genericopenlibs/cppstdlib/stl/test/unit/rndshf_test.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 16 Apr 2010 16:46:38 +0300
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permissions -rw-r--r--
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/*
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* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: 
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*
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*/
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#include <numeric>
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#include <vector>
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#include <algorithm>
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#include "iota.h"
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#include "cppunit/cppunit_proxy.h"
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#if !defined (STLPORT) || defined(_STLP_USE_NAMESPACES)
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using namespace std;
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#endif
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//
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// TestCase class
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//
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class RndShuffleTest : public CPPUNIT_NS::TestCase
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{
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  class MyRandomGenerator
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  {
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    public:
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      unsigned long operator()(unsigned long n_)
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        {
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        return rand() % n_;
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        }
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  };
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  CPPUNIT_TEST_SUITE(RndShuffleTest);
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  CPPUNIT_TEST(rndshuf0);
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  CPPUNIT_TEST(rndshuf2);
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  CPPUNIT_TEST_SUITE_END();
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protected:
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  void rndshuf0();
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  void rndshuf2();
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};
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CPPUNIT_TEST_SUITE_REGISTRATION(RndShuffleTest);
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//
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// tests implementation
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//
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void RndShuffleTest::rndshuf0()
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{
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  int numbers[6] = { 1, 2, 3, 4, 5, 6 };
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  random_shuffle(numbers, numbers + 6);
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  CPPUNIT_ASSERT(count(numbers, numbers+6, 1)==1);
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  CPPUNIT_ASSERT(count(numbers, numbers+6, 2)==1);
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  CPPUNIT_ASSERT(count(numbers, numbers+6, 3)==1);
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  CPPUNIT_ASSERT(count(numbers, numbers+6, 4)==1);
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  CPPUNIT_ASSERT(count(numbers, numbers+6, 5)==1);
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  CPPUNIT_ASSERT(count(numbers, numbers+6, 6)==1);
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}
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void RndShuffleTest::rndshuf2()
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{
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  vector <int> v1(10);
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  __iota(v1.begin(), v1.end(), 0);
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  MyRandomGenerator r;
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  for(int i = 0; i < 3; i++)
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  {
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    random_shuffle(v1.begin(), v1.end(), r);
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    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 0)==1);
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    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 1)==1);
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    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 2)==1);
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    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 3)==1);
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    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 4)==1);
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    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 5)==1);
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    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 6)==1);
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    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 7)==1);
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    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 8)==1);
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    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 9)==1);
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  }
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}