etl/test/test_forward_list.cpp

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

Embedded Template Library.
https://github.com/ETLCPP/etl
https://www.etlcpp.com

Copyright(c) 2014 John Wellbelove

Permission is hereby granted, free of charge, to any person obtaining a copy
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******************************************************************************/

#include "unit_test_framework.h"

#include "data.h"

#include "etl/forward_list.h"

#include <algorithm>
#include <array>
#include <forward_list>
#include <vector>
#include <string>
#include <list>
#include <functional>

namespace
{
  SUITE(test_forward_list)
  {
    const size_t SIZE = 10UL;

    typedef TestDataDC<std::string>  ItemDC;
    typedef TestDataNDC<std::string> ItemNDC;
    typedef TestDataM<uint32_t>      ItemM;

    typedef etl::forward_list<ItemDC, SIZE>  DataDC;
    typedef etl::forward_list<ItemNDC, SIZE> DataNDC;
    typedef etl::iforward_list<ItemNDC>      IDataNDC;

    typedef etl::forward_list<ItemM, SIZE>  DataM;
    typedef etl::iforward_list<ItemM>       IDataM;

    typedef etl::forward_list<int, SIZE> DataInt;

    typedef std::forward_list<ItemDC> CompareDataDC;
    typedef std::forward_list<ItemNDC> CompareDataNDC;
    typedef std::vector<ItemNDC> InitialDataNDC;

    InitialDataNDC stable_sort_data;
    InitialDataNDC unsorted_data;
    InitialDataNDC sorted_data;
    InitialDataNDC non_unique_data;
    InitialDataNDC small_data;

    bool are_equal;

    //*************************************************************************
    struct SetupFixture
    {
      SetupFixture()
      {
        stable_sort_data = { ItemNDC("1", 1), ItemNDC("2", 2), ItemNDC("3", 3), ItemNDC("2", 4), ItemNDC("0", 5), ItemNDC("2", 6), ItemNDC("7", 7), ItemNDC("4", 8), ItemNDC("4", 9), ItemNDC("8", 10) };
        unsorted_data    = { ItemNDC("1"), ItemNDC("0"), ItemNDC("3"), ItemNDC("2"), ItemNDC("5"), ItemNDC("4"), ItemNDC("7"), ItemNDC("6"), ItemNDC("9"), ItemNDC("8") };
        sorted_data      = { ItemNDC("0"), ItemNDC("1"), ItemNDC("2"), ItemNDC("3"), ItemNDC("4"), ItemNDC("5"), ItemNDC("6"), ItemNDC("7"), ItemNDC("8"), ItemNDC("9") };
        non_unique_data  = { ItemNDC("0"), ItemNDC("0"), ItemNDC("1"), ItemNDC("1"), ItemNDC("2"), ItemNDC("3"), ItemNDC("3"), ItemNDC("3"), ItemNDC("4"), ItemNDC("5") };
        small_data       = { ItemNDC("0"), ItemNDC("1"), ItemNDC("2"), ItemNDC("3"), ItemNDC("4"), ItemNDC("5") };
      }
    };

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_default_constructor)
    {
      DataDC data;

      CHECK(data.empty());
      CHECK_EQUAL(data.max_size(), SIZE);
      CHECK(data.begin() == data.end());
    }

#if ETL_USING_CPP17 && ETL_HAS_INITIALIZER_LIST && !defined(ETL_TEMPLATE_DEDUCTION_GUIDE_TESTS_DISABLED)
    //*************************************************************************
    TEST(test_cpp17_deduced_constructor)
    {
      etl::forward_list data{ ItemNDC("1", 1), ItemNDC("2", 2), ItemNDC("3", 3), ItemNDC("2", 4), ItemNDC("0", 5), ItemNDC("2", 6), ItemNDC("7", 7), ItemNDC("4", 8), ItemNDC("4", 9), ItemNDC("8", 10) };
      etl::forward_list< ItemNDC, 10> check = { ItemNDC("1", 1), ItemNDC("2", 2), ItemNDC("3", 3), ItemNDC("2", 4), ItemNDC("0", 5), ItemNDC("2", 6), ItemNDC("7", 7), ItemNDC("4", 8), ItemNDC("4", 9), ItemNDC("8", 10) };

      CHECK(!data.empty());
      CHECK(data.full());
      CHECK(data.begin() != data.end());
      CHECK_EQUAL(0U, data.available());
      CHECK_EQUAL(10U, data.capacity());
      CHECK_EQUAL(10U, data.size());
      CHECK_EQUAL(10U, data.max_size());
      CHECK(data == check);
    }
#endif

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_constructor_size)
    {
      const size_t INITIAL_SIZE = 4UL;
      DataDC data(INITIAL_SIZE);

      CHECK(!data.empty());
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_constructor_size_excess)
    {
      CHECK_THROW(DataDC data(SIZE + 1), etl::forward_list_full);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_constructor_size_value)
    {
      const size_t INITIAL_SIZE = 4UL;
      const ItemNDC INITIAL_VALUE("1");

      std::array<ItemNDC, INITIAL_SIZE> compare_data = { ItemNDC("1"), ItemNDC("1"), ItemNDC("1"), ItemNDC("1") };

      DataNDC data(INITIAL_SIZE, INITIAL_VALUE);

      CHECK(!data.empty());

      are_equal = std::equal(data.begin(), data.end(), compare_data.begin());

      CHECK(are_equal);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_constructor_range)
    {
      CompareDataNDC compare(sorted_data.begin(), sorted_data.end());
      DataNDC data(sorted_data.begin(), sorted_data.end());

      CHECK(!data.empty());

      are_equal = std::equal(data.begin(), data.end(), compare.begin());

      CHECK(are_equal);
    }

#if ETL_HAS_INITIALIZER_LIST
    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_constructor_initializer_list)
    {
      CompareDataNDC compare = { ItemNDC("0"), ItemNDC("1"), ItemNDC("2"), ItemNDC("3") };
      DataNDC data = { ItemNDC("0"), ItemNDC("1"), ItemNDC("2"), ItemNDC("3") };

      CHECK(!data.empty());

      are_equal = std::equal(data.begin(), data.end(), compare.begin());
      CHECK(are_equal);
    }
#endif

    //*************************************************************************
    TEST(test_destruct_via_iforward_list)
    {
      int current_count = ItemNDC::get_instance_count();

      DataNDC* pdata = new DataNDC(sorted_data.begin(), sorted_data.end());
      CHECK_EQUAL(int(current_count + sorted_data.size()), ItemNDC::get_instance_count());

      IDataNDC* pidata = pdata;
      delete pidata;
      CHECK_EQUAL(current_count, ItemNDC::get_instance_count());
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_copy_constructor)
    {
      CompareDataNDC compare_data(sorted_data.begin(), sorted_data.end());
      DataNDC data(sorted_data.begin(), sorted_data.end());
      DataNDC other_data(data);

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

    //*************************************************************************
    TEST(test_move_constructor)
    {
      ItemM p1(1U);
      ItemM p2(2U);
      ItemM p3(3U);
      ItemM p4(4U);

      DataM data1;
      data1.push_front(std::move(p1));
      data1.push_front(std::move(p2));
      data1.push_front(std::move(p3));
      data1.push_front(std::move(p4));

      CHECK(!bool(p1));
      CHECK(!bool(p2));
      CHECK(!bool(p3));
      CHECK(!bool(p4));

      DataM data2(std::move(data1));

      CHECK_EQUAL(0U, data1.size());
      CHECK_EQUAL(4U, data2.size());

      DataM::const_iterator itr = data2.begin();

      CHECK_EQUAL(4U, (*itr++).value);
      CHECK_EQUAL(3U, (*itr++).value);
      CHECK_EQUAL(2U, (*itr++).value);
      CHECK_EQUAL(1U, (*itr++).value);
    }

    //*************************************************************************
    TEST(test_move_assignment)
    {
      ItemM p1(1U);
      ItemM p2(2U);
      ItemM p3(3U);
      ItemM p4(4U);

      DataM data1;
      data1.push_front(std::move(p1));
      data1.push_front(std::move(p2));
      data1.push_front(std::move(p3));
      data1.push_front(std::move(p4));

      DataM data2;
      data2 = std::move(data1);

      CHECK_EQUAL(0U, data1.size());
      CHECK_EQUAL(4U, data2.size());

      DataM::const_iterator itr = data2.begin();

      CHECK_EQUAL(4U, (*itr++).value);
      CHECK_EQUAL(3U, (*itr++).value);
      CHECK_EQUAL(2U, (*itr++).value);
      CHECK_EQUAL(1U, (*itr++).value);
    }

    //*************************************************************************
    TEST(test_move_assignment_interface)
    {
      ItemM p1(1U);
      ItemM p2(2U);
      ItemM p3(3U);
      ItemM p4(4U);

      DataM data1;
      data1.push_front(std::move(p1));
      data1.push_front(std::move(p2));
      data1.push_front(std::move(p3));
      data1.push_front(std::move(p4));

      DataM data2;

      IDataM& idata1 = data1;
      IDataM& idata2 = data2;

      idata2 = std::move(idata1);

      CHECK_EQUAL(0U, data1.size());
      CHECK_EQUAL(4U, data2.size());

      DataM::const_iterator itr = data2.begin();

      CHECK_EQUAL(4U, (*itr++).value);
      CHECK_EQUAL(3U, (*itr++).value);
      CHECK_EQUAL(2U, (*itr++).value);
      CHECK_EQUAL(1U, (*itr++).value);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_iterator)
    {
      CompareDataNDC compare_data(sorted_data.begin(), sorted_data.end());
      DataNDC data(compare_data.begin(), compare_data.end());

      are_equal = std::equal(data.begin(), data.end(), compare_data.begin());

      CHECK(are_equal);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_const_iterator)
    {
      CompareDataNDC compare_data(sorted_data.begin(), sorted_data.end());
      const DataNDC data(compare_data.begin(), compare_data.end());

      are_equal = std::equal(data.cbegin(), data.cend(), compare_data.cbegin());

      CHECK(are_equal);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_resize_up)
    {
      const size_t INITIAL_SIZE = 4UL;
      const size_t NEW_SIZE = 8UL;
      const ItemDC VALUE("1");

      DataDC data(INITIAL_SIZE, VALUE);
      data.resize(NEW_SIZE);

      CompareDataDC compare_data(INITIAL_SIZE, VALUE);
      compare_data.resize(NEW_SIZE);

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_resize_up_value)
    {
      const size_t INITIAL_SIZE = 4UL;
      const size_t NEW_SIZE     = 8UL;
      const ItemNDC VALUE("1");

      DataNDC data(INITIAL_SIZE, VALUE);
      data.resize(NEW_SIZE, VALUE);

      CompareDataNDC compare_data(INITIAL_SIZE, VALUE);
      compare_data.resize(NEW_SIZE, VALUE);

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_resize_excess)
    {
      const size_t INITIAL_SIZE = 4UL;
      DataDC data(INITIAL_SIZE);

      CHECK_THROW(data.resize(data.max_size() + 1), etl::forward_list_full);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_resize_down)
    {
      const size_t INITIAL_SIZE = 4UL;
      const size_t NEW_SIZE = 2UL;
      const ItemDC VALUE("1");

      DataDC data(INITIAL_SIZE, VALUE);
      data.resize(NEW_SIZE);

      CompareDataDC compare_data(INITIAL_SIZE, VALUE);
      compare_data.resize(NEW_SIZE);

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_resize_down_value)
    {
      const size_t INITIAL_SIZE = 4UL;
      const size_t NEW_SIZE = 2UL;
      const ItemNDC VALUE("1");

      DataNDC data(INITIAL_SIZE, VALUE);
      data.resize(NEW_SIZE, VALUE);

      CompareDataNDC compare_data(INITIAL_SIZE, VALUE);
      compare_data.resize(NEW_SIZE, VALUE);

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_resize_zero)
    {
      const size_t INITIAL_SIZE = 4UL;
      const size_t NEW_SIZE = 0UL;
      const ItemDC VALUE("1");

      DataDC data(INITIAL_SIZE, VALUE);
      data.resize(NEW_SIZE);

      CompareDataDC compare_data(INITIAL_SIZE, VALUE);
      compare_data.resize(NEW_SIZE);

