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77a34cf93f
This copies over the tests that previously existed in the tc39/proposal-temporal repository. For context, see thread starting at: https://github.com/tc39/test262/issues/3002#issuecomment-926234480 In service of https://github.com/tc39/test262/issues/3002
26 lines
1.1 KiB
JavaScript
26 lines
1.1 KiB
JavaScript
// Copyright (C) 2021 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.compare
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description: A pre-epoch value is handled correctly by the modulo operation in GetISOPartsFromEpoch
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info: |
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sec-temporal-getisopartsfromepoch step 1:
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1. Let _remainderNs_ be the mathematical value whose sign is the sign of _epochNanoseconds_ and whose magnitude is abs(_epochNanoseconds_) modulo 10<sup>6</sup>.
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sec-temporal-builtintimezonegetplaindatetimefor step 2:
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2. Let _result_ be ! GetISOPartsFromEpoch(_instant_.[[Nanoseconds]]).
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features: [Temporal]
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---*/
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const zoned = new Temporal.ZonedDateTime(-13849764_999_999_999n, "UTC");
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const plain = new Temporal.PlainDateTime(1969, 7, 24, 16, 50, 35, 0, 0, 1);
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// This code path shows up anywhere we convert an exact time, before the Unix
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// epoch, with nonzero microseconds or nanoseconds, into a wall time.
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const result1 = Temporal.PlainDateTime.compare(plain, zoned);
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assert.sameValue(result1, 0);
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const result2 = Temporal.PlainDateTime.compare(zoned, plain);
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assert.sameValue(result2, 0);
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