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// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
// Copyright (C) 2023 Igalia, S.L. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-temporal.calendar.prototype.dateuntil
description: If a calendar's fields() method returns duplicate field names, PrepareTemporalFields should throw a RangeError.
includes: [temporalHelpers.js]
features: [Temporal]
---*/
for (const extra_fields of [['foo', 'foo'], ['day'], ['month'], ['monthCode'], ['year']]) {
const calendar = TemporalHelpers.calendarWithExtraFields(extra_fields);
const arg = { year: 2023, month: 5, monthCode: 'M05', day: 1, calendar: calendar };
const instance = new Temporal.Calendar("iso8601");
assert.throws(RangeError, () => instance.dateUntil(arg, new Temporal.PlainDate(1977, 11, 19)));
assert.throws(RangeError, () => instance.dateUntil(new Temporal.PlainDate(1977, 11, 19), arg));
}
reportCompare(0, 0);
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