node/test/simple/test-child-process-spawn-error.js

// Copyright Joyent, Inc. and other Node contributors.
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var fs = require('fs');
var spawn = require('child_process').spawn;
var assert = require('assert');

var errors = 0;

var enoentPath = 'foo123';
assert.equal(fs.existsSync(enoentPath), false);

var enoentChild = spawn(enoentPath);
enoentChild.on('error', function (err) {
  assert.equal(err.path, enoentPath);
  errors++;
});

process.on('exit', function() {
  assert.equal(1, errors);
});