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