sal/qa/rtl/random/rtl_random.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
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   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 <algorithm>
  21
  22 #include <sal/types.h>
  23 #include <cppunit/TestAssert.h>
  24 #include <cppunit/TestFixture.h>
  25 #include <cppunit/extensions/HelperMacros.h>
  26 #include <cppunit/plugin/TestPlugIn.h>
  27
  28 #include <osl/diagnose.h>
  29 #include <rtl/random.h>
  30
  31 #include <string.h>
  32
  33 namespace rtl_random
  34 {
  35
  36 class createPool : public CppUnit::TestFixture
  37 {
  38 public:
  39     // initialise your test code values here.
  40     void setUp()
  41     {
  42     }
  43
  44     void tearDown()
  45     {
  46     }
  47
  48     // insert your test code here.
  49     // this is only demonstration code
  50     void createPool_001()
  51     {
  52         // this is demonstration code
  53
  54         rtlRandomPool aPool = rtl_random_createPool();
  55
  56         // LLA: seems to be that an other test is not possible for createPool()
  57         CPPUNIT_ASSERT_MESSAGE("create failed", aPool != NULL);
  58
  59         rtl_random_destroyPool(aPool);
  60     }
  61
  62     // Change the following lines only, if you add, remove or rename
  63     // member functions of the current class,
  64     // because these macros are need by auto register mechanism.
  65
  66     CPPUNIT_TEST_SUITE(createPool);
  67     CPPUNIT_TEST(createPool_001);
  68     CPPUNIT_TEST_SUITE_END();
  69 }; // class createPool
  70
  71 class destroyPool : public CppUnit::TestFixture
  72 {
  73 public:
  74     // initialise your test code values here.
  75     void setUp()
  76     {
  77     }
  78
  79     void tearDown()
  80     {
  81     }
  82
  83     // insert your test code here.
  84     void destroyPool_000()
  85     {
  86         // GPF, if failed
  87         rtl_random_destroyPool(NULL);
  88     }
  89
  90     void destroyPool_001()
  91     {
  92         rtlRandomPool aPool = rtl_random_createPool();
  93
  94         // LLA: seems to be that an other test is not possible for createPool()
  95         CPPUNIT_ASSERT_MESSAGE("create failed", aPool != NULL);
  96
  97         rtl_random_destroyPool(aPool);
  98     }
  99     // Change the following lines only, if you add, remove or rename
 100     // member functions of the current class,
 101     // because these macros are need by auto register mechanism.
 102
 103     CPPUNIT_TEST_SUITE(destroyPool);
 104     CPPUNIT_TEST(destroyPool_000);
 105     CPPUNIT_TEST(destroyPool_001);
 106     CPPUNIT_TEST_SUITE_END();
 107 }; // class destroyPool
 108
 109 class addBytes : public CppUnit::TestFixture
 110 {
 111 public:
 112     // initialise your test code values here.
 113     void setUp()
 114     {
 115     }
 116
 117     void tearDown()
 118     {
 119     }
 120
 121     // insert your test code here.
 122     // this is only demonstration code
 123     void addBytes_000()
 124     {
 125         rtlRandomPool aPool = rtl_random_createPool();
 126
 127         sal_uInt32  nBufLen = 4;
 128         sal_uInt8   *pBuffer = new sal_uInt8[ nBufLen ];
 129         memset(pBuffer, 0, nBufLen);
 130
 131         rtlRandomError aError = rtl_random_addBytes(NULL, NULL, 0);
 132         CPPUNIT_ASSERT_MESSAGE("wrong parameter", aError == rtl_Random_E_Argument);
 133
 134         /* rtlRandomError */ aError = rtl_random_addBytes(aPool, NULL, 0);
 135         CPPUNIT_ASSERT_MESSAGE("wrong parameter", aError == rtl_Random_E_Argument);
 136
 137         /* rtlRandomError */ aError = rtl_random_addBytes(aPool, pBuffer, nBufLen);
 138         CPPUNIT_ASSERT_MESSAGE("wrong parameter", aError == rtl_Random_E_None);
 139
 140         rtl_random_destroyPool(aPool);
 141         delete [] pBuffer;
 142
 143     }
 144
 145     void addBytes_001()
 146         {
 147             rtlRandomPool aPool = rtl_random_createPool();
 148
 149             sal_uInt32  nBufLen = 4;
 150             sal_uInt8   *pBuffer = new sal_uInt8[ nBufLen ];
 151
 152             memset(pBuffer, 0, nBufLen);
 153
 154             rtl_random_addBytes(aPool, pBuffer, nBufLen);
 155
 156             printf("%2x %2x %2x %2x\n", pBuffer[0], pBuffer[1], pBuffer[2], pBuffer[3]);
 157
 158             rtl_random_destroyPool(aPool);
 159             delete [] pBuffer;
 160         }
 161
 162     // Change the following lines only, if you add, remove or rename
 163     // member functions of the current class,
 164     // because these macros are need by auto register mechanism.
