src/test/uint256_tests.cpp

   1 // Copyright (c) 2011-2016 The Bitcoin Core developers
   2 // Distributed under the MIT software license, see the accompanying
   3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
   4 #include "arith_uint256.h"
   5 #include "uint256.h"
   6 #include "version.h"
   7 #include "test/test_bitcoin.h"
   8
   9 #include <boost/test/unit_test.hpp>
  10 #include <stdint.h>
  11 #include <sstream>
  12 #include <iomanip>
  13 #include <limits>
  14 #include <cmath>
  15 #include <string>
  16 #include <stdio.h>
  17
  18 BOOST_FIXTURE_TEST_SUITE(uint256_tests, BasicTestingSetup)
  19
  20 const unsigned char R1Array[] =
  21     "\x9c\x52\x4a\xdb\xcf\x56\x11\x12\x2b\x29\x12\x5e\x5d\x35\xd2\xd2"
  22     "\x22\x81\xaa\xb5\x33\xf0\x08\x32\xd5\x56\xb1\xf9\xea\xe5\x1d\x7d";
  23 const char R1ArrayHex[] = "7D1DE5EAF9B156D53208F033B5AA8122D2d2355d5e12292b121156cfdb4a529c";
  24 const uint256 R1L = uint256(std::vector<unsigned char>(R1Array,R1Array+32));
  25 const uint160 R1S = uint160(std::vector<unsigned char>(R1Array,R1Array+20));
  26
  27 const unsigned char R2Array[] =
  28     "\x70\x32\x1d\x7c\x47\xa5\x6b\x40\x26\x7e\x0a\xc3\xa6\x9c\xb6\xbf"
  29     "\x13\x30\x47\xa3\x19\x2d\xda\x71\x49\x13\x72\xf0\xb4\xca\x81\xd7";
  30 const uint256 R2L = uint256(std::vector<unsigned char>(R2Array,R2Array+32));
  31 const uint160 R2S = uint160(std::vector<unsigned char>(R2Array,R2Array+20));
  32
  33 const unsigned char ZeroArray[] =
  34     "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
  35     "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00";
  36 const uint256 ZeroL = uint256(std::vector<unsigned char>(ZeroArray,ZeroArray+32));
  37 const uint160 ZeroS = uint160(std::vector<unsigned char>(ZeroArray,ZeroArray+20));
  38
  39 const unsigned char OneArray[] =
  40     "\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
  41     "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00";
  42 const uint256 OneL = uint256(std::vector<unsigned char>(OneArray,OneArray+32));
  43 const uint160 OneS = uint160(std::vector<unsigned char>(OneArray,OneArray+20));
  44
  45 const unsigned char MaxArray[] =
  46     "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
  47     "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff";
  48 const uint256 MaxL = uint256(std::vector<unsigned char>(MaxArray,MaxArray+32));
  49 const uint160 MaxS = uint160(std::vector<unsigned char>(MaxArray,MaxArray+20));
  50
  51 std::string ArrayToString(const unsigned char A[], unsigned int width)
  52 {
  53     std::stringstream Stream;
  54     Stream << std::hex;
  55     for (unsigned int i = 0; i < width; ++i)
  56     {
  57         Stream<<std::setw(2)<<std::setfill('0')<<(unsigned int)A[width-i-1];
  58     }
  59     return Stream.str();
  60 }
  61
  62 inline uint160 uint160S(const char *str)
  63 {
  64     uint160 rv;
  65     rv.SetHex(str);
  66     return rv;
  67 }
  68 inline uint160 uint160S(const std::string& str)
  69 {
  70     uint160 rv;
  71     rv.SetHex(str);
  72     return rv;
  73 }
  74
  75 BOOST_AUTO_TEST_CASE( basics ) // constructors, equality, inequality
  76 {
  77     BOOST_CHECK(1 == 0+1);
  78     // constructor uint256(vector<char>):
  79     BOOST_CHECK(R1L.ToString() == ArrayToString(R1Array,32));
  80     BOOST_CHECK(R1S.ToString() == ArrayToString(R1Array,20));
  81     BOOST_CHECK(R2L.ToString() == ArrayToString(R2Array,32));
  82     BOOST_CHECK(R2S.ToString() == ArrayToString(R2Array,20));
  83     BOOST_CHECK(ZeroL.ToString() == ArrayToString(ZeroArray,32));
  84     BOOST_CHECK(ZeroS.ToString() == ArrayToString(ZeroArray,20));
  85     BOOST_CHECK(OneL.ToString() == ArrayToString(OneArray,32));
  86     BOOST_CHECK(OneS.ToString() == ArrayToString(OneArray,20));
  87     BOOST_CHECK(MaxL.ToString() == ArrayToString(MaxArray,32));
  88     BOOST_CHECK(MaxS.ToString() == ArrayToString(MaxArray,20));
  89     BOOST_CHECK(OneL.ToString() != ArrayToString(ZeroArray,32));
  90     BOOST_CHECK(OneS.ToString() != ArrayToString(ZeroArray,20));
  91
  92     // == and !=
  93     BOOST_CHECK(R1L != R2L && R1S != R2S);
  94     BOOST_CHECK(ZeroL != OneL && ZeroS != OneS);
  95     BOOST_CHECK(OneL != ZeroL && OneS != ZeroS);
  96     BOOST_CHECK(MaxL != ZeroL && MaxS != ZeroS);
  97
  98     // String Constructor and Copy Constructor
  99     BOOST_CHECK(uint256S("0x"+R1L.ToString()) == R1L);
 100     BOOST_CHECK(uint256S("0x"+R2L.ToString()) == R2L);
 101     BOOST_CHECK(uint256S("0x"+ZeroL.ToString()) == ZeroL);
 102     BOOST_CHECK(uint256S("0x"+OneL.ToString()) == OneL);
 103     BOOST_CHECK(uint256S("0x"+MaxL.ToString()) == MaxL);
 104     BOOST_CHECK(uint256S(R1L.ToString()) == R1L);
 105     BOOST_CHECK(uint256S("   0x"+R1L.ToString()+"   ") == R1L);
 106     BOOST_CHECK(uint256S("") == ZeroL);
 107     BOOST_CHECK(R1L == uint256S(R1ArrayHex));
 108     BOOST_CHECK(uint256(R1L) == R1L);
 109     BOOST_CHECK(uint256(ZeroL) == ZeroL);
 110     BOOST_CHECK(uint256(OneL) == OneL);
 111
 112     BOOST_CHECK(uint160S("0x"+R1S.ToString()) == R1S);
 113     BOOST_CHECK(uint160S("0x"+R2S.ToString()) == R2S);
 114     BOOST_CHECK(uint160S("0x"+ZeroS.ToString()) == ZeroS);
 115     BOOST_CHECK(uint160S("0x"+OneS.ToString()) == OneS);
 116     BOOST_CHECK(uint160S("0x"+MaxS.ToString()) == MaxS);
 117     BOOST_CHECK(uint160S(R1S.ToString()) == R1S);
 118     BOOST_CHECK(uint160S("   0x"+R1S.ToString()+"   ") == R1S);
 119     BOOST_CHECK(uint160S("") == ZeroS);
 120     BOOST_CHECK(R1S == uint160S(R1ArrayHex));
 121
 122     BOOST_CHECK(uint160(R1S) == R1S);
 123     BOOST_CHECK(uint160(ZeroS) == ZeroS);
 124     BOOST_CHECK(uint160(OneS) == OneS);
 125 }
 126
 127 BOOST_AUTO_TEST_CASE( comparison ) // <= >= < >
 128 {
 129     uint256 LastL;
