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;;; mule-util-tests.el --- tests for international/mule-util.el -*- lexical-binding:t -*-
;; Copyright (C) 2002-2022 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:
;;; Code:
(require 'ert)
(require 'ert-x)
(require 'mule-util)
(defconst mule-util-test-truncate-data
'((("" 0) . "")
(("x" 1) . "x")
(("xy" 1) . "x")
(("xy" 2 1) . "y")
(("xy" 0) . "")
(("xy" 3) . "xy")
(("中" 0) . "")
(("中" 1) . "")
(("中" 2) . "中")
(("中" 1 nil ? ) . " ")
(("中文" 3 1 ? ) . " ")
(("x中x" 2) . "x")
(("x中x" 3) . "x中")
(("x中x" 3) . "x中")
(("x中x" 4 1) . "中x")
(("kor한e글an" 8 1 ? ) . "or한e글")
(("kor한e글an" 7 2 ? ) . "r한e ")
(("" 0 nil nil "...") . "")
(("x" 3 nil nil "...") . "x")
(("中" 3 nil nil "...") . "中")
(("foo" 3 nil nil "...") . "foo")
(("foo" 2 nil nil "...") . "fo") ;; XEmacs failure?
(("foobar" 6 0 nil "...") . "foobar")
(("foobarbaz" 6 nil nil "...") . "foo...")
(("foobarbaz" 7 2 nil "...") . "ob...")
(("foobarbaz" 9 3 nil "...") . "barbaz")
(("こhんeにlちlはo" 15 1 ? t) . " hんeにlちlはo")
(("こhんeにlちlはo" 14 1 ? t) . " hんeにlち...")
(("x" 3 nil nil "粵語") . "x")
(("中" 2 nil nil "粵語") . "中")
(("中" 1 nil ?x "粵語") . "x") ;; XEmacs error
(("中文" 3 nil ? "粵語") . "中 ") ;; XEmacs error
(("foobarbaz" 4 nil nil "粵語") . "粵語")
(("foobarbaz" 5 nil nil "粵語") . "f粵語")
(("foobarbaz" 6 nil nil "粵語") . "fo粵語")
(("foobarbaz" 8 3 nil "粵語") . "b粵語")
(("こhんeにlちlはo" 14 4 ?x "日本語") . "xeに日本語")
(("こhんeにlちlはo" 13 4 ?x "日本語") . "xex日本語")
)
"Test data for `truncate-string-to-width'.")
(defun mule-util-test-truncate-create (n)
"Create a test for element N of the `mule-util-test-truncate-data' constant."
(let ((testname (intern (format "mule-util-test-truncate-%.2d" n)))
(testdoc (format "Test element %d of `mule-util-test-truncate-data'."
n))
(testdata (nth n mule-util-test-truncate-data)))
(eval
`(ert-deftest ,testname ()
,testdoc
(let ((truncate-string-ellipsis "..."))
(should (equal (apply 'truncate-string-to-width ',(car testdata))
,(cdr testdata))))))))
(dotimes (i (length mule-util-test-truncate-data))
(mule-util-test-truncate-create i))
(ert-deftest filepos/bufferpos-tests-utf-8 ()
(let ((coding-system-for-read 'utf-8-unix))
(with-temp-buffer
(insert-file-contents (ert-resource-file "utf-8.txt"))
(should (eq buffer-file-coding-system 'utf-8-unix))
;; First line is "Thís is a test line 1.".
;; Bytes start counting at 0; chars at 1.
(should (= (filepos-to-bufferpos 1 'exact) 2))
(should (= (bufferpos-to-filepos 2 'exact) 1))
;; After non-ASCII.
(should (= (filepos-to-bufferpos 4 'exact) 4))
(should (= (bufferpos-to-filepos 4 'exact) 4)))))
(ert-deftest filepos/bufferpos-tests-binary ()
(let ((coding-system-for-read 'binary))
(with-temp-buffer
(insert-file-contents (ert-resource-file "utf-8.txt"))
(should (eq buffer-file-coding-system 'no-conversion))
;; First line is "Thís is a test line 1.".
;; Bytes start counting at 0; chars at 1.
(should (= (filepos-to-bufferpos 1 'exact) 2))
(should (= (bufferpos-to-filepos 2 'exact) 1))
;; After non-ASCII.
(should (= (filepos-to-bufferpos 4 'exact) 5))
(should (= (bufferpos-to-filepos 5 'exact) 4)))))
(ert-deftest filepos/bufferpos-tests-undecided ()
(let ((coding-system-for-read 'binary))
(with-temp-buffer
(insert-file-contents (ert-resource-file "utf-8.txt"))
(setq buffer-file-coding-system 'undecided)
(should-error (filepos-to-bufferpos 1 'exact))
(should-error (bufferpos-to-filepos 2 'exact))
(should (= (filepos-to-bufferpos 1 'approximate) 2))
(should (= (bufferpos-to-filepos 2 'approximate) 1))
;; After non-ASCII.
(should (= (filepos-to-bufferpos 4 'approximate) 5))
(should (= (bufferpos-to-filepos 5 'approximate) 4)))))
;;; mule-util-tests.el ends here
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