test/parallel/test-cluster-worker-constructor.js

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'use strict';
// test-cluster-worker-constructor.js
// validates correct behavior of the cluster.Worker constructor

require('../common');
const assert = require('assert');
const cluster = require('cluster');
let worker;

worker = new cluster.Worker();
assert.strictEqual(worker.exitedAfterDisconnect, undefined);
assert.strictEqual(worker.state, 'none');
assert.strictEqual(worker.id, 0);
assert.strictEqual(worker.process, undefined);

worker = new cluster.Worker({
  id: 3,
  state: 'online',
  process: process
});
assert.strictEqual(worker.exitedAfterDisconnect, undefined);
assert.strictEqual(worker.state, 'online');
assert.strictEqual(worker.id, 3);
assert.strictEqual(worker.process, process);

worker = cluster.Worker.call({}, { id: 5 });
assert(worker instanceof cluster.Worker);
assert.strictEqual(worker.id, 5);