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LibJS: Add %TypedArray%.prototype.subarray

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Idan Horowitz 2021-07-09 17:17:10 +03:00 • committed by Linus Groh
parent ff052a3241
commit f98a98506f
4 changed files with 103 additions and 0 deletions
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45
Userland/Libraries/LibJS/Tests/builtins/TypedArray/TypedArray.prototype.subarray.js Normal file
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const TYPED_ARRAYS = [
Uint8Array,
Uint8ClampedArray,
Uint16Array,
Uint32Array,
Int8Array,
Int16Array,
Int32Array,
Float32Array,
Float64Array,
];
const BIGINT_TYPED_ARRAYS = [BigUint64Array, BigInt64Array];
test("basic functionality", () => {
TYPED_ARRAYS.forEach(T => {
expect(T.prototype.subarray).toHaveLength(2);
const typedArray = new T(3);
typedArray[0] = 1;
typedArray[1] = 2;
typedArray[2] = 3;
const subarray = typedArray.subarray(1, 2);
expect(subarray).toHaveLength(1);
expect(subarray[0]).toBe(2);
subarray[0] = 4;
expect(typedArray[1]).toBe(4);
});
BIGINT_TYPED_ARRAYS.forEach(T => {
expect(T.prototype.subarray).toHaveLength(2);
const typedArray = new T(3);
typedArray[0] = 1n;
typedArray[1] = 2n;
typedArray[2] = 3n;
const subarray = typedArray.subarray(1, 2);
expect(subarray).toHaveLength(1);
expect(subarray[0]).toBe(2n);
subarray[0] = 4n;
expect(typedArray[1]).toBe(4n);
});
});