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;;; test-calendar-sync--localize-parsed-datetime.el --- Tests for datetime localization -*- lexical-binding: t; -*-
;;; Commentary:
;; Tests for calendar-sync--localize-parsed-datetime.
;; Dispatches to UTC or TZID conversion, or passes through unchanged.
;;; Code:
(require 'ert)
(require 'testutil-calendar-sync)
(require 'calendar-sync)
;;; Normal Cases
(ert-deftest test-calendar-sync--localize-parsed-datetime-normal-utc ()
"UTC flag triggers conversion via convert-utc-to-local."
(let ((parsed '(2026 3 15 18 0)))
(let ((result (calendar-sync--localize-parsed-datetime parsed t nil)))
(should (= 5 (length result)))
;; Hour should differ from 18 unless we're in UTC
(let ((tz-offset (car (current-time-zone))))
(unless (= tz-offset 0)
(should-not (= 18 (nth 3 result))))))))
(ert-deftest test-calendar-sync--localize-parsed-datetime-normal-tzid ()
"TZID triggers conversion via convert-tz-to-local."
(let ((parsed '(2026 3 15 14 0)))
(let ((result (calendar-sync--localize-parsed-datetime parsed nil "America/New_York")))
(should (= 5 (length result))))))
(ert-deftest test-calendar-sync--localize-parsed-datetime-normal-local-passthrough ()
"No UTC, no TZID — returns parsed unchanged."
(let ((parsed '(2026 3 15 14 0)))
(should (equal parsed (calendar-sync--localize-parsed-datetime parsed nil nil)))))
;;; Boundary Cases
(ert-deftest test-calendar-sync--localize-parsed-datetime-boundary-date-only ()
"Date-only (nil hour/minute) with UTC uses 0 for time components."
(let ((parsed '(2026 3 15 nil nil)))
(let ((result (calendar-sync--localize-parsed-datetime parsed t nil)))
(should (= 5 (length result))))))
;;; Error Cases
(ert-deftest test-calendar-sync--localize-parsed-datetime-error-bad-tzid-fallback ()
"Invalid TZID falls back to returning parsed unchanged."
(let ((parsed '(2026 3 15 14 0)))
(let ((result (calendar-sync--localize-parsed-datetime parsed nil "Fake/Timezone")))
;; convert-tz-to-local returns nil for bad TZID, so fallback to parsed
(should (= 5 (length result))))))
(provide 'test-calendar-sync--localize-parsed-datetime)
;;; test-calendar-sync--localize-parsed-datetime.el ends here
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