etl/test/test_deque.cpp

/******************************************************************************
The MIT License(MIT)

Embedded Template Library.

Copyright(c) 2014 jwellbelove

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#include <UnitTest++/UnitTest++.h>

#include "../deque.h"

#include <vector>
#include <algorithm>

const size_t SIZE = 6;

typedef etl::deque<int, SIZE> Data;
typedef std::vector<int>      Compare_Data;

namespace
{		
	SUITE(test_deque)
	{
    //*************************************************************************
		TEST(test_constructor)
		{
      Data data;

      CHECK_EQUAL(SIZE, data.capacity());
      CHECK_EQUAL(SIZE, data.max_size());
		}

    //*************************************************************************
    TEST(test_constructor_fill)
    {
      Compare_Data compare_data = { 5, 5, 5, 5, 5, 5};
      Data data(SIZE, 5);

      CHECK_EQUAL(compare_data.size(), data.size());
      CHECK(std::equal(compare_data.begin(), compare_data.end(), data.begin()));
    }

    //*************************************************************************
    TEST(test_constructor_fill_excess)
    {
      CHECK_THROW(Data(SIZE + 1, 5), etl::deque_full);
    }

    //*************************************************************************
    TEST(test_constructor_range)
    {
      Compare_Data compare_data = { 1, 2, 3, 4, 5 };
      Data data(compare_data.begin(), compare_data.end());

      CHECK_EQUAL(compare_data.size(), data.size());
      CHECK(std::equal(compare_data.begin(), compare_data.end(), data.begin()));
    }

    //*************************************************************************
    TEST(test_constructor_range_excess)
    {
      Compare_Data compare_data = { 1, 2, 3, 4, 5, 6, 7 };
      
      CHECK_THROW(Data data(compare_data.begin(), compare_data.end()), etl::deque_full);
    }

    //*************************************************************************
		TEST(test_copy_constructor)
		{
      Compare_Data compare_data = { 1, 2, 3, 4, 5, 6 };
      Compare_Data modified = { 6, 5, 4, 3, 2, 1 };
     
      Data deque1(compare_data.begin(), compare_data.end());
      Data deque2(deque1);

      CHECK_EQUAL(deque1.size(), deque2.size());
      CHECK(std::equal(compare_data.begin(), compare_data.end(), deque2.begin()));
		}

    //*************************************************************************
		TEST(test_assignment)
		{
      Compare_Data compare_data = { 1, 2, 3, 4, 5, 6 };
     
      Data deque1(compare_data.begin(), compare_data.end());
      Data deque2;
      
      deque2 = deque1;

      CHECK_EQUAL(deque1.size(), deque2.size());
      CHECK(std::equal(compare_data.begin(), compare_data.end(), deque2.begin()));
		}

    //*************************************************************************
    TEST(test_assign_range)
    {
      Compare_Data compare_data = { 1, 2, 3, 4, 5 };
      Data data;

      CHECK_NO_THROW(data.assign(compare_data.begin(), compare_data.end()));

      CHECK_EQUAL(compare_data.size(), data.size());
      CHECK(std::equal(compare_data.begin(), compare_data.end(), data.begin()));
    }

    //*************************************************************************
    TEST(test_assign_range_excess)
    {
      Compare_Data compare_data = { 1, 2, 3, 4, 5, 6, 7 };
      Data data;

      CHECK_THROW(data.assign(compare_data.begin(), compare_data.end()), etl::deque_full);
    }

    //*************************************************************************
    TEST(test_assign_fill)
    {
      Compare_Data compare_data = { 5, 5, 5, 5, 5, 5 };

      Data data;

      CHECK_NO_THROW(data.assign(SIZE, 5));

      CHECK_EQUAL(compare_data.size(), data.size());
      CHECK(std::equal(compare_data.begin(), compare_data.end(), data.begin()));
    }

    //*************************************************************************
    TEST(test_assign_fill_excess)
    {
      Data data;

      CHECK_THROW(data.assign(SIZE + 1, 5), etl::deque_full);
    }

    //*************************************************************************
    TEST(test_at)
    {
      Compare_Data compare_data = { 1, 2, 3, 4, 5 };
      Data data(compare_data.begin(), compare_data.end());

      CHECK_EQUAL(compare_data[0], data.at(0));
      CHECK_EQUAL(compare_data[1], data.at(1));
      CHECK_EQUAL(compare_data[2], data.at(2));
      CHECK_EQUAL(compare_data[3], data.at(3));
      CHECK_EQUAL(compare_data[4], data.at(4));
    }

    //*************************************************************************
    TEST(test_at_const)
    {
      Compare_Data compare_data = { 1, 2, 3, 4, 5 };
      Data data(compare_data.begin(), compare_data.end());
      const Data& cdata(data);

      CHECK_EQUAL(compare_data[0], cdata.at(0));
      CHECK_EQUAL(compare_data[1], cdata.at(1));
      CHECK_EQUAL(compare_data[2], cdata.at(2));
      CHECK_EQUAL(compare_data[3], cdata.at(3));
      CHECK_EQUAL(compare_data[4], cdata.at(4));
    }

