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.ownKeys.js

@@ -0,0 +1,50 @@
+test("length is 1", () => {
+    expect(Reflect.ownKeys).toHaveLength(1);
+});
+
+describe("errors", () => {
+    test("target must be an object", () => {
+        [null, undefined, "foo", 123, NaN, Infinity].forEach(value => {
+            expect(() => {
+                Reflect.ownKeys(value);
+            }).toThrowWithMessage(TypeError, `${value} is not an object`);
+        });
+    });
+});
+
+describe("normal behavior", () => {
+    test("regular empty object has no own keys", () => {
+        var objectOwnKeys = Reflect.ownKeys({});
+        expect(objectOwnKeys instanceof Array).toBeTrue();
+        expect(objectOwnKeys).toHaveLength(0);
+    });
+
+    test("regular object with some properties has own keys", () => {
+        var symbol = Symbol("symbol");
+        var objectOwnKeys = Reflect.ownKeys({ foo: "bar", [symbol]: "qux", bar: "baz", 0: 42 });
+        expect(objectOwnKeys instanceof Array).toBeTrue();
+        expect(objectOwnKeys).toHaveLength(4);
+        expect(objectOwnKeys[0]).toBe("0");
+        expect(objectOwnKeys[1]).toBe("foo");
+        expect(objectOwnKeys[2]).toBe("bar");
+        expect(objectOwnKeys[3]).toBe(symbol);
+    });
+
+    test("empty array has only 'length' own key", () => {
+        var arrayOwnKeys = Reflect.ownKeys([]);
+        expect(arrayOwnKeys instanceof Array).toBeTrue();
+        expect(arrayOwnKeys).toHaveLength(1);
+        expect(arrayOwnKeys[0]).toBe("length");
+    });
+
+    test("array with some values has 'length' and indices own keys", () => {
+        var arrayOwnKeys = Reflect.ownKeys(["foo", [], 123, undefined]);
+        expect(arrayOwnKeys instanceof Array).toBeTrue();
+        expect(arrayOwnKeys).toHaveLength(5);
+        expect(arrayOwnKeys[0]).toBe("0");
+        expect(arrayOwnKeys[1]).toBe("1");
+        expect(arrayOwnKeys[2]).toBe("2");
+        expect(arrayOwnKeys[3]).toBe("3");
+        expect(arrayOwnKeys[4]).toBe("length");
+    });
+});