node/test/parallel/test-domain-exit-dispose.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.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// 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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'use strict';
require('../common');
const common = require('../common');
const assert = require('assert');
const domain = require('domain');

// no matter what happens, we should increment a 10 times.
let a = 0;
log();
function log() {
  console.log(a++, process.domain);
  if (a < 10) setTimeout(log, 20);
}

// in 50ms we'll throw an error.
setTimeout(err, 50);
function err() {
  const d = domain.create();
  d.on('error', handle);
  d.run(err2);

  function err2() {
    // this timeout should never be called, since the domain gets
    // disposed when the error happens.
    setTimeout(common.mustNotCall(), 1);

    // this function doesn't exist, and throws an error as a result.
    err3(); // eslint-disable-line no-undef
  }

  function handle(e) {
    // this should clean up everything properly.
    d.dispose();
    console.error(e);
    console.error('in handler', process.domain, process.domain === d);
  }
}

process.on('exit', function() {
  assert.strictEqual(a, 10);
  console.log('ok');
});