    //*************************************************************************
    TEST(test_index_operator)
    {
      Compare_Data compare_data = { 1, 2, 3, 4, 5 };
      Data data(compare_data.begin(), compare_data.end());

      CHECK_EQUAL(compare_data[0], data[0]);
      CHECK_EQUAL(compare_data[1], data[1]);
      CHECK_EQUAL(compare_data[2], data[2]);
      CHECK_EQUAL(compare_data[3], data[3]);
      CHECK_EQUAL(compare_data[4], data[4]);
    }

    //*************************************************************************
    TEST(test_index_operator_const)
    {
      Compare_Data compare_data = { 1, 2, 3, 4, 5 };
      Data data(compare_data.begin(), compare_data.end());
      const Data& ctestDeque(data);

      CHECK_EQUAL(compare_data[0], ctestDeque[0]);
      CHECK_EQUAL(compare_data[1], ctestDeque[1]);
      CHECK_EQUAL(compare_data[2], ctestDeque[2]);
      CHECK_EQUAL(compare_data[3], ctestDeque[3]);
      CHECK_EQUAL(compare_data[4], ctestDeque[4]);
    }
    
    //*************************************************************************
    TEST(test_front)
    {
      Data data;

      data.push_front(1);
      CHECK_EQUAL(1, data.front());

      data.push_front(2);
      CHECK_EQUAL(2, data.front());

      data.push_front(3);
      CHECK_EQUAL(3, data.front());

      data.push_front(4);
      CHECK_EQUAL(4, data.front());

      data.push_front(5);
      CHECK_EQUAL(5, data.front());
    }

    //*************************************************************************
    TEST(test_front_empty)
    {
      Data data;

      CHECK_THROW(int i = data.front(), etl::deque_empty);
    }

    //*************************************************************************
    TEST(test_front_const)
    {
      Data data;
      const Data& ctestDeque = data;

      data.push_front(1);
      CHECK_EQUAL(1, ctestDeque.front());

      data.push_front(2);
      CHECK_EQUAL(2, ctestDeque.front());

      data.push_front(3);
      CHECK_EQUAL(3, ctestDeque.front());

      data.push_front(4);
      CHECK_EQUAL(4, ctestDeque.front());

      data.push_front(5);
      CHECK_EQUAL(5, ctestDeque.front());
    }

    //*************************************************************************
    TEST(test_back)
    {
      Data data;

      data.push_back(1);
      CHECK_EQUAL(1, data.back());

      data.push_back(2);
      CHECK_EQUAL(2, data.back());

      data.push_back(3);
      CHECK_EQUAL(3, data.back());

      data.push_back(4);
      CHECK_EQUAL(4, data.back());

      data.push_back(5);
      CHECK_EQUAL(5, data.back());
    }

    //*************************************************************************
    TEST(test_back_const)
    {
      Data data;
      const Data& ctestDeque = data;

      data.push_back(1);
      CHECK_EQUAL(1, ctestDeque.back());

      data.push_back(2);
      CHECK_EQUAL(2, ctestDeque.back());

      data.push_back(3);
      CHECK_EQUAL(3, ctestDeque.back());

      data.push_back(4);
      CHECK_EQUAL(4, ctestDeque.back());

      data.push_back(5);
      CHECK_EQUAL(5, ctestDeque.back());
    }

    //*************************************************************************
    TEST(test_back_empty)
    {
      Data data;

      CHECK_THROW(int i = data.back(), etl::deque_empty);
    }

    //*************************************************************************
    TEST(test_iterator_comparison)
    {
      Data data(6, 0);

      Data::iterator first = data.begin() + 1;
      Data::iterator second = data.begin() + 4;

      CHECK(first < second);
      CHECK(!(second < first));
    }

    //*************************************************************************
    TEST(test_const_iterator_comparison)
    {
      Data data(6, 0);

      Data::const_iterator first = data.cbegin() + 1;
      Data::const_iterator second = data.cbegin() + 4;

      CHECK(first < second);
      CHECK(!(second < first));
    }

    //*************************************************************************
    TEST(test_iterator_comparison_rollover_left)
    {
      Data data(6, 0);

      data.pop_back();
      data.pop_back();
      data.pop_back();
      data.push_front(1);
      data.push_front(1);
      data.push_front(1);

      Data::const_iterator first = data.cbegin() + 1;
      Data::const_iterator second = data.cbegin() + 4;

      CHECK(first < second);
      CHECK(!(second < first));
    }

    //*************************************************************************
    TEST(test_const_iterator_comparison_rollover_left)
    {
      Data data(6, 0);

      data.pop_back();
      data.pop_back();
      data.pop_back();
      data.push_front(1);
      data.push_front(1);
      data.push_front(1);

      Data::const_iterator first = data.cbegin() + 1;
      Data::const_iterator second = data.cbegin() + 4;

