src/test/scriptnum_tests.cpp

   1 // Copyright (c) 2012-2015 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
   5 #include "scriptnum10.h"
   6 #include "script/script.h"
   7 #include "test/test_bitcoin.h"
   8
   9 #include <boost/test/unit_test.hpp>
  10 #include <limits.h>
  11 #include <stdint.h>
  12
  13 BOOST_FIXTURE_TEST_SUITE(scriptnum_tests, BasicTestingSetup)
  14
  15 static const int64_t values[] = \
  16 { 0, 1, CHAR_MIN, CHAR_MAX, UCHAR_MAX, SHRT_MIN, USHRT_MAX, INT_MIN, INT_MAX, UINT_MAX, LONG_MIN, LONG_MAX };
  17 static const int64_t offsets[] = { 1, 0x79, 0x80, 0x81, 0xFF, 0x7FFF, 0x8000, 0xFFFF, 0x10000};
  18
  19 static bool verify(const CScriptNum10& bignum, const CScriptNum& scriptnum)
  20 {
  21     return bignum.getvch() == scriptnum.getvch() && bignum.getint() == scriptnum.getint();
  22 }
  23
  24 static void CheckCreateVch(const int64_t& num)
  25 {
  26     CScriptNum10 bignum(num);
  27     CScriptNum scriptnum(num);
  28     BOOST_CHECK(verify(bignum, scriptnum));
  29
  30     std::vector<unsigned char> vch = bignum.getvch();
  31
  32     CScriptNum10 bignum2(bignum.getvch(), false);
  33     vch = scriptnum.getvch();
  34     CScriptNum scriptnum2(scriptnum.getvch(), false);
  35     BOOST_CHECK(verify(bignum2, scriptnum2));
  36
  37     CScriptNum10 bignum3(scriptnum2.getvch(), false);
  38     CScriptNum scriptnum3(bignum2.getvch(), false);
  39     BOOST_CHECK(verify(bignum3, scriptnum3));
  40 }
  41
  42 static void CheckCreateInt(const int64_t& num)
  43 {
  44     CScriptNum10 bignum(num);
  45     CScriptNum scriptnum(num);
  46     BOOST_CHECK(verify(bignum, scriptnum));
  47     BOOST_CHECK(verify(CScriptNum10(bignum.getint()), CScriptNum(scriptnum.getint())));
  48     BOOST_CHECK(verify(CScriptNum10(scriptnum.getint()), CScriptNum(bignum.getint())));
  49     BOOST_CHECK(verify(CScriptNum10(CScriptNum10(scriptnum.getint()).getint()), CScriptNum(CScriptNum(bignum.getint()).getint())));
  50 }
  51
  52
  53 static void CheckAdd(const int64_t& num1, const int64_t& num2)
  54 {
  55     const CScriptNum10 bignum1(num1);
  56     const CScriptNum10 bignum2(num2);
  57     const CScriptNum scriptnum1(num1);
  58     const CScriptNum scriptnum2(num2);
  59     CScriptNum10 bignum3(num1);
  60     CScriptNum10 bignum4(num1);
  61     CScriptNum scriptnum3(num1);
  62     CScriptNum scriptnum4(num1);
  63
  64     // int64_t overflow is undefined.
  65     bool invalid = (((num2 > 0) && (num1 > (std::numeric_limits<int64_t>::max() - num2))) ||
  66                     ((num2 < 0) && (num1 < (std::numeric_limits<int64_t>::min() - num2))));
  67     if (!invalid)
  68     {
  69         BOOST_CHECK(verify(bignum1 + bignum2, scriptnum1 + scriptnum2));
  70         BOOST_CHECK(verify(bignum1 + bignum2, scriptnum1 + num2));
  71         BOOST_CHECK(verify(bignum1 + bignum2, scriptnum2 + num1));
  72     }
  73 }
  74
  75 static void CheckNegate(const int64_t& num)
  76 {
  77     const CScriptNum10 bignum(num);
  78     const CScriptNum scriptnum(num);
  79
  80     // -INT64_MIN is undefined
  81     if (num != std::numeric_limits<int64_t>::min())
  82         BOOST_CHECK(verify(-bignum, -scriptnum));
  83 }
  84
  85 static void CheckSubtract(const int64_t& num1, const int64_t& num2)
  86 {
  87     const CScriptNum10 bignum1(num1);
  88     const CScriptNum10 bignum2(num2);
  89     const CScriptNum scriptnum1(num1);
  90     const CScriptNum scriptnum2(num2);
  91     bool invalid = false;
  92
  93     // int64_t overflow is undefined.
