if (!this.uuid) {

// node.js
uuid = require('../uuid');
if (!/_rb/.test(uuid._rng.toString())) {
  throw new Error("should use crypto for node.js");
}

}

// // x-platform log/assert shims //

function _log(msg, type) {

type = type || 'log';

if (typeof(document) != 'undefined') {
  document.write('<div class="' + type + '">' + msg.replace(/\n/g, '<br />') + '</div>');
}
if (typeof(console) != 'undefined') {
  var color = {
    log: '\033[39m',
    warn: '\033[33m',
    error: '\033[31m'
  };
  console[type](color[type] + msg + color.log);
}

}

function log(msg) {_log(msg, 'log');} function warn(msg) {_log(msg, 'warn');} function error(msg) {_log(msg, 'error');}

function assert(res, msg) {

if (!res) {
  error('FAIL: ' + msg);
} else {
  log('Pass: ' + msg);
}

}

// // Unit tests //

// Verify ordering of v1 ids created with explicit times var TIME = 1321644961388; // 2011-11-18 11:36:01.388-08:00

function compare(name, ids) {

ids = ids.map(function(id) {
  return id.split('-').reverse().join('-');
}).sort();
var sorted = ([].concat(ids)).sort();

assert(sorted.toString() == ids.toString(), name + ' have expected order');

}

// Verify ordering of v1 ids created using default behavior compare('uuids with current time', [

uuid.v1(),
uuid.v1(),
uuid.v1(),
uuid.v1(),
uuid.v1()

]);

// Verify ordering of v1 ids created with explicit times compare('uuids with time option', [

uuid.v1({msecs: TIME - 10*3600*1000}),
uuid.v1({msecs: TIME - 1}),
uuid.v1({msecs: TIME}),
uuid.v1({msecs: TIME + 1}),
uuid.v1({msecs: TIME + 28*24*3600*1000})

]);

assert(

uuid.v1({msecs: TIME}) != uuid.v1({msecs: TIME}),
'IDs created at same msec are different'

);

// Verify throw if too many ids created var thrown = false; try {

uuid.v1({msecs: TIME, nsecs: 10000});

} catch (e) {

thrown = true;

} assert(thrown, 'Exception thrown when > 10K ids created in 1 ms');

// Verify clock regression bumps clockseq var uidt = uuid.v1({msecs: TIME}); var uidtb = uuid.v1({msecs: TIME - 1}); assert(

parseInt(uidtb.split('-')[3], 16) - parseInt(uidt.split('-')[3], 16) === 1,
'Clock regression by msec increments the clockseq'

);

// Verify clock regression bumps clockseq var uidtn = uuid.v1({msecs: TIME, nsecs: 10}); var uidtnb = uuid.v1({msecs: TIME, nsecs: 9}); assert(

parseInt(uidtnb.split('-')[3], 16) - parseInt(uidtn.split('-')[3], 16) === 1,
'Clock regression by nsec increments the clockseq'

);

// Verify explicit options produce expected id var id = uuid.v1({

msecs: 1321651533573,
nsecs: 5432,
clockseq: 0x385c,
node: [ 0x61, 0xcd, 0x3c, 0xbb, 0x32, 0x10 ]

}); assert(id == 'd9428888-122b-11e1-b85c-61cd3cbb3210', 'Explicit options produce expected id');

// Verify adjacent ids across a msec boundary are 1 time unit apart var u0 = uuid.v1({msecs: TIME, nsecs: 9999}); var u1 = uuid.v1({msecs: TIME + 1, nsecs: 0});

var before = u0.split(‘-’), after = u1.split(‘-’); var dt = parseInt(after, 16) - parseInt(before, 16); assert(dt === 1, 'Ids spanning 1ms boundary are 100ns apart');

// // Test parse/unparse //

id = '00112233445566778899aabbccddeeff'; assert(uuid.unparse(uuid.parse(id.substr(0,10))) ==

'00112233-4400-0000-0000-000000000000', 'Short parse');

assert(uuid.unparse(uuid.parse('(this is the uuid -> ' + id + id)) ==

'00112233-4455-6677-8899-aabbccddeeff', 'Dirty parse');

// // Perf tests //

var generators = {

v1: uuid.v1,
v4: uuid.v4

};

var UUID_FORMAT = {

v1: /[0-9a-f]{8}-[0-9a-f]{4}-1[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}/i,
v4: /[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}/i

};

var N = 1e4;

// Get %'age an actual value differs from the ideal value function divergence(actual, ideal) {

return Math.round(100*100*(actual - ideal)/ideal)/100;

}

function rate(msg, t) {

log(msg + ': ' + (N / (Date.now() - t) * 1e3 | 0) + ' uuids\/second');

}

for (var version in generators) {

var counts = {}, max = 0;
var generator = generators[version];
var format = UUID_FORMAT[version];

log('\nSanity check ' + N + ' ' + version + ' uuids');
for (var i = 0, ok = 0; i < N; i++) {
  id = generator();
  if (!format.test(id)) {
    throw Error(id + ' is not a valid UUID string');
  }

  if (id != uuid.unparse(uuid.parse(id))) {
    assert(fail, id + ' is not a valid id');
  }

  // Count digits for our randomness check
  if (version == 'v4') {
    var digits = id.replace(/-/g, '').split('');
    for (var j = digits.length-1; j >= 0; j--) {
      var c = digits[j];
      max = Math.max(max, counts[c] = (counts[c] || 0) + 1);
    }
  }
}

// Check randomness for v4 UUIDs
if (version == 'v4') {
  // Limit that we get worried about randomness. (Purely empirical choice, this!)
  var limit = 2*100*Math.sqrt(1/N);

  log('\nChecking v4 randomness.  Distribution of Hex Digits (% deviation from ideal)');

  for (var i = 0; i < 16; i++) {
    var c = i.toString(16);
    var bar = '', n = counts[c], p = Math.round(n/max*100|0);

    // 1-3,5-8, and D-F: 1:16 odds over 30 digits
    var ideal = N*30/16;
    if (i == 4) {
      // 4: 1:1 odds on 1 digit, plus 1:16 odds on 30 digits
      ideal = N*(1 + 30/16);
    } else if (i >= 8 && i <= 11) {
      // 8-B: 1:4 odds on 1 digit, plus 1:16 odds on 30 digits
      ideal = N*(1/4 + 30/16);
    } else {
      // Otherwise: 1:16 odds on 30 digits
      ideal = N*30/16;
    }
    var d = divergence(n, ideal);

    // Draw bar using UTF squares (just for grins)
    var s = n/max*50 | 0;
    while (s--) bar += '=';

    assert(Math.abs(d) < limit, c + ' |' + bar + '| ' + counts[c] + ' (' + d + '% < ' + limit + '%)');
  }
}

}

// Perf tests for (var version in generators) {

log('\nPerformance testing ' + version + ' UUIDs');
var generator = generators[version];
var buf = new uuid.BufferClass(16);

for (var i = 0, t = Date.now(); i < N; i++) generator();
rate('uuid.' + version + '()', t);

for (var i = 0, t = Date.now(); i < N; i++) generator('binary');
rate('uuid.' + version + '(\'binary\')', t);

for (var i = 0, t = Date.now(); i < N; i++) generator('binary', buf);
rate('uuid.' + version + '(\'binary\', buffer)', t);

}