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;;; paren-tests.el --- Tests for paren.el -*- lexical-binding: t; -*-
;; Copyright (C) 2019-2025 Free Software Foundation, Inc.
;; Author: Simen Heggestøyl <simenheg@gmail.com>
;; Keywords:
;; 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/>.
;;; Commentary:
;;
;;; Code:
(require 'ert)
(require 'paren)
(ert-deftest paren-tests-unescaped-p ()
(with-temp-buffer
(insert "(insert)")
(backward-char)
(should (show-paren--unescaped-p (point)))
(insert "\\")
(should-not (show-paren--unescaped-p (point)))))
(ert-deftest paren-tests-categorize-paren ()
(with-temp-buffer
(insert "(insert)")
(backward-char)
(should (equal (show-paren--categorize-paren (point))
(cons -1 (+ (point) 1))))
(goto-char (point-min))
(should (equal (show-paren--categorize-paren (point))
(cons 1 (point))))))
(ert-deftest paren-tests-locate-near-paren ()
(with-temp-buffer
(let ((show-paren-when-point-inside-paren nil)
(show-paren-when-point-in-periphery nil))
(insert "(insert)")
(should (equal (show-paren--locate-near-paren)
(cons -1 (point))))
(backward-char)
(should-not (show-paren--locate-near-paren))
(goto-char (point-min))
(should (equal (show-paren--locate-near-paren)
(cons 1 (point-min))))
(forward-char)
(should-not (show-paren--locate-near-paren)))))
(ert-deftest paren-tests-locate-near-paren-inside ()
(with-temp-buffer
(let ((show-paren-when-point-inside-paren t)
(show-paren-when-point-in-periphery nil))
(insert "(insert)")
(should (equal (show-paren--locate-near-paren)
(cons -1 (point))))
(backward-char)
(should (equal (show-paren--locate-near-paren)
(cons -1 (+ (point) 1))))
(goto-char (point-min))
(should (equal (show-paren--locate-near-paren)
(cons 1 (point-min))))
(forward-char)
(should (equal (show-paren--locate-near-paren)
(cons 1 (point-min)))))))
(ert-deftest paren-tests-locate-near-paren-in-periphery ()
(with-temp-buffer
(let ((show-paren-when-point-inside-paren nil)
(show-paren-when-point-in-periphery t))
(insert " (insert) ")
(should (equal (show-paren--locate-near-paren)
(cons -1 (- (point) 1))))
(backward-char 2)
(should-not (show-paren--locate-near-paren))
(goto-char (point-min))
(should (equal (show-paren--locate-near-paren)
(cons 1 (+ (point) 1))))
(forward-char)
(should (equal (show-paren--locate-near-paren)
(cons 1 (point))))
(forward-char)
(should-not (show-paren--locate-near-paren)))))
(ert-deftest paren-tests-default ()
(with-temp-buffer
(insert "(insert")
(goto-char (point-min))
(should (equal (show-paren--default)
(list (point) (+ (point) 1)
nil nil
t)))
(goto-char (point-max))
(insert ")")
(should (equal (show-paren--default)
(list (- (point) 1) (point)
(point-min) (+ (point-min) 1)
nil)))
(goto-char (point-min))
(should (equal (show-paren--default)
(list (point) (+ (point) 1)
(- (point-max) 1) (point-max)
nil)))))
(ert-deftest paren-tests-open-paren-line ()
(cl-flet ((open-paren-line ()
(let* ((data (show-paren--default))
(here-beg (nth 0 data))
(there-beg (nth 2 data)))
(blink-paren-open-paren-line-string
(min here-beg there-beg)))))
;; Lisp-like
(with-temp-buffer
(insert "(defun foo ()
(dummy))")
(goto-char (point-max))
(should (string= "(defun foo ()" (open-paren-line))))
;; C-like
(with-temp-buffer
(insert "int foo() {
int blah;
}")
(goto-char (point-max))
(should (string= "int foo() {" (open-paren-line))))
;; C-like with hanging {
(with-temp-buffer
(insert "int foo()
{
int blah;
}")
(goto-char (point-max))
(should (string= "int foo()...{" (open-paren-line))))))
(provide 'paren-tests)
;;; paren-tests.el ends here
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