  94     invalid = ((num2 > 0 && num1 < std::numeric_limits<int64_t>::min() + num2) ||
  95                (num2 < 0 && num1 > std::numeric_limits<int64_t>::max() + num2));
  96     if (!invalid)
  97     {
  98         BOOST_CHECK(verify(bignum1 - bignum2, scriptnum1 - scriptnum2));
  99         BOOST_CHECK(verify(bignum1 - bignum2, scriptnum1 - num2));
 100     }
 101
 102     invalid = ((num1 > 0 && num2 < std::numeric_limits<int64_t>::min() + num1) ||
 103                (num1 < 0 && num2 > std::numeric_limits<int64_t>::max() + num1));
 104     if (!invalid)
 105     {
 106         BOOST_CHECK(verify(bignum2 - bignum1, scriptnum2 - scriptnum1));
 107         BOOST_CHECK(verify(bignum2 - bignum1, scriptnum2 - num1));
 108     }
 109 }
 110
 111 static void CheckCompare(const int64_t& num1, const int64_t& num2)
 112 {
 113     const CScriptNum10 bignum1(num1);
 114     const CScriptNum10 bignum2(num2);
 115     const CScriptNum scriptnum1(num1);
 116     const CScriptNum scriptnum2(num2);
 117
 118     BOOST_CHECK((bignum1 == bignum1) == (scriptnum1 == scriptnum1));
 119     BOOST_CHECK((bignum1 != bignum1) ==  (scriptnum1 != scriptnum1));
 120     BOOST_CHECK((bignum1 < bignum1) ==  (scriptnum1 < scriptnum1));
 121     BOOST_CHECK((bignum1 > bignum1) ==  (scriptnum1 > scriptnum1));
 122     BOOST_CHECK((bignum1 >= bignum1) ==  (scriptnum1 >= scriptnum1));
 123     BOOST_CHECK((bignum1 <= bignum1) ==  (scriptnum1 <= scriptnum1));
 124
 125     BOOST_CHECK((bignum1 == bignum1) == (scriptnum1 == num1));
 126     BOOST_CHECK((bignum1 != bignum1) ==  (scriptnum1 != num1));
 127     BOOST_CHECK((bignum1 < bignum1) ==  (scriptnum1 < num1));
 128     BOOST_CHECK((bignum1 > bignum1) ==  (scriptnum1 > num1));
 129     BOOST_CHECK((bignum1 >= bignum1) ==  (scriptnum1 >= num1));
 130     BOOST_CHECK((bignum1 <= bignum1) ==  (scriptnum1 <= num1));
 131
 132     BOOST_CHECK((bignum1 == bignum2) ==  (scriptnum1 == scriptnum2));
 133     BOOST_CHECK((bignum1 != bignum2) ==  (scriptnum1 != scriptnum2));
 134     BOOST_CHECK((bignum1 < bignum2) ==  (scriptnum1 < scriptnum2));
 135     BOOST_CHECK((bignum1 > bignum2) ==  (scriptnum1 > scriptnum2));
 136     BOOST_CHECK((bignum1 >= bignum2) ==  (scriptnum1 >= scriptnum2));
 137     BOOST_CHECK((bignum1 <= bignum2) ==  (scriptnum1 <= scriptnum2));
 138
 139     BOOST_CHECK((bignum1 == bignum2) ==  (scriptnum1 == num2));
 140     BOOST_CHECK((bignum1 != bignum2) ==  (scriptnum1 != num2));
 141     BOOST_CHECK((bignum1 < bignum2) ==  (scriptnum1 < num2));
 142     BOOST_CHECK((bignum1 > bignum2) ==  (scriptnum1 > num2));
 143     BOOST_CHECK((bignum1 >= bignum2) ==  (scriptnum1 >= num2));
 144     BOOST_CHECK((bignum1 <= bignum2) ==  (scriptnum1 <= num2));
 145 }
 146
 147 static void RunCreate(const int64_t& num)
 148 {
 149     CheckCreateInt(num);
 150     CScriptNum scriptnum(num);
 151     if (scriptnum.getvch().size() <= CScriptNum::nDefaultMaxNumSize)
 152         CheckCreateVch(num);
 153     else
 154     {
 155         BOOST_CHECK_THROW (CheckCreateVch(num), scriptnum10_error);
 156     }
 157 }
 158
 159 static void RunOperators(const int64_t& num1, const int64_t& num2)
 160 {
 161     CheckAdd(num1, num2);
 162     CheckSubtract(num1, num2);
 163     CheckNegate(num1);
 164     CheckCompare(num1, num2);
 165 }
 166
 167 BOOST_AUTO_TEST_CASE(creation)
 168 {
 169     for(size_t i = 0; i < sizeof(values) / sizeof(values[0]); ++i)
 170     {
 171         for(size_t j = 0; j < sizeof(offsets) / sizeof(offsets[0]); ++j)
 172         {
 173             RunCreate(values[i]);
 174             RunCreate(values[i] + offsets[j]);
 175             RunCreate(values[i] - offsets[j]);
 176         }
 177     }
 178 }
 179
 180 BOOST_AUTO_TEST_CASE(operators)
 181 {
 182     for(size_t i = 0; i < sizeof(values) / sizeof(values[0]); ++i)
 183     {
 184         for(size_t j = 0; j < sizeof(offsets) / sizeof(offsets[0]); ++j)
 185         {
 186             RunOperators(values[i], values[i]);
 187             RunOperators(values[i], -values[i]);
 188             RunOperators(values[i], values[j]);
 189             RunOperators(values[i], -values[j]);
 190             RunOperators(values[i] + values[j], values[j]);
 191             RunOperators(values[i] + values[j], -values[j]);
 192             RunOperators(values[i] - values[j], values[j]);
 193             RunOperators(values[i] - values[j], -values[j]);
 194             RunOperators(values[i] + values[j], values[i] + values[j]);
 195             RunOperators(values[i] + values[j], values[i] - values[j]);
 196             RunOperators(values[i] - values[j], values[i] + values[j]);
 197             RunOperators(values[i] - values[j], values[i] - values[j]);
 198         }
 199     }
 200 }
 201
 202 BOOST_AUTO_TEST_SUITE_END()