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LibJS: Implement Temporal.ZonedDateTime.prototype.epochMilliseconds
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3 changed files with 36 additions and 0 deletions
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@ -43,6 +43,7 @@ void ZonedDateTimePrototype::initialize(GlobalObject& global_object)
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define_native_accessor(vm.names.microsecond, microsecond_getter, {}, Attribute::Configurable);
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define_native_accessor(vm.names.nanosecond, nanosecond_getter, {}, Attribute::Configurable);
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define_native_accessor(vm.names.epochSeconds, epoch_seconds_getter, {}, Attribute::Configurable);
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define_native_accessor(vm.names.epochMilliseconds, epoch_milliseconds_getter, {}, Attribute::Configurable);
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}
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static ZonedDateTime* typed_this(GlobalObject& global_object)
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@ -373,4 +374,23 @@ JS_DEFINE_NATIVE_FUNCTION(ZonedDateTimePrototype::epoch_seconds_getter)
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return Value((double)s.to_base(10).to_int<i64>().value());
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}
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// 6.3.16 get Temporal.ZonedDateTime.prototype.epochMilliseconds, https://tc39.es/proposal-temporal/#sec-get-temporal.zoneddatetime.prototype.epochmilliseconds
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JS_DEFINE_NATIVE_FUNCTION(ZonedDateTimePrototype::epoch_milliseconds_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 ns be zonedDateTime.[[Nanoseconds]].
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auto& ns = zoned_date_time->nanoseconds();
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// 4. Let ms be RoundTowardsZero(ℝ(ns) / 10^6).
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auto ms = ns.big_integer().divided_by(Crypto::UnsignedBigInteger { 1'000'000 }).quotient;
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// 5. Return 𝔽(ms).
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return Value((double)ms.to_base(10).to_int<i64>().value());
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}
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}
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@ -32,6 +32,7 @@ private:
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JS_DECLARE_NATIVE_FUNCTION(microsecond_getter);
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JS_DECLARE_NATIVE_FUNCTION(nanosecond_getter);
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JS_DECLARE_NATIVE_FUNCTION(epoch_seconds_getter);
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JS_DECLARE_NATIVE_FUNCTION(epoch_milliseconds_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.epochMilliseconds).toBe(1625614921000);
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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, "epochMilliseconds", "foo");
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}).toThrowWithMessage(TypeError, "Not a Temporal.ZonedDateTime");
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});
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});
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