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LibJS: Implement Temporal.PlainYearMonth.prototype.getISOFields()
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3 changed files with 57 additions and 0 deletions
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@ -38,6 +38,7 @@ void PlainYearMonthPrototype::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 PlainYearMonth* typed_this(GlobalObject& global_object)
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@ -186,4 +187,32 @@ JS_DEFINE_NATIVE_FUNCTION(PlainYearMonthPrototype::value_of)
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return {};
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}
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// 9.3.22 Temporal.PlainYearMonth.prototype.getISOFields ( ), https://tc39.es/proposal-temporal/#sec-temporal.plainyearmonth.prototype.getisofields
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JS_DEFINE_NATIVE_FUNCTION(PlainYearMonthPrototype::get_iso_fields)
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{
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// 1. Let yearMonth be the this value.
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// 2. Perform ? RequireInternalSlot(yearMonth, [[InitializedTemporalYearMonth]]).
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auto* year_month = 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", yearMonth.[[Calendar]]).
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fields->create_data_property_or_throw(vm.names.calendar, Value(&year_month->calendar()));
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// 5. Perform ! CreateDataPropertyOrThrow(fields, "isoDay", 𝔽(yearMonth.[[ISODay]])).
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fields->create_data_property_or_throw(vm.names.isoDay, Value(year_month->iso_day()));
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// 6. Perform ! CreateDataPropertyOrThrow(fields, "isoMonth", 𝔽(yearMonth.[[ISOMonth]])).
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fields->create_data_property_or_throw(vm.names.isoMonth, Value(year_month->iso_month()));
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// 7. Perform ! CreateDataPropertyOrThrow(fields, "isoYear", 𝔽(yearMonth.[[ISOYear]])).
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fields->create_data_property_or_throw(vm.names.isoYear, Value(year_month->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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@ -28,6 +28,7 @@ private:
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JS_DECLARE_NATIVE_FUNCTION(months_in_year_getter);
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JS_DECLARE_NATIVE_FUNCTION(in_leap_year_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.PlainYearMonth.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 plainYearMonth = new Temporal.PlainYearMonth(2021, 7, calendar, 6);
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const fields = plainYearMonth.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.PlainYearMonth object", () => {
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expect(() => {
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Temporal.PlainYearMonth.prototype.getISOFields.call("foo");
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}).toThrowWithMessage(TypeError, "Not a Temporal.PlainYearMonth");
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});
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});
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