#include <numeric>

#include <vector>

#include <algorithm>

#include "iota.h"

#include "cppunit/cppunit_proxy.h"

#if !defined (STLPORT) || defined(_STLP_USE_NAMESPACES)

using namespace std;

#endif

//

// TestCase class

//

class RndShuffleTest : public CPPUNIT_NS::TestCase

{

  class MyRandomGenerator

  {

    public:

      unsigned long operator()(unsigned long n_)

        {

        return rand() % n_;

        }

  };

  CPPUNIT_TEST_SUITE(RndShuffleTest);

  CPPUNIT_TEST(rndshuf0);

  CPPUNIT_TEST(rndshuf2);

  CPPUNIT_TEST_SUITE_END();

protected:

  void rndshuf0();

  void rndshuf2();

};

CPPUNIT_TEST_SUITE_REGISTRATION(RndShuffleTest);

//

// tests implementation

//

void RndShuffleTest::rndshuf0()

{

  int numbers[6] = { 1, 2, 3, 4, 5, 6 };

  random_shuffle(numbers, numbers + 6);

  CPPUNIT_ASSERT(count(numbers, numbers+6, 1)==1);

  CPPUNIT_ASSERT(count(numbers, numbers+6, 2)==1);

  CPPUNIT_ASSERT(count(numbers, numbers+6, 3)==1);

  CPPUNIT_ASSERT(count(numbers, numbers+6, 4)==1);

  CPPUNIT_ASSERT(count(numbers, numbers+6, 5)==1);

  CPPUNIT_ASSERT(count(numbers, numbers+6, 6)==1);

}

void RndShuffleTest::rndshuf2()

{

  vector <int> v1(10);

  __iota(v1.begin(), v1.end(), 0);

  MyRandomGenerator r;

  for(int i = 0; i < 3; i++)

  {

    random_shuffle(v1.begin(), v1.end(), r);

    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 0)==1);

    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 1)==1);

    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 2)==1);

    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 3)==1);

    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 4)==1);

    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 5)==1);

    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 6)==1);

    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 7)==1);

    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 8)==1);

    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 9)==1);

  }

}