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ac19506a01
Where possible, observable calls originating from within Temporal, that
require an options argument, should pass `undefined` as that options
argument, rather than `{}` or `Object.create(null)`.
See tc39/proposal-temporal#1685.
33 lines
1.4 KiB
JavaScript
33 lines
1.4 KiB
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.plainyearmonth.compare
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description: >
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Calendar.yearMonthFromFields method is called with undefined as the options
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value when call originates internally
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includes: [temporalHelpers.js]
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features: [Temporal]
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---*/
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const calendar = TemporalHelpers.calendarFromFieldsUndefinedOptions();
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Temporal.PlainYearMonth.compare({ year: 2000, month: 5, calendar }, { year: 2000, month: 6, calendar });
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assert.sameValue(calendar.yearMonthFromFieldsCallCount, 2);
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// Test again, but overriding the global Temporal.Calendar.prototype method so
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// we can observe the call to yearMonthFromFields() on the ISO8601 calendar
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// that occurs when we parse the string
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const realYearMonthFromFields = Temporal.Calendar.prototype.yearMonthFromFields;
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let yearMonthFromFieldsCallCount = 0;
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Temporal.Calendar.prototype.yearMonthFromFields = function (fields, options) {
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yearMonthFromFieldsCallCount++;
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assert.sameValue(options, undefined, "yearMonthFromFields shouldn't be called with options");
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return realYearMonthFromFields.call(this, fields, options);
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}
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Temporal.PlainYearMonth.compare("2000-05-01", "2000-06-01");
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assert.sameValue(yearMonthFromFieldsCallCount, 2);
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Temporal.Calendar.prototype.yearMonthFromFields = realYearMonthFromFields;
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