sal/qa/rtl/random/rtl_random.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <memory>
  21 #include <algorithm>
  22
  23 #include <sal/types.h>
  24 #include <cppunit/TestAssert.h>
  25 #include <cppunit/TestFixture.h>
  26 #include <cppunit/extensions/HelperMacros.h>
  27
  28 #include <rtl/random.h>
  29
  30 #include <string.h>
  31
  32 namespace rtl_random
  33 {
  34
  35 class createPool : public CppUnit::TestFixture
  36 {
  37 public:
  38     // insert your test code here.
  39     // this is only demonstration code
  40     void createPool_001()
  41     {
  42         // this is demonstration code
  43
  44         rtlRandomPool aPool = rtl_random_createPool();
  45
  46         // LLA: seems to be that another test is not possible for createPool()
  47         CPPUNIT_ASSERT_MESSAGE("create failed", aPool != nullptr);
  48
  49         rtl_random_destroyPool(aPool);
  50     }
  51
  52     // Change the following lines only, if you add, remove or rename
  53     // member functions of the current class,
  54     // because these macros are need by auto register mechanism.
  55
  56     CPPUNIT_TEST_SUITE(createPool);
  57     CPPUNIT_TEST(createPool_001);
  58     CPPUNIT_TEST_SUITE_END();
  59 }; // class createPool
  60
  61 class destroyPool : public CppUnit::TestFixture
  62 {
  63 public:
  64     // insert your test code here.
  65     void destroyPool_000()
  66     {
  67         // GPF, if failed
  68         rtl_random_destroyPool(nullptr);
  69     }
  70
  71     void destroyPool_001()
  72     {
  73         rtlRandomPool aPool = rtl_random_createPool();
  74
  75         // LLA: seems to be that another test is not possible for createPool()
  76         CPPUNIT_ASSERT_MESSAGE("create failed", aPool != nullptr);
  77
  78         rtl_random_destroyPool(aPool);
  79     }
  80     // Change the following lines only, if you add, remove or rename
  81     // member functions of the current class,
  82     // because these macros are need by auto register mechanism.
  83
  84     CPPUNIT_TEST_SUITE(destroyPool);
  85     CPPUNIT_TEST(destroyPool_000);
  86     CPPUNIT_TEST(destroyPool_001);
  87     CPPUNIT_TEST_SUITE_END();
  88 }; // class destroyPool
  89
  90 class addBytes : public CppUnit::TestFixture
  91 {
  92 public:
  93     // insert your test code here.
  94     // this is only demonstration code
  95     void addBytes_000()
  96     {
  97         rtlRandomPool aPool = rtl_random_createPool();
  98
  99         sal_uInt32  nBufLen = 4;
 100         std::unique_ptr<sal_uInt8[]>  pBuffer( new sal_uInt8[ nBufLen ] );
 101         memset(pBuffer.get(), 0, nBufLen);
 102
 103         rtlRandomError aError = rtl_random_addBytes(nullptr, nullptr, 0);
 104         CPPUNIT_ASSERT_EQUAL_MESSAGE("wrong parameter", rtl_Random_E_Argument, aError);
 105
 106         /* rtlRandomError */ aError = rtl_random_addBytes(aPool, nullptr, 0);
 107         CPPUNIT_ASSERT_EQUAL_MESSAGE("wrong parameter", rtl_Random_E_Argument, aError);
 108
 109         /* rtlRandomError */ aError = rtl_random_addBytes(aPool, pBuffer.get(), nBufLen);
 110         CPPUNIT_ASSERT_EQUAL_MESSAGE("wrong parameter", rtl_Random_E_None, aError);
 111
 112         rtl_random_destroyPool(aPool);
 113     }
 114
 115     void addBytes_001()
 116         {
 117             rtlRandomPool aPool = rtl_random_createPool();
 118
 119             sal_uInt32  nBufLen = 4;
 120             std::unique_ptr<sal_uInt8[]> pBuffer( new sal_uInt8[ nBufLen ] );
 121
 122             memset(pBuffer.get(), 0, nBufLen);
 123
 124             rtl_random_addBytes(aPool, pBuffer.get(), nBufLen);
 125
 126             printf("%2x %2x %2x %2x\n", pBuffer[0], pBuffer[1], pBuffer[2], pBuffer[3]);
 127
 128             rtl_random_destroyPool(aPool);
 129         }
 130
 131     // Change the following lines only, if you add, remove or rename
 132     // member functions of the current class,
 133     // because these macros are need by auto register mechanism.
