csrc/node-v0.10.24/test/simple/test-child-process-fork-close.js

// Copyright Joyent, Inc. and other Node contributors.
//
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// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
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// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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var assert = require('assert'),
    common = require('../common'),
    fork = require('child_process').fork,
    fork = require('child_process').fork;

var cp = fork(common.fixturesDir + '/child-process-message-and-exit.js');

var gotMessage = false,
    gotExit = false,
    gotClose = false;

cp.on('message', function(message) {
  assert(!gotMessage);
  assert(!gotClose);
  assert.strictEqual(message, 'hello');
  gotMessage = true;
});

cp.on('exit', function() {
  assert(!gotExit);
  assert(!gotClose);
  gotExit = true;
});

cp.on('close', function() {
  assert(gotMessage);
  assert(gotExit);
  assert(!gotClose);
  gotClose = true;
});

process.on('exit', function() {
  assert(gotMessage);
  assert(gotExit);
  assert(gotClose);
});