      CHECK(first < second);
      CHECK(!(second < first));
    }

    //*************************************************************************
    TEST(test_iterator_comparison_rollover_right)
    {
      Data data(6, 0);

      data.pop_front();
      data.pop_front();
      data.pop_front();
      data.push_back(1);
      data.push_back(1);
      data.push_back(1);

      Data::iterator first = data.begin() + 1;
      Data::iterator second = data.begin() + 4;

      CHECK(first < second);
      CHECK(!(second < first));
    }

    //*************************************************************************
    TEST(test_const_iterator_comparison_rollover_right)
    {
      Data data(6, 0);

      data.pop_front();
      data.pop_front();
      data.pop_front();
      data.push_back(1);
      data.push_back(1);
      data.push_back(1);

      Data::const_iterator first = data.cbegin() + 1;
      Data::const_iterator second = data.cbegin() + 4;

      CHECK(first < second);
      CHECK(!(second < first));
    }

    //*************************************************************************
    TEST(test_reverse_iterator_comparison)
    {
      Data data(6, 0);

      Data::reverse_iterator first = data.rbegin() + 1;
      Data::reverse_iterator second = data.rbegin() + 4;

      CHECK(first < second);
      CHECK(!(second < first));
    }

    //*************************************************************************
    TEST(test_const_reverse_iterator_comparison)
    {
      Data data(6, 0);

      Data::const_reverse_iterator first = data.crbegin() + 1;
      Data::const_reverse_iterator second = data.crbegin() + 4;

      CHECK(first < second);
      CHECK(!(second < first));
    }

    //*************************************************************************
    TEST(test_reverse_iterator_comparison_rollover_left)
    {
      Data data(6, 0);

      data.pop_back();
      data.pop_back();
      data.pop_back();
      data.push_front(1);
      data.push_front(1);
      data.push_front(1);

      Data::reverse_iterator first = data.rbegin() + 1;
      Data::reverse_iterator second = data.rbegin() + 4;

      CHECK(first < second);
      CHECK(!(second < first));
    }

    //*************************************************************************
    TEST(test_const_reverse_iterator_comparison_rollover_left)
    {
      Data data(6, 0);

      data.pop_back();
      data.pop_back();
      data.pop_back();
      data.push_front(1);
      data.push_front(1);
      data.push_front(1);

      Data::const_reverse_iterator first = data.crbegin() + 1;
      Data::const_reverse_iterator second = data.crbegin() + 4;

      CHECK(first < second);
      CHECK(!(second < first));
    }

    //*************************************************************************
    TEST(test_reverse_iterator_comparison_rollover_right)
    {
      Data data(6, 0);

      data.pop_front();
      data.pop_front();
      data.pop_front();
      data.push_back(1);
      data.push_back(1);
      data.push_back(1);

      Data::reverse_iterator first = data.rbegin() + 1;
      Data::reverse_iterator second = data.rbegin() + 4;

      CHECK(first < second);
      CHECK(!(second < first));
    }

    //*************************************************************************
    TEST(test_const_reverse_iterator_comparison_rollover_right)
    {
      Data data(6, 0);

      data.pop_front();
      data.pop_front();
      data.pop_front();
      data.push_back(1);
      data.push_back(1);
      data.push_back(1);

      Data::const_reverse_iterator first = data.crbegin() + 1;
      Data::const_reverse_iterator second = data.crbegin() + 4;

      CHECK(first < second);
      CHECK(!(second < first));
    }

    //*************************************************************************
    TEST(test_empty)
    {
      Data data;

      CHECK(data.empty());
    }

    //*************************************************************************
    TEST(test_full)
    {
      Data data;
      data.resize(SIZE);

      CHECK(data.full());
    }

    //*************************************************************************
    TEST(test_clear)
    {
      Data data;

      data.resize(SIZE);
      data.clear();
      CHECK(data.empty());
    }

    //*************************************************************************
    TEST(test_insert_value_begin)
    {
      Compare_Data compare_data = { 1, 2, 3, 4 };
      Compare_Data expected = { 5, 1, 2, 3, 4 };
      Data data(compare_data.begin(), compare_data.end());

      Data::iterator position = data.insert(data.begin(), 5);

      CHECK_EQUAL(expected.size(), data.size());
      CHECK(std::equal(expected.begin(), expected.end(), data.begin()));
      CHECK_EQUAL(0, std::distance(data.begin(), position));
    }

    //*************************************************************************
    TEST(test_insert_value_end)
    {
      Compare_Data compare_data = { 1, 2, 3, 4 };
      Compare_Data expected = { 1, 2, 3, 4, 5 };
      Data data(compare_data.begin(), compare_data.end());

      Data::iterator position = data.insert(data.end(), 5);

      CHECK_EQUAL(expected.size(), data.size());
      CHECK(std::equal(expected.begin(), expected.end(), data.begin()));
      CHECK_EQUAL(4, std::distance(data.begin(), position));
    }

