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;;; image-circular-tests.el --- test image functions with circular objects -*- lexical-binding: t; -*-
;; Copyright (C) 2019, 2021-2022 Free Software Foundation, Inc.
;; Author: Pip Cet <pipcet@gmail.com>
;; Keywords: internal
;; Human-Keywords: internal
;; 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:
;;; Code:
(require 'ert)
(ert-deftest image-test-duplicate-keywords ()
"Test that duplicate keywords in an image spec lead to rejection."
(should-error (image-size `(image :type xbm :type xbm :width 1 :height 1
:data ,(bool-vector t))
t)))
(ert-deftest image-test-circular-plist ()
"Test that a circular image spec is rejected."
(should-error
(let ((l `(image :type xbm :width 1 :height 1 :data ,(bool-vector t))))
(setcdr (last l) '#1=(:invalid . #1#))
(image-size l t))))
(ert-deftest image-test-:type-property-value ()
"Test that :type is allowed as a property value in an image spec."
(should (equal (image-size `(image :dummy :type :type xbm :width 1 :height 1
:data ,(bool-vector t))
t)
(cons 1 1))))
(ert-deftest image-test-circular-specs ()
"Test that circular image spec property values do not cause infinite recursion."
(should
(let* ((circ1 (cons :dummy nil))
(circ2 (cons :dummy nil))
(spec1 `(image :type xbm :width 1 :height 1
:data ,(bool-vector 1) :ignored ,circ1))
(spec2 `(image :type xbm :width 1 :height 1
:data ,(bool-vector 1) :ignored ,circ2)))
(setcdr circ1 circ1)
(setcdr circ2 circ2)
(and (equal (image-size spec1 t) (cons 1 1))
(equal (image-size spec2 t) (cons 1 1))))))
(provide 'image-circular-tests)
;;; image-circular-tests.el ends here.
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