 165
 166     CPPUNIT_TEST_SUITE(addBytes);
 167     CPPUNIT_TEST(addBytes_000);
 168     CPPUNIT_TEST(addBytes_001);
 169     CPPUNIT_TEST_SUITE_END();
 170 }; // class addBytes
 171
 172 class Statistics
 173 {
 174     int m_nDispensation[256];
 175
 176     int m_nMin;
 177     int m_nMax;
 178     int m_nAverage;
 179     int m_nMinDeviation;
 180     int m_nMaxDeviation;
 181
 182 public:
 183     void clearDispensation()
 184     {
 185         for (int i = 0;i < 256;++i)                        // clear array
 186         {
 187             m_nDispensation[i] = 0;
 188         }
 189     }
 190     Statistics()
 191     : m_nMin(0)
 192     , m_nMax(0)
 193     , m_nAverage(0)
 194     , m_nMinDeviation(0)
 195     , m_nMaxDeviation(0)
 196     {
 197         clearDispensation();
 198     }
 199     ~Statistics(){}
 200
 201     void addValue(sal_Int16 _nIndex, sal_Int32 _nValue)
 202     {
 203         OSL_ASSERT(_nIndex >= 0 && _nIndex < 256);
 204         m_nDispensation[_nIndex] += _nValue;
 205     }
 206
 207     void build(sal_Int32 _nCountMax)
 208     {
 209         m_nMin = _nCountMax;
 210         m_nMax = 0;
 211
 212         m_nAverage = _nCountMax / 256;
 213
 214         m_nMinDeviation = _nCountMax;
 215         m_nMaxDeviation = 0;
 216
 217         for (int i = 0;i < 256;++i)                        // show dispensation
 218         {
 219             m_nMin = std::min(m_nMin, m_nDispensation[i]);
 220             m_nMax = std::max(m_nMax, m_nDispensation[i]);
 221
 222             m_nMinDeviation = std::min(m_nMinDeviation, abs(m_nAverage - m_nDispensation[i]));
 223             m_nMaxDeviation = std::max(m_nMaxDeviation, abs(m_nAverage - m_nDispensation[i]));
 224         }
 225     }
 226
 227     void print()
 228     {
 229         // LLA: these are only info values
 230         printf("\nSome statistics\n");
 231         printf("Min: %d\n", m_nMin);
 232         printf("Max: %d\n", m_nMax);
 233         printf("Average: %d\n", m_nAverage);
 234         printf("Min abs deviation: %d\n", m_nMinDeviation);
 235         printf("Max abs deviation: %d\n", m_nMaxDeviation);
 236     }
 237
 238     sal_Int32 getAverage() const {return m_nAverage;}
 239     sal_Int32 getMaxDeviation() const {return m_nMaxDeviation;}
 240
 241 };
 242
 243 class getBytes : public CppUnit::TestFixture
 244 {
 245 public:
 246     // initialise your test code values here.
 247     void setUp()
 248     {
 249     }
 250
 251     void tearDown()
 252     {
 253     }
 254
 255     // insert your test code here.
 256     void getBytes_000()
 257     {
 258         rtlRandomPool aPool = rtl_random_createPool();
 259
 260         sal_uInt32  nBufLen = 4;
 261         sal_uInt8   *pBuffer = new sal_uInt8[ nBufLen ];
 262         memset(pBuffer, 0, nBufLen);
 263
 264         rtlRandomError aError = rtl_random_getBytes(NULL, NULL, 0);
 265         CPPUNIT_ASSERT_MESSAGE("wrong parameter", aError == rtl_Random_E_Argument);
 266
 267         /* rtlRandomError */ aError = rtl_random_getBytes(aPool, NULL, 0);
 268         CPPUNIT_ASSERT_MESSAGE("wrong parameter", aError == rtl_Random_E_Argument);
 269
 270         /* rtlRandomError */ aError = rtl_random_getBytes(aPool, pBuffer, nBufLen);
 271         CPPUNIT_ASSERT_MESSAGE("wrong parameter", aError == rtl_Random_E_None);
 272
 273         rtl_random_destroyPool(aPool);
 274         delete [] pBuffer;
 275     }
 276
 277     void getBytes_001()
 278     {
 279         rtlRandomPool aPool = rtl_random_createPool();
 280
 281         sal_uInt32  nBufLen = 4;
 282         sal_uInt8   *pBuffer = new sal_uInt8[ nBufLen ];
 283         memset(pBuffer, 0, nBufLen);
 284
 285         rtlRandomError aError = rtl_random_getBytes(aPool, pBuffer, nBufLen);
 286         CPPUNIT_ASSERT_MESSAGE("wrong parameter", aError == rtl_Random_E_None);
 287
 288         printf("%2x %2x %2x %2x\n", pBuffer[0], pBuffer[1], pBuffer[2], pBuffer[3]);
 289
 290         rtl_random_destroyPool(aPool);
 291         delete [] pBuffer;
 292     }
 293