    //*************************************************************************
    TEST(test_insert_value_middle)
    {
      Compare_Data compare_data = { 1, 2, 3, 4 };
      Compare_Data expected1 = { 1, 5, 2, 3, 4 };
      Compare_Data expected2 = { 1, 2, 5, 3, 4 };
      Data data(compare_data.begin(), compare_data.end());

      Data::iterator position = data.insert(data.begin() + 1, 5);

      CHECK_EQUAL(expected1.size(), data.size());
      CHECK(std::equal(expected1.begin(), expected1.end(), data.begin()));
      CHECK_EQUAL(1, std::distance(data.begin(), position));

      data.assign(compare_data.begin(), compare_data.end());

      position = data.insert(data.begin() + 2, 5);

      CHECK_EQUAL(expected2.size(), data.size());
      CHECK(std::equal(expected2.begin(), expected2.end(), data.begin()));
      CHECK_EQUAL(2, std::distance(data.begin(), position));
    }

    //*************************************************************************
    TEST(test_insert_n_value_begin)
    {
      Compare_Data compare_data = { 1, 2, 3 };
      Compare_Data expected = { 5, 5, 1, 2, 3 };
      Data data(compare_data.begin(), compare_data.end());

      Data::iterator position = data.insert(data.begin(), 2, 5);

      CHECK_EQUAL(expected.size(), data.size());
      CHECK(std::equal(expected.begin(), expected.end(), data.begin()));
      CHECK_EQUAL(0, std::distance(data.begin(), position));
    }

    //*************************************************************************
    TEST(test_insert_n_value_end)
    {
      Compare_Data compare_data = { 1, 2, 3 };
      Compare_Data expected = { 1, 2, 3, 5, 5 };
      Data data(compare_data.begin(), compare_data.end());

      Data::iterator position = data.insert(data.end(), 2, 5);

      CHECK_EQUAL(expected.size(), data.size());
      CHECK(std::equal(expected.begin(), expected.end(), data.begin()));
      CHECK_EQUAL(3, std::distance(data.begin(), position));
    }

    //*************************************************************************
    TEST(test_insert_n_value_middle)
    {
      Compare_Data compare_data = { 1, 2, 3, 4 };
      Compare_Data expected1 = { 1, 5, 5, 2, 3, 4 };
      Compare_Data expected2 = { 1, 2, 3, 5, 5, 4 };
      Data data(compare_data.begin(), compare_data.end());

      Data::iterator position = data.insert(data.begin() + 1, 2, 5);

      CHECK_EQUAL(expected1.size(), data.size());
      CHECK(std::equal(expected1.begin(), expected1.end(), data.begin()));
      CHECK_EQUAL(1, std::distance(data.begin(), position));

      data.assign(data.max_size(), -1);
      data.assign(compare_data.begin(), compare_data.end());

      position = data.insert(data.begin() + 3, 2, 5);

      CHECK_EQUAL(expected2.size(), data.size());
      CHECK(std::equal(expected2.begin(), expected2.end(), data.begin()));
      CHECK_EQUAL(3, std::distance(data.begin(), position));
    }

    //*************************************************************************
    TEST(test_insert_n_value_excess)
    {
      Compare_Data compare_data = { 1, 2, 3, 4 };
      Data data(compare_data.begin(), compare_data.end());

      CHECK_THROW(data.insert(data.begin(), 3, 5), etl::deque_full);
      CHECK_THROW(data.insert(data.end(), 3, 5), etl::deque_full);
      CHECK_THROW(data.insert(data.begin() + 2, 3, 5), etl::deque_full);
    }

    //*************************************************************************
    TEST(test_insert_range_begin)
    {
      Compare_Data compare_data = { 1, 2, 3 };
      Compare_Data range = { 4, 5 };
      Compare_Data expected = { 4, 5, 1, 2, 3 };
      Data data(compare_data.begin(), compare_data.end());

      Data::iterator position = data.insert(data.begin(), range.begin(), range.end());

      CHECK_EQUAL(expected.size(), data.size());
      CHECK(std::equal(expected.begin(), expected.end(), data.begin()));
    }

    //*************************************************************************
    TEST(test_insert_range_end)
    {
      Compare_Data compare_data = { 1, 2, 3 };
      Compare_Data range = { 4, 5 };
      Compare_Data expected = { 1, 2, 3, 4, 5 };
      Data data(compare_data.begin(), compare_data.end());

      Data::iterator position = data.insert(data.end(), range.cbegin(), range.cend());

      CHECK_EQUAL(expected.size(), data.size());
      CHECK(std::equal(expected.begin(), expected.end(), data.begin()));
    }

    //*************************************************************************
    TEST(test_insert_range_middle)
    {
      Compare_Data compare_data = { 1, 2, 3, 4 };
      Compare_Data range = { 5, 6 };
      Compare_Data expected1 = { 1, 5, 6, 2, 3, 4 };
      Compare_Data expected2 = { 1, 2, 3, 5, 6, 4 };
      Data data(compare_data.begin(), compare_data.end());

      Data::iterator position = data.insert(data.begin() + 1, range.begin(), range.end());

