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|
;;; shr-tests.el --- tests for shr.el -*- lexical-binding: t; -*-
;; Copyright (C) 2016-2025 Free Software Foundation, Inc.
;; Author: Lars Ingebrigtsen <larsi@gnus.org>
;; 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)
(require 'ert-x)
(require 'shr)
(declare-function libxml-parse-html-region "xml.c")
(defvar shr-test--max-wait-time 5
"The maximum amount of time to wait for a condition to resolve, in seconds.
See `shr-test-wait-for'.")
(defun shr-test-wait-for (predicate &optional message)
"Wait until PREDICATE returns non-nil.
If this takes longer than `shr-test--max-wait-time', raise an error.
MESSAGE is an optional message to use if this times out."
(let ((start (current-time))
(message (or message "timed out waiting for condition")))
(while (not (funcall predicate))
(when (> (float-time (time-since start))
shr-test--max-wait-time)
(error message))
(sit-for 0.1))))
(defun shr-test--rendering-check (name &optional context)
"Render NAME.html and compare it to NAME.txt.
Raise a test failure if the rendered buffer does not match NAME.txt.
Append CONTEXT to the failure data, if non-nil."
(let ((text-file (file-name-concat (ert-resource-directory) (concat name ".txt")))
(html-file (file-name-concat (ert-resource-directory) (concat name ".html")))
(description (if context (format "%s (%s)" name context) name))
(coding-system-for-read 'utf-8))
(with-temp-buffer
(insert-file-contents html-file)
(let ((dom (libxml-parse-html-region (point-min) (point-max)))
(shr-width 80)
(shr-use-fonts nil))
(erase-buffer)
(shr-insert-document dom)
(let ((result (buffer-substring-no-properties (point-min) (point-max)))
(expected
(with-temp-buffer
(insert-file-contents text-file)
(while (re-search-forward "%\\([0-9A-F][0-9A-F]\\)" nil t)
(replace-match (string (string-to-number (match-string 1) 16))
t t))
(buffer-string))))
(unless (equal result expected)
(ert-fail (list description result expected))))))))
(defconst shr-test--rendering-extra-configs
'(("blockquote"
;; Make sure blockquotes remain indented even when filling is
;; disabled (bug#69555).
. ((shr-fill-text . nil))))
"Extra customizations which can impact rendering.
This is a list of (NAME . SETTINGS) pairs. NAME is the basename of a
set of txt/html files under shr-resources/, as passed to `shr-test'.
SETTINGS is a list of (OPTION . VALUE) pairs that are interesting to
validate for the NAME testcase.
The `rendering' testcase will test NAME once without altering any
settings, then once more for each (OPTION . VALUE) pair.")
;;; Tests:
(ert-deftest rendering ()
(skip-unless (fboundp 'libxml-parse-html-region))
(dolist (file (directory-files (ert-resource-directory) nil "\\.html\\'"))
(let* ((name (string-remove-suffix ".html" file))
(extra-options (alist-get name shr-test--rendering-extra-configs
nil nil 'string=)))
;; Test once with default settings.
(shr-test--rendering-check name)
;; Test once more for every extra option for this specific NAME.
(pcase-dolist (`(,option-sym ,option-val)
extra-options)
(let ((option-old (symbol-value option-sym)))
(set option-sym option-val)
(unwind-protect
(shr-test--rendering-check
name (format "with %s %s" option-sym option-val))
(set option-sym option-old)))))))
(ert-deftest use-cookies ()
(let ((shr-cookie-policy 'same-origin))
(should
(shr--use-cookies-p "http://images.fsf.org" '("http://www.fsf.org")))
(should
(shr--use-cookies-p "http://www.fsf.org" '("https://www.fsf.org")))
(should
(shr--use-cookies-p "http://www.fsf.org" '("https://www.fsf.org")))
(should
(shr--use-cookies-p "http://www.fsf.org" '("http://fsf.org")))
(should-not
(shr--use-cookies-p "http://www.gnu.org" '("http://www.fsf.org")))))
(ert-deftest shr-srcset ()
(should (equal (shr--parse-srcset "") nil))
(should (equal (shr--parse-srcset "a 10w, b 20w")
'(("b" 20) ("a" 10))))
(should (equal (shr--parse-srcset "a 10w b 20w")
'(("a" 10))))
(should (equal (shr--parse-srcset "https://example.org/1\n\n 10w , https://example.org/2 20w ")
'(("https://example.org/2" 20) ("https://example.org/1" 10))))
(should (equal (shr--parse-srcset "https://example.org/1,2\n\n 10w , https://example.org/2 20w ")
'(("https://example.org/2" 20) ("https://example.org/1,2" 10)))))
(ert-deftest shr-test/zoom-image ()
"Test that `shr-zoom-image' properly replaces the original image."
(skip-unless (and (bound-and-true-p image-types)
(image-type-available-p 'png)
(fboundp 'libxml-parse-html-region)))
(let* ((image (expand-file-name "data/image/blank-100x200.png"
(getenv "EMACS_TEST_DIRECTORY")))
(image-url (concat "file://" (if (string-prefix-p "/" image)
image (concat "/" image)))))
(dolist (alt '(nil "" "nothing to see here"))
(with-temp-buffer
(ert-info ((format "image with alt=%S" alt))
(let ((attrs (if alt (format " alt=\"%s\"" alt) "")))
(insert (format "<img src=\"%s\" %s" image-url attrs)))
(cl-letf* (;; Pretend we're a graphical display.
((symbol-function 'display-graphic-p) #'always)
((symbol-function 'url-queue-retrieve)
(lambda (&rest args)
(apply #'run-at-time 0 nil #'url-retrieve args)))
(put-image-calls 0)
(shr-put-image-function
(lambda (&rest args)
(cl-incf put-image-calls)
(apply #'shr-put-image args)))
(shr-width 80)
(shr-use-fonts nil)
(shr-image-animate nil)
(inhibit-message t)
(dom (libxml-parse-html-region (point-min) (point-max))))
;; Render the document.
(erase-buffer)
(shr-insert-document dom)
(shr-test-wait-for (lambda () (= put-image-calls 1))
"Timed out waiting for initial load")
;; Now zoom the image.
(goto-char (point-min))
(shr-zoom-image)
(shr-test-wait-for (lambda () (= put-image-calls 2))
"Timed out waiting to zoom image")
;; Check that we got a sliced image.
(let ((slice-count 0))
(goto-char (point-min))
(while (< (point) (point-max))
(when-let ((display (get-text-property (point) 'display)))
;; If this is nil, we found a non-sliced image, but we
;; should have replaced that!
(should (assq 'slice display))
(cl-incf slice-count))
(goto-char (or (next-single-property-change (point) 'display)
(point-max))))
;; Make sure we actually saw a slice.
(should (> slice-count 1)))))))))
(require 'shr)
;;; shr-tests.el ends here
|
