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LibJS: Implement Temporal.PlainYearMonth.prototype.toString()
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@ -7,6 +7,7 @@
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#include <LibJS/Runtime/AbstractOperations.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/Temporal/AbstractOperations.h>
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#include <LibJS/Runtime/Temporal/Calendar.h>
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#include <LibJS/Runtime/Temporal/PlainDate.h>
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#include <LibJS/Runtime/Temporal/PlainYearMonth.h>
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#include <LibJS/Runtime/Temporal/PlainYearMonthConstructor.h>
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@ -186,4 +187,37 @@ PlainYearMonth* create_temporal_year_month(GlobalObject& global_object, i32 iso_
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return object;
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}
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// 9.5.8 TemporalYearMonthToString ( yearMonth, showCalendar ), https://tc39.es/proposal-temporal/#sec-temporal-temporalyearmonthtostring
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Optional<String> temporal_year_month_to_string(GlobalObject& global_object, PlainYearMonth& year_month, StringView show_calendar)
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{
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auto& vm = global_object.vm();
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// 1. Assert: Type(yearMonth) is Object.
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// 2. Assert: yearMonth has an [[InitializedTemporalYearMonth]] internal slot.
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// 3. Let year be ! PadISOYear(yearMonth.[[ISOYear]]).
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// 4. Let month be yearMonth.[[ISOMonth]] formatted as a two-digit decimal number, padded to the left with a zero if necessary.
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// 5. Let result be the string-concatenation of year, the code unit 0x002D (HYPHEN-MINUS), and month.
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auto result = String::formatted("{}-{:02}", pad_iso_year(year_month.iso_year()), year_month.iso_month());
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// 6. Let calendarID be ? ToString(yearMonth.[[Calendar]]).
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auto calendar_id = Value(&year_month.calendar()).to_string(global_object);
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if (vm.exception())
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return {};
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// 7. If calendarID is not "iso8601", then
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if (calendar_id != "iso8601") {
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// a. Let day be yearMonth.[[ISODay]] formatted as a two-digit decimal number, padded to the left with a zero if necessary.
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// b. Set result to the string-concatenation of result, the code unit 0x002D (HYPHEN-MINUS), and day.
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result = String::formatted("{}-{:02}", result, year_month.iso_day());
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}
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// 8. Let calendarString be ! FormatCalendarAnnotation(calendarID, showCalendar).
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auto calendar_string = format_calendar_annotation(calendar_id, show_calendar);
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// 9. Set result to the string-concatenation of result and calendarString.
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// 10. Return result.
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return String::formatted("{}{}", result, calendar_string);
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}
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}
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@ -45,5 +45,6 @@ bool iso_year_month_within_limits(i32 year, u8 month);
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ISOYearMonth balance_iso_year_month(double year, double month);
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ISOYearMonth constrain_iso_year_month(double year, double month);
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PlainYearMonth* create_temporal_year_month(GlobalObject&, i32 iso_year, u8 iso_month, Object& calendar, u8 reference_iso_day, FunctionObject* new_target = nullptr);
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Optional<String> temporal_year_month_to_string(GlobalObject&, PlainYearMonth&, StringView show_calendar);
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}
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@ -6,6 +6,7 @@
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#include <AK/TypeCasts.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/Temporal/AbstractOperations.h>
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#include <LibJS/Runtime/Temporal/Calendar.h>
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#include <LibJS/Runtime/Temporal/PlainYearMonth.h>
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#include <LibJS/Runtime/Temporal/PlainYearMonthPrototype.h>
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@ -37,6 +38,7 @@ void PlainYearMonthPrototype::initialize(GlobalObject& global_object)
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define_native_accessor(vm.names.inLeapYear, in_leap_year_getter, {}, Attribute::Configurable);
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u8 attr = Attribute::Writable | Attribute::Configurable;
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define_native_function(vm.names.toString, to_string, 0, attr);
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define_native_function(vm.names.valueOf, value_of, 0, attr);
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define_native_function(vm.names.getISOFields, get_iso_fields, 0, attr);
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}
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@ -179,6 +181,33 @@ JS_DEFINE_NATIVE_FUNCTION(PlainYearMonthPrototype::in_leap_year_getter)
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return Value(calendar_in_leap_year(global_object, calendar, *year_month));
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}
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// 9.3.17 Temporal.PlainYearMonth.prototype.toString ( [ options ] ), https://tc39.es/proposal-temporal/#sec-temporal.plainyearmonth.prototype.tostring
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JS_DEFINE_NATIVE_FUNCTION(PlainYearMonthPrototype::to_string)
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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. Set options to ? GetOptionsObject(options).
