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/Reflect/Reflect.getOwnPropertyDescriptor.js

@@ -0,0 +1,38 @@
+test("length is 2", () => {
+    expect(Reflect.getOwnPropertyDescriptor).toHaveLength(2);
+});
+
+describe("errors", () => {
+    test("target must be an object", () => {
+        [null, undefined, "foo", 123, NaN, Infinity].forEach(value => {
+            expect(() => {
+                Reflect.getOwnPropertyDescriptor(value);
+            }).toThrowWithMessage(TypeError, `${value} is not an object`);
+        });
+    });
+});
+
+describe("normal behavior", () => {
+    test("get descriptor of undefined object property", () => {
+        expect(Reflect.getOwnPropertyDescriptor({})).toBeUndefined();
+        expect(Reflect.getOwnPropertyDescriptor({}, "foo")).toBeUndefined();
+    });
+
+    test("get descriptor of defined object property", () => {
+        var o = { foo: "bar" };
+        var d = Reflect.getOwnPropertyDescriptor(o, "foo");
+        expect(d.value).toBe("bar");
+        expect(d.writable).toBeTrue();
+        expect(d.enumerable).toBeTrue();
+        expect(d.configurable).toBeTrue();
+    });
+
+    test("get descriptor of array length property", () => {
+        var a = [];
+        d = Reflect.getOwnPropertyDescriptor(a, "length");
+        expect(d.value).toBe(0);
+        expect(d.writable).toBeTrue();
+        expect(d.enumerable).toBeFalse();
+        expect(d.configurable).toBeFalse();
+    });
+});