LibJS: Implement Temporal.PlainDate.prototype.toZonedDateTime()

1 files changed, 86 insertions, 0 deletions

diff --git a/Userland/Libraries/LibJS/Tests/builtins/Temporal/PlainDate/PlainDate.prototype.toZonedDateTime.js b/Userland/Libraries/LibJS/Tests/builtins/Temporal/PlainDate/PlainDate.prototype.toZonedDateTime.js
new file mode 100644
index 0000000000..f6c57d8908
--- /dev/null
+++ b/Userland/Libraries/LibJS/Tests/builtins/Temporal/PlainDate/PlainDate.prototype.toZonedDateTime.js
@@ -0,0 +1,86 @@
+describe("correct behavior", () => {
+    test("length is 1", () => {
+        expect(Temporal.PlainDate.prototype.toZonedDateTime).toHaveLength(1);
+    });
+
+    test("basic functionality - time zone", () => {
+        // 3.b. in the spec
+        const plainDate = new Temporal.PlainDate(2021, 7, 6);
+        const timeZone = new Temporal.TimeZone("UTC");
+        const zonedDateTime = plainDate.toZonedDateTime(timeZone);
+        expect(zonedDateTime.year).toBe(2021);
+        expect(zonedDateTime.month).toBe(7);
+        expect(zonedDateTime.day).toBe(6);
+        expect(zonedDateTime.hour).toBe(0);
+        expect(zonedDateTime.minute).toBe(0);
+        expect(zonedDateTime.second).toBe(0);
+        expect(zonedDateTime.millisecond).toBe(0);
+        expect(zonedDateTime.microsecond).toBe(0);
+        expect(zonedDateTime.nanosecond).toBe(0);
+        expect(zonedDateTime.calendar).toBe(plainDate.calendar);
+        expect(zonedDateTime.timeZone).toBe(timeZone);
+    });
+
+    test("basic functionality - time zone like object", () => {
+        // 3.c. in the spec
+        const plainDate = new Temporal.PlainDate(2021, 7, 6);
+        const timeZone = new Temporal.TimeZone("UTC");
+        const zonedDateTime = plainDate.toZonedDateTime({ timeZone });
+        expect(zonedDateTime.year).toBe(2021);
+        expect(zonedDateTime.month).toBe(7);
+        expect(zonedDateTime.day).toBe(6);
+        expect(zonedDateTime.hour).toBe(0);
+        expect(zonedDateTime.minute).toBe(0);
+        expect(zonedDateTime.second).toBe(0);
+        expect(zonedDateTime.millisecond).toBe(0);
+        expect(zonedDateTime.microsecond).toBe(0);
+        expect(zonedDateTime.nanosecond).toBe(0);
+        expect(zonedDateTime.calendar).toBe(plainDate.calendar);
+        expect(zonedDateTime.timeZone).toBe(timeZone);
+    });
+
+    test("basic functionality - time zone like object and plain time", () => {
+        // 3.c. in the spec
+        const plainDate = new Temporal.PlainDate(2021, 7, 6);
+        const plainTime = new Temporal.PlainTime(18, 14, 47, 123, 456, 789);
+        const timeZone = new Temporal.TimeZone("UTC");
+        const zonedDateTime = plainDate.toZonedDateTime({ timeZone, plainTime });
+        expect(zonedDateTime.year).toBe(2021);
+        expect(zonedDateTime.month).toBe(7);
+        expect(zonedDateTime.day).toBe(6);
+        expect(zonedDateTime.hour).toBe(18);
+        expect(zonedDateTime.minute).toBe(14);
+        expect(zonedDateTime.second).toBe(47);
+        expect(zonedDateTime.millisecond).toBe(123);
+        expect(zonedDateTime.microsecond).toBe(456);
+        expect(zonedDateTime.nanosecond).toBe(789);
+        expect(zonedDateTime.calendar).toBe(plainDate.calendar);
+        expect(zonedDateTime.timeZone).toBe(timeZone);
+    });
+
+    // TODO: Enable when parse_temporal_time_zone_string() is fully implemented
+    test.skip("basic functionality - time zone identifier", () => {
+        // 4. in the spec
+        const plainDate = new Temporal.PlainDate(2021, 7, 6);
+        const zonedDateTime = plainDate.toZonedDateTime("UTC");
+        expect(zonedDateTime.year).toBe(2021);
+        expect(zonedDateTime.month).toBe(7);
+        expect(zonedDateTime.day).toBe(6);
+        expect(zonedDateTime.hour).toBe(0);
+        expect(zonedDateTime.minute).toBe(0);
+        expect(zonedDateTime.second).toBe(0);
+        expect(zonedDateTime.millisecond).toBe(0);
+        expect(zonedDateTime.microsecond).toBe(0);
+        expect(zonedDateTime.nanosecond).toBe(0);
+        expect(zonedDateTime.calendar).toBe(plainDate.calendar);
+        expect(zonedDateTime.timeZone.id).toBe("UTC");
+    });
+});
+
+describe("errors", () => {
+    test("this value must be a Temporal.PlainDate object", () => {
+        expect(() => {
+            Temporal.PlainDate.prototype.toZonedDateTime.call("foo");
+        }).toThrowWithMessage(TypeError, "Not an object of type Temporal.PlainDate");
+    });
+});