/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.commons.math3.random;

import org.junit.Assert;
import org.junit.Test;

public class Well19937cTest extends RandomGeneratorAbstractTest {

    @Override
    public RandomGenerator makeGenerator() {
        return new Well19937c(100);
    }

    @Test
    public void testReferenceCode() {
        int[] base = {
              740849862,  1202665156,  -199039369,  -259008301,  -291878969, -1164428990, -1565918811,   491009864,
            -1883086670,  1383450241,  1244617256,   689006653, -1576746370, -1307940314,  1421489086,  1742094000,
             -595495729,  1047766204,  1875773301, -1637793284,  1379017098,   262792705,   191880010,  -251000180,
            -1753047622,  -972355720,    90626881,  1644693418,  1503365577,   439653419,  1806361562,  1268823869
         };
        int[] init = new int[624];
        for (int i = 0; i < init.length; ++i) {
            init[i] = base[i % base.length] + i;
        }
        Well19937c mt = new Well19937c(init);
        int[] refInt = {
            2128528153,    327121884,    935445371,    -83026433,  -1041143083,   2084595880,  -1073535198,  -1678863790,   -523636021,  -1514837782,   -736786810,   1527711112,  -1051227939,    978703380,    410322163,   1727815703,
            -648426354,    636056441,   1954420292,     17754810,   -958628705,  -1091307602,   1793078738,  -1680336346,   1792171272,    941973796,  -2066152330,  -1248758068,  -1061211586,    262020189,   1276960217,   -233886784,
            1767509252,  -1811939255,   -406116097,   -742435920,  -1349799525,    240329556,   -332161345,   1488943143,   -332244280,   2093328957,    674753300,  -1930135556,    257111467,     63793650,  -1964335223,   1315849133,
            -797349146,   1372022250,  -1451892049,  -1325138957,   -870401239,  -1294317369,     91490879,    386205044,   -704074702,  -1230679067,   1513674392,   -262996240,   1196007314,   1398903796,    803719762,  -1750926831,
           -1268814180,   1233515404,   1498313934,   -970591257,    611113671,   -261632474,   1834097325,   1709440492,   -150396854,   2120561003,    -62645660,    479080234,   1535125050,   1823378695,  -1129289329,  -1095198399,
            2092564733,     78836308,   -692015409,   1647147229,  -1847922219,   1838279320,   -848333841,  -1375151778,    920238861,   1512628290,   -749439404,    288851918,   -427218675,    679640964,    425700808,  -2077624511,
           -1929434455,   -647176419,    650437190,  -1926749131,  -1564744729,    734494454,    108193743,    246246679,    810042628,   1952337771,   1089253730,  -1874275331,   1428419392,   -492969232,   1945270770,   -201265602,
            -755490251,   -624426214,   -699605715,   -113446478,    809091299,  -1521531511,   1136505389,   -523660964,    132928433,   1926559713,  -1485314325,   -508322506,     46307756,  -1627479740,   -589386406,  -1855555892,
             584299545,   1272841066,   -597242658,    925134545,   1102566453,   -753335037,     -9523218,  -1778632375,    568963646,    764338254,   1259944540,  -2000124642,   1307414525,   -151384482,    807294400,   1993749511,
             -15503094,   -709471492,   2104830082,   1387684315,  -1929056119,    224254668,   -733550950,   -889466978,  -1987783335,   -437144026,    995905753,  -1021386158,  -1096313388,  -1014152835,  -1303258241,   1201884788,
           -1845042397,   1421462511,    980805867,   2143771251,    481226968,   1790544569,    328448328,   1995857639,    -66668269,  -1411421267,   -222586606,    866950765,   -308713926,  -1048350893,    993222402,  -1139265642,
            -871837948,   1145571913,    381928580,     35386691,   1640961123,  -1192981020,    775971009,    594246635,   1603197812,   -575106766,   2023682000,  -1636301903,   -718093720,  -1666421635,  -2146115988,    320593570,
             287355418,    454400027,   1112753817,   1751196267,    782077910,  -1478447368,  -1007557264,   -862315517,  -2035355952,   2123515250,   -557641502,  -1789932035,    879640129,     44167603,    791148984,   1382939723,
