mersennetwister/tests/MersenneTwister.spec.js

A standalone, pure JavaScript implementation of the Mersenne Twister pseudo random number generator. Compatible with Node.js, requirejs and browser environments.

require(['src/MersenneTwister'], function (MersenneTwister) {
    'use strict';

    describe('MersenneTwister', function () {
        it('generates the expected numbers', function () {
            // Expected values for a seed value of 1
            var expected = [
                1791095845, 4282876139, 3093770124, 4005303368, 491263,
                550290313, 1298508491, 4290846341, 630311759, 1013994432,
                396591248, 1703301249, 799981516, 1666063943, 1484172013,
                2876537340, 1704103302, 4018109721, 2314200242, 3634877716,
                1800426750, 1345499493, 2942995346, 2252917204, 878115723,
                1904615676, 3771485674, 986026652, 117628829, 2295290254,
                2879636018, 3925436996, 1792310487, 1963679703, 2399554537,
                1849836273, 602957303, 4033523166, 850839392, 3343156310,
                3439171725, 3075069929, 4158651785, 3447817223, 1346146623,
                398576445, 2973502998, 2225448249, 3764062721, 3715233664,
                3842306364, 3561158865, 365262088, 3563119320, 167739021,
                1172740723, 729416111, 254447594, 3771593337, 2879896008,
                422396446, 2547196999, 1808643459, 2884732358, 4114104213,
                1768615473, 2289927481, 848474627, 2971589572, 1243949848,
                1355129329, 610401323, 2948499020, 3364310042, 3584689972,
                1771840848, 78547565, 146764659, 3221845289, 2680188370,
                4247126031, 2837408832, 3213347012, 1282027545, 1204497775,
                1916133090, 3389928919, 954017671, 443352346, 315096729,
                1923688040, 2015364118, 3902387977, 413056707, 1261063143,
                3879945342, 1235985687, 513207677, 558468452, 2253996187,
                83180453, 359158073, 2915576403, 3937889446, 908935816,
                3910346016, 1140514210, 1283895050, 2111290647, 2509932175,
                229190383, 2430573655, 2465816345, 2636844999, 630194419,
                4108289372, 2531048010, 1120896190, 3005439278, 992203680,
                439523032, 2291143831, 1778356919, 4079953217, 2982425969,
                2117674829, 1778886403, 2321861504, 214548472, 3287733501,
                2301657549, 194758406, 2850976308, 601149909, 2211431878,
                3403347458, 4057003596, 127995867, 2519234709, 3792995019,
                3880081671, 2322667597, 590449352, 1924060235, 598187340,
                3831694379, 3467719188, 1621712414, 1708008996, 2312516455,
                710190855, 2801602349, 3983619012, 1551604281, 1493642992,
                2452463100, 3224713426, 2739486816, 3118137613, 542518282,
                3793770775, 2964406140, 2678651729, 2782062471, 3225273209,
                1520156824, 1498506954, 3278061020, 1159331476, 1531292064,
                3847801996, 3233201345, 1838637662, 3785334332, 4143956457,
                50118808, 2849459538, 2139362163, 2670162785, 316934274,
                492830188, 3379930844, 4078025319, 275167074, 1932357898,
                1526046390, 2484164448, 4045158889, 1752934226, 1631242710,
                1018023110, 3276716738, 3879985479, 3313975271, 2463934640,
                1294333494, 12327951, 3318889349, 2650617233, 656828586
            ];

            var mt = new MersenneTwister(1),
                i = 0;

            for (; i < expected.length; ++i) {
                expect(mt.int()).toBe(expected[i]);
            }
        });
    });
});