 134
 135     CPPUNIT_TEST_SUITE(addBytes);
 136     CPPUNIT_TEST(addBytes_000);
 137     CPPUNIT_TEST(addBytes_001);
 138     CPPUNIT_TEST_SUITE_END();
 139 }; // class addBytes
 140
 141 namespace {
 142
 143 class Statistics
 144 {
 145     int m_nDispensation[256];
 146
 147     int m_nMin;
 148     int m_nMax;
 149     int m_nAverage;
 150     int m_nMinDeviation;
 151     int m_nMaxDeviation;
 152
 153 public:
 154     void clearDispensation()
 155     {
 156         for (int i = 0;i < 256;++i)                        // clear array
 157         {
 158             m_nDispensation[i] = 0;
 159         }
 160     }
 161     Statistics()
 162     : m_nMin(0)
 163     , m_nMax(0)
 164     , m_nAverage(0)
 165     , m_nMinDeviation(0)
 166     , m_nMaxDeviation(0)
 167     {
 168         clearDispensation();
 169     }
 170
 171     void addValue(sal_uInt8 _nIndex, sal_Int32 _nValue)
 172     {
 173         m_nDispensation[_nIndex] += _nValue;
 174     }
 175
 176     void build(sal_Int32 _nCountMax)
 177     {
 178         m_nMin = _nCountMax;
 179         m_nMax = 0;
 180
 181         m_nAverage = _nCountMax / 256;
 182
 183         m_nMinDeviation = _nCountMax;
 184         m_nMaxDeviation = 0;
 185
 186         for (int i = 0;i < 256;++i)                        // show dispensation
 187         {
 188             m_nMin = std::min(m_nMin, m_nDispensation[i]);
 189             m_nMax = std::max(m_nMax, m_nDispensation[i]);
 190
 191             m_nMinDeviation = std::min(m_nMinDeviation, abs(m_nAverage - m_nDispensation[i]));
 192             m_nMaxDeviation = std::max(m_nMaxDeviation, abs(m_nAverage - m_nDispensation[i]));
 193         }
 194     }
 195
 196     void print()
 197     {
 198         // LLA: these are only info values
 199         printf("\nSome statistics\n");
 200         printf("Min: %d\n", m_nMin);
 201         printf("Max: %d\n", m_nMax);
 202         printf("Average: %d\n", m_nAverage);
 203         printf("Min abs deviation: %d\n", m_nMinDeviation);
 204         printf("Max abs deviation: %d\n", m_nMaxDeviation);
 205     }
 206
 207     sal_Int32 getAverage() const {return m_nAverage;}
 208     sal_Int32 getMaxDeviation() const {return m_nMaxDeviation;}
 209
 210 };
 211
 212 }
 213
 214 class getBytes : public CppUnit::TestFixture
 215 {
 216 public:
 217     // insert your test code here.
 218     void getBytes_000()
 219     {
 220         rtlRandomPool aPool = rtl_random_createPool();
 221
 222         sal_uInt32  nBufLen = 4;
 223         std::unique_ptr<sal_uInt8[]> pBuffer( new sal_uInt8[ nBufLen ] );
 224         memset(pBuffer.get(), 0, nBufLen);
 225
 226         rtlRandomError aError = rtl_random_getBytes(nullptr, nullptr, 0);
 227         CPPUNIT_ASSERT_EQUAL_MESSAGE("wrong parameter", rtl_Random_E_Argument, aError);
 228
 229         /* rtlRandomError */ aError = rtl_random_getBytes(aPool, nullptr, 0);
 230         CPPUNIT_ASSERT_EQUAL_MESSAGE("wrong parameter", rtl_Random_E_Argument, aError);
 231
 232         /* rtlRandomError */ aError = rtl_random_getBytes(aPool, pBuffer.get(), nBufLen);
 233         CPPUNIT_ASSERT_EQUAL_MESSAGE("wrong parameter", rtl_Random_E_None, aError);
 234
 235         rtl_random_destroyPool(aPool);
 236     }
 237
 238     void getBytes_001()
 239     {
 240         rtlRandomPool aPool = rtl_random_createPool();
 241
 242         sal_uInt32  nBufLen = 4;
 243         std::unique_ptr<sal_uInt8[]> pBuffer( new sal_uInt8[ nBufLen ] );
 244         memset(pBuffer.get(), 0, nBufLen);
 245
 246         rtlRandomError aError = rtl_random_getBytes(aPool, pBuffer.get(), nBufLen);
 247         CPPUNIT_ASSERT_EQUAL_MESSAGE("wrong parameter", rtl_Random_E_None, aError);
 248
 249         printf("%2x %2x %2x %2x\n", pBuffer[0], pBuffer[1], pBuffer[2], pBuffer[3]);
 250
 251         rtl_random_destroyPool(aPool);
 252     }
 253
 254     void getBytes_002()
 255     {
 256         rtlRandomPool aPool = rtl_random_createPool();
 257
 258         sal_uInt32  nBufLen = 4;
 259         std::unique_ptr<sal_uInt8[]>  pBuffer( new sal_uInt8[ nBufLen << 1 ] );
 260         memset(pBuffer.get(), 0, nBufLen << 1);
 261
 262         CPPUNIT_ASSERT_EQUAL_MESSAGE("memset failed", sal_uInt8(0), pBuffer[4]);