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_clear)
    {
      DataNDC data(sorted_data.begin(), sorted_data.end());
      data.clear();
      CHECK(data.empty());

      // Do it again to check that clear() didn't screw up the internals.
      data.assign(sorted_data.begin(), sorted_data.end());
      CHECK_EQUAL(SIZE, data.size());
      data.clear();
      CHECK_EQUAL(size_t(0UL), data.size());
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_clear_pod)
    {
      DataInt data(SIZE, 1);

      data.clear();
      CHECK(data.empty());

      // Do it again to check that clear() didn't screw up the internals.
      data.resize(SIZE);
      CHECK_EQUAL(SIZE, data.size());
      data.clear();
      CHECK_EQUAL(size_t(0UL), data.size());
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_assign_range)
    {
      CompareDataNDC compare_data(sorted_data.begin(), sorted_data.end());
      DataNDC data;

      // Do it twice. We should only get one copy.
      data.assign(compare_data.begin(), compare_data.end());
      data.assign(compare_data.begin(), compare_data.end());

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_assign_size_value)
    {
      const size_t INITIAL_SIZE = 4UL;
      const ItemNDC VALUE("1");

      CompareDataNDC compare_data(INITIAL_SIZE, VALUE);
      DataNDC data;

      // Do it twice. We should only get one copy.
      data.assign(INITIAL_SIZE, VALUE);
      data.assign(INITIAL_SIZE, VALUE);

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_assign_size_value_excess)
    {
      const ItemNDC VALUE("1");

      DataNDC data;

      CHECK_THROW(data.assign(data.max_size() + 1, VALUE), etl::forward_list_full);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_insert_after_position_value)
    {
      const size_t INITIAL_SIZE = 4UL;
      const ItemNDC VALUE("1");
      const ItemNDC INSERT_VALUE("2");

      CompareDataNDC compare_data(INITIAL_SIZE, VALUE);
      DataNDC data(INITIAL_SIZE, VALUE);

      size_t offset = 2UL;

      DataNDC::iterator i_data = data.begin();
      std::advance(i_data, offset);

      CompareDataNDC::iterator i_compare_data = compare_data.begin();
      std::advance(i_compare_data, offset);

      data.insert_after(i_data, INSERT_VALUE);
      compare_data.insert_after(i_compare_data, INSERT_VALUE);

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

      offset = 0;

      i_data = data.begin();
      std::advance(i_data, offset);

      i_compare_data = compare_data.begin();
      std::advance(i_compare_data, offset);

      data.insert_after(i_data, INSERT_VALUE);
      compare_data.insert_after(i_compare_data, INSERT_VALUE);

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_insert_after_position_size_value)
    {
      const size_t INITIAL_SIZE = 4UL;
      const ItemNDC VALUE("1");
      const ItemNDC INSERT_VALUE("2");

      CompareDataNDC compare_data(INITIAL_SIZE, VALUE);
      DataNDC data(INITIAL_SIZE, VALUE);

      size_t offset = 2UL;

      DataNDC::iterator i_data = data.begin();
      std::advance(i_data, offset);

      CompareDataNDC::iterator i_compare_data = compare_data.begin();
      std::advance(i_compare_data, offset);

      data.insert_after(i_data, 2, INSERT_VALUE);
      compare_data.insert_after(i_compare_data, 2, INSERT_VALUE);

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

      offset = 0;

      i_data = data.begin();
      std::advance(i_data, offset);

      i_compare_data = compare_data.begin();
      std::advance(i_compare_data, offset);

      data.insert_after(i_data, 2, INSERT_VALUE);
      compare_data.insert_after(i_compare_data, 2, INSERT_VALUE);

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_insert_after_range)
    {
      std::vector<ItemNDC> test1 = { ItemNDC("0"), ItemNDC("1"), ItemNDC("2"), ItemNDC("3"), ItemNDC("4") };
      std::vector<ItemNDC> test2 = { ItemNDC("5"), ItemNDC("6"), ItemNDC("7"), ItemNDC("8"), ItemNDC("9") };

      CompareDataNDC compare_data(test1.begin(), test1.end());
      DataNDC data(test1.begin(), test1.end());

      compare_data.insert_after(compare_data.before_begin(), test2.begin(), test2.end());
      data.insert_after(data.before_begin(), test2.begin(), test2.end());

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

      compare_data.assign(test1.begin(), test1.end());
      data.assign(test1.begin(), test1.end());

      CompareDataNDC::iterator icd = compare_data.begin();
      DataNDC::iterator         id = data.begin();

      std::advance(icd, 3);
      std::advance(id, 3);

      compare_data.insert_after(icd, test2.begin(), test2.end());
      data.insert_after(id, test2.begin(), test2.end());

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_push_front)
    {
      CompareDataNDC compare_data;
      DataNDC data;

      compare_data.push_front(ItemNDC("1"));
      compare_data.push_front(ItemNDC("2"));
      compare_data.push_front(ItemNDC("3"));
      compare_data.push_front(ItemNDC("4"));
      compare_data.push_front(ItemNDC("5"));
      compare_data.push_front(ItemNDC("6"));

      CHECK_NO_THROW(data.push_front(ItemNDC("1")));
      CHECK_NO_THROW(data.push_front(ItemNDC("2")));
      CHECK_NO_THROW(data.push_front(ItemNDC("3")));
      CHECK_NO_THROW(data.push_front(ItemNDC("4")));
      CHECK_NO_THROW(data.push_front(ItemNDC("5")));
      CHECK_NO_THROW(data.push_front(ItemNDC("6")));

      CHECK_EQUAL(6U, data.size());
      CHECK_EQUAL(6, std::distance(data.begin(), data.end()));

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_push_front_move)
    {
      ItemM p1(1U);
      ItemM p2(2U);
      ItemM p3(3U);
      ItemM p4(4U);

      DataM data;
      data.push_front(std::move(p1));
      data.push_front(std::move(p2));
      data.push_front(std::move(p3));
      data.push_front(std::move(p4));

      CHECK_EQUAL(4U, data.size());

      CHECK(!bool(p1));
      CHECK(!bool(p2));
      CHECK(!bool(p3));
      CHECK(!bool(p4));

      DataM::const_iterator itr = data.begin();

      CHECK_EQUAL(4U, (*itr++).value);
      CHECK_EQUAL(3U, (*itr++).value);
      CHECK_EQUAL(2U, (*itr++).value);
      CHECK_EQUAL(1U, (*itr++).value);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_emplace_front)
    {
      CompareDataNDC compare_data;
      DataNDC data;

      compare_data.emplace_front("1");
      compare_data.emplace_front("2");
      compare_data.emplace_front("3");
      compare_data.emplace_front("4");
      compare_data.emplace_front("5");
      compare_data.emplace_front("6");

      CHECK_NO_THROW(data.emplace_front("1"));
      CHECK_NO_THROW(data.emplace_front("2"));
      CHECK_NO_THROW(data.emplace_front("3"));
      CHECK_NO_THROW(data.emplace_front("4"));
      CHECK_NO_THROW(data.emplace_front("5"));
      CHECK_NO_THROW(data.emplace_front("6"));

      CHECK_EQUAL(6U, data.size());
      CHECK_EQUAL(6, std::distance(data.begin(), data.end()));

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_emplace_front_return)
    {
      DataNDC data;

      data.emplace_front("24");
      auto& front = data.emplace_front("42");
      CHECK_EQUAL(front, data.front());
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_emplace_after)
    {
      CompareDataNDC compare_data;
      DataNDC data;

      CompareDataNDC::iterator itc;

      itc = compare_data.before_begin();
      compare_data.emplace_after(itc, "1");
      compare_data.emplace_after(itc, "2");

      ++itc;
      compare_data.emplace_after(itc, "3");
      compare_data.emplace_after(itc, "4");

      ++itc;
      compare_data.emplace_after(itc, "5");
      compare_data.emplace_after(itc, "6");

      DataNDC::iterator itd;

      itd = data.before_begin();
      CHECK_NO_THROW(data.emplace_after(itd, "1"));
      CHECK_NO_THROW(data.emplace_after(itd, "2"));

      ++itd;
      CHECK_NO_THROW(data.emplace_after(itd, "3"));
      CHECK_NO_THROW(data.emplace_after(itd, "4"));

