node/test/parallel/test-worker-environmentdata.js
James M Snell 802b3e7cf9
worker: add setEnvironmentData/getEnvironmentData
These APIs allow arbitrary, cloneable JavaScript values to be set and
passed to all new Worker instances spawned from the current context.
It is similar to `workerData` except that environment data is set
independently of the `new Worker()` constructor, and the the value is
passed automatically to all new Workers.

This is a *partial* fix of https://github.com/nodejs/node/issues/30992
but does not implement a complete fix.

Signed-off-by: James M Snell <jasnell@gmail.com>

PR-URL: https://github.com/nodejs/node/pull/37486
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
2021-03-15 07:40:26 -07:00

34 lines
902 B
JavaScript

'use strict';
require('../common');
const {
Worker,
getEnvironmentData,
setEnvironmentData,
threadId,
} = require('worker_threads');
const {
deepStrictEqual,
strictEqual,
} = require('assert');
if (!process.env.HAS_STARTED_WORKER) {
process.env.HAS_STARTED_WORKER = 1;
setEnvironmentData('foo', 'bar');
setEnvironmentData('hello', { value: 'world' });
setEnvironmentData(1, 2);
strictEqual(getEnvironmentData(1), 2);
setEnvironmentData(1); // Delete it, key won't show up in the worker.
new Worker(__filename);
setEnvironmentData('hello'); // Delete it. Has no impact on the worker.
} else {
strictEqual(getEnvironmentData('foo'), 'bar');
deepStrictEqual(getEnvironmentData('hello'), { value: 'world' });
strictEqual(getEnvironmentData(1), undefined);
// Recurse to make sure the environment data is inherited
if (threadId <= 2)
new Worker(__filename);
}