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+;;; abbrev-tests.el --- Test suite for abbrevs  -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2015 Free Software Foundation, Inc.
+
+;; Author: Eli Zaretskii <eliz@gnu.org>
+;; Keywords: abbrevs
+
+;; 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 'ert)
+(require 'abbrev)
+
+(ert-deftest abbrev-table-p-test ()
+  (should-not (abbrev-table-p 42))
+  (should-not (abbrev-table-p "aoeu"))
+  (should-not (abbrev-table-p '()))
+  (should-not (abbrev-table-p []))
+  ;; Missing :abbrev-table-modiff counter:
+  (should-not (abbrev-table-p (obarray-make)))
+  (let* ((table (obarray-make)))
+    (abbrev-table-put table :abbrev-table-modiff 42)
+    (should (abbrev-table-p table))))
+
+(ert-deftest abbrev-make-abbrev-table-test ()
+  ;; Table without properties:
+  (let ((table (make-abbrev-table)))
+    (should (abbrev-table-p table))
+    (should (= (length table) obarray-default-size)))
+  ;; Table with one property 'foo with value 'bar:
+  (let ((table (make-abbrev-table '(foo bar))))
+    (should (abbrev-table-p table))
+    (should (= (length table) obarray-default-size))
+    (should (eq (abbrev-table-get table 'foo) 'bar))))
+
+(ert-deftest abbrev-table-get-put-test ()
+  (let ((table (make-abbrev-table)))
+    (should-not (abbrev-table-get table 'foo))
+    (should (= (abbrev-table-put table 'foo 42) 42))
+    (should (= (abbrev-table-get table 'foo) 42))
+    (should (eq (abbrev-table-put table 'foo 'bar) 'bar))
+    (should (eq (abbrev-table-get table 'foo) 'bar))))
+
+(ert-deftest copy-abbrev-table-test ()
+  (defvar foo-abbrev-table nil)         ; Avoid compiler warning
+  (define-abbrev-table 'foo-abbrev-table
+    '())
+  (should (abbrev-table-p foo-abbrev-table))
+  ;; Bug 21828
+  (let ((new-foo-abbrev-table
+         (condition-case nil
+             (copy-abbrev-table foo-abbrev-table)
+           (error nil))))
+    (should (abbrev-table-p new-foo-abbrev-table)))
+  (should-not (string-equal (buffer-name) "*Backtrace*")))
+
+(provide 'abbrev-tests)
+;;; abbrev-tests.el ends here