make-overlay 10 41 nil nil t)
    (make-overlay 35 49 nil t nil)
    (make-overlay 50 46 nil nil nil)
    (make-overlay 28 28 nil t nil)
    (goto-char 59)
    (delete-char 3)
    (goto-char 28)
    (widen)
    (narrow-to-region 13 7)
    (goto-char 11)
    (insert ".")
    (goto-char 9)
    (delete-char 3)
    (goto-char 8)
    (delete-char 0)
    (goto-char 7)
    (insert ".............")
    (goto-char 9)
    (insert "..........")
    (goto-char 22)
    (delete-char 1)
    (goto-char 31)
    (delete-char 2)
    (goto-char 22)
    (insert ".........")
    (goto-char 33)
    (delete-char 1)
    (goto-char 29)
    (widen)
    (narrow-to-region 59 51)
    (goto-char 52)
    (insert ".........")
    (goto-char 53)
    (insert "........")
    (goto-char 53)
    (delete-char 4)
    (goto-char 54)
    (insert "........")
    (goto-char 53)
    (insert "....")
    (goto-char 75)
    (widen)
    (goto-char 70)
    (delete-char 2)
    (goto-char 108)
    (delete-char 1)
    (goto-char 80)
    (widen)
    (goto-char 70)
    (widen)
    (narrow-to-region 49 63)
    (goto-char 49)
    (insert "...")
    (goto-char 66)
    (delete-char 0)
    (goto-char 63)
    (delete-char 3)
    (goto-char 59)
    (insert "..........")
    (goto-char 56)
    (delete-char 6)
    (goto-char 60)
    (insert ".........")
    (goto-char 62)
    (widen)
    (goto-char 58)
    (insert ".............")
    (goto-char 105)
    (widen)
    (narrow-to-region 94 109)
    (goto-char 103)
    (insert "............")
    (should
     (equal
      (test-overlay-regions)
      '((3 . 134)
        (6 . 125)
        (38 . 141)
        (39 . 118)
        (39 . 128)
        (39 . 128)
        (40 . 146)
        (43 . 145)
        (101 . 138)
        (103 . 103))))))

) ;; End of `when nil' for autogenerated insert/delete/narrow tests.

(ert-deftest buffer-multibyte-overlong-sequences ()
  (dolist (uni '("\xE0\x80\x80"
                 "\xF0\x80\x80\x80"
                 "\xF8\x8F\xBF\xBF\x80"))
    (let ((multi (string-to-multibyte uni)))
      (should
       (string-equal
        multi
        (with-temp-buffer
          (set-buffer-multibyte nil)
          (insert uni)
          (set-buffer-multibyte t)
          (buffer-string)))))))

;; https://debbugs.gnu.org/33492
(ert-deftest buffer-tests-buffer-local-variables-undo ()
  "Test that `buffer-undo-list' appears in `buffer-local-variables'."
  (with-temp-buffer
    (should (assq 'buffer-undo-list (buffer-local-variables)))))

(ert-deftest buffer-tests-inhibit-buffer-hooks ()
  "Test `get-buffer-create' argument INHIBIT-BUFFER-HOOKS."
  (let* (run-bluh (bluh (lambda () (setq run-bluh t))))
    (unwind-protect
        (let* ( run-kbh  (kbh  (lambda () (setq run-kbh  t)))
                run-kbqf (kbqf (lambda () (setq run-kbqf t))) )

          ;; Inhibited.
          (add-hook 'buffer-list-update-hook bluh)
          (with-current-buffer (generate-new-buffer " foo" t)
            (add-hook 'kill-buffer-hook kbh nil t)
            (add-hook 'kill-buffer-query-functions kbqf nil t)
            (kill-buffer))
          (with-temp-buffer (ignore))
          (with-output-to-string (ignore))
          (should-not run-bluh)
          (should-not run-kbh)
          (should-not run-kbqf)

