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LibJS: Implement Temporal.PlainYearMonth.prototype.daysInMonth

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This commit is contained in:
Linus Groh 2021-08-07 23:54:11 +01:00
parent 1f1d7144bf
commit 703eb1f7b4
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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@ -32,6 +32,7 @@ void PlainYearMonthPrototype::initialize(GlobalObject& global_object)
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); define_native_accessor(vm.names.daysInYear, days_in_year_getter, {}, Attribute::Configurable);
define_native_accessor(vm.names.daysInMonth, days_in_month_getter, {}, Attribute::Configurable);
} }
static PlainYearMonth* typed_this(GlobalObject& global_object) static PlainYearMonth* typed_this(GlobalObject& global_object)
@ -124,4 +125,20 @@ JS_DEFINE_NATIVE_FUNCTION(PlainYearMonthPrototype::days_in_year_getter)
return Value(calendar_days_in_year(global_object, calendar, *year_month)); return Value(calendar_days_in_year(global_object, calendar, *year_month));
} }
// 9.3.8 get Temporal.PlainYearMonth.prototype.daysInMonth, https://tc39.es/proposal-temporal/#sec-get-temporal.plainyearmonth.prototype.daysinmonth
JS_DEFINE_NATIVE_FUNCTION(PlainYearMonthPrototype::days_in_month_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 ? CalendarDaysInMonth(calendar, yearMonth).
return Value(calendar_days_in_month(global_object, calendar, *year_month));
}
} }

1
Userland/Libraries/LibJS/Runtime/Temporal/PlainYearMonthPrototype.h
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@ -24,6 +24,7 @@ private:
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); JS_DECLARE_NATIVE_FUNCTION(days_in_year_getter);
JS_DECLARE_NATIVE_FUNCTION(days_in_month_getter);
}; };
} }

14
Userland/Libraries/LibJS/Tests/builtins/Temporal/PlainYearMonth/PlainYearMonth.prototype.daysInMonth.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.daysInMonth).toBe(31);
});
});
describe("errors", () => {
test("this value must be a Temporal.PlainYearMonth object", () => {
expect(() => {
Reflect.get(Temporal.PlainYearMonth.prototype, "daysInMonth", "foo");
}).toThrowWithMessage(TypeError, "Not a Temporal.PlainYearMonth");
});
});