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;;; lunar-tests.el --- tests for calendar/lunar.el -*- lexical-binding:t -*-
;; Copyright (C) 2020-2023 Free Software Foundation, Inc.
;; Author: Stefan Kangas <stefankangas@gmail.com>
;; 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/>.
;;; Code:
(require 'ert)
(require 'lunar)
(defmacro with-lunar-test (&rest body)
`(let ((calendar-latitude 40.1)
(calendar-longitude -88.2)
(calendar-location-name "Paris")
(calendar-time-zone 0)
(calendar-standard-time-zone-name "UTC")
;; Make sure daylight saving is disabled to avoid interference
;; from the system settings (see bug#45818).
(calendar-daylight-savings-starts nil)
(calendar-time-display-form '(24-hours ":" minutes)))
,@body))
(ert-deftest lunar-test-phase ()
(with-lunar-test
(should (equal (lunar-phase 1)
'((1 8 1900) "05:40" 1 "")))))
(ert-deftest lunar-test-check-for-eclipse ()
(with-lunar-test
(should (equal (lunar-check-for-eclipse 10.0 1) ""))
(should (equal (lunar-check-for-eclipse 10.0 2) "** Lunar Eclipse **"))))
(ert-deftest lunar-test-phase-list ()
(with-lunar-test
(should (equal (lunar-phase-list 9 2023)
'(((9 6 2023) "22:27" 3 "")
((9 15 2023) "01:40" 0 "")
((9 22 2023) "19:33" 1 "")
((9 29 2023) "09:54" 2 "** Lunar Eclipse possible **")
((10 6 2023) "13:53" 3 "")
((10 14 2023) "17:55" 0 "** Solar Eclipse **")
((10 22 2023) "03:30" 1 "")
((10 28 2023) "20:20" 2 "** Lunar Eclipse **")
((11 5 2023) "08:42" 3 "")
((11 13 2023) "09:27" 0 "")
((11 20 2023) "10:51" 1 "")
((11 27 2023) "09:13" 2 ""))))))
(ert-deftest lunar-test-new-moon-time ()
(with-lunar-test
(should (= (round (lunar-new-moon-time 1))
2451580))))
(ert-deftest lunar-test-new-moon-on-or-after ()
(with-lunar-test
(should (= (round (lunar-new-moon-on-or-after (calendar-absolute-from-gregorian '(5 5 1818))))
664525))))
(provide 'lunar-tests)
;;; lunar-tests.el ends here
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