test/parallel/test-worker-cleanexit-with-js.js

'use strict';
const common = require('../common');

// Harden the thread interactions on the exit path.
// Ensure workers are able to bail out safe at
// arbitrary execution points. By running a lot of
// JS code in a tight loop, the expectation
// is that those will be at various control flow points
// preferably in the JS land.

const { Worker } = require('worker_threads');
const code = 'setInterval(() => {' +
      "require('v8').deserialize(require('v8').serialize({ foo: 'bar' }));" +
      "require('vm').runInThisContext('x = \"foo\";');" +
      "eval('const y = \"vm\";');}, 10);";
for (let i = 0; i < 9; i++) {
  new Worker(code, { eval: true });
}
new Worker(code, { eval: true }).on('online', common.mustCall((msg) => {
  process.exit(0);
}));