vector_test.cpp

Go to the documentation of this file.

//Has to be first for StackAllocator swap overload to be taken
//into account (at least using GCC 4.0.1)
#include "stack_allocator.h"

#include <vector>
#include <algorithm>
#if !defined (STLPORT) || defined (_STLP_USE_EXCEPTIONS)
# include <stdexcept>
#endif

#include "cppunit/cppunit_proxy.h"

#if !defined (STLPORT) || defined(_STLP_USE_NAMESPACES)
using namespace std;
#endif

//
// TestCase class
//
class VectorTest : public CPPUNIT_NS::TestCase
{
  CPPUNIT_TEST_SUITE(VectorTest);
  CPPUNIT_TEST(vec_test_1);
  CPPUNIT_TEST(vec_test_2);
  CPPUNIT_TEST(vec_test_3);
  CPPUNIT_TEST(vec_test_4);
  CPPUNIT_TEST(vec_test_5);
  CPPUNIT_TEST(vec_test_6);
  CPPUNIT_TEST(vec_test_7);
  CPPUNIT_TEST(capacity);
  CPPUNIT_TEST(at);
  CPPUNIT_TEST(pointer);
  CPPUNIT_TEST(auto_ref);
  CPPUNIT_TEST(allocator_with_state);
  CPPUNIT_TEST(iterators);
#if defined (STLPORT) && defined (_STLP_NO_MEMBER_TEMPLATES)
  CPPUNIT_IGNORE;
#endif
  CPPUNIT_TEST(optimizations_check);
  CPPUNIT_TEST(assign_check);
  CPPUNIT_STOP_IGNORE;
  CPPUNIT_TEST(ebo);
  CPPUNIT_TEST_SUITE_END();

protected:
  void vec_test_1();
  void vec_test_2();
  void vec_test_3();
  void vec_test_4();
  void vec_test_5();
  void vec_test_6();
  void vec_test_7();
  void capacity();
  void at();
  void pointer();
  void auto_ref();
  void allocator_with_state();
  void iterators();
  void optimizations_check();
  void assign_check();
  void ebo();
};

CPPUNIT_TEST_SUITE_REGISTRATION(VectorTest);

//
// tests implementation
//
void VectorTest::vec_test_1()
{
  vector<int> v1; // Empty vector of integers.

  CPPUNIT_ASSERT( v1.empty() == true );
  CPPUNIT_ASSERT( v1.size() == 0 );

  // CPPUNIT_ASSERT( v1.max_size() == INT_MAX / sizeof(int) );
  // cout << "max_size = " << v1.max_size() << endl;
  v1.push_back(42); // Add an integer to the vector.

  CPPUNIT_ASSERT( v1.size() == 1 );

  CPPUNIT_ASSERT( v1[0] == 42 );

  {
    vector<vector<int> > vect(10);
    vector<vector<int> >::iterator it(vect.begin()), end(vect.end());
    for (; it != end; ++it) {
      CPPUNIT_ASSERT( (*it).empty() );
      CPPUNIT_ASSERT( (*it).size() == 0 );
      CPPUNIT_ASSERT( (*it).capacity() == 0 );
      CPPUNIT_ASSERT( (*it).begin() == (*it).end() );
    }
  }
}

void VectorTest::vec_test_2()
{
  vector<double> v1; // Empty vector of doubles.
  v1.push_back(32.1);
  v1.push_back(40.5);
  vector<double> v2; // Another empty vector of doubles.
  v2.push_back(3.56);

  CPPUNIT_ASSERT( v1.size() == 2 );
  CPPUNIT_ASSERT( v1[0] == 32.1 );
  CPPUNIT_ASSERT( v1[1] == 40.5 );

  CPPUNIT_ASSERT( v2.size() == 1 );
  CPPUNIT_ASSERT( v2[0] == 3.56 );
  size_t v1Cap = v1.capacity();
  size_t v2Cap = v2.capacity();

  v1.swap(v2); // Swap the vector's contents.

  CPPUNIT_ASSERT( v1.size() == 1 );
  CPPUNIT_ASSERT( v1.capacity() == v2Cap );
  CPPUNIT_ASSERT( v1[0] == 3.56 );

  CPPUNIT_ASSERT( v2.size() == 2 );
  CPPUNIT_ASSERT( v2.capacity() == v1Cap );
  CPPUNIT_ASSERT( v2[0] == 32.1 );
  CPPUNIT_ASSERT( v2[1] == 40.5 );

  v2 = v1; // Assign one vector to another.

  CPPUNIT_ASSERT( v2.size() == 1 );
  CPPUNIT_ASSERT( v2[0] == 3.56 );
}

void VectorTest::vec_test_3()
{
  typedef vector<char> vec_type;

  vec_type v1; // Empty vector of characters.
  v1.push_back('h');
  v1.push_back('i');

  CPPUNIT_ASSERT( v1.size() == 2 );
  CPPUNIT_ASSERT( v1[0] == 'h' );
  CPPUNIT_ASSERT( v1[1] == 'i' );

  vec_type v2(v1.begin(), v1.end());
  v2[1] = 'o'; // Replace second character.

  CPPUNIT_ASSERT( v2.size() == 2 );
  CPPUNIT_ASSERT( v2[0] == 'h' );
  CPPUNIT_ASSERT( v2[1] == 'o' );

  CPPUNIT_ASSERT( (v1 == v2) == false );

  CPPUNIT_ASSERT( (v1 < v2) == true );
}

void VectorTest::vec_test_4()
{
  vector<int> v(4);

  v[0] = 1;
  v[1] = 4;
  v[2] = 9;
  v[3] = 16;

  CPPUNIT_ASSERT( v.front() == 1 );
  CPPUNIT_ASSERT( v.back() == 16 );

  v.push_back(25);

  CPPUNIT_ASSERT( v.back() == 25 );
  CPPUNIT_ASSERT( v.size() == 5 );

  v.pop_back();

  CPPUNIT_ASSERT( v.back() == 16 );
  CPPUNIT_ASSERT( v.size() == 4 );
}

void VectorTest::vec_test_5()
{
  int array [] = { 1, 4, 9, 16 };

  vector<int> v(array, array + 4);

  CPPUNIT_ASSERT( v.size() == 4 );

  CPPUNIT_ASSERT( v[0] == 1 );
  CPPUNIT_ASSERT( v[1] == 4 );
  CPPUNIT_ASSERT( v[2] == 9 );
  CPPUNIT_ASSERT( v[3] == 16 );
}

void VectorTest::vec_test_6()
{
  int array [] = { 1, 4, 9, 16, 25, 36 };

  vector<int> v(array, array + 6);
  vector<int>::iterator vit;

  CPPUNIT_ASSERT( v.size() == 6 );
  CPPUNIT_ASSERT( v[0] == 1 );
  CPPUNIT_ASSERT( v[1] == 4 );
  CPPUNIT_ASSERT( v[2] == 9 );
  CPPUNIT_ASSERT( v[3] == 16 );
  CPPUNIT_ASSERT( v[4] == 25 );
  CPPUNIT_ASSERT( v[5] == 36 );

  vit = v.erase( v.begin() ); // Erase first element.
  CPPUNIT_ASSERT( *vit == 4 );

  CPPUNIT_ASSERT( v.size() == 5 );
  CPPUNIT_ASSERT( v[0] == 4 );
  CPPUNIT_ASSERT( v[1] == 9 );
  CPPUNIT_ASSERT( v[2] == 16 );
  CPPUNIT_ASSERT( v[3] == 25 );
  CPPUNIT_ASSERT( v[4] == 36 );

  vit = v.erase(v.end() - 1); // Erase last element.
  CPPUNIT_ASSERT( vit == v.end() );

  CPPUNIT_ASSERT( v.size() == 4 );
  CPPUNIT_ASSERT( v[0] == 4 );
  CPPUNIT_ASSERT( v[1] == 9 );
  CPPUNIT_ASSERT( v[2] == 16 );
  CPPUNIT_ASSERT( v[3] == 25 );


  v.erase(v.begin() + 1, v.end() - 1); // Erase all but first and last.

