tools/qa/cppunit/test_fract.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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  18  */
  19
  20 #include <sal/types.h>
  21 #include <cppunit/TestFixture.h>
  22 #include <cppunit/extensions/HelperMacros.h>
  23
  24 #include <rtl/math.hxx>
  25 #include <tools/fract.hxx>
  26
  27 namespace tools
  28 {
  29
  30 class FractionTest : public CppUnit::TestFixture
  31 {
  32 public:
  33
  34     void testFraction()
  35     {
  36         const Fraction aFract(1082130431,1073741824);
  37         CPPUNIT_ASSERT_MESSAGE( "Fraction #1 not approximately equal to 1.007812499068677",
  38                                 rtl::math::approxEqual(static_cast<double>(aFract),1.007812499068677) );
  39
  40         Fraction aFract2( aFract );
  41         aFract2.ReduceInaccurate(8);
  42         CPPUNIT_ASSERT_MESSAGE( "Fraction #2 not 1",
  43                                 aFract2.GetNumerator() == 1 &&
  44                                 aFract2.GetDenominator() == 1 );
  45
  46         Fraction aFract3( 0x7AAAAAAA, 0x35555555 );
  47         CPPUNIT_ASSERT_MESSAGE( "Fraction #3 cancellation wrong",
  48                                 aFract3.GetNumerator() == 0x7AAAAAAA &&
  49                                 aFract3.GetDenominator() == 0x35555555 );
  50         aFract3.ReduceInaccurate(30);
  51         CPPUNIT_ASSERT_MESSAGE( "Fraction #3 ReduceInaccurate erroneously cut precision",
  52                                 aFract3.GetNumerator() == 0x7AAAAAAA &&
  53                                 aFract3.GetDenominator() == 0x35555555 );
  54
  55         aFract3.ReduceInaccurate(29);
  56         CPPUNIT_ASSERT_MESSAGE( "Fraction #3 reduce to 29 bits failed",
  57                                 aFract3.GetNumerator() == 0x3D555555 &&
  58                                 aFract3.GetDenominator() == 0x1AAAAAAA );
  59
  60         aFract3.ReduceInaccurate(9);
  61         CPPUNIT_ASSERT_MESSAGE( "Fraction #3 reduce to 9 bits failed",
  62                                 aFract3.GetNumerator() == 0x0147 &&
  63                                 aFract3.GetDenominator() == 0x008E );
  64
  65         aFract3.ReduceInaccurate(1);
  66         CPPUNIT_ASSERT_MESSAGE( "Fraction #3 reduce to 1 bit failed",
  67                                 aFract3.GetNumerator() == 2 &&
  68                                 aFract3.GetDenominator() == 1 );
  69
  70         aFract3.ReduceInaccurate(0);
  71         CPPUNIT_ASSERT_MESSAGE( "Fraction #3 reduce to 0 bits failed",
  72                                 aFract3.GetNumerator() == 2 &&
  73                                 aFract3.GetDenominator() == 1 );
  74
  75     }
  76
  77     void testMinLongDouble() {
  78         Fraction f(double(SAL_MIN_INT32));
  79         CPPUNIT_ASSERT_EQUAL(SAL_MIN_INT32, f.GetNumerator());
  80         CPPUNIT_ASSERT_EQUAL(sal_Int32(1), f.GetDenominator());
  81     }
  82
  83     void testCreateFromDoubleIn32BitsPlatform() {
  84         // This pass in 64 bits but fail in 32 bits
  85         Fraction f(0.960945);
  86         CPPUNIT_ASSERT_EQUAL(true, f.IsValid());
  87     }
  88
  89     CPPUNIT_TEST_SUITE(FractionTest);
  90     CPPUNIT_TEST(testFraction);
  91     CPPUNIT_TEST(testMinLongDouble);
  92     CPPUNIT_TEST(testCreateFromDoubleIn32BitsPlatform);
  93     CPPUNIT_TEST_SUITE_END();
  94 };
  95
  96
  97 CPPUNIT_TEST_SUITE_REGISTRATION(FractionTest);
  98 } // namespace tools
  99
 100 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */