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// Flags: --expose-internals
'use strict';
require('../common');
const assert = require('assert');
const { internalBinding } = require('internal/test/binding');
const { arrayBufferViewHasBuffer } = internalBinding('util');
const tests = [
{ length: 0, expectOnHeap: true },
{ length: 48, expectOnHeap: true },
{ length: 96, expectOnHeap: false },
{ length: 1024, expectOnHeap: false },
];
for (const { length, expectOnHeap } of tests) {
const arrays = [
new Uint8Array(length),
new Uint16Array(length / 2),
new Uint32Array(length / 4),
new Float32Array(length / 4),
new Float64Array(length / 8),
Buffer.alloc(length),
Buffer.allocUnsafeSlow(length)
// Buffer.allocUnsafe() is missing because it may use pooled allocations.
];
for (const array of arrays) {
const isOnHeap = !arrayBufferViewHasBuffer(array);
assert.strictEqual(isOnHeap, expectOnHeap,
`mismatch: ${isOnHeap} vs ${expectOnHeap} ` +
`for ${array.constructor.name}, length = ${length}`);
// Consistency check: Accessing .buffer should create it.
array.buffer;
assert(arrayBufferViewHasBuffer(array));
}
}