  CPPUNIT_ASSERT( v.size() == 2 );
  CPPUNIT_ASSERT( v[0] == 4 );
  CPPUNIT_ASSERT( v[1] == 25 );

}

void VectorTest::vec_test_7()
{
  int array1 [] = { 1, 4, 25 };
  int array2 [] = { 9, 16 };

  vector<int> v(array1, array1 + 3);
  vector<int>::iterator vit;
  vit = v.insert(v.begin(), 0); // Insert before first element.
  CPPUNIT_ASSERT( *vit == 0 );

  vit = v.insert(v.end(), 36);  // Insert after last element.
  CPPUNIT_ASSERT( *vit == 36 );

  CPPUNIT_ASSERT( v.size() == 5 );
  CPPUNIT_ASSERT( v[0] == 0 );
  CPPUNIT_ASSERT( v[1] == 1 );
  CPPUNIT_ASSERT( v[2] == 4 );
  CPPUNIT_ASSERT( v[3] == 25 );
  CPPUNIT_ASSERT( v[4] == 36 );

  // Insert contents of array2 before fourth element.
  v.insert(v.begin() + 3, array2, array2 + 2);

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

  CPPUNIT_ASSERT( v[0] == 0 );
  CPPUNIT_ASSERT( v[1] == 1 );
  CPPUNIT_ASSERT( v[2] == 4 );
  CPPUNIT_ASSERT( v[3] == 9 );
  CPPUNIT_ASSERT( v[4] == 16 );
  CPPUNIT_ASSERT( v[5] == 25 );
  CPPUNIT_ASSERT( v[6] == 36 );

  v.clear();
  CPPUNIT_ASSERT( v.empty() );

  v.insert(v.begin(), 5, 10);
  CPPUNIT_ASSERT( v.size() == 5 );
  CPPUNIT_ASSERT( v[0] == 10 );
  CPPUNIT_ASSERT( v[1] == 10 );
  CPPUNIT_ASSERT( v[2] == 10 );
  CPPUNIT_ASSERT( v[3] == 10 );
  CPPUNIT_ASSERT( v[4] == 10 );

  /*
  {
    vector<float> vf(2.0f, 3.0f);
    CPPUNIT_ASSERT( vf.size() == 2 );
    CPPUNIT_ASSERT( vf.front() == 3.0f );
    CPPUNIT_ASSERT( vf.back() == 3.0f );
  }
  */
}

struct TestStruct
{
  unsigned int a[3];
};

void VectorTest::capacity()
{
  {
    vector<int> v;

    CPPUNIT_ASSERT( v.capacity() == 0 );
    v.push_back(42);
    CPPUNIT_ASSERT( v.capacity() >= 1 );
    v.reserve(5000);
    CPPUNIT_ASSERT( v.capacity() >= 5000 );
  }

  {
    //Test that used to generate an assertion when using __debug_alloc.
    vector<TestStruct> va;
    va.reserve(1);
    va.reserve(2);
  }
}

void VectorTest::at() {
  vector<int> v;
  vector<int> const& cv = v;

  v.push_back(10);
  CPPUNIT_ASSERT( v.at(0) == 10 );
  v.at(0) = 20;
  CPPUNIT_ASSERT( cv.at(0) == 20 );

