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LibJS: Implement Temporal.PlainYearMonth.prototype.inLeapYear
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3 changed files with 32 additions and 0 deletions
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@ -34,6 +34,7 @@ void PlainYearMonthPrototype::initialize(GlobalObject& global_object)
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define_native_accessor(vm.names.daysInYear, days_in_year_getter, {}, Attribute::Configurable);
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define_native_accessor(vm.names.daysInMonth, days_in_month_getter, {}, Attribute::Configurable);
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define_native_accessor(vm.names.monthsInYear, months_in_year_getter, {}, Attribute::Configurable);
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define_native_accessor(vm.names.inLeapYear, in_leap_year_getter, {}, Attribute::Configurable);
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}
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static PlainYearMonth* typed_this(GlobalObject& global_object)
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@ -158,4 +159,20 @@ JS_DEFINE_NATIVE_FUNCTION(PlainYearMonthPrototype::months_in_year_getter)
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return Value(calendar_months_in_year(global_object, calendar, *year_month));
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}
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// 9.3.10 get Temporal.PlainYearMonth.prototype.inLeapYear, https://tc39.es/proposal-temporal/#sec-get-temporal.plainyearmonth.prototype.inleapyear
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JS_DEFINE_NATIVE_FUNCTION(PlainYearMonthPrototype::in_leap_year_getter)
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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 calendar be yearMonth.[[Calendar]].
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auto& calendar = year_month->calendar();
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// 4. Return ? CalendarInLeapYear(calendar, yearMonth).
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return Value(calendar_in_leap_year(global_object, calendar, *year_month));
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}
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}
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@ -26,6 +26,7 @@ private:
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JS_DECLARE_NATIVE_FUNCTION(days_in_year_getter);
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JS_DECLARE_NATIVE_FUNCTION(days_in_month_getter);
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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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};
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}
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@ -0,0 +1,14 @@
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describe("correct behavior", () => {
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test("basic functionality", () => {
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const plainYearMonth = new Temporal.PlainYearMonth(2021, 7);
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expect(plainYearMonth.inLeapYear).toBe(false);
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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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Reflect.get(Temporal.PlainYearMonth.prototype, "inLeapYear", "foo");
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}).toThrowWithMessage(TypeError, "Not a Temporal.PlainYearMonth");
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});
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});
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