 263         CPPUNIT_ASSERT_EQUAL_MESSAGE("memset failed", sal_uInt8(0), pBuffer[5]);
 264         CPPUNIT_ASSERT_EQUAL_MESSAGE("memset failed", sal_uInt8(0), pBuffer[6]);
 265         CPPUNIT_ASSERT_EQUAL_MESSAGE("memset failed", sal_uInt8(0), pBuffer[7]);
 266
 267         rtlRandomError aError = rtl_random_getBytes(aPool, pBuffer.get(), nBufLen);
 268         CPPUNIT_ASSERT_EQUAL_MESSAGE("wrong parameter", rtl_Random_E_None, aError);
 269
 270         printf("%2x %2x %2x %2x %2x %2x %2x %2x\n", pBuffer[0], pBuffer[1], pBuffer[2], pBuffer[3], pBuffer[4], pBuffer[5], pBuffer[6], pBuffer[7]);
 271
 272         CPPUNIT_ASSERT_EQUAL_MESSAGE("internal memory overwrite", sal_uInt8(0), pBuffer[4]);
 273         CPPUNIT_ASSERT_EQUAL_MESSAGE("internal memory overwrite", sal_uInt8(0), pBuffer[5]);
 274         CPPUNIT_ASSERT_EQUAL_MESSAGE("internal memory overwrite", sal_uInt8(0), pBuffer[6]);
 275         CPPUNIT_ASSERT_EQUAL_MESSAGE("internal memory overwrite", sal_uInt8(0), pBuffer[7]);
 276
 277         rtl_random_destroyPool(aPool);
 278     }
 279
 280     void getBytes_003()
 281     {
 282         rtlRandomPool aPool = rtl_random_createPool();
 283
 284         sal_uInt32  nBufLen = 1;
 285         std::unique_ptr<sal_uInt8[]> pBuffer( new sal_uInt8[ nBufLen ] );
 286         memset(pBuffer.get(), 0, nBufLen);
 287
 288         Statistics aStat;
 289
 290         CPPUNIT_ASSERT_EQUAL_MESSAGE("memset failed", static_cast<sal_uInt8>(0), pBuffer[0]);
 291
 292         int nCount = 0;
 293
 294         int nCountMax = 1000000;
 295         for(nCount = 0;nCount < nCountMax; ++nCount)                  // run 100000000 through getBytes(...)
 296         {
 297             /* rtlRandomError aError = */ rtl_random_getBytes(aPool, pBuffer.get(), nBufLen);
 298             /* CPPUNIT_ASSERT_MESSAGE("wrong parameter", aError == rtl_Random_E_None); */
 299
 300             aStat.addValue(pBuffer[0], 1);
 301         }
 302
 303         aStat.build(nCountMax);
 304         aStat.print();
 305
 306         CPPUNIT_ASSERT_MESSAGE("deviation should be less average", aStat.getMaxDeviation() < aStat.getAverage());
 307
 308         rtl_random_destroyPool(aPool);
 309     }
 310
 311     void getBytes_003_1()
 312     {
 313         rtlRandomPool aPool = rtl_random_createPool();
 314
 315         sal_uInt32  nBufLen = 256;
 316         std::unique_ptr<sal_uInt8[]> pBuffer( new sal_uInt8[ nBufLen ] );
 317         memset(pBuffer.get(), 0, nBufLen);
 318
 319         Statistics aStat;
 320
 321         CPPUNIT_ASSERT_EQUAL_MESSAGE("memset failed", static_cast<sal_uInt8>(0), pBuffer[0]);
 322
 323         int nCount = 0;
 324
 325         int nCountMax = 10000;
 326         for(nCount = 0;nCount < nCountMax; ++nCount)                  // run 100000000 through getBytes(...)
 327         {
 328             /* rtlRandomError aError = */ rtl_random_getBytes(aPool, pBuffer.get(), nBufLen);
 329             // CPPUNIT_ASSERT_MESSAGE("wrong parameter", aError == rtl_Random_E_None);
 330
 331             for (sal_uInt32 i=0;i<nBufLen;++i)
 332                 aStat.addValue(pBuffer[i], 1);
 333         }
 334
 335         aStat.build(nCountMax * nBufLen);
 336         aStat.print();
 337
 338         CPPUNIT_ASSERT_MESSAGE("deviation should be less average", aStat.getMaxDeviation() < aStat.getAverage());
 339
 340         rtl_random_destroyPool(aPool);
 341     }
 342
 343     // Change the following lines only, if you add, remove or rename
 344     // member functions of the current class,
 345     // because these macros are need by auto register mechanism.
 346
 347     CPPUNIT_TEST_SUITE(getBytes);
 348     CPPUNIT_TEST(getBytes_000);
 349     CPPUNIT_TEST(getBytes_001);
 350     CPPUNIT_TEST(getBytes_002);
 351     CPPUNIT_TEST(getBytes_003);
 352     CPPUNIT_TEST(getBytes_003_1);
 353     CPPUNIT_TEST_SUITE_END();
 354 }; // class getBytes
 355
 356 CPPUNIT_TEST_SUITE_REGISTRATION(rtl_random::createPool);
 357 CPPUNIT_TEST_SUITE_REGISTRATION(rtl_random::destroyPool);
 358 CPPUNIT_TEST_SUITE_REGISTRATION(rtl_random::addBytes);
 359 CPPUNIT_TEST_SUITE_REGISTRATION(rtl_random::getBytes);
 360 } // namespace rtl_random
 361
 362 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */