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LibJS: Implement Temporal.ZonedDateTime.prototype.nanosecond

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Linus Groh 2021-08-04 23:00:20 +01:00 committed by Andreas Kling
parent 4b22d0f2ce
commit a1082412ef
Notes: sideshowbarker 2024-07-18 07:27:45 +09:00 
Author: https://github.com/linusg
Commit: https://github.com/SerenityOS/serenity/commit/a1082412ef1
Pull-request: https://github.com/SerenityOS/serenity/pull/9213
Reviewed-by: https://github.com/IdanHo ✅
3 changed files with 44 additions and 0 deletions
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28
Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimePrototype.cpp
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@ -41,6 +41,7 @@ void ZonedDateTimePrototype::initialize(GlobalObject& global_object)
define_native_accessor(vm.names.second, second_getter, {}, Attribute::Configurable);
define_native_accessor(vm.names.millisecond, millisecond_getter, {}, Attribute::Configurable);
define_native_accessor(vm.names.microsecond, microsecond_getter, {}, Attribute::Configurable);
define_native_accessor(vm.names.nanosecond, nanosecond_getter, {}, Attribute::Configurable);
}
static ZonedDateTime* typed_this(GlobalObject& global_object)
@ -325,4 +326,31 @@ JS_DEFINE_NATIVE_FUNCTION(ZonedDateTimePrototype::microsecond_getter)
return Value(temporal_date_time->iso_microsecond());
}
// 6.3.14 get Temporal.ZonedDateTime.prototype.nanosecond, https://tc39.es/proposal-temporal/#sec-get-temporal.zoneddatetime.prototype.nanosecond
JS_DEFINE_NATIVE_FUNCTION(ZonedDateTimePrototype::nanosecond_getter)
{
// 1. Let zonedDateTime be the this value.
// 2. Perform ? RequireInternalSlot(zonedDateTime, [[InitializedTemporalZonedDateTime]]).
auto* zoned_date_time = typed_this(global_object);
if (vm.exception())
return {};
// 3. Let timeZone be zonedDateTime.[[TimeZone]].
auto& time_zone = zoned_date_time->time_zone();
// 4. Let instant be ! CreateTemporalInstant(zonedDateTime.[[Nanoseconds]]).
auto* instant = create_temporal_instant(global_object, zoned_date_time->nanoseconds());
// 5. Let calendar be zonedDateTime.[[Calendar]].
auto& calendar = zoned_date_time->calendar();
// 6. Let temporalDateTime be ? BuiltinTimeZoneGetPlainDateTimeFor(timeZone, instant, calendar).
auto* temporal_date_time = builtin_time_zone_get_plain_date_time_for(global_object, &time_zone, *instant, calendar);
if (vm.exception())
return {};
// 7. Return 𝔽(temporalDateTime.[[ISONanosecond]]).
return Value(temporal_date_time->iso_nanosecond());
}
}

1
Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimePrototype.h
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@ -30,6 +30,7 @@ private:
JS_DECLARE_NATIVE_FUNCTION(second_getter);
JS_DECLARE_NATIVE_FUNCTION(millisecond_getter);
JS_DECLARE_NATIVE_FUNCTION(microsecond_getter);
JS_DECLARE_NATIVE_FUNCTION(nanosecond_getter);
};
}

15
Userland/Libraries/LibJS/Tests/builtins/Temporal/ZonedDateTime/ZonedDateTime.prototype.nanosecond.js Normal file
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@ -0,0 +1,15 @@
describe("correct behavior", () => {
test("basic functionality", () => {
const timeZone = new Temporal.TimeZone("UTC");
const zonedDateTime = new Temporal.ZonedDateTime(123n, timeZone);
expect(zonedDateTime.nanosecond).toBe(123);
});
});
test("errors", () => {
test("this value must be a Temporal.ZonedDateTime object", () => {
expect(() => {
Reflect.get(Temporal.ZonedDateTime.prototype, "nanosecond", "foo");
}).toThrowWithMessage(TypeError, "Not a Temporal.ZonedDateTime");
});
});