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LibJS: Add %TypedArray%.prototype.copyWithin
This fixes 44 test262 cases.
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3 changed files with 282 additions and 0 deletions
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const TYPED_ARRAYS = [
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Uint8Array,
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Uint8ClampedArray,
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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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const BIGINT_TYPED_ARRAYS = [BigUint64Array, BigInt64Array];
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test("length is 2", () => {
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TYPED_ARRAYS.forEach(T => {
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expect(T.prototype.copyWithin).toHaveLength(2);
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});
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BIGINT_TYPED_ARRAYS.forEach(T => {
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expect(T.prototype.copyWithin).toHaveLength(2);
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});
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});
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describe("normal behaviour", () => {
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test("Noop", () => {
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TYPED_ARRAYS.forEach(T => {
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const array = new T([1, 2]);
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expect(array.copyWithin(0, 0)).toEqual(array);
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expect(array).toEqual([1, 2]);
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});
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BIGINT_TYPED_ARRAYS.forEach(T => {
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const array = new T([1n, 2n]);
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expect(array.copyWithin(0, 0)).toEqual(array);
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expect(array).toEqual([1n, 2n]);
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});
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});
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test("basic behaviour", () => {
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TYPED_ARRAYS.forEach(T => {
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const array = new T([1, 2, 3]);
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expect(array.copyWithin(1, 2)).toEqual(array);
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expect(array).toEqual([1, 3, 3]);
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expect(array.copyWithin(2, 0)).toEqual(array);
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expect(array).toEqual([1, 3, 1]);
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});
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BIGINT_TYPED_ARRAYS.forEach(T => {
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const array = new T([1n, 2n, 3n]);
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expect(array.copyWithin(1, 2)).toEqual(array);
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expect(array).toEqual([1n, 3n, 3n]);
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expect(array.copyWithin(2, 0)).toEqual(array);
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expect(array).toEqual([1n, 3n, 1n]);
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});
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});
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test("start > target", () => {
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TYPED_ARRAYS.forEach(T => {
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const array = new T([1, 2, 3]);
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expect(array.copyWithin(0, 1)).toEqual(array);
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expect(array).toEqual([2, 3, 3]);
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});
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BIGINT_TYPED_ARRAYS.forEach(T => {
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const array = new T([1n, 2n, 3n]);
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expect(array.copyWithin(0, 1)).toEqual(array);
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expect(array).toEqual([2n, 3n, 3n]);
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});
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});
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test("overwriting behavior", () => {
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TYPED_ARRAYS.forEach(T => {
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const array = new T([1, 2, 3]);
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expect(array.copyWithin(1, 0)).toEqual(array);
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expect(array).toEqual([1, 1, 2]);
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});
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BIGINT_TYPED_ARRAYS.forEach(T => {
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const array = new T([1n, 2n, 3n]);
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expect(array.copyWithin(1, 0)).toEqual(array);
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expect(array).toEqual([1n, 1n, 2n]);
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});
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});
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test("specify end", () => {
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TYPED_ARRAYS.forEach(T => {
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const array = new T([1, 2, 3]);
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expect(array.copyWithin(2, 0, 1)).toEqual(array);
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expect(array).toEqual([1, 2, 1]);
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});
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BIGINT_TYPED_ARRAYS.forEach(T => {
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const array = new T([1n, 2n, 3n]);
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expect(array.copyWithin(2, 0, 1)).toEqual(array);
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expect(array).toEqual([1n, 2n, 1n]);
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});
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});
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});
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