 130     for (int i = 255; i >= 0; --i) {
 131         uint256 TmpL;
 132         *(TmpL.begin() + (i>>3)) |= 1<<(7-(i&7));
 133         BOOST_CHECK( LastL < TmpL );
 134         LastL = TmpL;
 135     }
 136
 137     BOOST_CHECK( ZeroL < R1L );
 138     BOOST_CHECK( R2L < R1L );
 139     BOOST_CHECK( ZeroL < OneL );
 140     BOOST_CHECK( OneL < MaxL );
 141     BOOST_CHECK( R1L < MaxL );
 142     BOOST_CHECK( R2L < MaxL );
 143
 144     uint160 LastS;
 145     for (int i = 159; i >= 0; --i) {
 146         uint160 TmpS;
 147         *(TmpS.begin() + (i>>3)) |= 1<<(7-(i&7));
 148         BOOST_CHECK( LastS < TmpS );
 149         LastS = TmpS;
 150     }
 151     BOOST_CHECK( ZeroS < R1S );
 152     BOOST_CHECK( R2S < R1S );
 153     BOOST_CHECK( ZeroS < OneS );
 154     BOOST_CHECK( OneS < MaxS );
 155     BOOST_CHECK( R1S < MaxS );
 156     BOOST_CHECK( R2S < MaxS );
 157 }
 158
 159 BOOST_AUTO_TEST_CASE( methods ) // GetHex SetHex begin() end() size() GetLow64 GetSerializeSize, Serialize, Unserialize
 160 {
 161     BOOST_CHECK(R1L.GetHex() == R1L.ToString());
 162     BOOST_CHECK(R2L.GetHex() == R2L.ToString());
 163     BOOST_CHECK(OneL.GetHex() == OneL.ToString());
 164     BOOST_CHECK(MaxL.GetHex() == MaxL.ToString());
 165     uint256 TmpL(R1L);
 166     BOOST_CHECK(TmpL == R1L);
 167     TmpL.SetHex(R2L.ToString());   BOOST_CHECK(TmpL == R2L);
 168     TmpL.SetHex(ZeroL.ToString()); BOOST_CHECK(TmpL == uint256());
 169
 170     TmpL.SetHex(R1L.ToString());
 171     BOOST_CHECK(memcmp(R1L.begin(), R1Array, 32)==0);
 172     BOOST_CHECK(memcmp(TmpL.begin(), R1Array, 32)==0);
 173     BOOST_CHECK(memcmp(R2L.begin(), R2Array, 32)==0);
 174     BOOST_CHECK(memcmp(ZeroL.begin(), ZeroArray, 32)==0);
 175     BOOST_CHECK(memcmp(OneL.begin(), OneArray, 32)==0);
 176     BOOST_CHECK(R1L.size() == sizeof(R1L));
 177     BOOST_CHECK(sizeof(R1L) == 32);
 178     BOOST_CHECK(R1L.size() == 32);
 179     BOOST_CHECK(R2L.size() == 32);
 180     BOOST_CHECK(ZeroL.size() == 32);
 181     BOOST_CHECK(MaxL.size() == 32);
 182     BOOST_CHECK(R1L.begin() + 32 == R1L.end());
 183     BOOST_CHECK(R2L.begin() + 32 == R2L.end());
 184     BOOST_CHECK(OneL.begin() + 32 == OneL.end());
 185     BOOST_CHECK(MaxL.begin() + 32 == MaxL.end());
 186     BOOST_CHECK(TmpL.begin() + 32 == TmpL.end());
 187     BOOST_CHECK(GetSerializeSize(R1L, 0, PROTOCOL_VERSION) == 32);
 188     BOOST_CHECK(GetSerializeSize(ZeroL, 0, PROTOCOL_VERSION) == 32);
 189
 190     CDataStream ss(0, PROTOCOL_VERSION);
 191     ss << R1L;
 192     BOOST_CHECK(ss.str() == std::string(R1Array,R1Array+32));
 193     ss >> TmpL;
 194     BOOST_CHECK(R1L == TmpL);
 195     ss.clear();
 196     ss << ZeroL;
 197     BOOST_CHECK(ss.str() == std::string(ZeroArray,ZeroArray+32));
 198     ss >> TmpL;
 199     BOOST_CHECK(ZeroL == TmpL);
 200     ss.clear();
 201     ss << MaxL;
 202     BOOST_CHECK(ss.str() == std::string(MaxArray,MaxArray+32));
