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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 Destructuring test
in V8's mjsunit test typedarray-resizablearraybuffer.js
includes: [compareArray.js]
features: [resizable-arraybuffer]
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;
}
}
function Convert(item) {
if (typeof item == 'bigint') {
return Number(item);
}
return item;
}
function ToNumbers(array) {
let result = [];
for (let item of array) {
result.push(Convert(item));
}
return result;
}
for (let ctor of ctors) {
const rab = CreateResizableArrayBuffer(4 * ctor.BYTES_PER_ELEMENT, 8 * ctor.BYTES_PER_ELEMENT);
const fixedLength = new ctor(rab, 0, 4);
const fixedLengthWithOffset = new ctor(rab, 2 * ctor.BYTES_PER_ELEMENT, 2);
const lengthTracking = new ctor(rab, 0);
const lengthTrackingWithOffset = new ctor(rab, 2 * ctor.BYTES_PER_ELEMENT);
// Write some data into the array.
let ta_write = new ctor(rab);
for (let i = 0; i < 4; ++i) {
WriteToTypedArray(ta_write, i, i);
}
{
let [a, b, c, d, e] = fixedLength;
assert.compareArray(ToNumbers([
a,
b,
c,
d
]), [
0,
1,
2,
3
]);
assert.sameValue(e, undefined);
}
{
let [a, b, c] = fixedLengthWithOffset;
assert.compareArray(ToNumbers([
a,
b
]), [
2,
3
]);
assert.sameValue(c, undefined);
}
{
let [a, b, c, d, e] = lengthTracking;
assert.compareArray(ToNumbers([
a,
b,
c,
d
]), [
0,
1,
2,
3
]);
assert.sameValue(e, undefined);
}
{
let [a, b, c] = lengthTrackingWithOffset;
assert.compareArray(ToNumbers([
a,
b
]), [
2,
3
]);
assert.sameValue(c, undefined);
}
// Shrink so that fixed length TAs go out of bounds.
rab.resize(3 * ctor.BYTES_PER_ELEMENT);
assert.throws(TypeError, () => {
let [a, b, c] = fixedLength;
});
assert.throws(TypeError, () => {
let [a, b, c] = fixedLengthWithOffset;
});
{
let [a, b, c, d] = lengthTracking;
assert.compareArray(ToNumbers([
a,
b,
c
]), [
0,
1,
2
]);
assert.sameValue(d, undefined);
}
{
let [a, b] = lengthTrackingWithOffset;
assert.compareArray(ToNumbers([a]), [2]);
assert.sameValue(b, undefined);
}
// Shrink so that the TAs with offset go out of bounds.
rab.resize(1 * ctor.BYTES_PER_ELEMENT);
assert.throws(TypeError, () => {
let [a, b, c] = fixedLength;
});
assert.throws(TypeError, () => {
let [a, b, c] = fixedLengthWithOffset;
});
assert.throws(TypeError, () => {
let [a, b, c] = lengthTrackingWithOffset;
});
{
let [a, b] = lengthTracking;
assert.compareArray(ToNumbers([a]), [0]);
assert.sameValue(b, undefined);
}
// Shrink to 0.
rab.resize(0);
assert.throws(TypeError, () => {
let [a, b, c] = fixedLength;
});
assert.throws(TypeError, () => {
let [a, b, c] = fixedLengthWithOffset;
});
assert.throws(TypeError, () => {
let [a, b, c] = lengthTrackingWithOffset;
});
{
let [a] = lengthTracking;
assert.sameValue(a, undefined);
}
// Grow so that all TAs are back in-bounds. The new memory is zeroed.
rab.resize(6 * ctor.BYTES_PER_ELEMENT);
{
let [a, b, c, d, e] = fixedLength;
assert.compareArray(ToNumbers([
a,
b,
c,
d
]), [
0,
0,
0,
0
]);
assert.sameValue(e, undefined);
}
{
let [a, b, c] = fixedLengthWithOffset;
assert.compareArray(ToNumbers([
a,
b
]), [
0,
0
]);
assert.sameValue(c, undefined);
}
{
let [a, b, c, d, e, f, g] = lengthTracking;
assert.compareArray(ToNumbers([
a,
b,
c,
d,
e,
f
]), [
0,
0,
0,
0,
0,
0
]);
assert.sameValue(g, undefined);
}
{
let [a, b, c, d, e] = lengthTrackingWithOffset;
assert.compareArray(ToNumbers([
a,
b,
c,
d
]), [
0,
0,
0,
0
]);
assert.sameValue(e, undefined);
}
}
reportCompare(0, 0);
|
