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;;; mule-tests.el --- unit tests for mule.el -*- lexical-binding: t; -*-
;; Copyright (C) 2017-2023 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/>.
;;; Commentary:
;; Unit tests for lisp/international/mule.el.
;;; Code:
(require 'ert-x) ;For `ert-simulate-keys'.
(ert-deftest find-auto-coding--bug27391 ()
"Check that Bug#27391 is fixed."
(with-temp-buffer
(insert "\n[comment]: # ( Local Variables: )\n"
"[comment]: # ( coding: utf-8 )\n"
"[comment]: # ( End: )\n")
(goto-char (point-min))
(should (equal (let ((auto-coding-alist ())
(auto-coding-regexp-alist ())
(auto-coding-functions ()))
(find-auto-coding "" (buffer-size)))
'(utf-8 . :coding)))))
(ert-deftest mule-cmds-tests--encode-ebcdic ()
(should (equal (encode-coding-char ?a 'ebcdic-int) "\201"))
(should (not (multibyte-string-p (encode-coding-char ?a 'utf-8)))))
(ert-deftest mule-cmds--test-universal-coding-system-argument ()
(should (equal "ccccccccccccccccab"
(let ((enable-recursive-minibuffers t))
(ert-simulate-keys
(kbd "C-x RET c u t f - 8 RET C-u C-u c a b RET")
(read-string "prompt:"))))))
(ert-deftest mule-utf-7 ()
;; utf-7 and utf-7-imap are not ASCII-compatible.
(should-not (coding-system-get 'utf-7 :ascii-compatible-p))
(should-not (coding-system-get 'utf-7-imap :ascii-compatible-p))
;; Invariant ASCII subset.
(let ((s (apply #'string (append (number-sequence #x20 #x25)
(number-sequence #x27 #x7e)))))
(should (equal (encode-coding-string s 'utf-7-imap) s))
(should (equal (decode-coding-string s 'utf-7-imap) s)))
;; Escaped ampersand.
(should (equal (encode-coding-string "a&bcd" 'utf-7-imap) "a&-bcd"))
(should (equal (decode-coding-string "a&-bcd" 'utf-7-imap) "a&bcd"))
;; Ability to encode Unicode.
(should (equal (check-coding-systems-region "あ" nil '(utf-7-imap)) nil))
(should (equal (encode-coding-string "あ" 'utf-7-imap) "&MEI-"))
(should (equal (decode-coding-string "&MEI-" 'utf-7-imap) "あ")))
(ert-deftest mule-hz ()
;; The chinese-hz encoding is not ASCII compatible.
(should-not (coding-system-get 'chinese-hz :ascii-compatible-p)))
;; Stop "Local Variables" above causing confusion when visiting this file.
;;; mule-tests.el ends here
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