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This is the replacement of the old API with the new API, .timeZoneId and .getTimeZone(). Semantics will be corrected in the following commit. Normative PR: https://github.com/tc39/proposal-temporal/pull/2482
38 lines
2.3 KiB
JavaScript
38 lines
2.3 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.zoneddatetime.from
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description: Conversion of ISO date-time strings to Temporal.ZonedDateTime instances
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features: [Temporal]
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---*/
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let str = "1970-01-01T00:00";
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assert.throws(RangeError, () => Temporal.ZonedDateTime.from(str), "bare date-time string is not a ZonedDateTime");
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str = "1970-01-01T00:00Z";
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assert.throws(RangeError, () => Temporal.ZonedDateTime.from(str), "date-time + Z is not a ZonedDateTime");
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str = "1970-01-01T00:00+01:00";
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assert.throws(RangeError, () => Temporal.ZonedDateTime.from(str), "date-time + offset is not a ZonedDateTime");
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str = "1970-01-01T00:00[+01:00]";
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const result1 = Temporal.ZonedDateTime.from(str);
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assert.sameValue(result1.epochNanoseconds, -3600_000_000_000n, "date-time + IANA annotation preserves wall time in the time zone");
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assert.sameValue(result1.timeZoneId, "+01:00", "IANA annotation is not ignored");
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str = "1970-01-01T00:00Z[+01:00]";
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const result2 = Temporal.ZonedDateTime.from(str);
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assert.sameValue(result2.epochNanoseconds, 0n, "date-time + Z + IANA annotation preserves exact time in the time zone");
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assert.sameValue(result2.timeZoneId, "+01:00", "IANA annotation is not ignored");
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str = "1970-01-01T00:00+01:00[+01:00]";
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const result3 = Temporal.ZonedDateTime.from(str);
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assert.sameValue(result3.epochNanoseconds, -3600_000_000_000n, "date-time + offset + IANA annotation ensures both exact and wall time match");
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assert.sameValue(result3.timeZoneId, "+01:00", "IANA annotation is not ignored");
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str = "1970-01-01T00:00-04:15[+01:00]";
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assert.throws(RangeError, () => Temporal.ZonedDateTime.from(str), "date-time + offset + IANA annotation throws if wall time and exact time mismatch");
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assert.throws(RangeError, () => Temporal.ZonedDateTime.from(str, { offset: "reject" }), "date-time + offset + IANA annotation throws if wall time and exact time mismatch (explicit reject option)");
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const result4 = Temporal.ZonedDateTime.from(str, { offset: "ignore" });
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assert.sameValue(result4.epochNanoseconds, -3600_000_000_000n, "date-time + wrong offset + IANA annotation preserves wall time in the time zone (offset: ignore option)");
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assert.sameValue(result4.timeZoneId, "+01:00", "IANA annotation is not ignored");
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