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Temporal: Add basic IANA-time-zone-aware tests for TimeZone.getPlainDateTimeFor 

This adds several tests for values that should be produced by the time
zone database and should not be subject to change in the future. This
tests basic functionality of TimeZone.getPlainDateTimeFor with an IANA
time zone database.
This commit is contained in:
Philip Chimento 2022-07-28 15:55:29 -07:00 committed by Philip Chimento
parent 6b5297a142
commit 7d31aa21ad
2 changed files with 103 additions and 0 deletions
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78
test/intl402/Temporal/TimeZone/prototype/getPlainDateTimeFor/basic.js vendored Normal file
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// Copyright (C) 2022 Igalia, S.L. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-temporal.timezone.prototype.getplaindatetimefor
description: Sample of results for IANA time zones
includes: [temporalHelpers.js]
features: [Temporal]
---*/
function test(epochNs, results) {
const instant = new Temporal.Instant(epochNs);
Object.entries(results).forEach(([id, expected]) => {
const tz = new Temporal.TimeZone(id);
const dt = tz.getPlainDateTimeFor(instant);
TemporalHelpers.assertPlainDateTime(dt, ...expected, `Local time of ${instant} in ${id}`);
});
}
// Unix epoch
test(0n, {
'America/Los_Angeles': [1969, 12, "M12", 31, 16, 0, 0, 0, 0, 0],
'America/New_York': [1969, 12, "M12", 31, 19, 0, 0, 0, 0, 0],
'Africa/Monrovia': [1969, 12, "M12", 31, 23, 15, 30, 0, 0, 0],
'Europe/London': [1970, 1, "M01", 1, 1, 0, 0, 0, 0, 0],
'Europe/Berlin': [1970, 1, "M01", 1, 1, 0, 0, 0, 0, 0],
'Europe/Moscow': [1970, 1, "M01", 1, 3, 0, 0, 0, 0, 0],
'Asia/Kolkata': [1970, 1, "M01", 1, 5, 30, 0, 0, 0, 0],
'Asia/Tokyo': [1970, 1, "M01", 1, 9, 0, 0, 0, 0, 0],
});
// Just before epoch
test(-1n, {
'America/Los_Angeles': [1969, 12, "M12", 31, 15, 59, 59, 999, 999, 999],
'America/New_York': [1969, 12, "M12", 31, 18, 59, 59, 999, 999, 999],
'Africa/Monrovia': [1969, 12, "M12", 31, 23, 15, 29, 999, 999, 999],
'Europe/London': [1970, 1, "M01", 1, 0, 59, 59, 999, 999, 999],
'Europe/Berlin': [1970, 1, "M01", 1, 0, 59, 59, 999, 999, 999],
'Europe/Moscow': [1970, 1, "M01", 1, 2, 59, 59, 999, 999, 999],
'Asia/Kolkata': [1970, 1, "M01", 1, 5, 29, 59, 999, 999, 999],
'Asia/Tokyo': [1970, 1, "M01", 1, 8, 59, 59, 999, 999, 999],
});
// Just after epoch
test(1n, {
'America/Los_Angeles': [1969, 12, "M12", 31, 16, 0, 0, 0, 0, 1],
'America/New_York': [1969, 12, "M12", 31, 19, 0, 0, 0, 0, 1],
'Africa/Monrovia': [1969, 12, "M12", 31, 23, 15, 30, 0, 0, 1],
'Europe/London': [1970, 1, "M01", 1, 1, 0, 0, 0, 0, 1],
'Europe/Berlin': [1970, 1, "M01", 1, 1, 0, 0, 0, 0, 1],
'Europe/Moscow': [1970, 1, "M01", 1, 3, 0, 0, 0, 0, 1],
'Asia/Kolkata': [1970, 1, "M01", 1, 5, 30, 0, 0, 0, 1],
'Asia/Tokyo': [1970, 1, "M01", 1, 9, 0, 0, 0, 0, 1],
});
// Hours before epoch
test(-6300_000_000_001n, {
'America/Los_Angeles': [1969, 12, "M12", 31, 14, 14, 59, 999, 999, 999],
'America/New_York': [1969, 12, "M12", 31, 17, 14, 59, 999, 999, 999],
'Africa/Monrovia': [1969, 12, "M12", 31, 21, 30, 29, 999, 999, 999],
'Europe/London': [1969, 12, "M12", 31, 23, 14, 59, 999, 999, 999],
'Europe/Berlin': [1969, 12, "M12", 31, 23, 14, 59, 999, 999, 999],
'Europe/Moscow': [1970, 1, "M01", 1, 1, 14, 59, 999, 999, 999],
'Asia/Kolkata': [1970, 1, "M01", 1, 3, 44, 59, 999, 999, 999],
'Asia/Tokyo': [1970, 1, "M01", 1, 7, 14, 59, 999, 999, 999],
});
// Hours after epoch
test(6300_000_000_001n, {
'America/Los_Angeles': [1969, 12, "M12", 31, 17, 45, 0, 0, 0, 1],
'America/New_York': [1969, 12, "M12", 31, 20, 45, 0, 0, 0, 1],
'Africa/Monrovia': [1970, 1, "M01", 1, 1, 0, 30, 0, 0, 1],
'Europe/London': [1970, 1, "M01", 1, 2, 45, 0, 0, 0, 1],
'Europe/Berlin': [1970, 1, "M01", 1, 2, 45, 0, 0, 0, 1],
'Europe/Moscow': [1970, 1, "M01", 1, 4, 45, 0, 0, 0, 1],
'Asia/Kolkata': [1970, 1, "M01", 1, 7, 15, 0, 0, 0, 1],
'Asia/Tokyo': [1970, 1, "M01", 1, 10, 45, 0, 0, 0, 1],
});

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// Copyright (C) 2022 Igalia, S.L. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-temporal.timezone.prototype.getplaindatetimefor
description: Sample of results for IANA time zones around DST changes
includes: [temporalHelpers.js]
features: [Temporal]
---*/
function test(epochNs, id, expected) {
const instant = new Temporal.Instant(epochNs);
const tz = new Temporal.TimeZone(id);
const dt = tz.getPlainDateTimeFor(instant);
TemporalHelpers.assertPlainDateTime(dt, ...expected, `Local time of ${instant} in ${id}`);
}
// Just before DST forward shift
test(1553993999_999_999_999n, "Europe/London", [2019, 3, "M03", 31, 0, 59, 59, 999, 999, 999]);
// Just after DST forward shift
test(1553994000_000_000_000n, "Europe/London", [2019, 3, "M03", 31, 2, 0, 0, 0, 0, 0]);
// Just before DST backward shift
test(1550368799_999_999_999n, "America/Sao_Paulo", [2019, 2, "M02", 16, 23, 59, 59, 999, 999, 999]);
// Just after DST backward shift
test(1550368800_000_000_000n, "America/Sao_Paulo", [2019, 2, "M02", 16, 23, 0, 0, 0, 0, 0]);