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This requires a few adjustments of time zone names and offsets in some places. The only named time zone that is required to be supported by an implementation not supporting ECMA-402 is "UTC".
30 lines
1.3 KiB
JavaScript
30 lines
1.3 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.instant.from
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description: Conversion of ISO date-time strings to Temporal.Instant 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.Instant.from(str), "bare date-time string is not an instant");
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str = "1970-01-01T00:00[UTC]";
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assert.throws(RangeError, () => Temporal.Instant.from(str), "date-time + IANA annotation is not an instant");
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str = "1970-01-01T00:00Z";
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const result1 = Temporal.Instant.from(str);
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assert.sameValue(result1.epochNanoseconds, 0n, "date-time + Z preserves exact time");
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str = "1970-01-01T00:00+01:00";
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const result2 = Temporal.Instant.from(str);
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assert.sameValue(result2.epochNanoseconds, -3600_000_000_000n, "date-time + offset preserves exact time with offset");
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str = "1970-01-01T00:00Z[Etc/Ignored]";
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const result3 = Temporal.Instant.from(str);
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assert.sameValue(result3.epochNanoseconds, 0n, "date-time + Z + IANA annotation ignores the IANA annotation");
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str = "1970-01-01T00:00+01:00[Etc/Ignored]";
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const result4 = Temporal.Instant.from(str);
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assert.sameValue(result4.epochNanoseconds, -3600_000_000_000n, "date-time + offset + IANA annotation ignores the IANA annotation");
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