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LibJS: Implement Temporal.ZonedDateTime.prototype.dayOfWeek
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sideshowbarker
2024-07-18 07:27:27 +09:00
Author: https://github.com/linusg Commit: https://github.com/SerenityOS/serenity/commit/39e67a58231 Pull-request: https://github.com/SerenityOS/serenity/pull/9213 Reviewed-by: https://github.com/IdanHo ✅
@ -46,6 +46,7 @@ void ZonedDateTimePrototype::initialize(GlobalObject& global_object)
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define_native_accessor(vm.names.epochMilliseconds, epoch_milliseconds_getter, {}, Attribute::Configurable);
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define_native_accessor(vm.names.epochMicroseconds, epoch_microseconds_getter, {}, Attribute::Configurable);
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define_native_accessor(vm.names.epochNanoseconds, epoch_nanoseconds_getter, {}, Attribute::Configurable);
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define_native_accessor(vm.names.dayOfWeek, day_of_week_getter, {}, Attribute::Configurable);
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}
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static ZonedDateTime* typed_this(GlobalObject& global_object)
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@ -427,4 +428,31 @@ JS_DEFINE_NATIVE_FUNCTION(ZonedDateTimePrototype::epoch_nanoseconds_getter)
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return &zoned_date_time->nanoseconds();
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}
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// 6.3.19 get Temporal.ZonedDateTime.prototype.dayOfWeek, https://tc39.es/proposal-temporal/#sec-get-temporal.zoneddatetime.prototype.dayofweek
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JS_DEFINE_NATIVE_FUNCTION(ZonedDateTimePrototype::day_of_week_getter)
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{
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// 1. Let zonedDateTime be the this value.
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// 2. Perform ? RequireInternalSlot(zonedDateTime, [[InitializedTemporalZonedDateTime]]).
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auto* zoned_date_time = typed_this(global_object);
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if (vm.exception())
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return {};
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// 3. Let timeZone be zonedDateTime.[[TimeZone]].
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auto& time_zone = zoned_date_time->time_zone();
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// 4. Let instant be ! CreateTemporalInstant(zonedDateTime.[[Nanoseconds]]).
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auto* instant = create_temporal_instant(global_object, zoned_date_time->nanoseconds());
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// 5. Let calendar be zonedDateTime.[[Calendar]].
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auto& calendar = zoned_date_time->calendar();
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// 6. Let temporalDateTime be ? BuiltinTimeZoneGetPlainDateTimeFor(timeZone, instant, calendar).
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auto* temporal_date_time = builtin_time_zone_get_plain_date_time_for(global_object, &time_zone, *instant, calendar);
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if (vm.exception())
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return {};
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// 7. Return ? CalendarDayOfWeek(calendar, temporalDateTime).
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return calendar_day_of_week(global_object, calendar, *temporal_date_time);
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}
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}
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@ -35,6 +35,7 @@ private:
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JS_DECLARE_NATIVE_FUNCTION(epoch_milliseconds_getter);
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JS_DECLARE_NATIVE_FUNCTION(epoch_microseconds_getter);
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JS_DECLARE_NATIVE_FUNCTION(epoch_nanoseconds_getter);
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JS_DECLARE_NATIVE_FUNCTION(day_of_week_getter);
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};
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}
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@ -0,0 +1,15 @@
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describe("correct behavior", () => {
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test("basic functionality", () => {
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const timeZone = new Temporal.TimeZone("UTC");
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const zonedDateTime = new Temporal.ZonedDateTime(1625614921000000000n, timeZone);
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expect(zonedDateTime.dayOfWeek).toBe(2);
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});
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});
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test("errors", () => {
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test("this value must be a Temporal.ZonedDateTime object", () => {
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expect(() => {
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Reflect.get(Temporal.ZonedDateTime.prototype, "dayOfWeek", "foo");
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}).toThrowWithMessage(TypeError, "Not a Temporal.ZonedDateTime");
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});
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});
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