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LibJS: Don't remove non-configurable items in Array when setting length

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davidot 2021-06-25 16:55:38 +02:00 • committed by Linus Groh
parent c7aaf40a35
commit b38fb418f8
2 changed files with 31 additions and 2 deletions
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10
Userland/Libraries/LibJS/Tests/builtins/Array/array-length-setter.js
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@ -44,4 +44,14 @@ describe("normal behavior", () => {
b.length = 0x80000001;
expect(b.length).toEqual(0x80000001);
});
test("should not remove non-configurable values", () => {
var a = [1, undefined, 3];
Object.defineProperty(a, 1, { configurable: false, value: 2 });
expect(a.length).toEqual(3);
expect((a.length = 1)).toEqual(1);
expect(a.length).toEqual(2);
expect(a[1]).toEqual(2);
});
});