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LibJS: Implement Intl.RelativeTimeFormat.prototype.resolvedOptions
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@ -23,6 +23,33 @@ void RelativeTimeFormatPrototype::initialize(GlobalObject& global_object)
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// 17.4.2 Intl.RelativeTimeFormat.prototype[ @@toStringTag ], https://tc39.es/ecma402/#sec-Intl.RelativeTimeFormat.prototype-toStringTag
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define_direct_property(*vm.well_known_symbol_to_string_tag(), js_string(vm, "Intl.RelativeTimeFormat"sv), Attribute::Configurable);
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u8 attr = Attribute::Writable | Attribute::Configurable;
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define_native_function(vm.names.resolvedOptions, resolved_options, 0, attr);
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}
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// 17.4.5 Intl.RelativeTimeFormat.prototype.resolvedOptions ( ), https://tc39.es/ecma402/#sec-intl.relativetimeformat.prototype.resolvedoptions
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JS_DEFINE_NATIVE_FUNCTION(RelativeTimeFormatPrototype::resolved_options)
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{
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// 1. Let relativeTimeFormat be the this value.
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// 2. Perform ? RequireInternalSlot(relativeTimeFormat, [[InitializedRelativeTimeFormat]]).
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auto* relative_time_format = TRY(typed_this_object(global_object));
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// 3. Let options be ! OrdinaryObjectCreate(%Object.prototype%).
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auto* options = Object::create(global_object, global_object.object_prototype());
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// 4. For each row of Table 15, except the header row, in table order, do
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// a. Let p be the Property value of the current row.
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// b. Let v be the value of relativeTimeFormat's internal slot whose name is the Internal Slot value of the current row.
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// c. Assert: v is not undefined.
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// d. Perform ! CreateDataPropertyOrThrow(options, p, v).
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MUST(options->create_data_property_or_throw(vm.names.locale, js_string(vm, relative_time_format->locale())));
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MUST(options->create_data_property_or_throw(vm.names.style, js_string(vm, relative_time_format->style_string())));
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MUST(options->create_data_property_or_throw(vm.names.numeric, js_string(vm, relative_time_format->numeric_string())));
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MUST(options->create_data_property_or_throw(vm.names.numberingSystem, js_string(vm, relative_time_format->numbering_system())));
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// 5. Return options.
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return options;
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}
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}
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@ -18,6 +18,9 @@ public:
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explicit RelativeTimeFormatPrototype(GlobalObject&);
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virtual void initialize(GlobalObject&) override;
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virtual ~RelativeTimeFormatPrototype() override = default;
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private:
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JS_DECLARE_NATIVE_FUNCTION(resolved_options);
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};
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}
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@ -0,0 +1,79 @@
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describe("correct behavior", () => {
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test("length is 0", () => {
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expect(Intl.RelativeTimeFormat.prototype.resolvedOptions).toHaveLength(0);
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});
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test("locale only contains relevant extension keys", () => {
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const en1 = new Intl.RelativeTimeFormat("en-u-ca-islamicc");
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expect(en1.resolvedOptions().locale).toBe("en");
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const en2 = new Intl.RelativeTimeFormat("en-u-nu-latn");
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expect(en2.resolvedOptions().locale).toBe("en-u-nu-latn");
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const en3 = new Intl.RelativeTimeFormat("en-u-ca-islamicc-nu-latn");
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expect(en3.resolvedOptions().locale).toBe("en-u-nu-latn");
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});
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test("numberingSystem may be set by option", () => {
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const en = new Intl.RelativeTimeFormat("en", { numberingSystem: "latn" });
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expect(en.resolvedOptions().numberingSystem).toBe("latn");
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const el = new Intl.RelativeTimeFormat("el", { numberingSystem: "latn" });
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expect(el.resolvedOptions().numberingSystem).toBe("latn");
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});
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test("numberingSystem may be set by locale extension", () => {
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const en = new Intl.RelativeTimeFormat("en-u-nu-latn");
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expect(en.resolvedOptions().numberingSystem).toBe("latn");
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const el = new Intl.RelativeTimeFormat("el-u-nu-latn");
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expect(el.resolvedOptions().numberingSystem).toBe("latn");
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});
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test("numberingSystem option overrides locale extension", () => {
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const el = new Intl.RelativeTimeFormat("el-u-nu-latn", { numberingSystem: "grek" });
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expect(el.resolvedOptions().numberingSystem).toBe("grek");
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});
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test("numberingSystem option limited to known 'nu' values", () => {
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["latn", "arab"].forEach(numberingSystem => {
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const en = new Intl.RelativeTimeFormat("en", { numberingSystem: numberingSystem });
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expect(en.resolvedOptions().numberingSystem).toBe("latn");
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});
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["latn", "arab"].forEach(numberingSystem => {
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const en = new Intl.RelativeTimeFormat(`en-u-nu-${numberingSystem}`);
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expect(en.resolvedOptions().numberingSystem).toBe("latn");
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});
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["latn", "grek"].forEach(numberingSystem => {
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const el = new Intl.RelativeTimeFormat("el", { numberingSystem: numberingSystem });
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expect(el.resolvedOptions().numberingSystem).toBe(numberingSystem);
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});
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["latn", "grek"].forEach(numberingSystem => {
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const el = new Intl.RelativeTimeFormat(`el-u-nu-${numberingSystem}`);
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expect(el.resolvedOptions().numberingSystem).toBe(numberingSystem);
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});
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});
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test("style", () => {
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const en1 = new Intl.RelativeTimeFormat("en");
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expect(en1.resolvedOptions().style).toBe("long");
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["long", "short", "narrow"].forEach(style => {
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const en2 = new Intl.RelativeTimeFormat("en", { style: style });
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expect(en2.resolvedOptions().style).toBe(style);
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});
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});
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test("numeric", () => {
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const en1 = new Intl.RelativeTimeFormat("en");
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expect(en1.resolvedOptions().numeric).toBe("always");
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["always", "auto"].forEach(numeric => {
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const en2 = new Intl.RelativeTimeFormat("en", { numeric: numeric });
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expect(en2.resolvedOptions().numeric).toBe(numeric);
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});
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});
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});
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