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// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
// Copyright (C) 2022 André Bargull. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-temporal.zoneddatetime.prototype.round
description: >
Round smallestUnit "day" with various rounding modes.
info: |
Temporal.ZonedDateTime.prototype.round ( roundTo )
...
18. Let dayLengthNs be ℝ(endNs - startNs).
...
20. Let roundResult be ! RoundISODateTime(temporalDateTime.[[ISOYear]],
temporalDateTime.[[ISOMonth]], temporalDateTime.[[ISODay]], temporalDateTime.[[ISOHour]],
temporalDateTime.[[ISOMinute]], temporalDateTime.[[ISOSecond]],
temporalDateTime.[[ISOMillisecond]], temporalDateTime.[[ISOMicrosecond]],
temporalDateTime.[[ISONanosecond]], roundingIncrement, smallestUnit, roundingMode,
dayLengthNs).
...
RoundISODateTime ( year, month, day, hour, minute, second, millisecond, microsecond, nanosecond,
increment, unit, roundingMode [ , dayLength ] )
...
4. Let roundedTime be ! RoundTime(hour, minute, second, millisecond, microsecond, nanosecond,
increment, unit, roundingMode, dayLength).
...
RoundTime ( hour, minute, second, millisecond, microsecond, nanosecond, increment, unit,
roundingMode [ , dayLengthNs ] )
...
4. If unit is "day", then
...
b. Let quantity be (((((hour × 60 + minute) × 60 + second) × 1000 + millisecond) × 1000 +
microsecond) × 1000 + nanosecond) / dayLengthNs.
...
features: [Temporal]
---*/
class TimeZone extends Temporal.TimeZone {
#count = 0;
#nanoseconds;
constructor(nanoseconds) {
super("UTC");
this.#nanoseconds = nanoseconds;
}
getPossibleInstantsFor(dateTime) {
if (++this.#count === 2) {
return [new Temporal.Instant(this.#nanoseconds)];
}
return super.getPossibleInstantsFor(dateTime);
}
}
function test(epochNanoseconds, tomorrowEpochNanoseconds, testCases) {
for (let [roundingMode, expected] of Object.entries(testCases)) {
let timeZone = new TimeZone(tomorrowEpochNanoseconds);
let zoned = new Temporal.ZonedDateTime(epochNanoseconds, timeZone);
let result = zoned.round({ smallestUnit: "days", roundingMode });
assert.sameValue(result.epochNanoseconds, expected);
}
}
const oneDay = 24n * 60n * 60n * 1000n * 1000n * 1000n;
// Test positive divisor (dayLengthNs).
test(3n, 10n, {
ceil: oneDay,
floor: 0n,
trunc: 0n,
halfExpand: 0n,
});
test(-3n, 10n, {
ceil: 0n,
floor: -oneDay,
trunc: -oneDay,
halfExpand: 0n,
});
test(-3n, -10n, {
ceil: oneDay,
floor: 0n,
trunc: 0n,
halfExpand: 0n,
});
// Test values at int64 boundaries.
test(3n, /*INT64_MAX=*/ 9223372036854775807n, {
ceil: oneDay,
floor: 0n,
trunc: 0n,
halfExpand: 0n,
});
reportCompare(0, 0);
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