LibJS: Implement Intl.DateTimeFormat.prototype.resolvedOptions

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

@@ -0,0 +1,123 @@
+// NOTE: We cannot yet test the fields of ECMA-402's Table 4 (week, day, etc.) because those fields
+//       won't be copied into the Intl.DateTimeFormat object until the date-time pattern generator
+//       actually parses the CLDR patterns (see parse_date_time_pattern).
+describe("correct behavior", () => {
+    test("length is 0", () => {
+        expect(Intl.DateTimeFormat.prototype.resolvedOptions).toHaveLength(0);
+    });
+
+    test("locale only contains relevant extension keys", () => {
+        const en1 = Intl.NumberFormat("en-u-ca-islamicc");
+        expect(en1.resolvedOptions().locale).toBe("en");
+
+        const en2 = Intl.NumberFormat("en-u-nu-latn");
+        expect(en2.resolvedOptions().locale).toBe("en-u-nu-latn");
+
+        const en3 = Intl.NumberFormat("en-u-ca-islamicc-nu-latn");
+        expect(en3.resolvedOptions().locale).toBe("en-u-nu-latn");
+    });
+
+    test("calendar may be set by option", () => {
+        const en = Intl.DateTimeFormat("en", { calendar: "gregory" });
+        expect(en.resolvedOptions().calendar).toBe("gregory");
+
+        const el = Intl.DateTimeFormat("el", { calendar: "generic" });
+        expect(el.resolvedOptions().calendar).toBe("generic");
+    });
+
+    test("calendar may be set by locale extension", () => {
+        const en = Intl.DateTimeFormat("en-u-ca-gregory");
+        expect(en.resolvedOptions().calendar).toBe("gregory");
+
+        const el = Intl.DateTimeFormat("el-u-ca-generic");
+        expect(el.resolvedOptions().calendar).toBe("generic");
+    });
+
+    test("calendar option overrides locale extension", () => {
+        const el = Intl.DateTimeFormat("el-u-ca-generic", { calendar: "gregory" });
+        expect(el.resolvedOptions().calendar).toBe("gregory");
+    });
+
+    test("calendar option limited to known 'ca' values", () => {
+        ["generic", "hello"].forEach(calendar => {
+            const en = Intl.DateTimeFormat("en", { calendar: calendar });
+            expect(en.resolvedOptions().calendar).toBe("generic");
+        });
+
+        ["generic", "hello"].forEach(calendar => {
+            const en = Intl.DateTimeFormat(`en-u-ca-${calendar}`);
+            expect(en.resolvedOptions().calendar).toBe("generic");
+        });
+    });
+
+    test("numberingSystem may be set by option", () => {
+        const en = Intl.DateTimeFormat("en", { numberingSystem: "latn" });
+        expect(en.resolvedOptions().numberingSystem).toBe("latn");
+
+        const el = Intl.DateTimeFormat("el", { numberingSystem: "latn" });
+        expect(el.resolvedOptions().numberingSystem).toBe("latn");
+    });
+
+    test("numberingSystem may be set by locale extension", () => {
+        const en = Intl.DateTimeFormat("en-u-nu-latn");
+        expect(en.resolvedOptions().numberingSystem).toBe("latn");
+
+        const el = Intl.DateTimeFormat("el-u-nu-latn");
+        expect(el.resolvedOptions().numberingSystem).toBe("latn");
+    });
+
+    test("numberingSystem option overrides locale extension", () => {
+        const el = Intl.DateTimeFormat("el-u-nu-latn", { numberingSystem: "grek" });
+        expect(el.resolvedOptions().numberingSystem).toBe("grek");
+    });
+
+    test("numberingSystem option limited to known 'nu' values", () => {
+        ["latn", "arab"].forEach(numberingSystem => {
+            const en = Intl.DateTimeFormat("en", { numberingSystem: numberingSystem });
+            expect(en.resolvedOptions().numberingSystem).toBe("latn");
+        });
+
+        ["latn", "arab"].forEach(numberingSystem => {
+            const en = Intl.DateTimeFormat(`en-u-nu-${numberingSystem}`);
+            expect(en.resolvedOptions().numberingSystem).toBe("latn");
+        });
+
+        ["latn", "grek"].forEach(numberingSystem => {
+            const el = Intl.DateTimeFormat("el", { numberingSystem: numberingSystem });
+            expect(el.resolvedOptions().numberingSystem).toBe(numberingSystem);
+        });
+
+        ["latn", "grek"].forEach(numberingSystem => {
+            const el = Intl.DateTimeFormat(`el-u-nu-${numberingSystem}`);
+            expect(el.resolvedOptions().numberingSystem).toBe(numberingSystem);
+        });
+    });
+
+    test("style", () => {
+        const en = new Intl.DateTimeFormat("en");
+        expect(en.resolvedOptions().timeZone).toBe("UTC");
+
+        const el = new Intl.DateTimeFormat("el", { timeZone: "UTC" });
+        expect(el.resolvedOptions().timeZone).toBe("UTC");
+    });
+
+    test("dateStyle", () => {
+        const en = new Intl.DateTimeFormat("en");
+        expect(en.resolvedOptions().dateStyle).toBeUndefined();
+
+        ["full", "long", "medium", "short"].forEach(style => {
+            const el = new Intl.DateTimeFormat("el", { dateStyle: style });
+            expect(el.resolvedOptions().dateStyle).toBe(style);
+        });
+    });
+
+    test("timeStyle", () => {
+        const en = new Intl.DateTimeFormat("en");
+        expect(en.resolvedOptions().timeStyle).toBeUndefined();
+
+        ["full", "long", "medium", "short"].forEach(style => {
+            const el = new Intl.DateTimeFormat("el", { timeStyle: style });
+            expect(el.resolvedOptions().timeStyle).toBe(style);
+        });
+    });
+});