nodejs/test/parallel/test-worker-onmessage.js

27 lines
844 B
JavaScript

'use strict';
const common = require('../common');
const assert = require('assert');
const { Worker, parentPort } = require('worker_threads');
// Do not use isMainThread so that this test itself can be run inside a Worker.
if (!process.env.HAS_STARTED_WORKER) {
process.env.HAS_STARTED_WORKER = 1;
const w = new Worker(__filename);
const expectation = [ 4, undefined, null ];
const actual = [];
w.on('message', common.mustCall((message) => {
actual.push(message);
if (actual.length === expectation.length) {
assert.deepStrictEqual(expectation, actual);
w.terminate();
}
}, expectation.length));
w.postMessage(2);
} else {
parentPort.onmessage = common.mustCall((message) => {
parentPort.postMessage(message.data * 2);
parentPort.postMessage(undefined);
parentPort.postMessage(null);
});
}