 203     ss >> TmpL;
 204     BOOST_CHECK(MaxL == TmpL);
 205     ss.clear();
 206
 207     BOOST_CHECK(R1S.GetHex() == R1S.ToString());
 208     BOOST_CHECK(R2S.GetHex() == R2S.ToString());
 209     BOOST_CHECK(OneS.GetHex() == OneS.ToString());
 210     BOOST_CHECK(MaxS.GetHex() == MaxS.ToString());
 211     uint160 TmpS(R1S);
 212     BOOST_CHECK(TmpS == R1S);
 213     TmpS.SetHex(R2S.ToString());   BOOST_CHECK(TmpS == R2S);
 214     TmpS.SetHex(ZeroS.ToString()); BOOST_CHECK(TmpS == uint160());
 215
 216     TmpS.SetHex(R1S.ToString());
 217     BOOST_CHECK(memcmp(R1S.begin(), R1Array, 20)==0);
 218     BOOST_CHECK(memcmp(TmpS.begin(), R1Array, 20)==0);
 219     BOOST_CHECK(memcmp(R2S.begin(), R2Array, 20)==0);
 220     BOOST_CHECK(memcmp(ZeroS.begin(), ZeroArray, 20)==0);
 221     BOOST_CHECK(memcmp(OneS.begin(), OneArray, 20)==0);
 222     BOOST_CHECK(R1S.size() == sizeof(R1S));
 223     BOOST_CHECK(sizeof(R1S) == 20);
 224     BOOST_CHECK(R1S.size() == 20);
 225     BOOST_CHECK(R2S.size() == 20);
 226     BOOST_CHECK(ZeroS.size() == 20);
 227     BOOST_CHECK(MaxS.size() == 20);
 228     BOOST_CHECK(R1S.begin() + 20 == R1S.end());
 229     BOOST_CHECK(R2S.begin() + 20 == R2S.end());
 230     BOOST_CHECK(OneS.begin() + 20 == OneS.end());
 231     BOOST_CHECK(MaxS.begin() + 20 == MaxS.end());
 232     BOOST_CHECK(TmpS.begin() + 20 == TmpS.end());
 233     BOOST_CHECK(GetSerializeSize(R1S, 0, PROTOCOL_VERSION) == 20);
 234     BOOST_CHECK(GetSerializeSize(ZeroS, 0, PROTOCOL_VERSION) == 20);
 235
 236     ss << R1S;
 237     BOOST_CHECK(ss.str() == std::string(R1Array,R1Array+20));
 238     ss >> TmpS;
 239     BOOST_CHECK(R1S == TmpS);
 240     ss.clear();
 241     ss << ZeroS;
 242     BOOST_CHECK(ss.str() == std::string(ZeroArray,ZeroArray+20));
 243     ss >> TmpS;
 244     BOOST_CHECK(ZeroS == TmpS);
 245     ss.clear();
 246     ss << MaxS;
 247     BOOST_CHECK(ss.str() == std::string(MaxArray,MaxArray+20));
 248     ss >> TmpS;
 249     BOOST_CHECK(MaxS == TmpS);
 250     ss.clear();
 251 }
 252
 253 BOOST_AUTO_TEST_CASE( conversion )
 254 {
 255     BOOST_CHECK(ArithToUint256(UintToArith256(ZeroL)) == ZeroL);
 256     BOOST_CHECK(ArithToUint256(UintToArith256(OneL)) == OneL);
 257     BOOST_CHECK(ArithToUint256(UintToArith256(R1L)) == R1L);
 258     BOOST_CHECK(ArithToUint256(UintToArith256(R2L)) == R2L);
 259     BOOST_CHECK(UintToArith256(ZeroL) == 0);
 260     BOOST_CHECK(UintToArith256(OneL) == 1);
 261     BOOST_CHECK(ArithToUint256(0) == ZeroL);
 262     BOOST_CHECK(ArithToUint256(1) == OneL);
 263     BOOST_CHECK(arith_uint256(R1L.GetHex()) == UintToArith256(R1L));
 264     BOOST_CHECK(arith_uint256(R2L.GetHex()) == UintToArith256(R2L));
 265     BOOST_CHECK(R1L.GetHex() == UintToArith256(R1L).GetHex());
 266     BOOST_CHECK(R2L.GetHex() == UintToArith256(R2L).GetHex());
 267 }
 268
 269 BOOST_AUTO_TEST_SUITE_END()