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01f73e96ca
See https://github.com/tc39/proposal-temporal/pull/2316 which eliminated an observable call to Array.prototype[Symbol.iterator]() in the case where a calendar's 'fields' property was undefined. The best way I've thought of to test this is to monkeypatch the Array.prototype[Symbol.iterator]() method to make it throw. In some cases, where we are actually expected to iterate the return value from a Temporal.TimeZone's getPossibleInstantsFor() method, we have to provide a custom method for that as well, that returns a non-Array iterable so we don't call the patched Array.prototype[Symbol.iterator](). This normative change reached consensus at the July 2022 TC39 plenary meeting.
26 lines
823 B
JavaScript
26 lines
823 B
JavaScript
// Copyright (C) 2022 Igalia, S.L. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-temporal.plaindatetime.prototype.compare
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description: >
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When calendar.fields is undefined, compare() doesn't perform an
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observable array iteration to convert the property bag to PlainDateTime
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features: [Temporal]
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---*/
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const calendar = new Temporal.Calendar("iso8601");
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calendar.fields = undefined;
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// Detect observable array iteration:
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const oldIterator = Array.prototype[Symbol.iterator];
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Array.prototype[Symbol.iterator] = function () {
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throw new Test262Error(`array shouldn't be iterated: ${new Error().stack}`);
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};
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const arg = { year: 1981, month: 12, day: 15, calendar };
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Temporal.PlainDateTime.compare(arg, arg);
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Array.prototype[Symbol.iterator] = oldIterator;
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