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LibJS: Implement Temporal.Instant.prototype.toZonedDateTimeISO()
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4 changed files with 77 additions and 0 deletions
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@ -436,6 +436,7 @@ namespace JS {
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P(toUpperCase) \
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P(toUTCString) \
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P(toZonedDateTime) \
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P(toZonedDateTimeISO) \
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P(trace) \
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P(trim) \
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P(trimEnd) \
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@ -49,6 +49,7 @@ void InstantPrototype::initialize(GlobalObject& global_object)
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define_native_function(vm.names.toJSON, to_json, 0, attr);
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define_native_function(vm.names.valueOf, value_of, 0, attr);
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define_native_function(vm.names.toZonedDateTime, to_zoned_date_time, 1, attr);
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define_native_function(vm.names.toZonedDateTimeISO, to_zoned_date_time_iso, 1, attr);
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}
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static Instant* typed_this(GlobalObject& global_object)
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@ -568,4 +569,41 @@ JS_DEFINE_NATIVE_FUNCTION(InstantPrototype::to_zoned_date_time)
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return create_temporal_zoned_date_time(global_object, instant->nanoseconds(), *time_zone, *calendar);
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}
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// 8.3.18 Temporal.Instant.prototype.toZonedDateTimeISO ( item ), https://tc39.es/proposal-temporal/#sec-temporal.instant.prototype.tozoneddatetimeiso
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JS_DEFINE_NATIVE_FUNCTION(InstantPrototype::to_zoned_date_time_iso)
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{
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auto item = vm.argument(0);
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// 1. Let instant be the this value.
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// 2. Perform ? RequireInternalSlot(instant, [[InitializedTemporalInstant]]).
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auto* instant = typed_this(global_object);
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if (vm.exception())
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return {};
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// 3. If Type(item) is Object, then
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if (item.is_object()) {
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// a. Let timeZoneProperty be ? Get(item, "timeZone").
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auto time_zone_property = item.as_object().get(vm.names.timeZone);
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if (vm.exception())
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return {};
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// b. If timeZoneProperty is not undefined, then
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if (!time_zone_property.is_undefined()) {
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// i. Set item to timeZoneProperty.
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item = time_zone_property;
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}
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}
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// 4. Let timeZone be ? ToTemporalTimeZone(item).
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auto* time_zone = to_temporal_time_zone(global_object, item);
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if (vm.exception())
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return {};
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// 5. Let calendar be ! GetISO8601Calendar().
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auto* calendar = get_iso8601_calendar(global_object);
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// 6. Return ? CreateTemporalZonedDateTime(instant.[[Nanoseconds]], timeZone, calendar).
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return create_temporal_zoned_date_time(global_object, instant->nanoseconds(), *time_zone, *calendar);
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}
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}
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@ -34,6 +34,7 @@ private:
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JS_DECLARE_NATIVE_FUNCTION(to_json);
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JS_DECLARE_NATIVE_FUNCTION(value_of);
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JS_DECLARE_NATIVE_FUNCTION(to_zoned_date_time);
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JS_DECLARE_NATIVE_FUNCTION(to_zoned_date_time_iso);
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};
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}
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@ -0,0 +1,37 @@
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describe("correct behavior", () => {
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test("length is 1", () => {
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expect(Temporal.Instant.prototype.toZonedDateTimeISO).toHaveLength(1);
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});
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// TODO: Un-skip when ParseTemporalTimeZoneString is fully implemented
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test.skip("basic functionality", () => {
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const instant = new Temporal.Instant(1625614921123456789n);
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const zonedDateTime = instant.toZonedDateTimeISO("UTC");
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expect(zonedDateTime.year).toBe(2021);
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expect(zonedDateTime.month).toBe(7);
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expect(zonedDateTime.day).toBe(6);
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expect(zonedDateTime.hour).toBe(23);
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expect(zonedDateTime.minute).toBe(42);
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expect(zonedDateTime.second).toBe(1);
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expect(zonedDateTime.millisecond).toBe(123);
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expect(zonedDateTime.microsecond).toBe(456);
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expect(zonedDateTime.nanosecond).toBe(789);
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expect(zonedDateTime.calendar.id).toBe("iso8601");
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expect(zonedDateTime.timeZone.id).toBe("UTC");
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});
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test("custom time zone object", () => {
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const instant = new Temporal.Instant(1625614921123456789n);
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const timeZone = new Temporal.TimeZone("UTC");
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const zonedDateTime = instant.toZonedDateTimeISO({ timeZone });
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expect(zonedDateTime.timeZone).toBe(timeZone);
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});
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});
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describe("errors", () => {
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test("this value must be a Temporal.Instant object", () => {
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expect(() => {
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Temporal.Instant.prototype.toZonedDateTimeISO.call("foo");
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}).toThrowWithMessage(TypeError, "Not a Temporal.Instant");
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});
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});
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