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LibJS: Implement Temporal.PlainYearMonth.prototype.daysInYear

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This commit is contained in:
Linus Groh 2021-08-07 23:51:57 +01:00
parent 5ec70792fd
commit 1f1d7144bf
3 changed files with 32 additions and 0 deletions
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17
Userland/Libraries/LibJS/Runtime/Temporal/PlainYearMonthPrototype.cpp
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@ -31,6 +31,7 @@ void PlainYearMonthPrototype::initialize(GlobalObject& global_object)
define_native_accessor(vm.names.year, year_getter, {}, Attribute::Configurable); define_native_accessor(vm.names.year, year_getter, {}, Attribute::Configurable);
define_native_accessor(vm.names.month, month_getter, {}, Attribute::Configurable); define_native_accessor(vm.names.month, month_getter, {}, Attribute::Configurable);
define_native_accessor(vm.names.monthCode, month_code_getter, {}, Attribute::Configurable); define_native_accessor(vm.names.monthCode, month_code_getter, {}, Attribute::Configurable);
define_native_accessor(vm.names.daysInYear, days_in_year_getter, {}, Attribute::Configurable);
} }
static PlainYearMonth* typed_this(GlobalObject& global_object) static PlainYearMonth* typed_this(GlobalObject& global_object)
@ -107,4 +108,20 @@ JS_DEFINE_NATIVE_FUNCTION(PlainYearMonthPrototype::month_code_getter)
return js_string(vm, calendar_month_code(global_object, calendar, *year_month)); return js_string(vm, calendar_month_code(global_object, calendar, *year_month));
} }
// 9.3.7 get Temporal.PlainYearMonth.prototype.daysInYear, https://tc39.es/proposal-temporal/#sec-get-temporal.plainyearmonth.prototype.daysinyear
JS_DEFINE_NATIVE_FUNCTION(PlainYearMonthPrototype::days_in_year_getter)
{
// 1. Let yearMonth be the this value.
// 2. Perform ? RequireInternalSlot(yearMonth, [[InitializedTemporalYearMonth]]).
auto* year_month = typed_this(global_object);
if (vm.exception())
return {};
// 3. Let calendar be yearMonth.[[Calendar]].
auto& calendar = year_month->calendar();
// 4. Return ? CalendarDaysInYear(calendar, yearMonth).
return Value(calendar_days_in_year(global_object, calendar, *year_month));
}
} }

1
Userland/Libraries/LibJS/Runtime/Temporal/PlainYearMonthPrototype.h
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@ -23,6 +23,7 @@ private:
JS_DECLARE_NATIVE_FUNCTION(year_getter); JS_DECLARE_NATIVE_FUNCTION(year_getter);
JS_DECLARE_NATIVE_FUNCTION(month_getter); JS_DECLARE_NATIVE_FUNCTION(month_getter);
JS_DECLARE_NATIVE_FUNCTION(month_code_getter); JS_DECLARE_NATIVE_FUNCTION(month_code_getter);
JS_DECLARE_NATIVE_FUNCTION(days_in_year_getter);
}; };
} }

14
Userland/Libraries/LibJS/Tests/builtins/Temporal/PlainYearMonth/PlainYearMonth.prototype.daysInYear.js Normal file
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@ -0,0 +1,14 @@
describe("correct behavior", () => {
test("basic functionality", () => {
const plainYearMonth = new Temporal.PlainYearMonth(2021, 7);
expect(plainYearMonth.daysInYear).toBe(365);
});
});
describe("errors", () => {
test("this value must be a Temporal.PlainYearMonth object", () => {
expect(() => {
Reflect.get(Temporal.PlainYearMonth.prototype, "daysInYear", "foo");
}).toThrowWithMessage(TypeError, "Not a Temporal.PlainYearMonth");
});
});