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+;;; core-elisp-tests.el --- Testing some core Elisp rules
+
+;; Copyright (C) 2013-2017 Free Software Foundation, Inc.
+
+;; Author: Stefan Monnier <monnier@iro.umontreal.ca>
+;; Keywords:
+
+;; This program 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.
+
+;; This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;
+
+;;; Code:
+
+(ert-deftest core-elisp-tests-1-defvar-in-let ()
+  "Test some core Elisp rules."
+  (with-temp-buffer
+    ;; Check that when defvar is run within a let-binding, the toplevel default
+    ;; is properly initialized.
+    (should (equal (list (let ((c-e-x 1)) (defvar c-e-x 2) c-e-x) c-e-x)
+                   '(1 2)))
+    (should (equal (list (let ((c-e-x 1))
+                           (defcustom c-e-x 2 "doc" :group 'blah :type 'integer) c-e-x)
+                         c-e-x)
+                   '(1 2)))))
+
+(ert-deftest core-elisp-tests-2-window-configurations ()
+  "Test properties of window-configurations."
+  (let ((wc (current-window-configuration)))
+    (with-current-buffer (window-buffer (frame-selected-window))
+      (push-mark)
+      (activate-mark))
+    (set-window-configuration wc)
+    (should (or (not mark-active) (mark)))))
+
+(ert-deftest core-elisp-tests-3-backquote ()
+  (should (eq 3 (eval ``,,'(+ 1 2)))))
+
+(provide 'core-elisp-tests)
+;;; core-elisp-tests.el ends here