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;;; lunar-tests.el --- tests for calendar/lunar.el -*- lexical-binding:t -*-
;; Copyright (C) 2020 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 "Urbana, IL")
(calendar-time-zone -360)
(calendar-standard-time-zone-name "CST")
(calendar-time-display-form '(12-hours ":" minutes am-pm)))
,@body))
(ert-deftest lunar-test-phase ()
(with-lunar-test
(should (equal (lunar-phase 1)
'((1 7 1900) "11:40pm" 1 "")))))
(ert-deftest lunar-test-eclipse-check ()
(with-lunar-test
(should (equal (eclipse-check 1 1) "** Eclipse **"))))
;; This fails in certain time zones.
;; Eg TZ=America/Phoenix make lisp/calendar/lunar-tests
;; Similarly with TZ=UTC.
;; Daylight saving related?
(ert-deftest lunar-test-phase-list ()
:tags '(:unstable)
(with-lunar-test
(should (equal (lunar-phase-list 3 1871)
'(((3 20 1871) "11:03pm" 0 "")
((3 29 1871) "1:46am" 1 "** Eclipse **")
((4 5 1871) "9:20am" 2 "")
((4 12 1871) "12:57am" 3 "** Eclipse possible **")
((4 19 1871) "2:06pm" 0 "")
((4 27 1871) "6:49pm" 1 "")
((5 4 1871) "5:57pm" 2 "")
((5 11 1871) "9:29am" 3 "")
((5 19 1871) "5:46am" 0 "")
((5 27 1871) "8:02am" 1 ""))))))
(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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