#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 SetUnionTest : public CPPUNIT_NS::TestCase

 {

   CPPUNIT_TEST_SUITE(SetUnionTest);

   CPPUNIT_TEST(setunon0);

   CPPUNIT_TEST(setunon1);

   CPPUNIT_TEST(setunon2);

   CPPUNIT_TEST_SUITE_END();

 protected:

   void setunon0();

   void setunon1();

   void setunon2();

 };

 CPPUNIT_TEST_SUITE_REGISTRATION(SetUnionTest);

 //

 // tests implementation

 //

 void SetUnionTest::setunon0()

 {

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

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

   int result[7] = { 0, 0, 0, 0, 0, 0, 0 };

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

   CPPUNIT_ASSERT(result[0]==10);

   CPPUNIT_ASSERT(result[1]==13);

   CPPUNIT_ASSERT(result[2]==17);

   CPPUNIT_ASSERT(result[3]==18);

   CPPUNIT_ASSERT(result[4]==23);

   CPPUNIT_ASSERT(result[5]==0);

   CPPUNIT_ASSERT(result[6]==0);

 }

 void SetUnionTest::setunon1()

 {

   vector <int> v1(10);

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

   vector <int> v2(10);

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

   vector<int> diff;

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

   CPPUNIT_ASSERT( diff.size() == 17 );

   for (int i = 0; i < 17; ++i) {

     CPPUNIT_ASSERT( diff[i] == i );

   }

 }

 void SetUnionTest::setunon2()

 {

   char* word1 = "ABCDEFGHIJKLMNO";

   char* word2 = "LMNOPQRSTUVWXYZ";

   string diff;

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

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

   CPPUNIT_ASSERT( diff.size() == 26 );

   for (int i = 0; i < 26; ++i) {

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

   }

 }