LibJS: Implement Intl.RelativeTimeFormat.prototype.formatToParts

2025-07-27 16:27:35 +00:00 · 2022-01-26 22:44:01 -05:00 · 2022-01-26 22:44:01 -05:00 · a2e791277e
commit a2e791277e
parent 9c5d7e515c
5 changed files with 210 additions and 0 deletions
--- a/Userland/Libraries/LibJS/Tests/builtins/Intl/RelativeTimeFormat/RelativeTimeFormat.prototype.formatToParts.js
+++ b/Userland/Libraries/LibJS/Tests/builtins/Intl/RelativeTimeFormat/RelativeTimeFormat.prototype.formatToParts.js
@ -0,0 +1,146 @@
+describe("errors", () => {
+    test("called on non-RelativeimeFormat object", () => {
+        expect(() => {
+            Intl.RelativeTimeFormat.prototype.formatToParts(1);
+        }).toThrowWithMessage(TypeError, "Not an object of type Intl.RelativeTimeFormat");
+    });
+
+    test("called with value that cannot be converted to a number", () => {
+        expect(() => {
+            new Intl.RelativeTimeFormat().formatToParts(Symbol.hasInstance, "year");
+        }).toThrowWithMessage(TypeError, "Cannot convert symbol to number");
+
+        expect(() => {
+            new Intl.RelativeTimeFormat().formatToParts(1n, "year");
+        }).toThrowWithMessage(TypeError, "Cannot convert BigInt to number");
+    });
+
+    test("called with unit that cannot be converted to a number", () => {
+        expect(() => {
+            new Intl.RelativeTimeFormat().formatToParts(1, Symbol.hasInstance);
+        }).toThrowWithMessage(TypeError, "Cannot convert symbol to string");
+    });
+
+    test("called with non-finite value", () => {
+        expect(() => {
+            new Intl.RelativeTimeFormat().formatToParts(Infinity, "year");
+        }).toThrowWithMessage(RangeError, "Number must not be NaN or Infinity");
+
+        expect(() => {
+            new Intl.RelativeTimeFormat().formatToParts(-Infinity, "year");
+        }).toThrowWithMessage(RangeError, "Number must not be NaN or Infinity");
+
+        expect(() => {
+            new Intl.RelativeTimeFormat().formatToParts(NaN, "year");
+        }).toThrowWithMessage(RangeError, "Number must not be NaN or Infinity");
+    });
+
+    test("called with non-sanctioned unit", () => {
+        expect(() => {
+            new Intl.RelativeTimeFormat().formatToParts(1);
+        }).toThrowWithMessage(RangeError, "Unit undefined is not a valid time unit");
+
+        expect(() => {
+            new Intl.RelativeTimeFormat().formatToParts(1, null);
+        }).toThrowWithMessage(RangeError, "Unit null is not a valid time unit");
+
+        expect(() => {
+            new Intl.RelativeTimeFormat().formatToParts(1, "hello!");
+        }).toThrowWithMessage(RangeError, "Unit hello! is not a valid time unit");
+    });
+});
+
+const en = new Intl.RelativeTimeFormat("en", { style: "long", numeric: "always" });
+const ar = new Intl.RelativeTimeFormat("ar", { style: "narrow", numeric: "auto" });
+
+describe("correct behavior", () => {
+    test("second", () => {
+        expect(en.formatToParts(5, "second")).toEqual([
+            { type: "literal", value: "in " },
+            { type: "integer", value: "5", unit: "second" },
+            { type: "literal", value: " seconds" },
+        ]);
+
+        expect(ar.formatToParts(-1, "second")).toEqual([
+            { type: "literal", value: "قبل ثانية واحدة" },
+        ]);
+    });
+
+    test("minute", () => {
+        expect(en.formatToParts(5, "minute")).toEqual([
+            { type: "literal", value: "in " },
+            { type: "integer", value: "5", unit: "minute" },
+            { type: "literal", value: " minutes" },
+        ]);
+
+        expect(ar.formatToParts(-1, "minute")).toEqual([
+            { type: "literal", value: "قبل دقيقة واحدة" },
+        ]);
+    });
+
+    test("hour", () => {
+        expect(en.formatToParts(5, "hour")).toEqual([
+            { type: "literal", value: "in " },
+            { type: "integer", value: "5", unit: "hour" },
+            { type: "literal", value: " hours" },
+        ]);
+
+        expect(ar.formatToParts(-1, "hour")).toEqual([
+            { type: "literal", value: "قبل ساعة واحدة" },
+        ]);
+    });
+
+    test("day", () => {
+        expect(en.formatToParts(5, "day")).toEqual([
+            { type: "literal", value: "in " },
+            { type: "integer", value: "5", unit: "day" },
+            { type: "literal", value: " days" },
+        ]);
+
+        expect(ar.formatToParts(-1, "day")).toEqual([{ type: "literal", value: "أمس" }]);
+    });
+
+    test("week", () => {
+        expect(en.formatToParts(5, "week")).toEqual([
+            { type: "literal", value: "in " },
+            { type: "integer", value: "5", unit: "week" },
+            { type: "literal", value: " weeks" },
+        ]);
+
+        expect(ar.formatToParts(-1, "week")).toEqual([
+            { type: "literal", value: "الأسبوع الماضي" },
+        ]);
+    });
+
+    test("month", () => {
+        expect(en.formatToParts(5, "month")).toEqual([
+            { type: "literal", value: "in " },
+            { type: "integer", value: "5", unit: "month" },
+            { type: "literal", value: " months" },
+        ]);
+
+        expect(ar.formatToParts(-1, "month")).toEqual([{ type: "literal", value: "الشهر الماضي" }]);
+    });
+
+    test("quarter", () => {
+        expect(en.formatToParts(5, "quarter")).toEqual([
+            { type: "literal", value: "in " },
+            { type: "integer", value: "5", unit: "quarter" },
+            { type: "literal", value: " quarters" },
+        ]);
+
+        expect(ar.formatToParts(-1, "quarter")).toEqual([
+            { type: "literal", value: "الربع الأخير" },
+        ]);
+    });
+
+    test("year", () => {
+        expect(en.formatToParts(5, "year")).toEqual([
+            { type: "literal", value: "in " },
+            { type: "integer", value: "5", unit: "year" },
+            { type: "literal", value: " years" },
+        ]);
+
+        expect(ar.formatToParts(-1, "year")).toEqual([{ type: "literal", value: "السنة الماضية" }]);
+    });
+});