          ;; Not inhibited.
          (with-current-buffer (generate-new-buffer " foo")
            (should run-bluh)
            (add-hook 'kill-buffer-hook kbh nil t)
            (add-hook 'kill-buffer-query-functions kbqf nil t)
            (kill-buffer))
          (should run-kbh)
          (should run-kbqf))
      (remove-hook 'buffer-list-update-hook bluh))))

(ert-deftest buffer-tests-inhibit-buffer-hooks-indirect ()
  "Indirect buffers do not call `get-buffer-create'."
  (dolist (inhibit '(nil t))
    (let ((base (get-buffer-create "foo" inhibit)))
      (unwind-protect
          (dotimes (_i 11)
            (let* (flag*
                   (flag (lambda () (prog1 t (setq flag* t))))
                   (indirect (make-indirect-buffer base "foo[indirect]" nil
                                                   inhibit)))
              (unwind-protect
                  (progn
                    (with-current-buffer indirect
                      (add-hook 'kill-buffer-query-functions flag nil t))
                    (kill-buffer indirect)
                    (if inhibit
                        (should-not flag*)
                      (should flag*)))
                (let (kill-buffer-query-functions)
                  (when (buffer-live-p indirect)
                    (kill-buffer indirect))))))
        (let (kill-buffer-query-functions)
          (when (buffer-live-p base)
            (kill-buffer base)))))))

(ert-deftest zero-length-overlays-and-not ()
  (with-temp-buffer
    (insert "hello")
    (let ((long-overlay (make-overlay 2 4))
          (zero-overlay (make-overlay 3 3)))
      ;; Exclude.
      (should (= (length (overlays-at 3)) 1))
      (should (eq (car (overlays-at 3)) long-overlay))
      ;; Include.
      (should (= (length (overlays-in 3 3)) 2))
      (should (memq long-overlay (overlays-in 3 3)))
      (should (memq zero-overlay (overlays-in 3 3))))))

(ert-deftest test-remove-overlays ()
  (with-temp-buffer
    (insert "foo")
    (make-overlay (point) (point))
    (should (= (length (overlays-in (point-min) (point-max))) 1))
    (remove-overlays)
    (should (= (length (overlays-in (point-min) (point-max))) 0)))

  (with-temp-buffer
    (insert "foo")
    (goto-char 2)
    (make-overlay (point) (point))
    ;; We only count zero-length overlays at the end of the buffer.
    (should (= (length (overlays-in 1 2)) 0))
    (narrow-to-region 1 2)
    ;; We've now narrowed, so the zero-length overlay is at the end of
    ;; the (accessible part of the) buffer.
    (should (= (length (overlays-in 1 2)) 1))
    (remove-overlays)
    (should (= (length (overlays-in (point-min) (point-max))) 0))))

(ert-deftest test-kill-buffer-auto-save-default ()
  (ert-with-temp-file file
    (let (auto-save)
      ;; Always answer yes.
      (cl-letf (((symbol-function #'yes-or-no-p) (lambda (_) t)))
        (unwind-protect
            (progn
              (find-file file)
              (auto-save-mode t)
              (insert "foo\n")
              (should buffer-auto-save-file-name)
              (setq auto-save buffer-auto-save-file-name)
              (do-auto-save)
              (should (file-exists-p auto-save))
              (kill-buffer (current-buffer))
              (should (file-exists-p auto-save)))
          (when auto-save
            (ignore-errors (delete-file auto-save))))))))

