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diff --git a/test/lisp/cedet/semantic/format-tests.el b/test/lisp/cedet/semantic/format-tests.el
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+;;; semantic/format-tests.el --- Parsing / Formatting tests -*- lexical-binding:t -*-
+
+;; Copyright (C) 2003-2022 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:
+
+;; Unit tests for the formatting feature.
+;;
+;; Using test code from the tests source directory, parse the source
+;; file.  After parsing, read the comments for each signature, and
+;; make sure that the semantic-tag-format-* functions in question
+;; created the desired output.
+
+;;; Code:
+
+(require 'ert)
+(require 'ert-x)
+(require 'semantic/format)
+
+(defvar semantic-fmt-utest-file-list
+  (list (ert-resource-file "test-fmt.cpp")
+    ;; "tests/test-fmt.el" - add this when elisp is support by dflt in Emacs
+    )
+  "List of files to run unit tests in.")
+
+(ert-deftest semantic-fmt-utest ()
+  "Visit all file entries, and run formatting test. "
+  (save-current-buffer
+    (semantic-mode 1)
+    (dolist (fname semantic-fmt-utest-file-list)
+      (let ((fb (find-buffer-visiting fname))
+            (b (semantic-find-file-noselect fname))
+            (tags nil))
+        (save-current-buffer
+          (set-buffer b)
+          (should (semantic-active-p))
+          ;;(error "Cannot open %s for format tests" fname))
+
+          ;; This will force a reparse, removing any chance of semanticdb cache
+          ;; using stale data.
+          (semantic-clear-toplevel-cache)
+          ;; Force the reparse
+          (setq tags (semantic-fetch-tags))
+
+          (save-excursion
+            (while tags
+              (let* ((T (car tags))
+                     (start (semantic-tag-end T))
+                     (end (if (cdr tags)
+                              (semantic-tag-start (car (cdr tags)))
+                            (point-max)))
+                     (TESTS nil))
+                (goto-char start)
+                ;; Scan the space between tags for all test condition matches.
+                (while (re-search-forward "## \\([a-z-]+\\) \"\\([^\n\"]+\\)\"$" end t)
+                  (push (cons (match-string 1) (match-string 2)) TESTS))
+                (setq TESTS (nreverse TESTS))
+
+                (dolist (TST TESTS)
+                  (let* ( ;; For each test, convert CAR into a semantic-format-tag* fcn
+                         (sym (intern (concat "semantic-format-tag-" (car TST))))
+                         ;; Convert the desired result from a string syntax to a string.
+                         (desired (cdr TST))
+                         ;; What does the fmt function do?
+                         (actual (funcall sym T)))
+                    (when (not (string= desired actual))
+                      (should-not (list "Desired" desired
+                                        "Actual" actual
+                                        "Formatter" (car TST)))))))
+              (setq tags (cdr tags)))))
+
+        ;; If it wasn't already in memory, whack it.
+        (when (and b (not fb))
+          (kill-buffer b))))))
+
+(provide 'format-tests)
+
+;;; format-tests.el ends here