text: // Copyright (c) 2018, Ben Noordhuis <info@bnoordhuis.nl>
  //
  // Permission to use, copy, modify, and/or distribute this software for any
  // purpose with or without fee is hereby granted, provided that the above
  // copyright notice and this permission notice appear in all copies.
  //
  // THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  // WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  // MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  // ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  // WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  // ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  // OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  
  'use strict';
  
  var assert = require('assert');
  var heapdump = require('../');
  
  var ncalls = 0;
  heapdump.writeSnapshot('/does/not/exist', function(err) {
    assert(/heapdump write error ENOENT/.test(err.message));
    ncalls++;
  });
  assert(ncalls === 1);
  