           -2135684233,   1825489580,    937345485,  -1839983359,  -1536880111,  -1472578359,   1548052748,  -1471535862,    -14508727,   1509621398,  -2134967452,   -787485401,    815341660,   -327905128,   1028096737,    866906991,
           -1585990806,    859229080,    234806270,    998518056,  -1897890815,   -900923587,   1179856752,   1529572451,    620486106,   1119836556,   1661285564,   2097404633,  -1437490790,    265306115,   -984880135,   1326751968,
            1280043536,    680210701,    155786166,   1550973250,   -325781949,   -597789777,     -1939780,   1345275487,   1930450001,    941449704,    669301309,    693651713,   -990721514,    582968326,    976132553,  -1892942099,
           -1065070157,   -711990993,   -688974833,  -1026091683,   1115346827,  -1305730749,  -1733626381,   -364566696,    -21761572,    -37152746,   -262011730,   1302722752,  -1806313409,   -767072509,    764112137,   1671157377,
            1837645038,  -1021606421,  -1781898911,   -232127459,   -310742675,  -1818095744,  -1128320656,   -705565953,   -354445532,   -523172807,   -433877202,    131904485,    -64292316,    381829280,    229820263,   1797992622,
            1359665678,    978481451,   -885267130,  -1415988446,   -356533788,   -961419072,   1938703090,    708344111,    679299953,    744615129,   1328811158,   1257588574,    569216282,   -753296151,  -1519838713,   2016884452,
            1062684606,   1561736790,   2028643511,  -1353001615,    886376832,   1466953172,   1664783899,   1290079981,    -57483993,  -1176112430,   1634916316,   1976304475,   1374136869,   -648738039,   1058175869,   -909000745,
           -1526439218,    726626991,   2066596202,     64980943,    -26166577,   -885900005,  -1821546816,  -1103727665,    730606315,  -1324948459,   -696956940,  -1300869403,   1171578314,    797249074,  -1600611618,   1928247682,
             307164165,  -1482476232,  -1886179640,   1306433392,   1945271359,  -1272113751,  -1285984081,  -2057145549,    795047465,   1262569087,  -1239828121,   1426641636,   -786371495,   2120199316,   1273690652,     74457589,
           -1033394229,    338952565,     46122958,   1225741533,   2115308090,    678200841,  -1618264885,   -101162569,  -1628976330,  -1232839500,    468709044,   1876019116,     92723122,    233398255,   -554960844,     38494196,
            -406437278,   2083528643,  -1106878615,   -340722557,  -2123964932,    223183343,    108918116,  -1014629054,   -901344544,   -838896840,  -1908460517,  -1763508731,   -926890833,   1703791049,   -667755577,   1694418389,
             791641263,   1095689677,   1119202039,  -1419111438,  -2012259010,    188017439,  -1775110395,  -1971099661,  -1688113734,    131472813,   -776304959,   1511388884,   2080864872,  -1733824651,   1992147495,   1119828320,
            1065336924,  -1357606762,    462963503,   1180719494,   -202678962,   -892646595,    605869323,   1144255663,    878462678,  -1051371303,    872374876,    631322271,   -172600544,  -1552071375,  -1939570033,    151973117,
            1640861022,    310682640,     34192866,   2057773671,  -2004476027,  -1879238973,    582736114,    900581664,   -427390545,  -1232348528,   -535115984,   1321853054,     69386780,  -1729375922,   1418473715,   1022091451,
             496799289,    -80757405,  -1903543310,  -1128846846,      1703964,   1984450945,    856753858,   -812919184,    775486323,  -1376056193,    638628840,    314243536,   1030626207,    644050997,     73923896,    362270613,
             236584904,   1463240891,   -223614432,    435371594,   -751940030,   -124274553,  -1991092884,   1579624267,   1249632649,    157589625,   -345229739,   -366245207,  -1399995986,   1651729983,   1965074340,  -1108970305,
            1163690769,   1732013523,  -1461252895,    669755552,   -476503675,   -264578685,    -32813949,    288222188,    -25734262,    106040916,   1654395626,   -365148479,   2014455846,  -2040447994,   1351639280,   -919975757,
