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LibJS: Implement Temporal.ZonedDateTime.prototype.toInstant()
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4 changed files with 37 additions and 0 deletions
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@ -376,6 +376,7 @@ namespace JS {
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P(toDateString) \
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P(toFixed) \
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P(toGMTString) \
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P(toInstant) \
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P(toISOString) \
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P(toJSON) \
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P(toLocaleDateString) \
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@ -59,6 +59,7 @@ 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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}
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static ZonedDateTime* typed_this(GlobalObject& global_object)
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@ -702,4 +703,17 @@ JS_DEFINE_NATIVE_FUNCTION(ZonedDateTimePrototype::value_of)
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return {};
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}
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// 6.3.46 Temporal.ZonedDateTime.prototype.toInstant ( ), https://tc39.es/proposal-temporal/#sec-temporal.zoneddatetime.prototype.toinstant
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JS_DEFINE_NATIVE_FUNCTION(ZonedDateTimePrototype::to_instant)
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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. Return ! CreateTemporalInstant(zonedDateTime.[[Nanoseconds]]).
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return create_temporal_instant(global_object, zoned_date_time->nanoseconds());
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}
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}
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@ -46,6 +46,7 @@ private:
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JS_DECLARE_NATIVE_FUNCTION(offset_nanoseconds_getter);
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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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};
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}
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@ -0,0 +1,21 @@
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describe("correct behavior", () => {
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test("length is 0", () => {
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expect(Temporal.ZonedDateTime.prototype.toInstant).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 instant = zonedDateTime.toInstant();
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expect(instant).toBeInstanceOf(Temporal.Instant);
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expect(instant.epochNanoseconds).toBe(1625614921000000000n);
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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.toInstant.call("foo");
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}).toThrowWithMessage(TypeError, "Not a Temporal.ZonedDateTime");
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});
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});
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