LibJS: Implement Intl.Segmenter.prototype.resolvedOptions

Userland/Libraries/LibJS/Runtime/Intl/SegmenterPrototype.cpp

@@ -24,6 +24,31 @@ void SegmenterPrototype::initialize(GlobalObject& global_object)
 
     // 18.3.2 Intl.Segmenter.prototype [ @@toStringTag ], https://tc39.es/ecma402/#sec-intl.segmenter.prototype-@@tostringtag
     define_direct_property(*vm.well_known_symbol_to_string_tag(), js_string(vm, "Intl.Segmenter"), Attribute::Configurable);
+
+    u8 attr = Attribute::Writable | Attribute::Configurable;
+    define_native_function(vm.names.resolvedOptions, resolved_options, 0, attr);
+}
+
+// 18.3.4 Intl.Segmenter.prototype.resolvedOptions ( ), https://tc39.es/ecma402/#sec-intl.segmenter.prototype.resolvedoptions
+JS_DEFINE_NATIVE_FUNCTION(SegmenterPrototype::resolved_options)
+{
+    // 1. Let segmenter be the this value.
+    // 2. Perform ? RequireInternalSlot(segmenter, [[InitializedSegmenter]]).
+    auto* segmenter = TRY(typed_this_object(global_object));
+
+    // 3. Let options be ! OrdinaryObjectCreate(%Object.prototype%).
+    auto* options = Object::create(global_object, global_object.object_prototype());
+
+    // 4. For each row of Table 16, except the header row, in table order, do
+    //     a. Let p be the Property value of the current row.
+    //     b. Let v be the value of segmenter's internal slot whose name is the Internal Slot value of the current row.
+    //     c. Assert: v is not undefined.
+    //     d. Perform ! CreateDataPropertyOrThrow(options, p, v).
+    MUST(options->create_data_property_or_throw(vm.names.locale, js_string(vm, segmenter->locale())));
+    MUST(options->create_data_property_or_throw(vm.names.granularity, js_string(vm, segmenter->segmenter_granularity_string())));
+
+    // 5. Return options.
+    return options;
 }
 
 }

Userland/Libraries/LibJS/Runtime/Intl/SegmenterPrototype.h

@@ -18,6 +18,9 @@ public:
     explicit SegmenterPrototype(GlobalObject&);
     virtual void initialize(GlobalObject&) override;
     virtual ~SegmenterPrototype() override = default;
+
+private:
+    JS_DECLARE_NATIVE_FUNCTION(resolved_options);
 };
 
 }

Userland/Libraries/LibJS/Tests/builtins/Intl/Segmenter/Segmenter.prototype.resolvedOptions.js

@@ -0,0 +1,26 @@
+describe("correct behavior", () => {
+    test("length is 0", () => {
+        expect(Intl.Segmenter.prototype.resolvedOptions).toHaveLength(0);
+    });
+
+    test("locale only contains relevant extension keys", () => {
+        const en1 = new Intl.Segmenter("en-u-ca-islamicc");
+        expect(en1.resolvedOptions().locale).toBe("en");
+
+        const en2 = new Intl.Segmenter("en-u-nu-latn");
+        expect(en2.resolvedOptions().locale).toBe("en");
+
+        const en3 = new Intl.Segmenter("en-u-ca-islamicc-nu-latn");
+        expect(en3.resolvedOptions().locale).toBe("en");
+    });
+
+    test("granularity", () => {
+        const en1 = new Intl.Segmenter("en");
+        expect(en1.resolvedOptions().granularity).toBe("grapheme");
+
+        ["grapheme", "word", "sentence"].forEach(granularity => {
+            const en2 = new Intl.Segmenter("en", { granularity: granularity });
+            expect(en2.resolvedOptions().granularity).toBe(granularity);
+        });
+    });
+});