           -1970412139,    -47306532,    222377665,   -363434917,  -1091717516,   2090685531,  -1221091649,  -1729649190,  -1239406708,   1064945398,   -105437479,   -419675255,     74701669,    -12862899,   -498269844,   1566898997,
           -1872838355,   1596887574,    485902962,    469225597,   -881763553,   1307841032,  -1642872487,   1388543045,    379792876,   1095683384,    840780732,   1934378038,   1851278350,  -1359389423,    130868458,   -313448799,
            -663624816,   1031714153,   -608443411,   -205137499,  -1849464427,   1973593637,   1068741808,  -1420655961,   1188762305,    954044841,   -995454462,  -1818101092,  -1937201943,   -324541290,  -1520603933,    572873173,
            -554764496,   1051557081,  -1245136076,   -985349536,    329320398,   1787901464,    -37803304,  -1759310177,  -1463492617,  -1861729663,   1251768782,    256937091,   -779036948,  -2049893864,   1256022877,   1228075657,
           -1550195255,   -611319853,   1190797155,   2047604112,   -576077160,  -1532843331,  -1324899394,   -159729560,   -622525946,  -1080302767,   -236033484,   1895243903,   -410123689,  -1944154157,   -681781021,   1208453003,
             579595878,   1303914051,   -145607082,   -131567277,  -1917288455,    894217359,   -175688726,  -1585480723,    663691440,  -1140068263,   -641711178,   1596080008,    629197693,    976422358,  -1570451095,    525923776,
             895046136,   -504151767,   1602553020,  -1233054923,  -1798474837,  -1488857895,   1055782627,    261863143,   1879276655,    488240679,   1910982611,  -1919441259,    370435945,   1265230086,  -1293284428,  -1503576227,
            2076963035,  -1379628250,   1157098875,   1984461153,  -1947837397,   1705880124,   1453607404,  -1233649748,   1479943773,   -863878721,   -862415630,   -736723275,    940306358,  -1596000684,  -1174889953,   -615723892,
            -885006597,  -1796723178,   1844159055,   -188942309,   2107251811,  -1675486996,  -1009475178,   -859263556,   -431866963,     -9593673,  -1878920923,   -104853791,  -1535224994,    -69315537,    586690130,  -1292234796,
            1378749456,   -301873019,   -319297563,   1677205851,    292450579,  -1289441171,   1788113680,   1907606333,   1464711611,  -1372023606,  -1978832445,  -1772259768,   1949124464,   1818322887,  -1138036603,   1249727628,
           -1474866449,  -1868013169,  -1384567593,    717007936,    954189997,  -1900561040,    738470389,   -158973180,   1732860784,   1936031206,  -1133354740,  -1173166665,   1432976712,    852636081,   1732064691,  -1831788120,
            1273933579,    455403217,   1988395890,    106493468,    506092152,   -610530423,   1698053512,   1311747476,   1969503012,  -1887461759,   1613543073,    903200334,   -737865837,    325656800,  -1234001200,   1492148864,
            2009861533,   -368262605,   1091338541,   2076108119,   -961392337,   1835877112,    316250307,   -853333391,  -2125443777,    815363504,   -798707803,   -158146540,    690786114,   -530775684,   1203556940,   1611485582,
           -1661412270,    -53184506,   2126287444,   -232222229,   1559486057,    283532250,   1202760418,    932144172,   1082594656,   -570104011,    413509167,   -995027177,   -996477516,      -540544,   -745537167,   -712135469,
            -996294983,   -592787198,   1889840948,   1314628747,   -394266926,   -682316577,    456447239,   1728806063,   -396279614,    -43387643,   1915717013,   -861574144,  -1078710588,   -561401249,   1111464540,     63643984,
           -1693870413,   -968369980,  -1053148188,    708799038,   1883537988,    373371671,   -156410415,  -1596483236,  -1846890431,    888692915,  -1025632583,  -1666477591,   -343066267,  -2059058792,    641501628,  -1744347292,
            1648632991,   1743540146,   2020952406,    164014499,    990508262,   1706408228,  -1236471842,   -347116260,   1843634523,    827255665,    300519853,  -1265974830,   -547247177,   -583064554,  -1995437077,    689210107,