#if !defined (STLPORT) || defined (_STLP_USE_EXCEPTIONS)
  try {
    v.at(1) = 20;
    CPPUNIT_FAIL;
  }
  catch (out_of_range const&) {
  }
  catch (...) {
    CPPUNIT_FAIL;
  }
#endif
}

void VectorTest::pointer()
{
  vector<int *> v1;
  vector<int *> v2 = v1;
  vector<int *> v3;

  v3.insert( v3.end(), v1.begin(), v1.end() );
}

void VectorTest::auto_ref()
{
  vector<int> ref;
  for (int i = 0; i < 5; ++i) {
    ref.push_back(i);
  }

  vector<vector<int> > v_v_int(1, ref);
  v_v_int.push_back(v_v_int[0]);
  v_v_int.push_back(ref);
  v_v_int.push_back(v_v_int[0]);
  v_v_int.push_back(v_v_int[0]);
  v_v_int.push_back(ref);

  vector<vector<int> >::iterator vvit(v_v_int.begin()), vvitEnd(v_v_int.end());
  for (; vvit != vvitEnd; ++vvit) {
    CPPUNIT_ASSERT( *vvit == ref );
  }

  /*
   * Forbidden by the Standard:
  v_v_int.insert(v_v_int.end(), v_v_int.begin(), v_v_int.end());
  for (vvit = v_v_int.begin(), vvitEnd = v_v_int.end();
       vvit != vvitEnd; ++vvit) {
    CPPUNIT_ASSERT( *vvit == ref );
  }
   */
}

void VectorTest::allocator_with_state()
  {
    char buf1[1024];
    StackAllocator<int> stack1(buf1, buf1 + sizeof(buf1));

    char buf2[1024];
    StackAllocator<int> stack2(buf2, buf2 + sizeof(buf2));

    {
      typedef vector<int, StackAllocator<int> > VectorInt;
      VectorInt vint1(10, 0, stack1);
      VectorInt vint1Cpy(vint1);

      VectorInt vint2(10, 1, stack2);
      VectorInt vint2Cpy(vint2);

      vint1.swap(vint2);

      CPPUNIT_ASSERT( vint1.get_allocator().swaped() );
      CPPUNIT_ASSERT( vint2.get_allocator().swaped() );

      CPPUNIT_ASSERT( vint1 == vint2Cpy );
      CPPUNIT_ASSERT( vint2 == vint1Cpy );
      CPPUNIT_ASSERT( vint1.get_allocator() == stack2 );
      CPPUNIT_ASSERT( vint2.get_allocator() == stack1 );
    }
    CPPUNIT_ASSERT( stack1.ok() );
    CPPUNIT_ASSERT( stack2.ok() );
  }

struct Point {
  int x, y;
};

struct PointEx : public Point {
  PointEx() : builtFromBase(false) {}
  PointEx(const Point&) : builtFromBase(true) {}

  bool builtFromBase;
};

#if defined (STLPORT)
#  if defined (_STLP_USE_NAMESPACES)
namespace std {
#  endif
  _STLP_TEMPLATE_NULL
  struct __type_traits<PointEx> {
    typedef __false_type has_trivial_default_constructor;
    typedef __true_type has_trivial_copy_constructor;
    typedef __true_type has_trivial_assignment_operator;
    typedef __true_type has_trivial_destructor;
    typedef __true_type is_POD_type;
  };
#  if defined (_STLP_USE_NAMESPACES)
}
#  endif
#endif

//This test check that vector implementation do not over optimize
//operation as PointEx copy constructor is trivial
void VectorTest::optimizations_check()
{
#if !defined (STLPORT) || !defined (_STLP_NO_MEMBER_TEMPLATES)
  vector<Point> v1(1);
  CPPUNIT_ASSERT( v1.size() == 1 );

  vector<PointEx> v2(v1.begin(), v1.end());
  CPPUNIT_ASSERT( v2.size() == 1 );
  CPPUNIT_ASSERT( v2[0].builtFromBase == true );
#endif
}

void VectorTest::assign_check()
{
#if !defined (STLPORT) || !defined (_STLP_NO_MEMBER_TEMPLATES)
  vector<int> v(3,1);
  int array[] = { 1, 2, 3, 4, 5 };

  v.assign( array, array + 5 );
  CPPUNIT_CHECK( v[4] == 5 );
  CPPUNIT_CHECK( v[0] == 1 );
  CPPUNIT_CHECK( v[1] == 2 );
#endif
}

void VectorTest::iterators()
{
  vector<int> vint(10, 0);
  vector<int> const& crvint = vint;

