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serenity/Libraries/LibJS/Tests/builtins/ArrayBuffer/ArrayBuffer.isView.js
2020-12-02 23:49:00 +01:00

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JavaScript

// Update when more typed arrays get added
const TYPED_ARRAYS = [Uint8Array, Uint16Array, Uint32Array, Int8Array, Int16Array, Int32Array];
test("basic functionality", () => {
expect(ArrayBuffer.isView).toHaveLength(1);
expect(ArrayBuffer.isView()).toBeFalse();
expect(ArrayBuffer.isView(null)).toBeFalse();
expect(ArrayBuffer.isView(undefined)).toBeFalse();
expect(ArrayBuffer.isView([])).toBeFalse();
expect(ArrayBuffer.isView({})).toBeFalse();
expect(ArrayBuffer.isView(123)).toBeFalse();
expect(ArrayBuffer.isView("foo")).toBeFalse();
expect(ArrayBuffer.isView(new ArrayBuffer())).toBeFalse();
TYPED_ARRAYS.forEach(T => {
expect(ArrayBuffer.isView(new T())).toBeTrue();
});
});