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;;; character-tests.el --- tests for character.c -*- lexical-binding:t -*-
;; Copyright (C) 2021 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 character-test-string-width ()
"Test `string-width' with and without compositions."
(should (= (string-width "1234") 4))
(should (= (string-width "12\t34") (+ 4 tab-width)))
(should (= (string-width "áëòç") 4))
(should (= (string-width "áëòç") 4))
(should (= (string-width "הַרְבֵּה אַהֲבָה") 9))
(should (= (string-width "1234" 1 3) 2))
(should (= (string-width "1234" nil -1) 3))
(should (= (string-width "1234" 2) 2))
(should-error (string-width "1234" nil 5))
(should-error (string-width "1234" -5))
(should (= (string-width "12\t34") (+ 4 tab-width)))
(should (= (string-width "1234\t56") (+ 6 tab-width)))
(should (= (string-width "áëòç") 4))
(should (= (string-width "áëòç" nil 3) 3))
(should (= (string-width "áëòç" 1 3) 2))
(should (= (string-width "áëòç" nil 2) 1))
(should (= (string-width "áëòç" nil 3) 2))
(should (= (string-width "áëòç" nil 4) 2))
(should (= (string-width "הַרְבֵּה אַהֲבָה") 9))
(should (= (string-width "הַרְבֵּה אַהֲבָה" nil 8) 4)))
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