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;;; test-calendar-sync--parse-ics-datetime.el --- Tests for iCal datetime parser -*- lexical-binding: t; -*-
;;; Commentary:
;; Tests for calendar-sync--parse-ics-datetime.
;; Covers three formats: UTC datetime (Z suffix), local datetime, date-only.
;;; Code:
(require 'ert)
(require 'testutil-calendar-sync)
(require 'calendar-sync)
;;; Normal Cases
(ert-deftest test-calendar-sync--parse-ics-datetime-normal-utc ()
"UTC datetime (Z suffix) returns (year month day hour minute)."
(let ((result (calendar-sync--parse-ics-datetime "20260203T090000Z")))
(should (equal '(2026 2 3 9 0) result))))
(ert-deftest test-calendar-sync--parse-ics-datetime-normal-local ()
"Local datetime (no Z) returns (year month day hour minute)."
(let ((result (calendar-sync--parse-ics-datetime "20260315T143000")))
(should (equal '(2026 3 15 14 30) result))))
(ert-deftest test-calendar-sync--parse-ics-datetime-normal-date-only ()
"Date-only returns (year month day nil nil)."
(let ((result (calendar-sync--parse-ics-datetime "20260203")))
(should (equal '(2026 2 3 nil nil) result))))
;;; Boundary Cases
(ert-deftest test-calendar-sync--parse-ics-datetime-boundary-midnight ()
"Midnight is parsed as hour 0, minute 0."
(let ((result (calendar-sync--parse-ics-datetime "20260101T000000Z")))
(should (equal '(2026 1 1 0 0) result))))
(ert-deftest test-calendar-sync--parse-ics-datetime-boundary-end-of-day ()
"23:59 is parsed correctly."
(let ((result (calendar-sync--parse-ics-datetime "20261231T235900")))
(should (equal '(2026 12 31 23 59) result))))
;;; Error Cases
(ert-deftest test-calendar-sync--parse-ics-datetime-error-nil ()
"Nil input returns nil."
(should (null (calendar-sync--parse-ics-datetime nil))))
(ert-deftest test-calendar-sync--parse-ics-datetime-error-empty-string ()
"Empty string returns nil."
(should (null (calendar-sync--parse-ics-datetime ""))))
(provide 'test-calendar-sync--parse-ics-datetime)
;;; test-calendar-sync--parse-ics-datetime.el ends here
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