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if (typeof(uuid) == 'undefined') {
uuid = require('../uuid');
}
var UUID_FORMAT = /[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-4[0-9a-fA-F]{3}-[89a-fAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}/;
var N = 1e5;
function log(msg) {
if (typeof(document) != 'undefined') {
document.write('<div>' + msg + '</div>');
}
if (typeof(console) != 'undefined') {
console.log(msg);
}
}
function rate(msg, t) {
log(msg + ': ' + (N / (Date.now() - t) * 1e3 | 0) + ' uuids/second');
}
// Perf tests
log('- - - Performance Data - - -');
for (var i = 0, t = Date.now(); i < N; i++) uuid();
rate('uuid()', t);
for (var i = 0, t = Date.now(); i < N; i++) uuid('binary');
rate('uuid(\'binary\')', t);
var buf = new uuid.BufferClass(16);
for (var i = 0, t = Date.now(); i < N; i++) uuid('binary', buf);
rate('uuid(\'binary\', buffer)', t);
var counts = {}, max = 0;
var b = new uuid.BufferClass(16);
for (var i = 0; i < N; i++) {
id = uuid();
if (!UUID_FORMAT.test(id)) {
throw Error(id + ' is not a valid UUID string');
}
if (id != uuid.unparse(uuid.parse(id))) {
throw Error(id + ' does not parse/unparse');
}
// Count digits for our randomness check
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);
}
}
// Get %'age an actual value differs from the ideal value
function divergence(actual, ideal) {
return Math.round(100*100*(actual - ideal)/ideal)/100;
}
log('<br />- - - Distribution of Hex Digits (% deviation from ideal) - - -');
// Check randomness
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 += '=';
log(c + ' |' + bar + '| ' + counts[c] + ' (' + d + '%)');
}
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