  CPPUNIT_ASSERT( vint.begin() == vint.begin() );
  CPPUNIT_ASSERT( crvint.begin() == vint.begin() );
  CPPUNIT_ASSERT( vint.begin() == crvint.begin() );
  CPPUNIT_ASSERT( crvint.begin() == crvint.begin() );

  CPPUNIT_ASSERT( vint.begin() != vint.end() );
  CPPUNIT_ASSERT( crvint.begin() != vint.end() );
  CPPUNIT_ASSERT( vint.begin() != crvint.end() );
  CPPUNIT_ASSERT( crvint.begin() != crvint.end() );

  CPPUNIT_ASSERT( vint.rbegin() == vint.rbegin() );
  // Not Standard:
  //CPPUNIT_ASSERT( vint.rbegin() == crvint.rbegin() );
  //CPPUNIT_ASSERT( crvint.rbegin() == vint.rbegin() );
  CPPUNIT_ASSERT( crvint.rbegin() == crvint.rbegin() );

  CPPUNIT_ASSERT( vint.rbegin() != vint.rend() );
  // Not Standard:
  //CPPUNIT_ASSERT( vint.rbegin() != crvint.rend() );
  //CPPUNIT_ASSERT( crvint.rbegin() != vint.rend() );
  CPPUNIT_ASSERT( crvint.rbegin() != crvint.rend() );
}


#if !defined (STLPORT) || \
    !defined (_STLP_USE_PTR_SPECIALIZATIONS) || defined (_STLP_CLASS_PARTIAL_SPECIALIZATION)
/* Simple compilation test: Check that nested types like iterator
 * can be access even if type used to instanciate container is not
 * yet completely defined.
 */
class IncompleteClass
{
  vector<IncompleteClass> instances;
  typedef vector<IncompleteClass>::iterator it;
};
#endif

#if defined (STLPORT)
#  define NOTHROW _STLP_NOTHROW
#else
#  define NOTHROW throw()
#endif

/* This allocator implementation purpose is simply to break some
 * internal STLport mecanism specific to the STLport own allocator
 * implementation. */
template <class _Tp>
struct NotSTLportAllocator : public allocator<_Tp> {
#if !defined (STLPORT) || defined (_STLP_MEMBER_TEMPLATE_CLASSES)
  template <class _Tp1> struct rebind {
    typedef NotSTLportAllocator<_Tp1> other;
  };
#endif
  NotSTLportAllocator() NOTHROW {}
#if !defined (STLPORT) || defined (_STLP_MEMBER_TEMPLATES)
  template <class _Tp1> NotSTLportAllocator(const NotSTLportAllocator<_Tp1>&) NOTHROW {}
#endif
  NotSTLportAllocator(const NotSTLportAllocator<_Tp>&) NOTHROW {}
  ~NotSTLportAllocator() NOTHROW {}
};

/* This test check a potential issue with empty base class
 * optimization. Some compilers (VC6) do not implement it
 * correctly resulting ina wrong behavior. */
void VectorTest::ebo()
{
  // We use heap memory as test failure can corrupt vector internal
  // representation making executable crash on vector destructor invocation.
  // We prefer a simple memory leak, internal corruption should be reveal
  // by size or capacity checks.
  typedef vector<int, NotSTLportAllocator<int> > V;
  V *pv1 = new V(1, 1);
  V *pv2 = new V(10, 2);

  size_t v1Capacity = pv1->capacity();
  size_t v2Capacity = pv2->capacity();

  pv1->swap(*pv2);

  CPPUNIT_ASSERT( pv1->size() == 10 );
  CPPUNIT_ASSERT( pv1->capacity() == v2Capacity );
  CPPUNIT_ASSERT( (*pv1)[5] == 2 );

  CPPUNIT_ASSERT( pv2->size() == 1 );
  CPPUNIT_ASSERT( pv2->capacity() == v1Capacity );
  CPPUNIT_ASSERT( (*pv2)[0] == 1 );

  delete pv2;
  delete pv1;
}