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;;; buffer-tests.el --- tests for buffer.c functions -*- lexical-binding: t -*-
;; Copyright (C) 2015-2019 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)
(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)))))
;;; buffer-tests.el ends here
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