      CHECK_EQUAL(expected1.size(), data.size());
      CHECK(std::equal(expected1.begin(), expected1.end(), data.begin()));
      CHECK_EQUAL(1, std::distance(data.begin(), position));

      data.assign(compare_data.begin(), compare_data.end());

      position = data.insert(data.begin() + 3, range.begin(), range.end());

      CHECK_EQUAL(expected2.size(), data.size());
      CHECK(std::equal(expected2.begin(), expected2.end(), data.begin()));
      CHECK_EQUAL(3, std::distance(data.begin(), position));
    }

    //*************************************************************************
    TEST(test_insert_range_excess)
    {
      Compare_Data compare_data = { 1, 2, 3, 4 };
      Compare_Data range = { 5, 6, 7 };
      Data data(compare_data.begin(), compare_data.end());

      CHECK_THROW(data.insert(data.begin(), range.begin(), range.end()), etl::deque_full);
      CHECK_THROW(data.insert(data.end(), range.begin(), range.end()), etl::deque_full);
      CHECK_THROW(data.insert(data.begin() + 2, range.begin(), range.end()), etl::deque_full);
    }

    //*************************************************************************
    TEST(test_erase_begin)
    {
      Compare_Data compare_data = { 0, 0, 1, 2, 3, 4 };
      Compare_Data expected = { 2, 3, 4, 5, 6 };
      Data data(compare_data.begin(), compare_data.end());

      // Cause rollover.
      data.pop_front();
      data.pop_front();
      data.push_back(5);
      data.push_back(6);

      Data::iterator i_next = data.erase(data.begin());

      CHECK_EQUAL(Data::difference_type(expected.size()), std::distance(data.begin(), data.end()));
      CHECK(std::equal(expected.begin(), expected.end(), data.begin()));
      CHECK_EQUAL(i_next.get_index(), data.begin().get_index());
    }

    //*************************************************************************
    TEST(test_erase_end)
    {
      Compare_Data compare_data = { 0, 0, 1, 2, 3, 4 };
      Compare_Data expected = { 1, 2, 3, 4, 5 };
      Data data(compare_data.begin(), compare_data.end());

      // Cause rollover.
      data.pop_front();
      data.pop_front();
      data.push_back(5);
      data.push_back(6);

      Data::iterator i_erase = data.end() - 1;
      Data::iterator i_next = data.erase(i_erase);

      CHECK_EQUAL(Data::difference_type(expected.size()), std::distance(data.begin(), data.end()));
      CHECK(std::equal(expected.begin(), expected.end(), data.begin()));
      CHECK_EQUAL(i_next.get_index(), data.end().get_index());
    }

    //*************************************************************************
    TEST(test_erase_middle)
    {
      Compare_Data compare_data = { 0, 0, 1, 2, 3, 4 };
      Compare_Data expected1 = { 1, 3, 4, 5, 6 };
      Compare_Data expected2 = { 1, 2, 3, 4, 6 };

      Data data(compare_data.begin(), compare_data.end());

      // Cause rollover.
      data.pop_front();
      data.pop_front();
      data.push_back(5);
      data.push_back(6);

      // Erase near beginning.
      Data::iterator i_erase = data.begin() + 1;
      Data::iterator i_next = data.erase(i_erase);

      CHECK_EQUAL(Data::difference_type(expected1.size()), std::distance(data.begin(), data.end()));
      CHECK(std::equal(expected1.begin(), expected1.end(), data.begin()));
      CHECK_EQUAL(i_next.get_index(), data.begin().get_index() + 1);

      data.assign(compare_data.begin(), compare_data.end());

      // Cause rollover.
      data.pop_front();
      data.pop_front();
      data.push_back(5);
      data.push_back(6);

      // Erase near end.
      i_next = data.erase(data.begin() + 4);

      CHECK_EQUAL(Data::difference_type(expected2.size()), std::distance(data.begin(), data.end()));
      CHECK(std::equal(expected2.begin(), expected2.end(), data.begin()));
      CHECK_EQUAL(i_next.get_index(), data.begin().get_index() + 4);
    }

    //*************************************************************************
    TEST(test_erase_range_begin)
    {
      Compare_Data compare_data = { 0, 0, 1, 2, 3, 4 };
      Compare_Data expected = { 3, 4, 5, 6 };
      Data data(compare_data.begin(), compare_data.end());

      // Cause rollover.
      data.pop_front();
      data.pop_front();
      data.push_back(5);
      data.push_back(6);

      Data::iterator i_next = data.erase(data.begin(), data.begin() + 2);

      CHECK_EQUAL(Data::difference_type(expected.size()), std::distance(data.begin(), data.end()));
      CHECK(std::equal(expected.begin(), expected.end(), data.begin()));
      CHECK_EQUAL(i_next.get_index(), data.begin().get_index());
    }

    //*************************************************************************
    TEST(test_erase_range_end)
    {
      Compare_Data compare_data = { 0, 0, 1, 2, 3, 4 };
      Compare_Data expected = { 1, 2, 3, 4 };
      Data data(compare_data.begin(), compare_data.end());