             -93151393,    835365056,   1706367315,  -1605902756,    200954895,    431093688,   -277573364,   -928486713,   -552221973,    145432789,   1128919795,   1675095586,   1930359882,   1215849501,  -1447770583,    657776490,
            1885869860,  -1629237204,   -868897479,  -1258169760,   1828140195,   -883850439,    463933909,   -347361158,   1478116648,    801176896,  -1501915899,   1017335748,  -1654508882,    123994786,   1588785290,    791166651,
           -1523108535,    340411166,   -496474762,  -1189711141,     -7392628,   2045171250,  -1245366209,    834787230,  -1346883181,   2034209454,    737043362,    898803323,   1983089087,  -1845404320,      9585188,  -1180608323,
            1665100606,   1949474222,   -211115008,   1151308295,  -2132174259,    913126312,  -2085061672,   1419864120,  -1134542954,    -53833957,   -246913211,    468382370,  -1759479323,   1136686211,   1307012488,  -2036299559,
           -1346099736,    314743106,  -1683101865,   -947151948,   -234529696,  -2103334293,   -279256894,     -1484257,  -1053953017,   1801205399,    941594454,   -874119215,   -672865187,    762284205,  -1494975451,    486607927,
            -898264389,  -1711861093,   -212572760,   2106484281,  -1610786470,   1352525590,   -837779586,   1568282001,   -593019125,  -1146260782,  -1595879979,   -640781858,   1107692311,   1547132709,  -1928385535,  -2057772805,
             634887038,    329772618,    942136006,   -864405576,    501883884,   1537141484,  -1180626836,   1123055420,   1090885851,    421662750,   2033111605,   1710917425,  -1118058244,     74321279,    257328195,  -1199940697,
             208625996,   -442341447,    808119183,   1166827075,   1177417517,  -1856155370,  -1464837036,    -60624923,  -1306220638,    -91104698,  -1434621430,    548899241,     37351476,   1478278431,  -1255061434,    248470035,
            -104642597,  -1865169521,   1418373655,  -1660810523,  -2129015436,    154612798,    276575732,   1930338442,    179503250,   -929294855,    -39452027,  -1377657544,   1442322193,   1137511318,   -432158653,   -984801987,
             743099148,  -1118893528,   -904123623,  -1273146363,  -1884800406,   -803169061,   1254123158,   -484252077,    317646844,    404246525,  -1230293916,   1121445742,    -19657507,    652967153,  -1055406692,   -468950719,
           -1493532921,  -1447624258,  -1369679689,  -1517000228,   -145853307,   1518006526,   1591195514,  -1475557146,   -909722097,   2103182976,   -406830579,  -2124025254,  -1804819507,  -1357512858,    567321869,    409048156,
             567805180,   1749009386,   1762759722,  -1770324077,   1271140844,    468219092,    955792405,   1911965665,   1876314424,   -718200715,  -1278883927,   1392281730,   -120519585,    851473793,    245054754,    -33369039,
            -284877584,   -479534880,   -212346563,   -122017521,  -1461429983,   1331007370,   1788621721,   1739036536,   1446350953,  -1985448033,    685528610,  -1386434659,   1368233993,   2021786790,   1596478397,  -1716635278,
           -2011083017,    171876097,   -311529197,    687812052,    377000657,  -1055547517,  -1499047842,  -1818434951,   -120863666,     33888043,  -1387509273,   -541540700,   1162597745,  -1331415338,   1931708792,   -850270000,
             663845594,   1536495943,   -322924971,  -1380272203,    261190298,   -204874428,  -2104974031,    883819928,    155808204,  -1454446035,   1323388464,  -1696505728,   1549800285,   1018150463,  -1327715703,  -1582480640,
            1013659809,  -1820360082,   1666498787,   1406120540,   -196541482,   1248470531,  -1250433281,    836375878,    177646854,  -1927020253,   2145878321,    689712096,   -596605921,    348283199,   1916993096,    481356808,
            -339687826,   1219340319,    718895887,  -2007521340,  -1859185806,   2042164737,    -58146784,    742449142,   1930754708,    780832111,    715056441,  -1393886151,     -8150527,   -599607443,   -537300865,  -1212516084
        };

        for (int i = 0; i < refInt.length; ++i) {
            Assert.assertEquals(refInt[i], mt.nextInt());
        }

    }

}