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;;; testutil-calendar-sync.el --- Test utilities for calendar-sync -*- lexical-binding: t; -*-
;;; Commentary:
;; Utilities for testing calendar-sync module, especially dynamic timestamp generation.
;; Following quality-engineer.org guidelines: no hardcoded dates!
;;; Code:
(require 'calendar)
;;; Dynamic Timestamp Generation
(defun test-calendar-sync-time-today-at (hour minute)
"Generate time for today at HOUR:MINUTE.
Returns (year month day hour minute) list suitable for tests."
(let* ((now (decode-time))
(year (nth 5 now))
(month (nth 4 now))
(day (nth 3 now)))
(list year month day hour minute)))
(defun test-calendar-sync-time-tomorrow-at (hour minute)
"Generate time for tomorrow at HOUR:MINUTE."
(let* ((tomorrow (time-add (current-time) (* 24 3600)))
(decoded (decode-time tomorrow))
(year (nth 5 decoded))
(month (nth 4 decoded))
(day (nth 3 decoded)))
(list year month day hour minute)))
(defun test-calendar-sync-time-days-from-now (days hour minute)
"Generate time for DAYS from now at HOUR:MINUTE."
(let* ((future (time-add (current-time) (* days 24 3600)))
(decoded (decode-time future))
(year (nth 5 decoded))
(month (nth 4 decoded))
(day (nth 3 decoded)))
(list year month day hour minute)))
(defun test-calendar-sync-time-days-ago (days hour minute)
"Generate time for DAYS ago at HOUR:MINUTE."
(let* ((past (time-subtract (current-time) (* days 24 3600)))
(decoded (decode-time past))
(year (nth 5 decoded))
(month (nth 4 decoded))
(day (nth 3 decoded)))
(list year month day hour minute)))
(defun test-calendar-sync-time-date-only (offset-days)
"Generate date-only timestamp for OFFSET-DAYS from now.
Returns (year month day) list for all-day events."
(let* ((future (time-add (current-time) (* offset-days 24 3600)))
(decoded (decode-time future))
(year (nth 5 decoded))
(month (nth 4 decoded))
(day (nth 3 decoded)))
(list year month day)))
;;; .ics Test Data Generation
(defun test-calendar-sync-ics-datetime (time-list)
"Convert TIME-LIST to iCal DATETIME format.
TIME-LIST is (year month day hour minute).
Returns string like '20251116T140000Z'."
(format "%04d%02d%02dT%02d%02d00Z"
(nth 0 time-list)
(nth 1 time-list)
(nth 2 time-list)
(nth 3 time-list)
(nth 4 time-list)))
(defun test-calendar-sync-ics-date (time-list)
"Convert TIME-LIST to iCal DATE format.
TIME-LIST is (year month day).
Returns string like '20251116'."
(format "%04d%02d%02d"
(nth 0 time-list)
(nth 1 time-list)
(nth 2 time-list)))
(defun test-calendar-sync-make-vevent (summary start end &optional description location)
"Create a VEVENT block for testing.
START and END are time lists from test-calendar-sync-time-* functions.
Returns .ics formatted VEVENT string."
(let* ((dtstart (if (= (length start) 5)
(test-calendar-sync-ics-datetime start)
(test-calendar-sync-ics-date start)))
(dtend (when end
(if (= (length end) 5)
(test-calendar-sync-ics-datetime end)
(test-calendar-sync-ics-date end)))))
(concat "BEGIN:VEVENT\n"
"SUMMARY:" summary "\n"
"DTSTART:" dtstart "\n"
(when dtend (concat "DTEND:" dtend "\n"))
(when description (concat "DESCRIPTION:" description "\n"))
(when location (concat "LOCATION:" location "\n"))
"END:VEVENT")))
(defun test-calendar-sync-make-ics (&rest events)
"Create complete .ics file with EVENTS.
Each event should be a VEVENT string from `test-calendar-sync-make-vevent'."
(concat "BEGIN:VCALENDAR\n"
"VERSION:2.0\n"
"PRODID:-//Test//Test//EN\n"
(string-join events "\n")
"\nEND:VCALENDAR"))
(provide 'testutil-calendar-sync)
;;; testutil-calendar-sync.el ends here
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