(ert-deftest test-kill-buffer-auto-save-delete ()
  (ert-with-temp-file file
    (let (auto-save)
      (should (file-exists-p file))
      (setq kill-buffer-delete-auto-save-files t)
      ;; Always answer yes.
      (cl-letf (((symbol-function #'yes-or-no-p) (lambda (_) t)))
        (unwind-protect
            (progn
              (find-file file)
              (auto-save-mode t)
              (insert "foo\n")
              (should buffer-auto-save-file-name)
              (setq auto-save buffer-auto-save-file-name)
              (do-auto-save)
              (should (file-exists-p auto-save))
              ;; This should delete the auto-save file.
              (kill-buffer (current-buffer))
              (should-not (file-exists-p auto-save)))
          (ignore-errors (delete-file file))
          (when auto-save
            (ignore-errors (delete-file auto-save)))))
      ;; Answer no to deletion.
      (cl-letf (((symbol-function #'yes-or-no-p)
                 (lambda (prompt)
                   (not (string-search "Delete auto-save file" prompt)))))
        (unwind-protect
            (progn
              (find-file file)
              (auto-save-mode t)
              (insert "foo\n")
              (should buffer-auto-save-file-name)
              (setq auto-save buffer-auto-save-file-name)
              (do-auto-save)
              (should (file-exists-p auto-save))
              ;; This should not delete the auto-save file.
              (kill-buffer (current-buffer))
              (should (file-exists-p auto-save)))
          (when auto-save
            (ignore-errors (delete-file auto-save))))))))

(ert-deftest test-buffer-modifications ()
  (ert-with-temp-file file
    (with-current-buffer (find-file file)
      (auto-save-mode 1)
      (should-not (buffer-modified-p))
      (insert "foo")
      (should (buffer-modified-p))
      (should-not (eq (buffer-modified-p) 'autosaved))
      (do-auto-save nil t)
      (should (eq (buffer-modified-p) 'autosaved))
      (with-silent-modifications
        (put-text-property 1 3 'face 'bold))
      (should (eq (buffer-modified-p) 'autosaved))
      (save-buffer)
      (should-not (buffer-modified-p))
      (with-silent-modifications
        (put-text-property 1 3 'face 'italic))
      (should-not (buffer-modified-p)))))

(ert-deftest test-restore-buffer-modified-p ()
  (ert-with-temp-file file
    ;; This avoids the annoying "foo and bar are the same file" on
    ;; MS-Windows.
    (setq file (file-truename file))
    (with-current-buffer (find-file file)
      (auto-save-mode 1)
      (should-not (eq (buffer-modified-p) t))
      (insert "foo")
      (should (buffer-modified-p))
      (restore-buffer-modified-p nil)
      (should-not (buffer-modified-p))
      (insert "bar")
      (do-auto-save nil t)
      (should (eq (buffer-modified-p) 'autosaved))
      (insert "zot")
      (restore-buffer-modified-p 'autosaved)
      (should (eq (buffer-modified-p) 'autosaved))

      ;; Clean up.
      (when (file-exists-p buffer-auto-save-file-name)
        (delete-file buffer-auto-save-file-name))))

  (ert-with-temp-file file
    (setq file (file-truename file))
    (with-current-buffer (find-file file)
      (auto-save-mode 1)
      (should-not (eq (buffer-modified-p) t))
      (insert "foo")
      (should (buffer-modified-p))
      (should-not (eq (buffer-modified-p) 'autosaved))
      (restore-buffer-modified-p 'autosaved)
      (should (eq (buffer-modified-p) 'autosaved)))))

(ert-deftest test-buffer-chars-modified-ticks ()
  "Test `buffer-chars-modified-tick'."
  (setq temporary-file-directory (file-truename temporary-file-directory))
  (let ((text "foobar")
        f1 f2)
    (unwind-protect
        (progn
          (setq f1 (make-temp-file "buf-modiff-tests")
                f2 (make-temp-file "buf-modiff-tests"))
          (with-current-buffer (find-file f1)
            (should (= (buffer-chars-modified-tick) 1))
            (should (= (buffer-chars-modified-tick) (buffer-modified-tick)))
            (write-region text nil f2 nil 'silent)
            (insert-file-contents f2)
            (should (= (buffer-chars-modified-tick) (buffer-modified-tick)))
            (should (> (buffer-chars-modified-tick) 1))))
      (if f1 (delete-file f1))
      (if f2 (delete-file f2))
      )))

;;; buffer-tests.el ends here