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LibJS: Implement Temporal.ZonedDateTime.prototype.toPlainDateTime()

This commit is contained in:
Linus Groh 2021-08-05 22:13:12 +01:00
parent 6ce631b023
commit 82ab5da4db
3 changed files with 50 additions and 0 deletions

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@ -64,6 +64,7 @@ void ZonedDateTimePrototype::initialize(GlobalObject& global_object)
define_native_function(vm.names.toInstant, to_instant, 0, attr);
define_native_function(vm.names.toPlainDate, to_plain_date, 0, attr);
define_native_function(vm.names.toPlainTime, to_plain_time, 0, attr);
define_native_function(vm.names.toPlainDateTime, to_plain_date_time, 0, attr);
}
static ZonedDateTime* typed_this(GlobalObject& global_object)
@ -772,4 +773,23 @@ JS_DEFINE_NATIVE_FUNCTION(ZonedDateTimePrototype::to_plain_time)
return create_temporal_time(global_object, temporal_date_time->iso_hour(), temporal_date_time->iso_minute(), temporal_date_time->iso_second(), temporal_date_time->iso_millisecond(), temporal_date_time->iso_microsecond(), temporal_date_time->iso_nanosecond());
}
// 6.3.49 Temporal.ZonedDateTime.prototype.toPlainDateTime ( ), https://tc39.es/proposal-temporal/#sec-temporal.zoneddatetime.prototype.toplaindatetime
JS_DEFINE_NATIVE_FUNCTION(ZonedDateTimePrototype::to_plain_date_time)
{
// 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. Return ? BuiltinTimeZoneGetPlainDateTimeFor(timeZone, instant, zonedDateTime.[[Calendar]]).
return builtin_time_zone_get_plain_date_time_for(global_object, &time_zone, *instant, zoned_date_time->calendar());
}
}

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@ -49,6 +49,7 @@ private:
JS_DECLARE_NATIVE_FUNCTION(to_instant);
JS_DECLARE_NATIVE_FUNCTION(to_plain_date);
JS_DECLARE_NATIVE_FUNCTION(to_plain_time);
JS_DECLARE_NATIVE_FUNCTION(to_plain_date_time);
};
}

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@ -0,0 +1,29 @@
describe("correct behavior", () => {
test("length is 0", () => {
expect(Temporal.ZonedDateTime.prototype.toPlainDateTime).toHaveLength(0);
});
test("basic functionality", () => {
const timeZone = new Temporal.TimeZone("UTC");
const zonedDateTime = new Temporal.ZonedDateTime(1625614921000000000n, timeZone);
const plainDateTime = zonedDateTime.toPlainDateTime();
expect(plainDateTime).toBeInstanceOf(Temporal.PlainDateTime);
expect(plainDateTime.year).toBe(2021);
expect(plainDateTime.month).toBe(7);
expect(plainDateTime.day).toBe(6);
expect(plainDateTime.hour).toBe(23);
expect(plainDateTime.minute).toBe(42);
expect(plainDateTime.second).toBe(1);
expect(plainDateTime.millisecond).toBe(0);
expect(plainDateTime.microsecond).toBe(0);
expect(plainDateTime.nanosecond).toBe(0);
});
});
test("errors", () => {
test("this value must be a Temporal.ZonedDateTime object", () => {
expect(() => {
Temporal.ZonedDateTime.prototype.toPlainDateTime.call("foo");
}).toThrowWithMessage(TypeError, "Not a Temporal.ZonedDateTime");
});
});