Use lexical-binding in pcmpl-linux.el and add tests

* lisp/pcmpl-linux.el: Use lexical-binding.
(pcmpl-linux-fs-modules-path-format)
(pcmpl-linux-mtab-file): New constants.
(pcmpl-linux-fs-types, pcmpl-linux-mounted-directories): Use above
new constants.
* test/lisp/pcmpl-linux-resources/fs/ext4/.keep:
* test/lisp/pcmpl-linux-resources/mtab:
* test/lisp/pcmpl-linux-tests.el: New files.

1 files changed, 51 insertions, 0 deletions

diff --git a/test/lisp/pcmpl-linux-tests.el b/test/lisp/pcmpl-linux-tests.el
new file mode 100644
index 00000000000..cf7e6288fdb
--- /dev/null
+++ b/test/lisp/pcmpl-linux-tests.el
@@ -0,0 +1,51 @@
+;;; pcmpl-linux-tests.el --- Tests for pcmpl-linux.el  -*- lexical-binding: t -*-
+
+;; Copyright (C) 2020 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 'pcmpl-linux)
+
+(defvar pcmpl-linux-tests-data-dir
+  (file-truename
+   (expand-file-name "pcmpl-linux-resources/"
+                     (file-name-directory (or load-file-name
+                                              buffer-file-name))))
+  "Base directory of pcmpl-linux-tests.el data files.")
+
+(ert-deftest pcmpl-linux-test-fs-types ()
+  (let ((pcmpl-linux-fs-modules-path-format (expand-file-name "fs"
+                                                   pcmpl-linux-tests-data-dir)))
+    ;; FIXME: Shouldn't return "." and ".."
+    (should (equal (pcmpl-linux-fs-types)
+                   '("." ".." "ext4")))))
+
+(ert-deftest pcmpl-linux-test-mounted-directories ()
+  (let ((pcmpl-linux-mtab-file (expand-file-name "mtab"
+                                      pcmpl-linux-tests-data-dir)))
+    (should (equal (pcmpl-linux-mounted-directories)
+                   '("/" "/dev" "/dev/pts" "/dev/shm" "/home/alice/.gvfs"
+                     "/lib/modules/2.6.24-16-generic/volatile" "/proc" "/sys"
+                     "/sys/kernel/security" "/var/lock" "/var/run")))))
+
+(provide 'pcmpl-linux-tests)
+
+;;; pcmpl-linux-tests.el ends here