LibJS: Implement the Temporal.PlainMonthDay constructor

And the simple Temporal.PlainMonthDay.prototype getters, so that the constructed Temporal.PlainMonthDay may actually be validated.
Author: https://github.com/trflynn89 Commit: 1a386e78c3 Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2471
2025-09-06 01:26:22 +00:00 · 2024-11-20 12:59:15 -05:00 · 2024-11-20 12:59:15 -05:00 · 1a386e78c3 · 2024-11-22 00:25:44 +00:00
commit 1a386e78c3
parent b3b968bed9
31 changed files with 2515 additions and 4 deletions
--- a/Libraries/LibJS/Tests/builtins/Temporal/PlainMonthDay/PlainMonthDay.js
+++ b/Libraries/LibJS/Tests/builtins/Temporal/PlainMonthDay/PlainMonthDay.js
@ -0,0 +1,66 @@
+describe("errors", () => {
+    test("called without new", () => {
+        expect(() => {
+            Temporal.PlainMonthDay();
+        }).toThrowWithMessage(
+            TypeError,
+            "Temporal.PlainMonthDay constructor must be called with 'new'"
+        );
+    });
+
+    test("cannot pass Infinity", () => {
+        expect(() => {
+            new Temporal.PlainMonthDay(Infinity);
+        }).toThrowWithMessage(RangeError, "Invalid plain month day");
+        expect(() => {
+            new Temporal.PlainMonthDay(1, Infinity);
+        }).toThrowWithMessage(RangeError, "Invalid plain month day");
+        expect(() => {
+            new Temporal.PlainMonthDay(1, 1, undefined, Infinity);
+        }).toThrowWithMessage(RangeError, "Invalid plain month day");
+        expect(() => {
+            new Temporal.PlainMonthDay(-Infinity);
+        }).toThrowWithMessage(RangeError, "Invalid plain month day");
+        expect(() => {
+            new Temporal.PlainMonthDay(1, -Infinity);
+        }).toThrowWithMessage(RangeError, "Invalid plain month day");
+        expect(() => {
+            new Temporal.PlainMonthDay(1, 1, undefined, -Infinity);
+        }).toThrowWithMessage(RangeError, "Invalid plain month day");
+    });
+
+    test("cannot pass invalid ISO month/day", () => {
+        expect(() => {
+            new Temporal.PlainMonthDay(0, 1);
+        }).toThrowWithMessage(RangeError, "Invalid plain month day");
+        expect(() => {
+            new Temporal.PlainMonthDay(1, 0);
+        }).toThrowWithMessage(RangeError, "Invalid plain month day");
+    });
+
+    test("not within iso date time limit", () => {
+        expect(() => {
+            new Temporal.PlainMonthDay(9, 30, "iso8601", 999_999_999_999_999);
+        }).toThrowWithMessage(RangeError, "Invalid plain month day");
+    });
+});
+
+describe("normal behavior", () => {
+    test("length is 2", () => {
+        expect(Temporal.PlainMonthDay).toHaveLength(2);
+    });
+
+    test("basic functionality", () => {
+        const plainMonthDay = new Temporal.PlainMonthDay(7, 6);
+        expect(typeof plainMonthDay).toBe("object");
+        expect(plainMonthDay).toBeInstanceOf(Temporal.PlainMonthDay);
+        expect(Object.getPrototypeOf(plainMonthDay)).toBe(Temporal.PlainMonthDay.prototype);
+    });
+
+    // FIXME: Re-implement this test with Temporal.PlainMonthDay.prototype.toString({ calendarName: "always" }).
+    // test("default reference year is 1972", () => {
+    //     const plainMonthDay = new Temporal.PlainMonthDay(7, 6);
+    //     const fields = plainMonthDay.getISOFields();
+    //     expect(fields.isoYear).toBe(1972);
+    // });
+});