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;;; search-tests.el --- tests for search.c functions -*- lexical-binding: t -*-
;; Copyright (C) 2015-2016, 2018-2026 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)
;; This test was bad: modification hooks should never modify
;; the buffer text, because it causes problems in too many places.
;;(ert-deftest test-replace-match-modification-hooks () ;bug#42424
;; (let ((ov-set nil))
;; (with-temp-buffer
;; (insert "1 abc")
;; (setq ov-set (make-overlay 3 5))
;; (overlay-put
;; ov-set 'modification-hooks
;; (list (lambda (_o after &rest _args)
;; (when after
;; (let ((inhibit-modification-hooks t))
;; (save-excursion
;; (goto-char 2)
;; (insert "234")))))))
;; (goto-char 3)
;; (if (search-forward "bc")
;; (replace-match "bcd"))
;; (should (= (point) 10)))))
(ert-deftest search-test--replace-match-update-data ()
(with-temp-buffer
(pcase-dolist (`(,pre ,post) '(("" "")
("a" "")
("" "b")
("a" "b")))
(erase-buffer)
(insert "hello ")
(save-excursion (insert pre post " world"))
(should (looking-at
(concat "\\(\\)" pre "\\(\\)\\(\\(\\)\\)\\(\\)" post "\\(\\)")))
(let* ((beg0 (match-beginning 0))
(beg4 (+ beg0 (length pre)))
(end4 (+ beg4 (length "BOO")))
(end0 (+ end4 (length post))))
(replace-match "BOO" t t nil 4)
(should (equal (match-beginning 0) beg0))
(should (equal (match-beginning 1) beg0))
(should (equal (match-beginning 2) beg4))
(should (equal (match-beginning 3) beg4))
(should (equal (match-beginning 4) beg4))
(should (equal (match-end 6) end0))
(should (equal (match-end 5) end4))
(should (equal (match-end 4) end4))
(should (equal (match-end 3) end4))
(should (equal (match-end 0) end0))
;; `update_search_regs' doesn't have enough information to get
;; the ones below correctly in all cases.
(when (> (length post) 0)
(should (equal (match-beginning 6) end0)))
(when (> (length pre) 0)
(should (equal (match-end 1) beg0)))
;; `update_search_regs' doesn't have enough information to get
;; the ones below correctly at all.
;;(should (equal (match-beginning 5) end4))
;;(should (equal (match-end 2) beg4))
))))
;;; search-tests.el ends here
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