;;; gv-tests.el --- unit tests for gv.el             -*- lexical-binding: t; -*-

;; Copyright (C) 2017 Free Software Foundation, Inc.

;; 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:

;; Unit tests for lisp/emacs-lisp/gv.el.

;;; Code:

(defvar gv-tests--var 'default "Test variable.")

(ert-deftest gv-tests--bug26624 ()
  "Checks that Bug#26624 is fixed."
  (with-temp-buffer
    (let ((var-calls 0) (buf-calls 0))
      (should (equal (buffer-local-value 'gv-tests--var (current-buffer))
                     'default))
      (should-not (local-variable-p 'gv-tests--var))
      (should-not (local-variable-if-set-p 'gv-tests--var))
      (cl-letf (((buffer-local-value
                  (progn (cl-incf var-calls) 'gv-tests--var)
                  (progn (cl-incf buf-calls) (current-buffer)))
                 'unbound))
        (should (equal (buffer-local-value 'gv-tests--var (current-buffer))
                       'unbound))
        (should (local-variable-p 'gv-tests--var))
        (should (local-variable-if-set-p 'gv-tests--var)))
      (should (equal (buffer-local-value 'gv-tests--var (current-buffer))
                     'default))
      (should-not (local-variable-p 'gv-tests--var))
      (should-not (local-variable-if-set-p 'gv-tests--var))
      (should (equal var-calls 1))
      (should (equal buf-calls 1)))))

;;; gv-tests.el ends here