LibJS: Use a custom property_name_to_value method instead of to_value

Author: https://github.com/davidot
Commit: ce59e49e27
Pull-request: https://github.com/SerenityOS/serenity/pull/8294
Reviewed-by: https://github.com/IdanHo
Reviewed-by: https://github.com/linusg ✅

Userland/Libraries/LibJS/Tests/builtins/Proxy/Proxy.handler-defineProperty.js

@@ -27,6 +27,25 @@ describe("[[DefineProperty]] trap normal behavior", () => {
         Object.defineProperty(p, "foo", { configurable: true, writable: true, value: 10 });
     });
 
+    test("correct arguments passed to trap even for number", () => {
+        let o = {};
+        p = new Proxy(o, {
+            defineProperty(target, name, descriptor) {
+                expect(target).toBe(o);
+                expect(name).toBe("1");
+                expect(descriptor.configurable).toBeTrue();
+                expect(descriptor.enumerable).toBeUndefined();
+                expect(descriptor.writable).toBeTrue();
+                expect(descriptor.value).toBe(10);
+                expect(descriptor.get).toBeUndefined();
+                expect(descriptor.set).toBeUndefined();
+                return true;
+            },
+        });
+
+        Object.defineProperty(p, 1, { configurable: true, writable: true, value: 10 });
+    });
+
     test("optionally ignoring the define call", () => {
         let o = {};
         let p = new Proxy(o, {