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auto* options = get_options_object(global_object, vm.argument(0));
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if (vm.exception())
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return {};
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// 4. Let showCalendar be ? ToShowCalendarOption(options).
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auto show_calendar = to_show_calendar_option(global_object, *options);
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if (vm.exception())
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return {};
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// 5. Return ? TemporalYearMonthToString(yearMonth, showCalendar).
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auto string = temporal_year_month_to_string(global_object, *year_month, *show_calendar);
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if (vm.exception())
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return {};
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return js_string(vm, *string);
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}
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// 9.3.20 Temporal.PlainYearMonth.prototype.valueOf ( ), https://tc39.es/proposal-temporal/#sec-temporal.plainyearmonth.prototype.valueof
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JS_DEFINE_NATIVE_FUNCTION(PlainYearMonthPrototype::value_of)
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{
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@ -27,6 +27,7 @@ private:
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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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JS_DECLARE_NATIVE_FUNCTION(to_string);
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JS_DECLARE_NATIVE_FUNCTION(value_of);
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JS_DECLARE_NATIVE_FUNCTION(get_iso_fields);
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};
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@ -0,0 +1,51 @@
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describe("correct behavior", () => {
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test("length is 0", () => {
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expect(Temporal.PlainYearMonth.prototype.toString).toHaveLength(0);
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});
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test("basic functionality", () => {
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let plainYearMonth;
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plainYearMonth = new Temporal.PlainYearMonth(2021, 7);
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expect(plainYearMonth.toString()).toBe("2021-07");
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expect(plainYearMonth.toString({ calendarName: "auto" })).toBe("2021-07");
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expect(plainYearMonth.toString({ calendarName: "always" })).toBe("2021-07[u-ca=iso8601]");
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expect(plainYearMonth.toString({ calendarName: "never" })).toBe("2021-07");
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plainYearMonth = new Temporal.PlainYearMonth(2021, 7, { toString: () => "foo" }, 6);
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expect(plainYearMonth.toString()).toBe("2021-07-06[u-ca=foo]");
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expect(plainYearMonth.toString({ calendarName: "auto" })).toBe("2021-07-06[u-ca=foo]");
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expect(plainYearMonth.toString({ calendarName: "always" })).toBe("2021-07-06[u-ca=foo]");
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expect(plainYearMonth.toString({ calendarName: "never" })).toBe("2021-07-06");
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plainYearMonth = new Temporal.PlainYearMonth(0, 1);
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expect(plainYearMonth.toString()).toBe("+000000-01");
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plainYearMonth = new Temporal.PlainYearMonth(999, 1);
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expect(plainYearMonth.toString()).toBe("+000999-01");
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plainYearMonth = new Temporal.PlainYearMonth(12345, 1);
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expect(plainYearMonth.toString()).toBe("+012345-01");
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plainYearMonth = new Temporal.PlainYearMonth(123456, 1);
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expect(plainYearMonth.toString()).toBe("+123456-01");
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plainYearMonth = new Temporal.PlainYearMonth(-12345, 1);
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expect(plainYearMonth.toString()).toBe("-012345-01");
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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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Temporal.PlainYearMonth.prototype.toString.call("foo");
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}).toThrowWithMessage(TypeError, "Not a Temporal.PlainYearMonth");
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});
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test("calendarName option must be one of 'auto', 'always', 'never'", () => {
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const plainYearMonth = new Temporal.PlainYearMonth(2021, 7);
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expect(() => {
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plainYearMonth.toString({ calendarName: "foo" });
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}).toThrowWithMessage(RangeError, "foo is not a valid value for option calendarName");
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});
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});
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