 294     void getBytes_002()
 295     {
 296         rtlRandomPool aPool = rtl_random_createPool();
 297
 298         sal_uInt32  nBufLen = 4;
 299         sal_uInt8   *pBuffer = new sal_uInt8[ nBufLen << 1 ];
 300         memset(pBuffer, 0, nBufLen << 1);
 301
 302         CPPUNIT_ASSERT_MESSAGE("memset failed", pBuffer[4] == 0 && pBuffer[5] == 0 && pBuffer[6] == 0 && pBuffer[7] == 0);
 303
 304         rtlRandomError aError = rtl_random_getBytes(aPool, pBuffer, nBufLen);
 305         CPPUNIT_ASSERT_MESSAGE("wrong parameter", aError == rtl_Random_E_None);
 306
 307         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]);
 308
 309         CPPUNIT_ASSERT_MESSAGE("internal memory overwrite", pBuffer[4] == 0 && pBuffer[5] == 0 && pBuffer[6] == 0 && pBuffer[7] == 0);
 310
 311         rtl_random_destroyPool(aPool);
 312         delete [] pBuffer;
 313     }
 314
 315     void getBytes_003()
 316     {
 317         rtlRandomPool aPool = rtl_random_createPool();
 318
 319         sal_uInt32  nBufLen = 1;
 320         sal_uInt8   *pBuffer = new sal_uInt8[ nBufLen ];
 321         memset(pBuffer, 0, nBufLen);
 322
 323         Statistics aStat;
 324
 325         CPPUNIT_ASSERT_MESSAGE("memset failed", pBuffer[0] == 0);
 326
 327         int nCount = 0;
 328
 329         int nCountMax = 1000000;
 330         for(nCount = 0;nCount < nCountMax; ++nCount)                  // run 100000000 through getBytes(...)
 331         {
 332             /* rtlRandomError aError = */ rtl_random_getBytes(aPool, pBuffer, nBufLen);
 333             /* CPPUNIT_ASSERT_MESSAGE("wrong parameter", aError == rtl_Random_E_None); */
 334
 335             aStat.addValue(pBuffer[0], 1);
 336         }
 337
 338         aStat.build(nCountMax);
 339         aStat.print();
 340
 341         CPPUNIT_ASSERT_MESSAGE("deviation should be less average", aStat.getMaxDeviation() < aStat.getAverage());
 342
 343         rtl_random_destroyPool(aPool);
 344         delete [] pBuffer;
 345     }
 346
 347     void getBytes_003_1()
 348     {
 349         rtlRandomPool aPool = rtl_random_createPool();
 350
 351         sal_uInt32  nBufLen = 256;
 352         sal_uInt8   *pBuffer = new sal_uInt8[ nBufLen ];
 353         memset(pBuffer, 0, nBufLen);
 354
 355         Statistics aStat;
 356
 357         CPPUNIT_ASSERT_MESSAGE("memset failed", pBuffer[0] == 0);
 358
 359         int nCount = 0;
 360
 361         int nCountMax = 10000;
 362         for(nCount = 0;nCount < nCountMax; ++nCount)                  // run 100000000 through getBytes(...)
 363         {
 364             /* rtlRandomError aError = */ rtl_random_getBytes(aPool, pBuffer, nBufLen);
 365             // CPPUNIT_ASSERT_MESSAGE("wrong parameter", aError == rtl_Random_E_None);
 366
 367             for (sal_uInt32 i=0;i<nBufLen;++i)
 368                 aStat.addValue(pBuffer[i], 1);
 369         }
 370
 371         aStat.build(nCountMax * nBufLen);
 372         aStat.print();
 373
 374         CPPUNIT_ASSERT_MESSAGE("deviation should be less average", aStat.getMaxDeviation() < aStat.getAverage());
 375
 376         rtl_random_destroyPool(aPool);
 377         delete [] pBuffer;
 378     }
 379
 380     // Change the following lines only, if you add, remove or rename
 381     // member functions of the current class,
 382     // because these macros are need by auto register mechanism.
 383
 384     CPPUNIT_TEST_SUITE(getBytes);
 385     CPPUNIT_TEST(getBytes_000);
 386     CPPUNIT_TEST(getBytes_001);
 387     CPPUNIT_TEST(getBytes_002);
 388     CPPUNIT_TEST(getBytes_003);
 389     CPPUNIT_TEST(getBytes_003_1);
 390     CPPUNIT_TEST_SUITE_END();
 391 }; // class getBytes
 392
 393 CPPUNIT_TEST_SUITE_REGISTRATION(rtl_random::createPool);
 394 CPPUNIT_TEST_SUITE_REGISTRATION(rtl_random::destroyPool);
 395 CPPUNIT_TEST_SUITE_REGISTRATION(rtl_random::addBytes);
 396 CPPUNIT_TEST_SUITE_REGISTRATION(rtl_random::getBytes);
 397 } // namespace rtl_random
 398
 399 CPPUNIT_PLUGIN_IMPLEMENT();
 400
 401 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */