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       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/math.hxx>
      26             : #include <tools/fract.hxx>
      27             : 
      28             : namespace tools
      29             : {
      30             : 
      31          18 : class FractionTest : public CppUnit::TestFixture
      32             : {
      33             : public:
      34             : 
      35           2 :     void testFraction()
      36             :     {
      37           2 :         const Fraction aFract(1082130431,1073741824);
      38           4 :         CPPUNIT_ASSERT_MESSAGE( "Fraction #1 not approximately equal to 1.007812499068677",
      39           2 :                                 rtl::math::approxEqual((double)aFract,1.007812499068677) );
      40             : 
      41           2 :         Fraction aFract2( aFract );
      42           2 :         aFract2.ReduceInaccurate(8);
      43           4 :         CPPUNIT_ASSERT_MESSAGE( "Fraction #2 not 1",
      44             :                                 aFract2.GetNumerator() == 1 &&
      45           2 :                                 aFract2.GetDenominator() == 1 );
      46             : 
      47           2 :         Fraction aFract3( 0x7AAAAAAA, 0x35555555 );
      48           4 :         CPPUNIT_ASSERT_MESSAGE( "Fraction #3 cancellation wrong",
      49             :                                 aFract3.GetNumerator() == 0x7AAAAAAA &&
      50           2 :                                 aFract3.GetDenominator() == 0x35555555 );
      51           2 :         aFract3.ReduceInaccurate(30);
      52           4 :         CPPUNIT_ASSERT_MESSAGE( "Fraction #3 ReduceInaccurate errorneously cut precision",
      53             :                                 aFract3.GetNumerator() == 0x7AAAAAAA &&
      54           2 :                                 aFract3.GetDenominator() == 0x35555555 );
      55             : 
      56           2 :         aFract3.ReduceInaccurate(29);
      57           4 :         CPPUNIT_ASSERT_MESSAGE( "Fraction #3 reduce to 29 bits failed",
      58             :                                 aFract3.GetNumerator() == 0x3D555555 &&
      59           2 :                                 aFract3.GetDenominator() == 0x1AAAAAAA );
      60             : 
      61           2 :         aFract3.ReduceInaccurate(9);
      62           4 :         CPPUNIT_ASSERT_MESSAGE( "Fraction #3 reduce to 9 bits failed",
      63             :                                 aFract3.GetNumerator() == 0x0147 &&
      64           2 :                                 aFract3.GetDenominator() == 0x008E );
      65             : 
      66           2 :         aFract3.ReduceInaccurate(1);
      67           4 :         CPPUNIT_ASSERT_MESSAGE( "Fraction #3 reduce to 1 bit failed",
      68             :                                 aFract3.GetNumerator() == 2 &&
      69           2 :                                 aFract3.GetDenominator() == 1 );
      70             : 
      71           2 :         aFract3.ReduceInaccurate(0);
      72           4 :         CPPUNIT_ASSERT_MESSAGE( "Fraction #3 reduce to 0 bits failed",
      73             :                                 aFract3.GetNumerator() == 2 &&
      74           2 :                                 aFract3.GetDenominator() == 1 );
      75             : 
      76             : #if SAL_TYPES_SIZEOFLONG == 8
      77           2 :         Fraction aFract4(0x7AAAAAAAAAAAAAAA, 0x3555555555555555);
      78           4 :         CPPUNIT_ASSERT_MESSAGE( "Fraction #4 cancellation wrong",
      79             :                                 aFract4.GetNumerator() == 0x7AAAAAAAAAAAAAAA &&
      80           2 :                                 aFract4.GetDenominator() == 0x3555555555555555 );
      81           2 :         aFract4.ReduceInaccurate(62);
      82           4 :         CPPUNIT_ASSERT_MESSAGE( "Fraction #4 ReduceInaccurate errorneously cut precision",
      83             :                                 aFract4.GetNumerator() == 0x7AAAAAAAAAAAAAAA &&
      84           2 :                                 aFract4.GetDenominator() == 0x3555555555555555 );
      85             : 
      86           2 :         aFract4.ReduceInaccurate(61);
      87           4 :         CPPUNIT_ASSERT_MESSAGE( "Fraction #4 ReduceInaccurate reduce to 61 bit failed",
      88             :                                 aFract4.GetNumerator() == 0x3D55555555555555 &&
      89           2 :                                 aFract4.GetDenominator() == 0x1AAAAAAAAAAAAAAA );
      90             : #endif
      91           2 :     }
      92             : 
      93           2 :     void testMinLongDouble() {
      94           2 :         Fraction f(double(SAL_MIN_INT32));
      95           2 :         CPPUNIT_ASSERT_EQUAL(long(SAL_MIN_INT32), f.GetNumerator());
      96           2 :         CPPUNIT_ASSERT_EQUAL(1L, f.GetDenominator());
      97           2 :     }
      98             : 
      99           2 :     void testCreateFromDoubleIn32BitsPlatform() {
     100             :         // This pass in 64 bits but fail in 32 bits
     101           2 :         Fraction f(0.960945);
     102           2 :         CPPUNIT_ASSERT_EQUAL(true, f.IsValid());
     103           2 :     }
     104             : 
     105           4 :     CPPUNIT_TEST_SUITE(FractionTest);
     106           2 :     CPPUNIT_TEST(testFraction);
     107           2 :     CPPUNIT_TEST(testMinLongDouble);
     108           2 :     CPPUNIT_TEST(testCreateFromDoubleIn32BitsPlatform);
     109           4 :     CPPUNIT_TEST_SUITE_END();
     110             : };
     111             : 
     112             : 
     113           2 : CPPUNIT_TEST_SUITE_REGISTRATION(FractionTest);
     114           6 : } // namespace tools
     115             : 
     116             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */