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LibJS: Implement Temporal.PlainMonthDay.prototype.getISOFields()
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@ -33,6 +33,7 @@ void PlainMonthDayPrototype::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.getISOFields, get_iso_fields, 0, attr);
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}
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static PlainMonthDay* typed_this(GlobalObject& global_object)
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@ -101,4 +102,32 @@ JS_DEFINE_NATIVE_FUNCTION(PlainMonthDayPrototype::value_of)
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return {};
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}
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// 10.3.13 Temporal.PlainMonthDay.prototype.getISOFields ( ), https://tc39.es/proposal-temporal/#sec-temporal.plainmonthday.prototype.getisofields
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JS_DEFINE_NATIVE_FUNCTION(PlainMonthDayPrototype::get_iso_fields)
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{
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// 1. Let monthDay be the this value.
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// 2. Perform ? RequireInternalSlot(monthDay, [[InitializedTemporalMonthDay]]).
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auto* month_day = typed_this(global_object);
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if (vm.exception())
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return {};
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// 3. Let fields be ! OrdinaryObjectCreate(%Object.prototype%).
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auto* fields = Object::create(global_object, global_object.object_prototype());
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// 4. Perform ! CreateDataPropertyOrThrow(fields, "calendar", monthDay.[[Calendar]]).
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fields->create_data_property_or_throw(vm.names.calendar, Value(&month_day->calendar()));
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// 5. Perform ! CreateDataPropertyOrThrow(fields, "isoDay", 𝔽(monthDay.[[ISODay]])).
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fields->create_data_property_or_throw(vm.names.isoDay, Value(month_day->iso_day()));
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// 6. Perform ! CreateDataPropertyOrThrow(fields, "isoMonth", 𝔽(monthDay.[[ISOMonth]])).
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fields->create_data_property_or_throw(vm.names.isoMonth, Value(month_day->iso_month()));
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// 7. Perform ! CreateDataPropertyOrThrow(fields, "isoYear", 𝔽(monthDay.[[ISOYear]])).
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fields->create_data_property_or_throw(vm.names.isoYear, Value(month_day->iso_year()));
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// 8. Return fields.
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return fields;
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}
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}
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@ -23,6 +23,7 @@ private:
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JS_DECLARE_NATIVE_FUNCTION(month_code_getter);
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JS_DECLARE_NATIVE_FUNCTION(day_getter);
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JS_DECLARE_NATIVE_FUNCTION(value_of);
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JS_DECLARE_NATIVE_FUNCTION(get_iso_fields);
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};
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}
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@ -0,0 +1,27 @@
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describe("normal behavior", () => {
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test("length is 0", () => {
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expect(Temporal.PlainMonthDay.prototype.getISOFields).toHaveLength(0);
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});
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test("basic functionality", () => {
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const calendar = new Temporal.Calendar("iso8601");
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const plainMonthDay = new Temporal.PlainMonthDay(7, 6, calendar, 2021);
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const fields = plainMonthDay.getISOFields();
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expect(fields).toEqual({ calendar, isoDay: 6, isoMonth: 7, isoYear: 2021 });
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// Test field order
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expect(Object.getOwnPropertyNames(fields)).toEqual([
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"calendar",
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"isoDay",
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"isoMonth",
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"isoYear",
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]);
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});
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});
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describe("errors", () => {
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test("this value must be a Temporal.PlainMonthDay object", () => {
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expect(() => {
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Temporal.PlainMonthDay.prototype.getISOFields.call("foo");
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}).toThrowWithMessage(TypeError, "Not a Temporal.PlainMonthDay");
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});
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});
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