JSTests/test262/test/built-ins/Temporal/PlainDate/from/calendar-temporal-object.js

// Copyright (C) 2021 Igalia, S.L. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
esid: sec-temporal.plaindate.from
description: Fast path for converting other Temporal objects to Temporal.Calendar by reading internal slots
info: |
    sec-temporal.plaindate.from step 3:
      3. Return ? ToTemporalDate(_item_, _options_).
    sec-temporal-totemporaldate step 2.c:
      c. Let _calendar_ be ? GetTemporalCalendarWithISODefault(_item_).
    sec-temporal-gettemporalcalendarwithisodefault step 2:
      2. Return ? ToTemporalCalendarWithISODefault(_calendar_).
    sec-temporal-totemporalcalendarwithisodefault step 2:
      3. Return ? ToTemporalCalendar(_temporalCalendarLike_).
    sec-temporal-totemporalcalendar step 1.a:
      a. If _temporalCalendarLike_ has an [[InitializedTemporalDate]], [[InitializedTemporalDateTime]], [[InitializedTemporalMonthDay]], [[InitializedTemporalYearMonth]], or [[InitializedTemporalZonedDateTime]] internal slot, then
        i. Return _temporalCalendarLike_.[[Calendar]].
includes: [compareArray.js, temporalHelpers.js]
features: [Temporal]
---*/

TemporalHelpers.checkToTemporalCalendarFastPath((temporalObject, calendar) => {
  const result = Temporal.PlainDate.from({ year: 2000, month: 5, day: 2, calendar: temporalObject });
  assert.sameValue(result.calendar, calendar, "Temporal object coerced to calendar");
});