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LibJS: Implement Temporal.PlainDateTime.prototype.daysInMonth

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This commit is contained in:
Idan Horowitz 2021-07-30 00:21:10 +03:00 committed by Linus Groh
parent 01d33174c8
commit 2d86cbae45
Notes: sideshowbarker 2024-07-18 07:45:44 +09:00 
Author: https://github.com/IdanHo
Commit: https://github.com/SerenityOS/serenity/commit/2d86cbae45b
Pull-request: https://github.com/SerenityOS/serenity/pull/9097
Reviewed-by: https://github.com/linusg ✅
3 changed files with 32 additions and 0 deletions
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17
Userland/Libraries/LibJS/Runtime/Temporal/PlainDateTimePrototype.cpp
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@ -42,6 +42,7 @@ void PlainDateTimePrototype::initialize(GlobalObject& global_object)
define_native_accessor(vm.names.dayOfYear, day_of_year_getter, {}, Attribute::Configurable);
define_native_accessor(vm.names.weekOfYear, week_of_year_getter, {}, Attribute::Configurable);
define_native_accessor(vm.names.daysInWeek, days_in_week_getter, {}, Attribute::Configurable);
define_native_accessor(vm.names.daysInMonth, days_in_month_getter, {}, Attribute::Configurable);
u8 attr = Attribute::Writable | Attribute::Configurable;
define_native_function(vm.names.valueOf, value_of, 0, attr);
@ -281,6 +282,22 @@ JS_DEFINE_NATIVE_FUNCTION(PlainDateTimePrototype::days_in_week_getter)
return calendar_days_in_week(global_object, calendar, *date_time);
}
// 5.3.18 get Temporal.PlainDateTime.prototype.daysInMonth, https://tc39.es/proposal-temporal/#sec-get-temporal.plaindatetime.prototype.daysinmonth
JS_DEFINE_NATIVE_FUNCTION(PlainDateTimePrototype::days_in_month_getter)
{
// 1. Let dateTime be the this value.
// 2. Perform ? RequireInternalSlot(dateTime, [[InitializedTemporalDateTime]]).
auto* date_time = typed_this(global_object);
if (vm.exception())
return {};
// 3. Let calendar be dateTime.[[Calendar]].
auto& calendar = date_time->calendar();
// 4. Return ? CalendarDaysInMonth(calendar, dateTime).
return calendar_days_in_month(global_object, calendar, *date_time);
}
// 5.3.35 Temporal.PlainDateTime.prototype.valueOf ( ), https://tc39.es/proposal-temporal/#sec-temporal.plaindatetime.prototype.valueof
JS_DEFINE_NATIVE_FUNCTION(PlainDateTimePrototype::value_of)
{

1
Userland/Libraries/LibJS/Runtime/Temporal/PlainDateTimePrototype.h
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@ -34,6 +34,7 @@ private:
JS_DECLARE_NATIVE_FUNCTION(day_of_year_getter);
JS_DECLARE_NATIVE_FUNCTION(week_of_year_getter);
JS_DECLARE_NATIVE_FUNCTION(days_in_week_getter);
JS_DECLARE_NATIVE_FUNCTION(days_in_month_getter);
JS_DECLARE_NATIVE_FUNCTION(value_of);
JS_DECLARE_NATIVE_FUNCTION(to_plain_date);
JS_DECLARE_NATIVE_FUNCTION(get_iso_fields);

14
Userland/Libraries/LibJS/Tests/builtins/Temporal/PlainDateTime/PlainDateTime.prototype.daysInMonth.js Normal file
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@ -0,0 +1,14 @@
describe("correct behavior", () => {
test("basic functionality", () => {
const plainDateTime = new Temporal.PlainDateTime(2021, 7, 30);
expect(plainDateTime.daysInMonth).toBe(31);
});
});
test("errors", () => {
test("this value must be a Temporal.PlainDateTime object", () => {
expect(() => {
Reflect.get(Temporal.PlainDateTime.prototype, "daysInMonth", "foo");
}).toThrowWithMessage(TypeError, "Not a Temporal.PlainDateTime");
});
});