fix[deepFreeze]: freeze symbol and non-enumerable properties

src/object/deepFreeze.spec.ts

@@ -9,6 +9,13 @@
     expect(Object.isFrozen(obj.user)).toBe(true);
   });
 
+  it('should freeze objects stored in symbol properties', () => {
+    const key = Symbol('user');
+    const obj = deepFreeze({ [key]: { name: 'Alex' } });
+
+    expect(Object.isFrozen(obj[key])).toBe(true);
+  });
+
   it('should freeze nested arrays', () => {
     const obj = deepFreeze({ items: [1, 2, { nested: true }] });
 
@@ -39,7 +46,7 @@
   });
 
   it('should handle circular references', () => {
     const obj: Record<string, any> = { a: 1 };
     obj.self = obj;
 
     const frozen = deepFreeze(obj);
@@ -73,11 +80,11 @@
     const obj = deepFreeze({ user: { name: 'Alex', age: 20 } });
 
     expect(() => {
       (obj as any).user = {};
     }).toThrow();
 
     expect(() => {
       (obj as any).user.age = 22;
     }).toThrow();
   });
 });

src/object/deepFreeze.ts

@@ -21,7 +21,7 @@ export function deepFreeze<T>(obj: T): T {
 
   Object.freeze(obj);
 
-  const keys = Object.keys(obj) as Array<keyof T>;
+  const keys = Reflect.ownKeys(obj) as Array<keyof T>;
 
   for (let i = 0; i < keys.length; i++) {
     const value = obj[keys[i]];