sal/qa/rtl/crc32/rtl_crc32.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 <sal/types.h>
  21 #include <cppunit/TestFixture.h>
  22 #include <cppunit/extensions/HelperMacros.h>
  23 #include <cppunit/plugin/TestPlugIn.h>
  24
  25 #include <rtl/crc.h>
  26
  27 namespace rtl_CRC32
  28 {
  29
  30 class test : public CppUnit::TestFixture
  31 {
  32 public:
  33
  34     // insert your test code here.
  35     void rtl_crc32_001()
  36     {
  37         // this is demonstration code
  38         // CPPUNIT_ASSERT_MESSAGE("a message", 1 == 1);
  39
  40         sal_uInt32 nCRC = 0;
  41
  42         char buf[] = {0};
  43         int num = 0;
  44
  45         nCRC = rtl_crc32(nCRC, buf, num);
  46
  47         CPPUNIT_ASSERT_EQUAL_MESSAGE("empty crc buffer", static_cast<sal_uInt32>(0), nCRC);
  48     }
  49
  50     void rtl_crc32_002()
  51     {
  52         sal_uInt32 nCRC = 0;
  53
  54         char buf[] = {0,0};
  55         int num = sizeof(buf);
  56
  57         nCRC = rtl_crc32(nCRC, buf, num);
  58
  59         CPPUNIT_ASSERT_MESSAGE("buffer contain 2 empty bytes, crc is zero", nCRC != 0);
  60     }
  61
  62     void rtl_crc32_002_1()
  63     {
  64         sal_uInt32 nCRC = 0;
  65
  66         char buf[] = {0,0,0};
  67         int num = sizeof(buf);
  68
  69         nCRC = rtl_crc32(nCRC, buf, num);
  70
  71         CPPUNIT_ASSERT_MESSAGE("buffer contain 3 empty bytes, crc is zero", nCRC != 0);
  72     }
  73
  74     /**
  75      * crc32 check:
  76      * Build checksum on two buffers with same size but different content,
  77      * the result (crc32 checksum) must differ
  78      */
  79
  80     void rtl_crc32_003()
  81     {
  82         sal_uInt32 nCRC1 = 0;
  83         char buf1[] = {2};
  84         int num1 = sizeof(buf1);
  85
  86         nCRC1 = rtl_crc32(nCRC1, buf1, num1);
  87
  88         sal_uInt32 nCRC2 = 0;
  89         char buf2[] = {3};
  90         int num2 = sizeof(buf2);
  91
  92         nCRC2 = rtl_crc32(nCRC2, buf2, num2);
  93
  94         CPPUNIT_ASSERT_MESSAGE("checksum should differ for buf1 and buf2", nCRC1 != nCRC2);
  95     }
  96
  97     /** check if the crc32 only use as much values, as given
  98      *
  99      */
 100     void rtl_crc32_003_1()
 101     {
 102         sal_uInt32 nCRC1 = 0;
 103         char buf1[] = {2,1};
 104         int num1 = sizeof(buf1) - 1;
 105
 106         nCRC1 = rtl_crc32(nCRC1, buf1, num1);
 107
 108         sal_uInt32 nCRC2 = 0;
 109         char buf2[] = {2,2};
 110         int num2 = sizeof(buf2) - 1;
 111
 112         nCRC2 = rtl_crc32(nCRC2, buf2, num2);
 113
 114         CPPUNIT_ASSERT_EQUAL_MESSAGE("checksum leave it's bounds", nCRC2, nCRC1);
 115     }
 116
 117     /** check if the crc32 differ at same content in reverse order
 118      *
 119      */
 120     void rtl_crc32_003_2()
 121     {
 122         sal_uInt32 nCRC1 = 0;
 123         char buf1[] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20};
 124         int num1 = sizeof(buf1);
 125
 126         nCRC1 = rtl_crc32(nCRC1, buf1, num1);
 127
 128         sal_uInt32 nCRC2 = 0;
 129         char buf2[] = {20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0};
 130         int num2 = sizeof(buf2);
 131
 132         nCRC2 = rtl_crc32(nCRC2, buf2, num2);
 133
 134         CPPUNIT_ASSERT_MESSAGE("checksum should differ", nCRC1 != nCRC2);
 135     }
 136
 137     // Change the following lines only, if you add, remove or rename
 138     // member functions of the current class,
 139     // because these macros are need by auto register mechanism.
 140
 141     CPPUNIT_TEST_SUITE(test);
 142     CPPUNIT_TEST(rtl_crc32_001);
 143     CPPUNIT_TEST(rtl_crc32_002);
 144     CPPUNIT_TEST(rtl_crc32_002_1);
 145     CPPUNIT_TEST(rtl_crc32_003);
 146     CPPUNIT_TEST(rtl_crc32_003_1);
 147     CPPUNIT_TEST(rtl_crc32_003_2);
 148     CPPUNIT_TEST_SUITE_END();
 149 }; // class test
 150
 151 CPPUNIT_TEST_SUITE_REGISTRATION(rtl_CRC32::test);
 152 } // namespace rtl_CRC32
 153
 154 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */