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diff --git a/test/lisp/vc/vc-hg.el b/test/lisp/vc/vc-hg.el
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+;;; vc-hg.el --- tests for vc/vc-hg.el
+
+;; Copyright (C) 2016 Free Software Foundation, Inc.
+
+;; Author: Dmitry Gutov <dgutov@yandex.ru>
+;; Maintainer: emacs-devel@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 <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;; Code:
+
+(require 'vc-hg)
+(require 'vc-annotate)
+
+(ert-deftest vc-hg-annotate-extract-revision-at-line-with-filename ()
+  ;; with filename
+  (with-temp-buffer
+    (save-excursion (insert "215 2007-06-20 CONTENTS:"))
+    (should (equal (vc-hg-annotate-extract-revision-at-line)
+                   (cons
+                    "215"
+                    (expand-file-name "CONTENTS"))))))
+
+(ert-deftest vc-hg-annotate-extract-revision-at-line-with-user ()
+  (with-temp-buffer
+    (save-excursion (insert " gerv 107217 2012-09-17:"))
+    (should (equal (vc-hg-annotate-extract-revision-at-line)
+                   "107217"))))
+
+(ert-deftest vc-hg-annotate-extract-revision-at-line-with-both ()
+  (with-temp-buffer
+    (save-excursion (insert "philringnalda 218075 2014-11-28   CLOBBER:"))
+    (should (equal (vc-hg-annotate-extract-revision-at-line)
+                   (cons
+                    "218075"
+                    (expand-file-name "CLOBBER"))))))
+
+(ert-deftest vc-hg-annotate-time ()
+  (with-temp-buffer
+    (save-excursion (insert "philringnalda 218075 2014-11-28 CLOBBER:"))
+    (should (floatp (vc-hg-annotate-time)))))
+
+;;; vc-hg.el ends here