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LibJS: Object.preventExtensions should allow property modfication

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Existing properties on a non-extensible object should be changable and
deletable.
This commit is contained in:
Matthew Olsson 2020-07-06 17:17:47 -07:00 • committed by Andreas Kling
parent bfbd6df892
commit 93ebd320ef
3 changed files with 39 additions and 17 deletions
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14
Libraries/LibJS/Tests/builtins/Object/Object.preventExtensions.js
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@ -24,6 +24,20 @@ describe("correct behavior", () => {
o.baz = "baz";
expect(o.baz).toBeUndefined();
});
test("modifying existing properties", () => {
const o = { foo: "bar" };
Object.preventExtensions(o);
o.foo = "baz";
expect(o.foo).toBe("baz");
});
test("deleting existing properties", () => {
const o = { foo: "bar" };
Object.preventExtensions(o);
delete o.foo;
expect(o).not.toHaveProperty("foo");
});
});
describe("errors", () => {