nodejs/test/parallel/test-worker-parent-port-ref.js

25 lines
773 B
JavaScript

'use strict';
const common = require('../common');
const assert = require('assert');
const { isMainThread, parentPort, Worker } = require('worker_threads');
// This test makes sure that we manipulate the references of
// `parentPort` correctly so that any worker threads will
// automatically exit when there are no any other references.
{
if (isMainThread) {
const worker = new Worker(__filename);
worker.on('exit', common.mustCall((code) => {
assert.strictEqual(code, 0);
}), 1);
worker.on('online', common.mustCall());
} else {
const messageCallback = () => {};
parentPort.on('message', messageCallback);
// The thread won't exit if we don't make the 'message' listener off.
parentPort.off('message', messageCallback);
}
}