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LibJS: Implement missing conditional when creating a TypedArray subarray

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Timothy Flynn 2023-12-27 14:18:06 -05:00 • committed by Tim Flynn
parent 522302d5d6
commit f1e01a681e
2 changed files with 19 additions and 1 deletions
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18
Userland/Libraries/LibJS/Tests/builtins/TypedArray/TypedArray.prototype.subarray.js
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@ -57,3 +57,21 @@ test("resizable ArrayBuffer", () => {
expect(typedArray.subarray(0, 1).byteLength).toBe(0);
});
});
test("resizable ArrayBuffer resized during `start` parameter access", () => {
TYPED_ARRAYS.forEach(T => {
let arrayBuffer = new ArrayBuffer(T.BYTES_PER_ELEMENT * 2, {
maxByteLength: T.BYTES_PER_ELEMENT * 4,
});
let badAccessor = {
valueOf: () => {
arrayBuffer.resize(T.BYTES_PER_ELEMENT * 4);
return 0;
},
};
let typedArray = new T(arrayBuffer);
expect(typedArray.subarray(badAccessor, typedArray.length).length).toBe(2);
});
});