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#include <vector>
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#include <algorithm>
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#include <functional>
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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 NthElemTest : public CPPUNIT_NS::TestCase
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{
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CPPUNIT_TEST_SUITE(NthElemTest);
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CPPUNIT_TEST(nthelem0);
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CPPUNIT_TEST(nthelem1);
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CPPUNIT_TEST(nthelem2);
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CPPUNIT_TEST_SUITE_END();
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protected:
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void nthelem0();
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void nthelem1();
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void nthelem2();
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};
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CPPUNIT_TEST_SUITE_REGISTRATION(NthElemTest);
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//
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// tests implementation
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//
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void NthElemTest::nthelem0()
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{
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int numbers[7] = { 5, 2, 4, 1, 0, 3 ,77};
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nth_element(numbers, numbers + 3, numbers + 6);
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CPPUNIT_ASSERT(numbers[0]==1);
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CPPUNIT_ASSERT(numbers[1]==0);
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CPPUNIT_ASSERT(numbers[2]==2);
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CPPUNIT_ASSERT(numbers[3]==3);
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CPPUNIT_ASSERT(numbers[4]==4);
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CPPUNIT_ASSERT(numbers[5]==5);
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}
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void NthElemTest::nthelem1()
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{
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//6 8 5 1 7 4 1 5 2 6
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//1 1 4 2 5 5 6 7 8 6
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int numbers[10] = { 6, 8, 5, 1, 7, 4, 1, 5, 2, 6 };
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vector <int> v1(numbers, numbers+10);
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nth_element(v1.begin(), v1.begin() + v1.size() / 2, v1.end());
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CPPUNIT_ASSERT(v1[0]==1);
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CPPUNIT_ASSERT(v1[1]==1);
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CPPUNIT_ASSERT(v1[2]==4);
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CPPUNIT_ASSERT(v1[3]==2);
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CPPUNIT_ASSERT(v1[4]==5);
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CPPUNIT_ASSERT(v1[5]==5);
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CPPUNIT_ASSERT(v1[6]==6);
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CPPUNIT_ASSERT(v1[7]==7);
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CPPUNIT_ASSERT(v1[8]==8);
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CPPUNIT_ASSERT(v1[9]==6);
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}
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void NthElemTest::nthelem2()
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{
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//4 5 4 2 1 7 4 3 1 6
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//6 7 4 4 5 4 3 2 1 1
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int numbers[10] = { 4, 5, 4, 2, 1, 7, 4, 3, 1, 6 };
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vector <int> v1(numbers, numbers+10);
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nth_element(v1.begin(), v1.begin() + v1.size() / 2, v1.end(), greater<int>());
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CPPUNIT_ASSERT(v1[0]==6);
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CPPUNIT_ASSERT(v1[1]==7);
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CPPUNIT_ASSERT(v1[2]==4);
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CPPUNIT_ASSERT(v1[3]==4);
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CPPUNIT_ASSERT(v1[4]==5);
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CPPUNIT_ASSERT(v1[5]==4);
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CPPUNIT_ASSERT(v1[6]==3);
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CPPUNIT_ASSERT(v1[7]==2);
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CPPUNIT_ASSERT(v1[8]==1);
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CPPUNIT_ASSERT(v1[9]==1);
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}
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