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

'use strict';
var cluster = require('cluster');
var assert = require('assert');
var net = require('net');

if (cluster.isMaster) {
  var worker = cluster.fork();
  assert.ok(!worker.isDead(),
            'isDead() should return false right after the worker has been ' +
            'created.');

  worker.on('exit', function() {
    assert.ok(!worker.isConnected(),
              'After an event has been emitted, ' +
              'isDead should return true');
  });

  worker.on('message', function(msg) {
    if (msg === 'readyToDie') {
      worker.kill();
    }
  });

} else if (cluster.isWorker) {
  assert.ok(!cluster.worker.isDead(),
            'isDead() should return false when called from within a worker');
  process.send('readyToDie');
}