node/test/parallel/test-buffer-sharedarraybuffer.js
cjihrig 680a171efa
test: define SharedArrayBuffer as a known global
This commit defines SharedArrayBuffer as a global for all tests,
rather than adding comments to individual tests.

PR-URL: https://github.com/nodejs/node/pull/20849
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Yuta Hiroto <hello@hiroppy.me>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
2018-05-22 00:42:40 +02:00

28 lines
622 B
JavaScript

'use strict';
require('../common');
const assert = require('assert');
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);
arr1[1] = 6000;
arr2[1] = 6000;
assert.deepStrictEqual(arr_buf, ar_buf);
// Checks for calling Buffer.byteLength on a SharedArrayBuffer.
assert.strictEqual(Buffer.byteLength(sab), sab.byteLength);
Buffer.from({ buffer: sab }); // Should not throw.