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diff --git a/test/lisp/cedet/cedet-files-tests.el b/test/lisp/cedet/cedet-files-tests.el
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+;;; cedet-files-tests.el --- Tests for cedet-files.el  -*- lexical-binding:t -*-
+
+;; Copyright (C) 2008-2022 Free Software Foundation, Inc.
+
+;; Author: Eric M. Ludlam <zappo@gnu.org>
+
+;; 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:
+
+;; Moved here from test/manual/cedet/cedet-utests.el
+
+;;; Code:
+
+(require 'ert)
+(require 'cedet-files)
+
+(defvar cedet-files-utest-list
+  '(("/home/me/src/myproj/src/foo.c" . "!home!me!src!myproj!src!foo.c")
+    ("c:/work/myproj/foo.el" . "!drive_c!work!myproj!foo.el")
+    ("//windows/proj/foo.java" . "!!windows!proj!foo.java")
+    ("/home/me/proj!bang/foo.c" . "!home!me!proj!!bang!foo.c"))
+  "List of file names to test.
+Each entry is a cons cell of (FNAME . CONVERTED)
+where FNAME is some file name, and CONVERTED is what it should be
+converted into.")
+
+(ert-deftest cedet-files-utest ()
+  "Test some file name conversions."
+  (dolist (FT cedet-files-utest-list)
+    (let ((dir->file (cedet-directory-name-to-file-name (car FT) t))
+          (file->dir (cedet-file-name-to-directory-name (cdr FT) t)))
+      (should (string= (cdr FT) dir->file))
+      (should (string= file->dir (car FT))))))
+
+(provide 'cedet-files-tests)
+
+;;; cedet-files-tests.el ends here