test/parallel/test-http-createConnection.js

// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// 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,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// 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,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// USE OR OTHER DEALINGS IN THE SOFTWARE.

'use strict';
const common = require('../common');
const http = require('http');
const net = require('net');
const assert = require('assert');

function commonHttpGet(fn) {
  if (typeof fn === 'function') {
    fn = common.mustCall(fn);
  }
  return new Promise((resolve, reject) => {
    http.get({ createConnection: fn }, (res) => {
      resolve(res);
    }).on('error', (err) => {
      reject(err);
    });
  });
}

const server = http.createServer(common.mustCall(function(req, res) {
  res.end();
}, 4)).listen(0, '127.0.0.1', async () => {
  await commonHttpGet(createConnection);
  await commonHttpGet(createConnectionAsync);
  await commonHttpGet(createConnectionBoth1);
  await commonHttpGet(createConnectionBoth2);

  // Errors
  await assert.rejects(() => commonHttpGet(createConnectionError), {
    message: 'sync'
  });
  await assert.rejects(() => commonHttpGet(createConnectionAsyncError), {
    message: 'async'
  });

  server.close();
});

function createConnection() {
  return net.createConnection(server.address().port, '127.0.0.1');
}

function createConnectionAsync(options, cb) {
  setImmediate(function() {
    cb(null, net.createConnection(server.address().port, '127.0.0.1'));
  });
}

function createConnectionBoth1(options, cb) {
  const socket = net.createConnection(server.address().port, '127.0.0.1');
  setImmediate(function() {
    cb(null, socket);
  });
  return socket;
}

function createConnectionBoth2(options, cb) {
  const socket = net.createConnection(server.address().port, '127.0.0.1');
  cb(null, socket);
  return socket;
}

function createConnectionError(options, cb) {
  throw new Error('sync');
}

function createConnectionAsyncError(options, cb) {
  process.nextTick(cb, new Error('async'));
}