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// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
// Copyright (C) 2024 Igalia, S.L. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-temporal.zoneddatetime.prototype.until
description: >
Up to 3 intermediate instants may be tried when calculating ZonedDateTime
difference
includes: [compareArray.js, temporalHelpers.js]
features: [BigInt, Temporal]
---*/
const calls = [];
const springFallZone = TemporalHelpers.springForwardFallBackTimeZone();
TemporalHelpers.observeMethod(calls, springFallZone, "getPossibleInstantsFor");
const dateLineZone = TemporalHelpers.crossDateLineTimeZone();
TemporalHelpers.observeMethod(calls, dateLineZone, "getPossibleInstantsFor");
const zdt1 = new Temporal.ZonedDateTime(946722600_000_000_000n /* = 2000-01-01T02:30 local */, springFallZone);
// Past -> future, without wall-clock overshoot
// Expects valid intermediate Instant WITHOUT day correction (computed once)
{
const zdt2 = new Temporal.ZonedDateTime(949442400_000_000_000n /* = 2000-02-01T14:00 local */, springFallZone);
const result = zdt1.until(zdt2, { largestUnit: "years" });
TemporalHelpers.assertDuration(result, 0, 1, 0, 0, 11, 30, 0, 0, 0, 0, "no wall-clock overshoot, no DST");
assert.compareArray(calls, [
"call getPossibleInstantsFor", // first intermediate in DifferenceZonedDateTime
], "one intermediate should be tried");
}
calls.splice(0); // clear
// Past -> future, WITH wall-clock overshoot
// Expects valid intermediate Instant with guaranteed 1-DAY correction (computed once)
{
const zdt2 = new Temporal.ZonedDateTime(949395600_000_000_000n /* = 2000-02-01T01:00 local */, springFallZone);
const result = zdt1.until(zdt2, { largestUnit: "years" });
TemporalHelpers.assertDuration(result, 0, 0, 0, 30, 22, 30, 0, 0, 0, 0, "wall-clock overshoot, no DST");
assert.compareArray(calls, [
"call getPossibleInstantsFor", // first intermediate in DifferenceZonedDateTime
], "one intermediate should be tried");
}
calls.splice(0); // clear
// Past -> future, WITH wall-clock overshoot
// Tries intermediate Instant with 1-DAY correction (first compute)
// Then, ANOTHER correction because updated intermediate Instant falls within spring DST gap,
// pushing it forward, causing wall-clock overshoot again
// (Not possible when going backwards)
{
const zdt2 = new Temporal.ZonedDateTime(954669600_000_000_000n /* = 2000-04-02T02:00 local */, springFallZone);
const result = zdt1.until(zdt2, { largestUnit: "years" });
TemporalHelpers.assertDuration(result, 0, 3, 0, 0, 23, 30, 0, 0, 0, 0, "wall-clock overshoot, small consiquential DST");
assert.compareArray(calls, [
"call getPossibleInstantsFor", // first intermediate in DifferenceZonedDateTime
"call getPossibleInstantsFor", // DisambiguatePossibleInstants on first intermediate
"call getPossibleInstantsFor", // second intermediate in DifferenceZonedDateTime
], "two intermediates should be tried, with disambiguation");
}
calls.splice(0); // clear
// Past -> future, WITH wall-clock overshoot
// Tries intermediate Instant with 1-DAY correction (first compute)
// Then, ANOTHER correction because updated intermediate Instant falls within dateline DST gap,
// pushing it forward, causing wall-clock overshoot again
// (Not possible when going backwards)
// (This test is just the same as the corresponding one in since(), but negative)
{
const start = new Temporal.ZonedDateTime(1325102400_000_000_000n /* = 2011-12-28T10:00 local */, dateLineZone);
const end = new Temporal.ZonedDateTime(1325257200_000_000_000n /* = 2011-12-31T05:00 local */, dateLineZone);
const result = start.until(end, { largestUnit: "days" });
TemporalHelpers.assertDuration(result, 0, 0, 0, 1, 19, 0, 0, 0, 0, 0, "wall-clock overshoot, big consiquential DST");
assert.compareArray(calls, [
"call getPossibleInstantsFor", // first intermediate in DifferenceZonedDateTime
"call getPossibleInstantsFor", // second intermediate in DifferenceZonedDateTime
"call getPossibleInstantsFor", // DisambiguatePossibleInstants on second intermediate
], "two intermediates should be tried, with disambiguation");
}
reportCompare(0, 0);
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