cc-luhn/test.js

Calculate or verify the credit card check digit (luhn)

'use strict';

const test = require('tape');
const luhn = require('./');

test(function( t ){
	const pans = [
		// from the ISO standard
		'6123451234567893',

		// http://www.paypalobjects.com/en_US/vhelp/paypalmanager_help/credit_card_numbers.htm
		'4012111111111111',
		'378282246310005',
		'371449635398431',
		'378734493671000',
		'5610591081018250',
		'30569309025904',
		'38520000023237',
		'6011111111111117',
		'6011000990139424',
		'3530111333300000',
		'3566002020360505',
		'5555555555554444',
		'5105105105105100',
		'4111111111111111',
		'4012888888881881',
		'4222222222222',
		'5019717010103742',
		'6331101999990016',
	];

	const invalid = [
		'76009244561',
		'4571736004738485',
	];

	pans.forEach(function( pan ){
		t.equal(luhn(true, pan), true, pan+' is valid');
		t.equal(luhn(pan.slice(0, -1)), pan.slice(-1));
	});

	invalid.forEach(function( pan ){
		t.equal(luhn(true, pan), false, pan+' is invalid');
	});

	t.end();
});