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LibJS: Add %TypedArray%.prototype.copyWithin

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This fixes 44 test262 cases.
This commit is contained in:
Luke 2021-07-08 03:39:16 +01:00 • committed by Linus Groh
parent 1b4138e687
commit c7a839bb24
3 changed files with 282 additions and 0 deletions
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101
Userland/Libraries/LibJS/Tests/builtins/TypedArray/TypedArray.prototype.copyWithin.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("length is 2", () => {
TYPED_ARRAYS.forEach(T => {
expect(T.prototype.copyWithin).toHaveLength(2);
});
BIGINT_TYPED_ARRAYS.forEach(T => {
expect(T.prototype.copyWithin).toHaveLength(2);
});
});
describe("normal behaviour", () => {
test("Noop", () => {
TYPED_ARRAYS.forEach(T => {
const array = new T([1, 2]);
expect(array.copyWithin(0, 0)).toEqual(array);
expect(array).toEqual([1, 2]);
});
BIGINT_TYPED_ARRAYS.forEach(T => {
const array = new T([1n, 2n]);
expect(array.copyWithin(0, 0)).toEqual(array);
expect(array).toEqual([1n, 2n]);
});
});
test("basic behaviour", () => {
TYPED_ARRAYS.forEach(T => {
const array = new T([1, 2, 3]);
expect(array.copyWithin(1, 2)).toEqual(array);
expect(array).toEqual([1, 3, 3]);
expect(array.copyWithin(2, 0)).toEqual(array);
expect(array).toEqual([1, 3, 1]);
});
BIGINT_TYPED_ARRAYS.forEach(T => {
const array = new T([1n, 2n, 3n]);
expect(array.copyWithin(1, 2)).toEqual(array);
expect(array).toEqual([1n, 3n, 3n]);
expect(array.copyWithin(2, 0)).toEqual(array);
expect(array).toEqual([1n, 3n, 1n]);
});
});
test("start > target", () => {
TYPED_ARRAYS.forEach(T => {
const array = new T([1, 2, 3]);
expect(array.copyWithin(0, 1)).toEqual(array);
expect(array).toEqual([2, 3, 3]);
});
BIGINT_TYPED_ARRAYS.forEach(T => {
const array = new T([1n, 2n, 3n]);
expect(array.copyWithin(0, 1)).toEqual(array);
expect(array).toEqual([2n, 3n, 3n]);
});
});
test("overwriting behavior", () => {
TYPED_ARRAYS.forEach(T => {
const array = new T([1, 2, 3]);
expect(array.copyWithin(1, 0)).toEqual(array);
expect(array).toEqual([1, 1, 2]);
});
BIGINT_TYPED_ARRAYS.forEach(T => {
const array = new T([1n, 2n, 3n]);
expect(array.copyWithin(1, 0)).toEqual(array);
expect(array).toEqual([1n, 1n, 2n]);
});
});
test("specify end", () => {
TYPED_ARRAYS.forEach(T => {
const array = new T([1, 2, 3]);
expect(array.copyWithin(2, 0, 1)).toEqual(array);
expect(array).toEqual([1, 2, 1]);
});
BIGINT_TYPED_ARRAYS.forEach(T => {
const array = new T([1n, 2n, 3n]);
expect(array.copyWithin(2, 0, 1)).toEqual(array);
expect(array).toEqual([1n, 2n, 1n]);
});
});
});