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.deleteProperty.js

@@ -0,0 +1,63 @@
+test("length is 2", () => {
+    expect(Reflect.deleteProperty).toHaveLength(2);
+});
+
+describe("errors", () => {
+    test("target must be an object", () => {
+        [null, undefined, "foo", 123, NaN, Infinity].forEach(value => {
+            expect(() => {
+                Reflect.deleteProperty(value);
+            }).toThrowWithMessage(TypeError, `${value} is not an object`);
+        });
+    });
+});
+
+describe("normal behavior", () => {
+    test("deleting non-existent property", () => {
+        expect(Reflect.deleteProperty({})).toBeTrue();
+        expect(Reflect.deleteProperty({}, "foo")).toBeTrue();
+    });
+
+    test("deleting existent property", () => {
+        var o = { foo: 1 };
+        expect(o.foo).toBe(1);
+        expect(Reflect.deleteProperty(o, "foo")).toBeTrue();
+        expect(o.foo).toBeUndefined();
+        expect(Reflect.deleteProperty(o, "foo")).toBeTrue();
+        expect(o.foo).toBeUndefined();
+    });
+
+    test("deleting existent, configurable, non-writable property", () => {
+        var o = {};
+        Object.defineProperty(o, "foo", { value: 1, configurable: true, writable: false });
+        expect(Reflect.deleteProperty(o, "foo")).toBeTrue();
+        expect(o.foo).toBeUndefined();
+    });
+
+    test("deleting existent, non-configurable, writable property", () => {
+        var o = {};
+        Object.defineProperty(o, "foo", { value: 1, configurable: false, writable: true });
+        expect(Reflect.deleteProperty(o, "foo")).toBeFalse();
+        expect(o.foo).toBe(1);
+    });
+
+    test("deleting existent, non-configurable, non-writable property", () => {
+        var o = {};
+        Object.defineProperty(o, "foo", { value: 1, configurable: false, writable: false });
+        expect(Reflect.deleteProperty(o, "foo")).toBeFalse();
+        expect(o.foo).toBe(1);
+    });
+
+    test("deleting array index", () => {
+        var a = [1, 2, 3];
+        expect(a).toHaveLength(3);
+        expect(a[0]).toBe(1);
+        expect(a[1]).toBe(2);
+        expect(a[2]).toBe(3);
+        expect(Reflect.deleteProperty(a, 1)).toBeTrue();
+        expect(a).toHaveLength(3);
+        expect(a[0]).toBe(1);
+        expect(a[1]).toBeUndefined();
+        expect(a[2]).toBe(3);
+    });
+});