test/src/fileio-tests.el

   1 ;;; unit tests for src/fileio.c      -*- lexical-binding: t; -*-
   2
   3 ;; Copyright 2017-2018 Free Software Foundation, Inc.
   4
   5 ;; This file is part of GNU Emacs.
   6
   7 ;; GNU Emacs is free software: you can redistribute it and/or modify
   8 ;; it under the terms of the GNU General Public License as published by
   9 ;; the Free Software Foundation, either version 3 of the License, or
  10 ;; (at your option) any later version.
  11
  12 ;; GNU Emacs is distributed in the hope that it will be useful,
  13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 ;; GNU General Public License for more details.
  16
  17 ;; You should have received a copy of the GNU General Public License
  18 ;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
  19
  20 (require 'ert)
  21
  22 (defun try-link (target link)
  23   (make-symbolic-link target link)
  24   (let* ((read-link (file-symlink-p link))
  25          (failure (unless (string-equal target read-link)
  26                     (list 'string-equal target read-link))))
  27     (delete-file link)
  28     failure))
  29
  30 (defun fileio-tests--symlink-failure ()
  31   (let* ((dir (make-temp-file "fileio" t))
  32          (link (expand-file-name "link" dir)))
  33     (unwind-protect
  34         (let (failure
  35               (char 0))
  36           (while (and (not failure) (< char 127))
  37             (setq char (1+ char))
  38             (when (and (eq system-type 'cygwin) (eq char 92))
  39               (setq char (1+ char)))
  40             (setq failure (try-link (string char) link)))
  41           (or failure
  42               (try-link "/:" link)))
  43       (delete-directory dir t))))
  44
  45 (ert-deftest fileio-tests--odd-symlink-chars ()
  46   "Check that any non-NULL ASCII character can appear in a symlink.
  47 Also check that an encoding error can appear in a symlink."
  48   ;; Some Windows versions don't support symlinks, and those which do
  49   ;; will pop up UAC elevation prompts, so we disable this test on
  50   ;; MS-Windows.
  51   (skip-unless (not (eq system-type 'windows-nt)))
  52   (should (equal nil (fileio-tests--symlink-failure))))
  53
  54 (ert-deftest fileio-tests--directory-file-name ()
  55   (should (equal (directory-file-name "/") "/"))
  56   (should (equal (directory-file-name "//") "//"))
  57   (should (equal (directory-file-name "///") "/"))
  58   (should (equal (directory-file-name "////") "/"))
  59   (should (equal (directory-file-name "/abc") "/abc"))
  60   (should (equal (directory-file-name "/abc/") "/abc"))
  61   (should (equal (directory-file-name "/abc//") "/abc")))
  62
  63 (ert-deftest fileio-tests--directory-file-name-dos-nt ()
  64   "Like fileio-tests--directory-file-name, but for DOS_NT systems."
  65   (skip-unless (memq system-type '(ms-dos windows-nt)))
  66   (should (equal (directory-file-name "d:/") "d:/"))
  67   (should (equal (directory-file-name "d://") "d:/"))
  68   (should (equal (directory-file-name "d:///") "d:/"))
  69   (should (equal (directory-file-name "d:////") "d:/"))
  70   (should (equal (directory-file-name "d:/abc") "d:/abc"))
  71   (should (equal (directory-file-name "d:/abc/") "d:/abc"))
  72   (should (equal (directory-file-name "d:/abc//") "d:/abc")))
  73
  74 (ert-deftest fileio-tests--file-name-as-directory ()
  75   (should (equal (file-name-as-directory "") "./"))
  76   (should (equal (file-name-as-directory "/") "/"))
  77   (should (equal (file-name-as-directory "//") "//"))
  78   (should (equal (file-name-as-directory "///") "///"))
  79   (should (equal (file-name-as-directory "////") "////"))
  80   (should (equal (file-name-as-directory "/abc") "/abc/"))
  81   (should (equal (file-name-as-directory "/abc/") "/abc/"))
  82   (should (equal (file-name-as-directory "/abc//") "/abc//")))
  83
  84 (ert-deftest fileio-tests--file-name-as-directory-dos-nt ()
  85   "Like fileio-tests--file-name-as-directory, but for DOS_NT systems."
  86   (skip-unless (memq system-type '(ms-dos windows-nt)))
  87   (should (equal (file-name-as-directory "d:/") "d:/"))
  88   (should (equal (file-name-as-directory "d:\\") "d:/"))
  89   (should (equal (file-name-as-directory "d://") "d://"))
  90   (should (equal (file-name-as-directory "d:///") "d:///"))
  91   (should (equal (file-name-as-directory "d:////") "d:////"))
  92   (should (equal (file-name-as-directory "d:\\\\\\\\") "d:////"))
  93   (should (equal (file-name-as-directory "d:/abc") "d:/abc/"))
  94   (should (equal (file-name-as-directory "D:\\abc") "d:/abc/"))
  95   (should (equal (file-name-as-directory "d:/abc/") "d:/abc/"))
  96   (should (equal (file-name-as-directory "D:\\abc/") "d:/abc/"))
  97   (should (equal (file-name-as-directory "D:/abc//") "d:/abc//")))