Everywhere: Hoist the Libraries folder to the top-level

Author: https://github.com/trflynn89
Commit: 93712b24bf
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2256
Reviewed-by: https://github.com/sideshowbarker

Libraries/LibJS/Tests/builtins/Temporal/Now/Now.plainTimeISO.js

@@ -0,0 +1,44 @@
+describe("correct behavior", () => {
+    test("length is 0", () => {
+        expect(Temporal.Now.plainTimeISO).toHaveLength(0);
+    });
+
+    test("basic functionality", () => {
+        const plainTime = Temporal.Now.plainTimeISO();
+        expect(plainTime).toBeInstanceOf(Temporal.PlainTime);
+        expect(plainTime.calendar.id).toBe("iso8601");
+    });
+
+    test("custom time zone", () => {
+        const timeZone = {
+            getOffsetNanosecondsFor() {
+                return 86399999999999;
+            },
+        };
+        const plainTime = Temporal.Now.plainTimeISO("UTC");
+        const plainTimeWithOffset = Temporal.Now.plainTimeISO(timeZone);
+        // FIXME: Compare these in a sensible way
+    });
+
+    test("cannot have a time zone with more than a day", () => {
+        [86400000000000, -86400000000000, 86400000000001, 86400000000002].forEach(offset => {
+            const timeZone = {
+                getOffsetNanosecondsFor() {
+                    return offset;
+                },
+            };
+            expect(() => Temporal.Now.plainTimeISO(timeZone)).toThrowWithMessage(
+                RangeError,
+                "Invalid offset nanoseconds value, must be in range -86400 * 10^9 + 1 to 86400 * 10^9 - 1"
+            );
+        });
+    });
+});
+
+describe("errors", () => {
+    test("custom time zone doesn't have a getOffsetNanosecondsFor function", () => {
+        expect(() => {
+            Temporal.Now.plainTimeISO({});
+        }).toThrowWithMessage(TypeError, "getOffsetNanosecondsFor is undefined");
+    });
+});