dns-suite.js/test/packer.js

;(function () {
  'use strict';

  var fs = require('fs');
  var path = require('path');
  var dnsjs = require('../').DNSPacket;

  var dirname = path.join(__dirname, 'fixtures');
  var expected; // shim
  var onefile = process.argv[2];

  var json = JSON.parse(fs.readFileSync(onefile, 'utf8'));

  var ab = dnsjs.write(json);
  //console.log(ab);
  var ui8 = new Uint8Array(ab);
  //console.log(ui8);
  var bytecount = 0;
  var str = [].slice.call(ui8).map(function (i) {
    var h = i.toString(16);
    if (h.length < 2) {
      h = '0' + h;
    }
    return h;
  }).join('').match(/.{1,2}/g).join(' ').match(/.{1,47}/g).map(function (str) {
    var lead = bytecount.toString(16);
    bytecount += 10;

    while (lead.length < 8) {
      lead = '0' + lead;
    }

    return lead + ' ' + str;
  }).join('\n');
  var trail = ab.byteLength.toString(16);
  while (trail.length < 8) {
    trail = '0' + trail;
  }

  console.log('');
  console.log('DEBUG with hexdump: ');
  console.log('hexdump ' + onefile.replace(/\.[^\.]*$/, '.bin'));
  console.log('');
  console.log(str + '\n' + trail);
  console.log('');

}());