#include <numeric>

#include <string>

#include <iterator>

#include <vector>

#include <algorithm>

#include <functional>

#include "iota.h"

#include "cppunit/cppunit_proxy.h"

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

using namespace std;

#endif

//

// TestCase class

//

class SetDifferenceTest : public CPPUNIT_NS::TestCase

{

  CPPUNIT_TEST_SUITE(SetDifferenceTest);

  CPPUNIT_TEST(setdiff0);

  CPPUNIT_TEST(setdiff1);

  CPPUNIT_TEST(setdiff2);

  CPPUNIT_TEST(setsymd0);

  CPPUNIT_TEST(setsymd1);

  CPPUNIT_TEST(setsymd2);

  CPPUNIT_TEST_SUITE_END();

protected:

  void setdiff0();

  void setdiff1();

  void setdiff2();

  void setsymd0();

  void setsymd1();

  void setsymd2();

};

CPPUNIT_TEST_SUITE_REGISTRATION(SetDifferenceTest);

//

// tests implementation

//

void SetDifferenceTest::setsymd0()

{

  int v1[3] = { 13, 18, 23 };

  int v2[4] = { 10, 13, 17, 23 };

  int result[4] = { 0, 0, 0, 0 };

  set_symmetric_difference((int*)v1, (int*)v1 + 3, (int*)v2, (int*)v2 + 4, (int*)result);

  CPPUNIT_ASSERT(result[0]==10);

  CPPUNIT_ASSERT(result[1]==17);

  CPPUNIT_ASSERT(result[2]==18);

  CPPUNIT_ASSERT(result[3]==0);

}

void SetDifferenceTest::setsymd1()

{

  vector<int> v1(10);

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

  vector<int> v2(10);

  __iota(v2.begin(), v2.end(), 7);

  vector<int> diff;

  set_symmetric_difference(v1.begin(), v1.end(), v2.begin(), v2.end(), back_inserter(diff));

  CPPUNIT_ASSERT( diff.size() == 14 );

  int int_res[] = {0, 1, 2, 3, 4, 5, 6, 10, 11, 12, 13, 14, 15, 16};

  for (int i = 0; i < 14; ++i) {

    CPPUNIT_ASSERT( diff[i] == int_res[i] );

  }

}

void SetDifferenceTest::setsymd2()

{

  char* word1 = "ABCDEFGHIJKLMNO";

  char* word2 = "LMNOPQRSTUVWXYZ";

  string diff;

  set_symmetric_difference(word1, word1 + ::strlen(word1), word2, word2 + ::strlen(word2),

                           back_inserter(diff), less<char>());

  CPPUNIT_ASSERT( diff.size() == 22 );

  char char_res[] = "ABCDEFGHIJKPQRSTUVWXYZ";

  for (int i = 0; i < 22; ++i) {

    CPPUNIT_ASSERT( diff[i] == char_res[i] );

  }

}

void SetDifferenceTest::setdiff0()

{

  int v1[3] = { 13, 18, 23 };

  int v2[4] = { 10, 13, 17, 23 };

  int result[4] = { 0, 0, 0, 0 };

  //18 0 0 0

  //10 17 23 0

  set_difference((int*)v1, (int*)v1 + 3, (int*)v2, (int*)v2 + 4, (int*)result);

  CPPUNIT_ASSERT( result[0] == 18 );

  CPPUNIT_ASSERT( result[1] == 0 );

  CPPUNIT_ASSERT( result[2] == 0 );

  CPPUNIT_ASSERT( result[3] == 0 );

  set_difference((int*)v2, (int*)v2 + 4, (int*)v1, (int*)v1 + 2, (int*)result);

  CPPUNIT_ASSERT( result[0] == 10 );

  CPPUNIT_ASSERT( result[1] == 17 );

  CPPUNIT_ASSERT( result[2] == 23 );

  CPPUNIT_ASSERT( result[3] == 0 );

}

void SetDifferenceTest::setdiff1()

{

  vector<int> v1(10);

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

  vector<int> v2(10);

  __iota(v2.begin(), v2.end(), 7);

  vector<int> diff;

  set_difference(v1.begin(), v1.end(), v2.begin(), v2.end(), back_inserter(diff));

  CPPUNIT_ASSERT( diff.size() == 7 );

  for (int i = 0; i < 7; ++i) {

    CPPUNIT_ASSERT( diff[i] == i );

  }

}

void SetDifferenceTest::setdiff2()

{

  char* word1 = "ABCDEFGHIJKLMNO";

  char* word2 = "LMNOPQRSTUVWXYZ";

  string diff;

  set_difference(word1, word1 + ::strlen(word1), word2, word2 + ::strlen(word2), back_inserter(diff), less<char>());

  CPPUNIT_ASSERT( diff.size() == 11 );

  for (int i = 0; i < 11; ++i) {

    CPPUNIT_ASSERT( diff[i] == ('A' + i) );

  }

}