      // Cause rollover.
      data.pop_front();
      data.pop_front();
      data.push_back(5);
      data.push_back(6);

      Data::iterator i_next = data.erase(data.end() - 2, data.end());

      CHECK_EQUAL(Data::difference_type(expected.size()), std::distance(data.begin(), data.end()));
      CHECK(std::equal(expected.begin(), expected.end(), data.begin()));
      CHECK_EQUAL(i_next.get_index(), data.end().get_index());
    }

    //*************************************************************************
    TEST(test_erase_range_middle)
    {
      Compare_Data compare_data = { 0, 0, 1, 2, 3, 4 };
      Compare_Data expected1 = { 1, 4, 5, 6 };
      Compare_Data expected2 = { 1, 2, 3, 6 };

      Data data(compare_data.begin(), compare_data.end());

      // Cause rollover.
      data.pop_front();
      data.pop_front();
      data.push_back(5);
      data.push_back(6);

      Data::iterator i_next = data.erase(data.begin() + 1, data.begin() + 3);

      CHECK_EQUAL(Data::difference_type(expected1.size()), std::distance(data.begin(), data.end()));
      CHECK(std::equal(expected1.begin(), expected1.end(), data.begin()));
      CHECK_EQUAL(i_next.get_index(), (data.begin() + 1).get_index());

      data.assign(compare_data.begin(), compare_data.end());

      // Cause rollover.
      data.pop_front();
      data.pop_front();
      data.push_back(5);
      data.push_back(6);

      i_next = data.erase(data.begin() + 3, data.begin() + 5);

      CHECK_EQUAL(Data::difference_type(expected2.size()), std::distance(data.begin(), data.end()));
      CHECK(std::equal(expected2.begin(), expected2.end(), data.begin()));
      CHECK_EQUAL(i_next.get_index(), (data.begin() + 3).get_index());

      Compare_Data original2 = { 0, 0, 0, 0, 1, 2 };
      Compare_Data expected3 = { 1, 2, 5, 6 };

      data.assign(original2.begin(), original2.end());

      // Cause rollover.
      data.pop_front();
      data.pop_front();
      data.pop_front();
      data.pop_front();
      data.push_back(3);
      data.push_back(4);
      data.push_back(5);
      data.push_back(6);

      i_next = data.erase(data.begin() + 2, data.begin() + 4);

      CHECK_EQUAL(Data::difference_type(expected3.size()), std::distance(data.begin(), data.end()));
      CHECK(std::equal(expected3.begin(), expected3.end(), data.begin()));
      CHECK_EQUAL(i_next.get_index(), (data.begin() + 2).get_index());
    }

    //*************************************************************************
    TEST(test_push_back_null)
    {
      Compare_Data compare_data = { 1, 2, 3, 4, 5 };
      Data data;

      CHECK_NO_THROW(data.push_back());
      CHECK_NO_THROW(data.back() = 1);
      CHECK_EQUAL(size_t(1), data.size());

      CHECK_NO_THROW(data.push_back());
      CHECK_NO_THROW(data.back() = 2);
      CHECK_EQUAL(size_t(2), data.size());

      CHECK_NO_THROW(data.push_back());
      CHECK_NO_THROW(data.back() = 3);
      CHECK_EQUAL(size_t(3), data.size());

      CHECK_NO_THROW(data.push_back());
      CHECK_NO_THROW(data.back() = 4);
      CHECK_EQUAL(size_t(4), data.size());

      CHECK_NO_THROW(data.push_back());
      CHECK_NO_THROW(data.back() = 5);
      CHECK_EQUAL(size_t(5), data.size());

      CHECK(std::equal(compare_data.begin(), compare_data.end(), data.begin()));
    }

    //*************************************************************************
    TEST(test_push_back)
    {
      Compare_Data compare_data = { 1, 2, 3, 4, 5};
      Data data;

      CHECK_NO_THROW(data.push_back(1));
      CHECK_EQUAL(size_t(1), data.size());
      CHECK(std::equal(compare_data.begin(), compare_data.end() - 4, data.begin()));

      CHECK_NO_THROW(data.push_back(2));
      CHECK_EQUAL(size_t(2), data.size());
      CHECK(std::equal(compare_data.begin(), compare_data.end() - 3, data.begin()));

      CHECK_NO_THROW(data.push_back(3));
      CHECK_EQUAL(size_t(3), data.size());
      CHECK(std::equal(compare_data.begin(), compare_data.end() - 2, data.begin()));

      CHECK_NO_THROW(data.push_back(4));
      CHECK_EQUAL(size_t(4), data.size());
      CHECK(std::equal(compare_data.begin(), compare_data.end() - 1, data.begin()));

      CHECK_NO_THROW(data.push_back(5));
      CHECK_EQUAL(size_t(5), data.size());
      CHECK(std::equal(compare_data.begin(), compare_data.end(), data.begin()));
    }

