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If you have a leap day, such as February 29, and you get input such as
{ monthCode: "M02", day: 30 }, { overflow: "constrain" }, then you want
the day to be constrained to the leap day February 29, not February 28
as the maximum day would be in a common year. Add tests for this case
for each supported calendar.
12 lines
436 B
JavaScript
12 lines
436 B
JavaScript
// Copyright (C) 2025 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.plainmonthday.from
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description: Properly constrain February 30 to February 29, not 28
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features: [Temporal]
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---*/
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const md = Temporal.PlainMonthDay.from({ monthCode: "M02", day: 30 }, { overflow: "constrain" });
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assert.sameValue(md.day, 29, "M02-30 should constrain to 29, not 28");
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