mirror of https://github.com/tc39/test262.git
26 lines
803 B
JavaScript
26 lines
803 B
JavaScript
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// 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.plainyearmonth.prototype.from
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description: >
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When calendar.fields is undefined, from() doesn't perform an
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observable array iteration to convert the property bag to PlainYearMonth
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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, calendar };
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Temporal.PlainYearMonth.from(arg);
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Array.prototype[Symbol.iterator] = oldIterator;
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