    //*************************************************************************
    TEST(test_push_back_excess)
    {
      Data data;

      CHECK_NO_THROW(data.push_back(1));
      CHECK_NO_THROW(data.push_back(2));
      CHECK_NO_THROW(data.push_back(3));
      CHECK_NO_THROW(data.push_back(4));
      CHECK_NO_THROW(data.push_back(5));
      CHECK_NO_THROW(data.push_back(6));
      CHECK_THROW(data.push_back(7), etl::deque_full);
    }

    //*************************************************************************
    TEST(test_pop_back)
    {
      Compare_Data compare_data = { 1, 2, 3, 4, 5 };
      Data data;

      data.assign(compare_data.begin(), compare_data.end());

      data.pop_back();
      CHECK_EQUAL(size_t(4), data.size());
      CHECK(std::equal(compare_data.begin(), compare_data.end() - 1, data.begin()));

      data.pop_back();
      CHECK_EQUAL(size_t(3), data.size());
      CHECK(std::equal(compare_data.begin(), compare_data.end() - 2, data.begin()));

      data.pop_back();
      CHECK_EQUAL(size_t(2), data.size());
      CHECK(std::equal(compare_data.begin(), compare_data.end() - 3, data.begin()));

      data.pop_back();
      CHECK_EQUAL(size_t(1), data.size());
      CHECK(std::equal(compare_data.begin(), compare_data.end() - 4, data.begin()));

      data.pop_back();
      CHECK_EQUAL(size_t(0), data.size());
    }

    //*************************************************************************
    TEST(test_push_front_null)
    {
      Compare_Data compare_data = {5,  4, 3, 2, 1 };
      Data data;

      CHECK_NO_THROW(data.push_front());
      CHECK_NO_THROW(data.front() = 1);
      CHECK_EQUAL(size_t(1), data.size());

      CHECK_NO_THROW(data.push_front());
      CHECK_NO_THROW(data.front() = 2);
      CHECK_EQUAL(size_t(2), data.size());

      CHECK_NO_THROW(data.push_front());
      CHECK_NO_THROW(data.front() = 3);
      CHECK_EQUAL(size_t(3), data.size());

      CHECK_NO_THROW(data.push_front());
      CHECK_NO_THROW(data.front() = 4);
      CHECK_EQUAL(size_t(4), data.size());

      CHECK_NO_THROW(data.push_front());
      CHECK_NO_THROW(data.front() = 5);
      CHECK_EQUAL(size_t(5), data.size());

      CHECK(std::equal(compare_data.begin(), compare_data.end(), data.begin()));
    }

    //*************************************************************************
    TEST(test_push_front)
    {
      Compare_Data compare_data = { 5, 4, 3, 2, 1 };
      Data data;

      CHECK_NO_THROW(data.push_front(1));
      CHECK_EQUAL(size_t(1), data.size());
      CHECK(std::equal(compare_data.begin() + 4, compare_data.end(), data.begin()));

      CHECK_NO_THROW(data.push_front(2));
      CHECK_EQUAL(size_t(2), data.size());
      CHECK(std::equal(compare_data.begin() + 3, compare_data.end(), data.begin()));

      CHECK_NO_THROW(data.push_front(3));
      CHECK_EQUAL(size_t(3), data.size());
      CHECK(std::equal(compare_data.begin() + 2, compare_data.end(), data.begin()));

      CHECK_NO_THROW(data.push_front(4));
      CHECK_EQUAL(size_t(4), data.size());
      CHECK(std::equal(compare_data.begin() + 1, compare_data.end(), data.begin()));

      CHECK_NO_THROW(data.push_front(5));
      CHECK_EQUAL(size_t(5), data.size());
      CHECK(std::equal(compare_data.begin(), compare_data.end(), data.begin()));
    }

    //*************************************************************************
    TEST(test_push_front_excess)
    {
      Data data;

      for (size_t i = 0; i < SIZE; ++i)
      {
        CHECK_NO_THROW(data.push_front(i));
      }

      CHECK_THROW(data.push_front(SIZE), etl::deque_full);
    }

    //*************************************************************************
    TEST(test_push_front_push_back)
    {
      Compare_Data compare_data = { 1, 2, 3, 4, 5};
      Data data;

      CHECK_NO_THROW(data.push_back(3));
      CHECK_NO_THROW(data.push_front(2));
      CHECK_NO_THROW(data.push_back(4));
      CHECK_NO_THROW(data.push_front(1));
      CHECK_NO_THROW(data.push_back(5));

      CHECK(std::equal(compare_data.begin(), compare_data.end(), data.begin()));
    }

    //*************************************************************************
    TEST(test_push_back_pop_front_push_back)
    {
      Compare_Data compare_data = { 6, 7, 8 };
      Data data;

      data.push_back(1);
      data.push_back(2);
      data.push_back(3);
      data.push_back(4);
      data.push_back(5);
      data.pop_front();
      data.pop_front();
      data.pop_front();
      data.pop_front();
      data.pop_front();
      data.push_back(6);
      data.push_back(7);
      data.push_back(8);

      CHECK(std::equal(compare_data.begin(), compare_data.end(), data.begin()));
    }

    //*************************************************************************
    TEST(test_pop_front)
    {
      Compare_Data compare_data = { 1, 2, 3, 4, 5 };
      Data data;

      data.assign(compare_data.begin(), compare_data.end());

      data.pop_front();
      CHECK_EQUAL(size_t(4), data.size());
      CHECK(std::equal(compare_data.begin() + 1, compare_data.end(), data.begin()));

      data.pop_front();
      CHECK_EQUAL(size_t(3), data.size());
      CHECK(std::equal(compare_data.begin() + 2, compare_data.end(), data.begin()));

      data.pop_front();
      CHECK_EQUAL(size_t(2), data.size());
      CHECK(std::equal(compare_data.begin() + 3, compare_data.end(), data.begin()));

      data.pop_front();
      CHECK_EQUAL(size_t(1), data.size());
      CHECK(std::equal(compare_data.begin() + 4, compare_data.end(), data.begin()));

      data.pop_front();
      CHECK_EQUAL(size_t(0), data.size());
    }

    //*************************************************************************
    TEST(test_resize_up)
    {
      Compare_Data compare_data = { 1, 2, 0, 0, 0 };
      Data data;

      // Cause rollover.
      data.push_back(0);
      data.push_back(0);
      data.push_back(0);
      data.push_back(0);
      data.pop_front();
      data.pop_front();
      data.pop_front();
      data.pop_front();
      data.push_back(1);
      data.push_back(2);
      data.resize(SIZE);

      CHECK_EQUAL(size_t(SIZE), data.size());
      CHECK(std::equal(compare_data.begin(), compare_data.end(), data.begin()));
    }

    //*************************************************************************
    TEST(test_resize_down)
    {
      Compare_Data compare_data = { 1, 2 };
      Data data;

      // Cause rollover.
      data.push_back(0);
      data.push_back(0);
      data.push_back(0);
      data.pop_front();
      data.pop_front();
      data.pop_front();
      data.push_back(1);
      data.push_back(2);
      data.push_back(3);
      data.push_back(4);
      data.push_back(5);
      data.push_back(6);
      data.resize(data.size() - 4);

      CHECK_EQUAL(size_t(2), data.size());
      CHECK(std::equal(compare_data.begin(), compare_data.end(), data.begin()));
    }

    //*************************************************************************
    TEST(test_resize_value)
    {
      Compare_Data compare_data = { 1, 2, 3, 3, 3 };
      Data data;

      data.push_front(1);
      data.push_back(2);
      data.resize(SIZE, 3);

      CHECK_EQUAL(size_t(SIZE), data.size());
      CHECK(std::equal(compare_data.begin(), compare_data.end(), data.begin()));
    }

    //*************************************************************************
    TEST(test_resize_excess)
    {
      Data data;

      CHECK_THROW(data.resize(SIZE + 1), etl::deque_out_of_bounds);
    }

    //*************************************************************************
    TEST(test_swap)
    {
      Compare_Data compare_data1 = { 1, 2, 3, 4, 5, 6 };
      Compare_Data compare_data2 = { 6, 5, 4 };

      Data data1(compare_data1.begin(), compare_data1.end());
      Data data2(compare_data2.begin(), compare_data2.end());

      swap(data1, data2);

      CHECK_EQUAL(compare_data2.size(), data1.size());
      CHECK_EQUAL(compare_data1.size(), data2.size());

      CHECK_EQUAL(std::distance(compare_data2.begin(), compare_data2.end()), std::distance(data1.begin(), data1.end()));
      CHECK_EQUAL(std::distance(compare_data1.begin(), compare_data1.end()), std::distance(data2.begin(), data2.end()));

      CHECK(std::equal(compare_data2.begin(), compare_data2.end(), data1.begin()));
      CHECK(std::equal(compare_data1.begin(), compare_data1.end(), data2.begin()));
    }

    //*************************************************************************
		TEST(test_equality_operator)
		{
      Compare_Data same      = { 1, 2, 3, 4, 5, 6 };
      Compare_Data different = { 6, 5, 4, 3, 2, 1 };
     
      Data deque1(same.begin(), same.end());
      Data deque2(deque1);

      CHECK(deque1 == deque2);

      // Change deque2's data.
      std::copy(different.begin(), different.end(), deque2.begin());

      CHECK(!(deque1 == deque2));
		}

    //*************************************************************************
    TEST(test_inequality_operator)
    {
      Compare_Data same = { 1, 2, 3, 4, 5, 6 };
      Compare_Data different = { 6, 5, 4, 3, 2, 1 };

      Data deque1(same.begin(), same.end());
      Data deque2(deque1);

      CHECK(!(deque1 != deque2));

      // Change deque2's data.
      std::copy(different.begin(), different.end(), deque2.begin());

      CHECK(deque1 != deque2);
    }
	};
}