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.defineProperty.js

@@ -0,0 +1,79 @@
+test("length is 3", () => {
+    expect(Reflect.defineProperty).toHaveLength(3);
+});
+
+describe("errors", () => {
+    test("target must be an object", () => {
+        [null, undefined, "foo", 123, NaN, Infinity].forEach(value => {
+            expect(() => {
+                Reflect.defineProperty(value);
+            }).toThrowWithMessage(TypeError, `${value} is not an object`);
+        });
+    });
+
+    test("descriptor must be an object", () => {
+        [null, undefined, "foo", 123, NaN, Infinity].forEach(value => {
+            expect(() => {
+                Reflect.defineProperty({}, "foo", value);
+            }).toThrowWithMessage(TypeError, `${value} is not an object`);
+        });
+    });
+});
+
+describe("normal behavior", () => {
+    test("initial value and non-writable", () => {
+        var o = {};
+
+        expect(o.foo).toBeUndefined();
+        expect(Reflect.defineProperty(o, "foo", { value: 1, writable: false })).toBeTrue();
+        expect(o.foo).toBe(1);
+        o.foo = 2;
+        expect(o.foo).toBe(1);
+    });
+
+    test("initial value and writable", () => {
+        var o = {};
+
+        expect(o.foo).toBeUndefined();
+        expect(Reflect.defineProperty(o, "foo", { value: 1, writable: true })).toBeTrue();
+        expect(o.foo).toBe(1);
+        o.foo = 2;
+        expect(o.foo).toBe(2);
+    });
+
+    test("can redefine value of configurable, writable property", () => {
+        var o = {};
+
+        expect(o.foo).toBeUndefined();
+        expect(
+            Reflect.defineProperty(o, "foo", { value: 1, configurable: true, writable: true })
+        ).toBeTrue();
+        expect(o.foo).toBe(1);
+        expect(Reflect.defineProperty(o, "foo", { value: 2 })).toBeTrue();
+        expect(o.foo).toBe(2);
+    });
+
+    test("can redefine value of configurable, non-writable property", () => {
+        var o = {};
+
+        expect(o.foo).toBeUndefined();
+        expect(
+            Reflect.defineProperty(o, "foo", { value: 1, configurable: true, writable: false })
+        ).toBeTrue();
+        expect(o.foo).toBe(1);
+        expect(Reflect.defineProperty(o, "foo", { value: 2 })).toBeTrue();
+        expect(o.foo).toBe(2);
+    });
+
+    test("cannot redefine value of non-configurable, non-writable property", () => {
+        var o = {};
+
+        expect(o.foo).toBeUndefined();
+        expect(
+            Reflect.defineProperty(o, "foo", { value: 1, configurable: false, writable: false })
+        ).toBeTrue();
+        expect(o.foo).toBe(1);
+        expect(Reflect.defineProperty(o, "foo", { value: 2 })).toBeFalse();
+        expect(o.foo).toBe(1);
+    });
+});