LibJS: Add the Object.getOwnPropertySymbols method

Author: https://github.com/IdanHo
Commit: bd9e20ef79
Pull-request: https://github.com/SerenityOS/serenity/pull/8022
Reviewed-by: https://github.com/linusg

Userland/Libraries/LibJS/Tests/builtins/Object/Object.getOwnPropertySymbols.js

@@ -0,0 +1,16 @@
+test("use with array", () => {
+    let names = Object.getOwnPropertySymbols([1, 2, 3]);
+    console.log(names);
+    expect(names).toEqual([]);
+});
+
+test("use with object", () => {
+    let names = Object.getOwnPropertySymbols({ [Symbol.iterator]: 1, [Symbol.species]: 2 });
+    expect(names).toEqual([Symbol.iterator, Symbol.species]);
+});
+
+test("use with object with string keys", () => {
+    let symbol = Symbol("bar");
+    let names = Object.getOwnPropertySymbols({ foo: 1, [symbol]: 2, baz: 3 });
+    expect(names).toEqual([symbol]);
+});