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// |reftest| shell-option(--enable-arraybuffer-resizable) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
'use strict';
// Copyright 2021 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-arraybuffer-length
description: >
Automatically ported from IterateTypedArray test
in V8's mjsunit test typedarray-resizablearraybuffer.js
features: [resizable-arraybuffer]
includes: [compareArray.js]
flags: [onlyStrict]
---*/
class MyUint8Array extends Uint8Array {
}
class MyFloat32Array extends Float32Array {
}
class MyBigInt64Array extends BigInt64Array {
}
const builtinCtors = [
Uint8Array,
Int8Array,
Uint16Array,
Int16Array,
Uint32Array,
Int32Array,
Float32Array,
Float64Array,
Uint8ClampedArray,
BigUint64Array,
BigInt64Array
];
const ctors = [
...builtinCtors,
MyUint8Array,
MyFloat32Array,
MyBigInt64Array
];
function CreateResizableArrayBuffer(byteLength, maxByteLength) {
return new ArrayBuffer(byteLength, { maxByteLength: maxByteLength });
}
function WriteToTypedArray(array, index, value) {
if (array instanceof BigInt64Array || array instanceof BigUint64Array) {
array[index] = BigInt(value);
} else {
array[index] = value;
}
}
const no_elements = 10;
const offset = 2;
function TestIteration(ta, expected) {
let values = [];
for (const value of ta) {
values.push(Number(value));
}
assert.compareArray(values, expected);
}
for (let ctor of ctors) {
const buffer_byte_length = no_elements * ctor.BYTES_PER_ELEMENT;
// We can use the same RAB for all the TAs below, since we won't modify it
// after writing the initial values.
const rab = CreateResizableArrayBuffer(buffer_byte_length, 2 * buffer_byte_length);
const byte_offset = offset * ctor.BYTES_PER_ELEMENT;
// Write some data into the array.
let ta_write = new ctor(rab);
for (let i = 0; i < no_elements; ++i) {
WriteToTypedArray(ta_write, i, i % 128);
}
// Create various different styles of TypedArrays with the RAB as the
// backing store and iterate them.
const ta = new ctor(rab, 0, 3);
TestIteration(ta, [
0,
1,
2
]);
const empty_ta = new ctor(rab, 0, 0);
TestIteration(empty_ta, []);
const ta_with_offset = new ctor(rab, byte_offset, 3);
TestIteration(ta_with_offset, [
2,
3,
4
]);
const empty_ta_with_offset = new ctor(rab, byte_offset, 0);
TestIteration(empty_ta_with_offset, []);
const length_tracking_ta = new ctor(rab);
{
let expected = [];
for (let i = 0; i < no_elements; ++i) {
expected.push(i % 128);
}
TestIteration(length_tracking_ta, expected);
}
const length_tracking_ta_with_offset = new ctor(rab, byte_offset);
{
let expected = [];
for (let i = offset; i < no_elements; ++i) {
expected.push(i % 128);
}
TestIteration(length_tracking_ta_with_offset, expected);
}
const empty_length_tracking_ta_with_offset = new ctor(rab, buffer_byte_length);
TestIteration(empty_length_tracking_ta_with_offset, []);
}
reportCompare(0, 0);
|
