test_weekinfo_service.js

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/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

function run_test() {

  // Bug 1239622. The 1st of January after a leap year which ends with

  // a Thursday belongs to week number 53 unless the start of week is

  // set on Friday.

  const wkst_wknum_date = [

    [1, 53, "20210101T000000Z"], // Year 2021 affected by Bug 1239622

    [5, 1, "20210101T000000Z"], //

    [3, 53, "20490101T000000Z"], // Year 2049 affected by Bug 1239622

    [5, 1, "20490101T000000Z"], //

    [0, 1, "20170101T000000Z"], // Year that starts on Sunday ...

    [3, 52, "20180101T000000Z"], // ... Monday

    [0, 1, "20190101T000000Z"], // ... Tuesday

    [4, 52, "20200101T000000Z"], // ... Wednesday

    [0, 1, "20260101T000000Z"], // ... Thursday

    [0, 53, "20270101T000000Z"], // ... Friday

    [0, 52, "20280101T000000Z"],

  ]; // ... Saturday

  const savedWeekStart = Services.prefs.getIntPref("calendar.week.start", 0);

  for (const [weekStart, weekNumber, dateString] of wkst_wknum_date) {

    Services.prefs.setIntPref("calendar.week.start", weekStart);

    const date = cal.createDateTime(dateString);

    date.isDate = true;

    const week = cal.weekInfoService.getWeekTitle(date);

    equal(week, weekNumber, "Week number matches for " + dateString);

  Services.prefs.setIntPref("calendar.week.start", savedWeekStart);