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LibJS: Expose TypedArray.prototype.byteOffset
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4 changed files with 43 additions and 4 deletions
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// Update when more typed arrays get added
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const TYPED_ARRAYS = [
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Uint8Array,
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Uint16Array,
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Uint32Array,
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Int8Array,
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Int16Array,
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Int32Array,
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Float32Array,
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Float64Array,
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];
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test("basic functionality", () => {
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TYPED_ARRAYS.forEach(T => {
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const typedArray = new T([1, 2, 3]);
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expect(Object.hasOwn(typedArray, "byteOffset")).toBeFalse();
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expect(typedArray.byteOffset).toBe(0);
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expect(typedArray.length).toBe(3);
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const buffer = typedArray.buffer;
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const arrayFromOffset = new T(buffer, T.BYTES_PER_ELEMENT);
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expect(arrayFromOffset.byteOffset).toBe(T.BYTES_PER_ELEMENT);
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expect(arrayFromOffset.length).toBe(2);
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expect(arrayFromOffset[0]).toBe(2);
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expect(arrayFromOffset[1]).toBe(3);
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});
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});
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