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LibJS: Implement Temporal.ZonedDateTime.prototype.toPlainDate()
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parent
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sideshowbarker
2024-07-18 07:26:29 +09:00
Author: https://github.com/linusg Commit: https://github.com/SerenityOS/serenity/commit/b4ea4e86a74 Pull-request: https://github.com/SerenityOS/serenity/pull/9228 Reviewed-by: https://github.com/IdanHo ✅
@ -8,6 +8,7 @@
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/Temporal/Calendar.h>
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#include <LibJS/Runtime/Temporal/Instant.h>
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#include <LibJS/Runtime/Temporal/PlainDate.h>
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#include <LibJS/Runtime/Temporal/PlainDateTime.h>
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#include <LibJS/Runtime/Temporal/TimeZone.h>
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#include <LibJS/Runtime/Temporal/ZonedDateTime.h>
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@ -60,6 +61,7 @@ void ZonedDateTimePrototype::initialize(GlobalObject& global_object)
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u8 attr = Attribute::Writable | Attribute::Configurable;
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define_native_function(vm.names.valueOf, value_of, 0, attr);
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define_native_function(vm.names.toInstant, to_instant, 0, attr);
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define_native_function(vm.names.toPlainDate, to_plain_date, 0, attr);
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}
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static ZonedDateTime* typed_this(GlobalObject& global_object)
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@ -716,4 +718,31 @@ JS_DEFINE_NATIVE_FUNCTION(ZonedDateTimePrototype::to_instant)
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return create_temporal_instant(global_object, zoned_date_time->nanoseconds());
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}
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// 6.3.47 Temporal.ZonedDateTime.prototype.toPlainDate ( ), https://tc39.es/proposal-temporal/#sec-temporal.zoneddatetime.prototype.toplaindate
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JS_DEFINE_NATIVE_FUNCTION(ZonedDateTimePrototype::to_plain_date)
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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 ? CreateTemporalDate(temporalDateTime.[[ISOYear]], temporalDateTime.[[ISOMonth]], temporalDateTime.[[ISODay]], calendar).
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return create_temporal_date(global_object, temporal_date_time->iso_year(), temporal_date_time->iso_month(), temporal_date_time->iso_day(), calendar);
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}
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}
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@ -47,6 +47,7 @@ private:
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JS_DECLARE_NATIVE_FUNCTION(offset_getter);
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JS_DECLARE_NATIVE_FUNCTION(value_of);
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JS_DECLARE_NATIVE_FUNCTION(to_instant);
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JS_DECLARE_NATIVE_FUNCTION(to_plain_date);
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};
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}
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@ -0,0 +1,23 @@
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describe("correct behavior", () => {
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test("length is 0", () => {
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expect(Temporal.ZonedDateTime.prototype.toPlainDate).toHaveLength(0);
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});
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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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const plainDate = zonedDateTime.toPlainDate();
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expect(plainDate).toBeInstanceOf(Temporal.PlainDate);
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expect(plainDate.year).toBe(2021);
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expect(plainDate.month).toBe(7);
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expect(plainDate.day).toBe(6);
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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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Temporal.ZonedDateTime.prototype.toPlainDate.call("foo");
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}).toThrowWithMessage(TypeError, "Not a Temporal.ZonedDateTime");
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});
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});
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