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;;; test-chime--today.el --- Tests for chime--today -*- lexical-binding: t; -*-
;; Copyright (C) 2024 Craig Jennings
;; Author: Craig Jennings <c@cjennings.net>
;; This program 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.
;; This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; Unit tests for chime--today function.
;; Tests retrieving beginning of current day timestamp.
;;; Code:
;; Initialize package system for batch mode
(when noninteractive
(package-initialize))
(require 'ert)
(require 'dash)
(require 'alert)
;; Load chime from parent directory
(load (expand-file-name "../chime.el") nil t)
;;; Setup and Teardown
(defun test-chime--today-setup ()
"Setup test environment."
;; No special setup needed
)
(defun test-chime--today-teardown ()
"Teardown test environment."
;; No special teardown needed
)
;;; Normal Cases
(ert-deftest test-chime--today-normal-returns-current-date ()
"Test that chime--today returns midnight of current day."
(test-chime--today-setup)
(unwind-protect
(let* ((now (encode-time 30 45 14 8 11 2025)) ; 2025-11-08 14:45:30
(expected (encode-time 0 0 0 8 11 2025))) ; 2025-11-08 00:00:00
(cl-letf (((symbol-function 'current-time) (lambda () now)))
(should (equal (chime--today) expected))))
(test-chime--today-teardown)))
(ert-deftest test-chime--today-normal-truncates-time-component ()
"Test that chime--today zeros out hour/minute/second."
(test-chime--today-setup)
(unwind-protect
(let* ((now (encode-time 59 59 23 8 11 2025)) ; 2025-11-08 23:59:59
(result (cl-letf (((symbol-function 'current-time) (lambda () now)))
(chime--today)))
(decoded (decode-time result)))
;; Check that hour, minute, second are all 0
(should (= 0 (decoded-time-second decoded)))
(should (= 0 (decoded-time-minute decoded)))
(should (= 0 (decoded-time-hour decoded)))
;; Check date is preserved
(should (= 8 (decoded-time-day decoded)))
(should (= 11 (decoded-time-month decoded)))
(should (= 2025 (decoded-time-year decoded))))
(test-chime--today-teardown)))
;;; Boundary Cases
(ert-deftest test-chime--today-boundary-midnight-returns-correct-day ()
"Test that chime--today at midnight returns same day."
(test-chime--today-setup)
(unwind-protect
(let* ((now (encode-time 0 0 0 8 11 2025)) ; Already at midnight
(expected (encode-time 0 0 0 8 11 2025)))
(cl-letf (((symbol-function 'current-time) (lambda () now)))
(should (equal (chime--today) expected))))
(test-chime--today-teardown)))
(provide 'test-chime--today)
;;; test-chime--today.el ends here
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