tools/qa/cppunit/test_bigint.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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  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 <limits>
  21 #include <cppunit/TestFixture.h>
  22 #include <cppunit/extensions/HelperMacros.h>
  23
  24 #include <rtl/math.hxx>
  25
  26 #include <tools/bigint.hxx>
  27
  28 namespace tools
  29 {
  30
  31 class BigIntTest : public CppUnit::TestFixture
  32 {
  33 public:
  34 #if SAL_TYPES_SIZEOFLONG < SAL_TYPES_SIZEOFLONGLONG
  35     void testConstructionFromLongLong();
  36 #endif
  37
  38     CPPUNIT_TEST_SUITE(BigIntTest);
  39 #if SAL_TYPES_SIZEOFLONG < SAL_TYPES_SIZEOFLONGLONG
  40     CPPUNIT_TEST(testConstructionFromLongLong);
  41 #endif
  42     CPPUNIT_TEST_SUITE_END();
  43 };
  44
  45 #if SAL_TYPES_SIZEOFLONG < SAL_TYPES_SIZEOFLONGLONG
  46 void BigIntTest::testConstructionFromLongLong()
  47 {
  48     // small positive number
  49     {
  50         BigInt bi(static_cast<sal_Int64>(42));
  51         CPPUNIT_ASSERT(bi.IsSet());
  52         CPPUNIT_ASSERT(!bi.IsZero());
  53         CPPUNIT_ASSERT(!bi.IsNeg());
  54         CPPUNIT_ASSERT(bi.IsLong());
  55         CPPUNIT_ASSERT_EQUAL(42L, static_cast<long>(bi));
  56     }
  57
  58     // small negative number
  59     {
  60         BigInt bi(static_cast<sal_Int64>(-42));
  61         CPPUNIT_ASSERT(bi.IsSet());
  62         CPPUNIT_ASSERT(!bi.IsZero());
  63         CPPUNIT_ASSERT(bi.IsNeg());
  64         CPPUNIT_ASSERT(bi.IsLong());
  65         CPPUNIT_ASSERT_EQUAL(-42L, static_cast<long>(bi));
  66     }
  67
  68     // positive number just fitting to long
  69     {
  70         BigInt bi(static_cast<sal_Int64>(std::numeric_limits<long>::max()));
  71         CPPUNIT_ASSERT(bi.IsSet());
  72         CPPUNIT_ASSERT(!bi.IsZero());
  73         CPPUNIT_ASSERT(!bi.IsNeg());
  74         CPPUNIT_ASSERT(bi.IsLong());
  75         CPPUNIT_ASSERT_EQUAL(std::numeric_limits<long>::max(), static_cast<long>(bi));
  76     }
  77
  78     // negative number just fitting to long
  79     {
  80         BigInt bi(static_cast<sal_Int64>(std::numeric_limits<long>::min()));
  81         CPPUNIT_ASSERT(bi.IsSet());
  82         CPPUNIT_ASSERT(!bi.IsZero());
  83         CPPUNIT_ASSERT(bi.IsNeg());
  84         CPPUNIT_ASSERT(bi.IsLong());
  85         CPPUNIT_ASSERT_EQUAL(std::numeric_limits<long>::min(), static_cast<long>(bi));
  86     }
  87
  88     // positive number not fitting to long
  89     {
  90         BigInt bi(static_cast<sal_Int64>(std::numeric_limits<long>::max()) + static_cast<sal_Int64>(1));
  91         CPPUNIT_ASSERT(bi.IsSet());
  92         CPPUNIT_ASSERT(!bi.IsZero());
  93         CPPUNIT_ASSERT(!bi.IsNeg());
  94         CPPUNIT_ASSERT(!bi.IsLong());
  95     }
  96
  97     // negative number not fitting to long
  98     {
  99         BigInt bi(static_cast<sal_Int64>(std::numeric_limits<long>::min()) - static_cast<sal_Int64>(1));
 100         CPPUNIT_ASSERT(bi.IsSet());
 101         CPPUNIT_ASSERT(!bi.IsZero());
 102         CPPUNIT_ASSERT(bi.IsNeg());
 103         CPPUNIT_ASSERT(!bi.IsLong());
 104     }
 105 }
 106 #endif
 107
 108 CPPUNIT_TEST_SUITE_REGISTRATION(BigIntTest);
 109
 110 }
 111
 112 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */