text: // 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
  // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  // USE OR OTHER DEALINGS IN THE SOFTWARE.
  
  'use strict';
  const common = require('../common');
  if (!common.hasCrypto)
    common.skip('missing crypto');
  
  const fixtures = require('../common/fixtures');
  const assert = require('assert');
  const tls = require('tls');
  
  const options = { key: fixtures.readSync('test_key.pem'),
                    cert: fixtures.readSync('test_cert.pem'),
                    ca: [ fixtures.readSync('test_ca.pem') ] };
  
  const server = tls.createServer(options, onconnection);
  let gotChunk = false;
  let gotDrain = false;
  
  function onconnection(conn) {
    conn.on('data', function(c) {
      if (!gotChunk) {
        gotChunk = true;
        console.log('ok - got chunk');
      }
  
      // just some basic sanity checks.
      assert(c.length);
      assert(Buffer.isBuffer(c));
  
      if (gotDrain)
        process.exit(0);
    });
  }
  
  server.listen(0, function() {
    const chunk = Buffer.alloc(1024, 'x');
    const opt = { port: this.address().port, rejectUnauthorized: false };
    const conn = tls.connect(opt, function() {
      conn.on('drain', ondrain);
      write();
    });
    function ondrain() {
      if (!gotDrain) {
        gotDrain = true;
        console.log('ok - got drain');
      }
      if (gotChunk)
        process.exit(0);
      write();
    }
    function write() {
      // this needs to return false eventually
      while (false !== conn.write(chunk));
    }
  });
  