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/Object/Object.keys.js

@@ -0,0 +1,51 @@
+describe("correct behavior", () => {
+    test("length", () => {
+        expect(Object.keys).toHaveLength(1);
+        expect(Object.keys(true)).toHaveLength(0);
+        expect(Object.keys(45)).toHaveLength(0);
+        expect(Object.keys(-998)).toHaveLength(0);
+        expect(Object.keys("abcd")).toHaveLength(4);
+        expect(Object.keys([1, 2, 3])).toHaveLength(3);
+        expect(Object.keys({ a: 1, b: 2, c: 3 })).toHaveLength(3);
+    });
+
+    test("object argument", () => {
+        let keys = Object.keys({ foo: 1, bar: 2, baz: 3 });
+        expect(keys).toEqual(["foo", "bar", "baz"]);
+    });
+
+    test("object argument with symbol keys", () => {
+        let keys = Object.keys({ foo: 1, [Symbol("bar")]: 2, baz: 3 });
+        expect(keys).toEqual(["foo", "baz"]);
+    });
+
+    test("array argument", () => {
+        let keys = Object.keys(["a", "b", "c"]);
+        expect(keys).toEqual(["0", "1", "2"]);
+    });
+
+    test("ignores non-enumerable properties", () => {
+        let obj = { foo: 1 };
+        Object.defineProperty(obj, "getFoo", {
+            value: function () {
+                return this.foo;
+            },
+        });
+        keys = Object.keys(obj);
+        expect(keys).toEqual(["foo"]);
+    });
+});
+
+describe("errors", () => {
+    test("null argument value", () => {
+        expect(() => {
+            Object.keys(null);
+        }).toThrowWithMessage(TypeError, "ToObject on null or undefined");
+    });
+
+    test("undefined argument value", () => {
+        expect(() => {
+            Object.keys(undefined);
+        }).toThrowWithMessage(TypeError, "ToObject on null or undefined");
+    });
+});