LibJS: Implement Intl.PluralRules.prototype.resolvedOptions

2025-07-28 13:17:34 +00:00 · 2022-01-28 13:42:20 -05:00 · 2022-01-28 13:42:20 -05:00 · 74939eb943
commit 74939eb943
parent 8b3f49ff84
4 changed files with 134 additions and 0 deletions
--- a/Userland/Libraries/LibJS/Tests/builtins/Intl/PluralRules/PluralRules.prototype.resolvedOptions.js
+++ b/Userland/Libraries/LibJS/Tests/builtins/Intl/PluralRules/PluralRules.prototype.resolvedOptions.js
@ -0,0 +1,87 @@
+describe("correct behavior", () => {
+    test("length is 0", () => {
+        expect(Intl.PluralRules.prototype.resolvedOptions).toHaveLength(0);
+    });
+
+    test("locale only contains relevant extension keys", () => {
+        const en1 = new Intl.PluralRules("en-u-ca-islamicc");
+        expect(en1.resolvedOptions().locale).toBe("en");
+
+        const en2 = new Intl.PluralRules("en-u-nu-latn");
+        expect(en2.resolvedOptions().locale).toBe("en");
+
+        const en3 = new Intl.PluralRules("en-u-ca-islamicc-nu-latn");
+        expect(en3.resolvedOptions().locale).toBe("en");
+    });
+
+    test("type", () => {
+        const en1 = new Intl.PluralRules("en");
+        expect(en1.resolvedOptions().type).toBe("cardinal");
+
+        ["cardinal", "ordinal"].forEach(type => {
+            const en2 = new Intl.PluralRules("en", { type: type });
+            expect(en2.resolvedOptions().type).toBe(type);
+        });
+    });
+
+    test("min integer digits", () => {
+        const en1 = new Intl.PluralRules("en");
+        expect(en1.resolvedOptions().minimumIntegerDigits).toBe(1);
+
+        const en2 = new Intl.PluralRules("en", { minimumIntegerDigits: 5 });
+        expect(en2.resolvedOptions().minimumIntegerDigits).toBe(5);
+    });
+
+    test("min/max fraction digits", () => {
+        const en1 = new Intl.PluralRules("en", { minimumFractionDigits: 5 });
+        expect(en1.resolvedOptions().minimumFractionDigits).toBe(5);
+        expect(en1.resolvedOptions().maximumFractionDigits).toBe(5);
+        expect(en1.resolvedOptions().minimumSignificantDigits).toBeUndefined();
+        expect(en1.resolvedOptions().maximumSignificantDigits).toBeUndefined();
+
+        const en2 = new Intl.PluralRules("en", { maximumFractionDigits: 5 });
+        expect(en2.resolvedOptions().minimumFractionDigits).toBe(0);
+        expect(en2.resolvedOptions().maximumFractionDigits).toBe(5);
+        expect(en2.resolvedOptions().minimumSignificantDigits).toBeUndefined();
+        expect(en2.resolvedOptions().maximumSignificantDigits).toBeUndefined();
+
+        const en3 = new Intl.PluralRules("en", {
+            minimumFractionDigits: 5,
+            maximumFractionDigits: 10,
+        });
+        expect(en3.resolvedOptions().minimumFractionDigits).toBe(5);
+        expect(en3.resolvedOptions().maximumFractionDigits).toBe(10);
+        expect(en3.resolvedOptions().minimumSignificantDigits).toBeUndefined();
+        expect(en3.resolvedOptions().maximumSignificantDigits).toBeUndefined();
+    });
+
+    test("min/max significant digits", () => {
+        const en1 = new Intl.PluralRules("en", { minimumSignificantDigits: 5 });
+        expect(en1.resolvedOptions().minimumFractionDigits).toBeUndefined();
+        expect(en1.resolvedOptions().maximumFractionDigits).toBeUndefined();
+        expect(en1.resolvedOptions().minimumSignificantDigits).toBe(5);
+        expect(en1.resolvedOptions().maximumSignificantDigits).toBe(21);
+
+        const en2 = new Intl.PluralRules("en", { maximumSignificantDigits: 5 });
+        expect(en2.resolvedOptions().minimumFractionDigits).toBeUndefined();
+        expect(en2.resolvedOptions().maximumFractionDigits).toBeUndefined();
+        expect(en2.resolvedOptions().minimumSignificantDigits).toBe(1);
+        expect(en2.resolvedOptions().maximumSignificantDigits).toBe(5);
+
+        const en3 = new Intl.PluralRules("en", {
+            minimumSignificantDigits: 5,
+            maximumSignificantDigits: 10,
+        });
+        expect(en3.resolvedOptions().minimumFractionDigits).toBeUndefined();
+        expect(en3.resolvedOptions().maximumFractionDigits).toBeUndefined();
+        expect(en3.resolvedOptions().minimumSignificantDigits).toBe(5);
+        expect(en3.resolvedOptions().maximumSignificantDigits).toBe(10);
+    });
+
+    test("plural categories", () => {
+        // FIXME: Write better tests when this is implemented.
+        const en = new Intl.PluralRules("en");
+        expect(en.resolvedOptions().pluralCategories).toBeDefined();
+        expect(en.resolvedOptions().pluralCategories).toEqual([]);
+    });
+});