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LibJS: Implement Temporal.PlainDateTime.prototype.toPlainYearMonth()

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Linus Groh 2021-08-23 23:23:53 +01:00 • committed by Andreas Kling
parent ed5ae7b093
commit 5573efa3bd
3 changed files with 42 additions and 0 deletions
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28
Userland/Libraries/LibJS/Runtime/Temporal/PlainDateTimePrototype.cpp
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@ -6,6 +6,7 @@
#include <AK/TypeCasts.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/Temporal/AbstractOperations.h>
#include <LibJS/Runtime/Temporal/Calendar.h>
#include <LibJS/Runtime/Temporal/PlainDate.h>
#include <LibJS/Runtime/Temporal/PlainDateTime.h>
@ -54,6 +55,7 @@ void PlainDateTimePrototype::initialize(GlobalObject& global_object)
define_native_function(vm.names.withCalendar, with_calendar, 1, attr);
define_native_function(vm.names.valueOf, value_of, 0, attr);
define_native_function(vm.names.toPlainDate, to_plain_date, 0, attr);
define_native_function(vm.names.toPlainYearMonth, to_plain_year_month, 0, attr);
define_native_function(vm.names.toPlainTime, to_plain_time, 0, attr);
define_native_function(vm.names.getISOFields, get_iso_fields, 0, attr);
}
@ -416,6 +418,32 @@ JS_DEFINE_NATIVE_FUNCTION(PlainDateTimePrototype::to_plain_date)
return create_temporal_date(global_object, date_time->iso_year(), date_time->iso_month(), date_time->iso_day(), date_time->calendar());
}
// 5.3.38 Temporal.PlainDateTime.prototype.toPlainYearMonth ( ), https://tc39.es/proposal-temporal/#sec-temporal.plaindatetime.prototype.toplainyearmonth
JS_DEFINE_NATIVE_FUNCTION(PlainDateTimePrototype::to_plain_year_month)
{
// 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. Let fieldNames be ? CalendarFields(calendar, « "monthCode", "year" »).
auto field_names = calendar_fields(global_object, calendar, { "monthCode"sv, "year"sv });
if (vm.exception())
return {};
// 5. Let fields be ? PrepareTemporalFields(dateTime, fieldNames, «»).
auto* fields = prepare_temporal_fields(global_object, *date_time, field_names, {});
if (vm.exception())
return {};
// 6. Return ? YearMonthFromFields(calendar, fields).
return year_month_from_fields(global_object, calendar, *fields);
}
// 5.3.40 Temporal.PlainDateTime.prototype.toPlainTime ( ), https://tc39.es/proposal-temporal/#sec-temporal.plaindatetime.prototype.toplaintime
JS_DEFINE_NATIVE_FUNCTION(PlainDateTimePrototype::to_plain_time)
{

1
Userland/Libraries/LibJS/Runtime/Temporal/PlainDateTimePrototype.h
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@ -42,6 +42,7 @@ private:
JS_DECLARE_NATIVE_FUNCTION(with_calendar);
JS_DECLARE_NATIVE_FUNCTION(value_of);
JS_DECLARE_NATIVE_FUNCTION(to_plain_date);
JS_DECLARE_NATIVE_FUNCTION(to_plain_year_month);
JS_DECLARE_NATIVE_FUNCTION(to_plain_time);
JS_DECLARE_NATIVE_FUNCTION(get_iso_fields);
};

13
Userland/Libraries/LibJS/Tests/builtins/Temporal/PlainDateTime/PlainDateTime.prototype.toPlainYearMonth.js Normal file
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@ -0,0 +1,13 @@
describe("correct behavior", () => {
test("length is 0", () => {
expect(Temporal.PlainDateTime.prototype.toPlainYearMonth).toHaveLength(0);
});
test("basic functionality", () => {
const plainDateTime = new Temporal.PlainDateTime(2021, 7, 6, 18, 14, 47);
const plainYearMonth = plainDateTime.toPlainYearMonth();
expect(plainYearMonth.calendar).toBe(plainDateTime.calendar);
expect(plainYearMonth.year).toBe(2021);
expect(plainYearMonth.month).toBe(7);
});
});