Add tests for image.c
* test/src/image-tests.el: New file.
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Stefan Kangas
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test/src/image-tests.el
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test/src/image-tests.el
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;;; image-tests.el --- Tests for image.c -*- lexical-binding: t -*-
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;; Copyright (C) 2021 Free Software Foundation, Inc.
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;; Author: Stefan Kangas <stefan@marxist.se>
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Most of these tests will only run in a GUI session, and not with
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;; "make check". Run them manually in an interactive session with
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;; `M-x eval-buffer' followed by `M-x ert'.
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;;; Code:
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(require 'ert)
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(defmacro image-skip-unless (format)
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`(skip-unless (and (display-images-p)
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(image-type-available-p ,format))))
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;;;; Images
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(defconst image-tests--files
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`((jpeg . ,(create-image (expand-file-name
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"test/data/image/black.jpg"
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source-directory)))
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(pbm . ,(find-image '((:file "splash.svg" :type svg))))
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(png . ,(find-image '((:file "splash.png" :type png))))
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(svg . ,(find-image '((:file "splash.pbm" :type pbm))))
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(tiff . ,(create-image (expand-file-name
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"nextstep/GNUstep/Emacs.base/Resources/emacs.tiff"
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source-directory)))
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(xbm . ,(find-image '((:file "gnus/gnus.xbm" :type xbm))))
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(xpm . ,(find-image '((:file "splash.xpm" :type xpm))))
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;; TODO: gif
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))
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;;;; image-test-size
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(ert-deftest image-tests-image-size/jpeg ()
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(image-skip-unless 'jpeg)
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(pcase (image-size (cdr (assq 'jpeg image-tests--files)))
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(`(,a . ,b)
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(should (floatp a))
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(should (floatp b)))))
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(ert-deftest image-tests-image-size/pbm ()
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(image-skip-unless 'pbm)
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(pcase (image-size (cdr (assq 'pbm image-tests--files)))
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(`(,a . ,b)
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(should (floatp a))
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(should (floatp b)))))
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(ert-deftest image-tests-image-size/png ()
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(image-skip-unless 'png)
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(pcase (image-size (cdr (assq 'png image-tests--files)))
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(`(,a . ,b)
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(should (floatp a))
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(should (floatp b)))))
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(ert-deftest image-tests-image-size/svg ()
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(image-skip-unless 'svg)
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(pcase (image-size (cdr (assq 'svg image-tests--files)))
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(`(,a . ,b)
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(should (floatp a))
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(should (floatp b)))))
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(ert-deftest image-tests-image-size/tiff ()
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(image-skip-unless 'tiff)
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(pcase (image-size (cdr (assq 'tiff image-tests--files)))
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(`(,a . ,b)
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(should (floatp a))
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(should (floatp b)))))
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(ert-deftest image-tests-image-size/xbm ()
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(image-skip-unless 'xbm)
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(pcase (image-size (cdr (assq 'xbm image-tests--files)))
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(`(,a . ,b)
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(should (floatp a))
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(should (floatp b)))))
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(ert-deftest image-tests-image-size/xpm ()
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(image-skip-unless 'xpm)
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(pcase (image-size (cdr (assq 'xpm image-tests--files)))
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(`(,a . ,b)
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(should (floatp a))
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(should (floatp b)))))
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(ert-deftest image-tests-image-size/error-on-invalid-spec ()
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(skip-unless (display-images-p))
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(should-error (image-size 'invalid-spec)))
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(ert-deftest image-tests-image-size/error-on-nongraphical-display ()
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(skip-unless (not (display-images-p)))
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(should-error (image-size 'invalid-spec)))
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;;;; image-mask-p
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(ert-deftest image-tests-image-mask-p/jpeg ()
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(image-skip-unless 'jpeg)
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(should-not (image-mask-p (cdr (assq 'jpeg image-tests--files)))))
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(ert-deftest image-tests-image-mask-p/pbm ()
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(image-skip-unless 'pbm)
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(should-not (image-mask-p (cdr (assq 'pbm image-tests--files)))))
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(ert-deftest image-tests-image-mask-p/png ()
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(image-skip-unless 'png)
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(should-not (image-mask-p (cdr (assq 'png image-tests--files)))))
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(ert-deftest image-tests-image-mask-p/svg ()
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(image-skip-unless 'svg)
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(should-not (image-mask-p (cdr (assq 'svg image-tests--files)))))
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(ert-deftest image-tests-image-mask-p/tiff ()
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(image-skip-unless 'tiff)
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(should-not (image-mask-p (cdr (assq 'tiff image-tests--files)))))
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(ert-deftest image-tests-image-mask-p/xbm ()
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(image-skip-unless 'xbm)
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(should-not (image-mask-p (cdr (assq 'xbm image-tests--files)))))
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(ert-deftest image-tests-image-mask-p/xpm ()
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(image-skip-unless 'xpm)
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(should-not (image-mask-p (cdr (assq 'xpm image-tests--files)))))
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(ert-deftest image-tests-image-mask-p/error-on-invalid-spec ()
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(skip-unless (display-images-p))
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(should-error (image-mask-p 'invalid-spec)))
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(ert-deftest image-tests-image-mask-p/error-on-nongraphical-display ()
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(skip-unless (not (display-images-p)))
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(should-error (image-mask-p (cdr (assq 'xpm image-tests--files)))))
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;;;; image-metadata
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;; TODO: These tests could be expanded with files that actually
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;; contain metadata.
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(ert-deftest image-tests-image-metadata/jpeg ()
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(image-skip-unless 'jpeg)
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(should-not (image-metadata (cdr (assq 'jpeg image-tests--files)))))
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(ert-deftest image-tests-image-metadata/pbm ()
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(image-skip-unless 'pbm)
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(should-not (image-metadata (cdr (assq 'pbm image-tests--files)))))
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(ert-deftest image-tests-image-metadata/png ()
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(image-skip-unless 'png)
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(should-not (image-metadata (cdr (assq 'png image-tests--files)))))
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(ert-deftest image-tests-image-metadata/svg ()
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(image-skip-unless 'svg)
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(should-not (image-metadata (cdr (assq 'svg image-tests--files)))))
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(ert-deftest image-tests-image-metadata/tiff ()
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(image-skip-unless 'tiff)
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(should-not (image-metadata (cdr (assq 'tiff image-tests--files)))))
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(ert-deftest image-tests-image-metadata/xbm ()
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(image-skip-unless 'xbm)
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(should-not (image-metadata (cdr (assq 'xbm image-tests--files)))))
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(ert-deftest image-tests-image-metadata/xpm ()
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(image-skip-unless 'xpm)
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(should-not (image-metadata (cdr (assq 'xpm image-tests--files)))))
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(ert-deftest image-tests-image-metadata/nil-on-invalid-spec ()
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(skip-unless (display-images-p))
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(should-not (image-metadata 'invalid-spec)))
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(ert-deftest image-tests-image-metadata/error-on-nongraphical-display ()
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(skip-unless (not (display-images-p)))
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(should-error (image-metadata (cdr (assq 'xpm image-tests--files)))))
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;;;; ImageMagick
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(ert-deftest image-tests-imagemagick-types ()
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(skip-unless (fboundp 'imagemagick-types))
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(when (fboundp 'imagemagick-types)
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(should (listp (imagemagick-types)))))
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;;;; Initialization
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(ert-deftest image-tests-init-image-library ()
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(should (init-image-library 'pbm)) ; built-in
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(should (init-image-library 'xpm)) ; built-in
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(should-not (init-image-library 'invalid-image-type)))
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;;; image-tests.el ends here
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