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| | ;;; eww-tests.el --- tests for eww.el -*- lexical-binding: t; -*-
;; Copyright (C) 2024 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 <https://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
(require 'ert)
(require 'eww)
(defmacro eww-test--with-mock-retrieve (&rest body)
"Evaluate BODY with a mock implementation of `eww-retrieve'.
This avoids network requests during our tests. Additionally, prepare a
temporary EWW buffer for our tests."
(declare (indent 0))
`(cl-letf (((symbol-function 'eww-retrieve)
(lambda (url callback args)
(with-temp-buffer
;; Write out an empty list of headers and the URL
;; as our body.
(insert "\n" url)
(apply callback nil args)))))
(with-temp-buffer
(eww-mode)
,@body)))
(defun eww-test--history-urls ()
(mapcar (lambda (elem) (plist-get elem :url)) eww-history))
;;; Tests:
(ert-deftest eww-test/history/new-page ()
"Test that when visiting a new page, the previous one goes into the history."
(eww-test--with-mock-retrieve
(eww "one.invalid")
(eww "two.invalid")
(should (equal (eww-test--history-urls)
'("http://one.invalid/")))
(eww "three.invalid")
(should (equal (eww-test--history-urls)
'("http://two.invalid/"
"http://one.invalid/")))))
(ert-deftest eww-test/history/back-forward ()
"Test that navigating through history just changes our history position.
See bug#69232."
(eww-test--with-mock-retrieve
(eww "one.invalid")
(eww "two.invalid")
(eww "three.invalid")
(let ((url-history '("http://three.invalid/"
"http://two.invalid/"
"http://one.invalid/")))
;; Go back one page. This should add "three.invalid" to the
;; history, making our position in the list 2.
(eww-back-url)
(should (equal (eww-test--history-urls) url-history))
(should (= eww-history-position 2))
;; Go back again.
(eww-back-url)
(should (equal (eww-test--history-urls) url-history))
(should (= eww-history-position 3))
;; At the beginning of the history, so trying to go back should
;; signal an error.
(should-error (eww-back-url))
;; Go forward once.
(eww-forward-url)
(should (equal (eww-test--history-urls) url-history))
(should (= eww-history-position 2))
;; Go forward again.
(eww-forward-url)
(should (equal (eww-test--history-urls) url-history))
(should (= eww-history-position 1))
;; At the end of the history, so trying to go forward should
;; signal an error.
(should-error (eww-forward-url)))))
(ert-deftest eww-test/history/clear-future ()
"Test that going to a new page from a historical one clears future history.
See bug#69232."
(eww-test--with-mock-retrieve
(eww "one.invalid")
(eww "two.invalid")
(eww "three.invalid")
(eww-back-url)
(eww "four.invalid")
(should (equal (eww-test--history-urls) '("http://two.invalid/"
"http://one.invalid/")))
(should (= eww-history-position 0))))
(provide 'eww-tests)
;; eww-tests.el ends here
|