nodejs/test/parallel/test-buffer-sharedarraybuffer.js

/*global SharedArrayBuffer*/
'use strict';
// Flags: --harmony-sharedarraybuffer

require('../common');
const assert = require('assert');
const Buffer = require('buffer').Buffer;

const sab = new SharedArrayBuffer(24);
const arr1 = new Uint16Array(sab);
const arr2 = new Uint16Array(12);
arr2[0] = 5000;
arr1[0] = 5000;
arr1[1] = 4000;
arr2[1] = 4000;

const arr_buf = Buffer.from(arr1.buffer);
const ar_buf = Buffer.from(arr2.buffer);

assert.deepStrictEqual(arr_buf, ar_buf, 0);

arr1[1] = 6000;
arr2[1] = 6000;

assert.deepStrictEqual(arr_buf, ar_buf, 0);

// Checks for calling Buffer.byteLength on a SharedArrayBuffer

assert.strictEqual(Buffer.byteLength(sab), sab.byteLength, 0);

assert.doesNotThrow(() => Buffer.from({buffer: sab}));