      ++itd;
      CHECK_NO_THROW(data.emplace_after(itd, "5"));
      CHECK_NO_THROW(data.emplace_after(itd, "6"));

      CHECK_EQUAL(6U, data.size());
      CHECK_EQUAL(6, std::distance(data.begin(), data.end()));

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_front_const)
    {
      const DataNDC data(sorted_data.begin(), sorted_data.end());

      CHECK_EQUAL(ItemNDC("0"), data.front());
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_before_begin_const)
    {
      const DataNDC data(sorted_data.begin(), sorted_data.end());

      DataNDC::const_iterator itr = data.before_begin();
      ++itr;

      are_equal = std::equal(data.begin(), data.end(), itr);

      CHECK(are_equal);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_push_front_excess)
    {
      DataNDC data;

      CHECK_NO_THROW(data.push_front(ItemNDC("0")));
      CHECK_NO_THROW(data.push_front(ItemNDC("1")));
      CHECK_NO_THROW(data.push_front(ItemNDC("2")));
      CHECK_NO_THROW(data.push_front(ItemNDC("3")));
      CHECK_NO_THROW(data.push_front(ItemNDC("4")));
      CHECK_NO_THROW(data.push_front(ItemNDC("5")));
      CHECK_NO_THROW(data.push_front(ItemNDC("6")));
      CHECK_NO_THROW(data.push_front(ItemNDC("7")));
      CHECK_NO_THROW(data.push_front(ItemNDC("8")));
      CHECK_NO_THROW(data.push_front(ItemNDC("9")));

      CHECK_THROW(data.push_front(ItemNDC("10")) , etl::forward_list_full);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_push_front_pop_front)
    {
      DataNDC data;

      for (size_t i = 0UL; i < 2UL * data.max_size(); ++i)
      {
        CHECK_NO_THROW(data.push_front(ItemNDC("1")));
        data.pop_front();
      }

      CHECK(data.empty());
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_pop_front_empty)
    {
      DataNDC data;

      CHECK_NO_THROW(data.push_front(ItemNDC("0")));
      CHECK_NO_THROW(data.push_front(ItemNDC("1")));
      CHECK_NO_THROW(data.push_front(ItemNDC("2")));
      CHECK_NO_THROW(data.push_front(ItemNDC("3")));

      data.pop_front();
      data.pop_front();
      data.pop_front();
      data.pop_front();

      CHECK_THROW(data.pop_front(), etl::forward_list_empty);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_erase_after_single)
    {
      CompareDataNDC compare_data(sorted_data.begin(), sorted_data.end());
      DataNDC data(sorted_data.begin(), sorted_data.end());

      DataNDC::iterator i_data = data.begin();
      std::advance(i_data, 2);

      CompareDataNDC::iterator i_compare_data = compare_data.begin();
      std::advance(i_compare_data, 2);

      i_compare_data = compare_data.erase_after(i_compare_data);
      i_data         = data.erase_after(i_data);

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

      are_equal = std::equal(data.begin(), data.end(), compare_data.begin());
      CHECK(are_equal);
      CHECK(*i_compare_data == *i_data);

      i_compare_data = compare_data.erase_after(compare_data.begin());
      i_data         = data.erase_after(data.begin());

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

      are_equal = *i_data == *i_compare_data;
      CHECK(are_equal);

      // Move to the last value and erase.
      i_compare_data = compare_data.begin();
      //std::advance(i_compare_data, compare_data.size() - 1);
      i_compare_data = compare_data.erase_after(i_compare_data);

      i_data = data.begin();
      //std::advance(i_data, data.size() - 1);
      i_data = data.erase_after(i_data);

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

      are_equal = std::equal(data.begin(), data.end(), compare_data.begin());

      CHECK(are_equal);
      are_equal = *i_data == *i_compare_data;
      CHECK(are_equal);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_erase_after_range)
    {
      CompareDataNDC compare_data(sorted_data.begin(), sorted_data.end());
      DataNDC data(sorted_data.begin(), sorted_data.end());

      DataNDC::iterator i_data_1 = data.begin();
      std::advance(i_data_1, 2);

      DataNDC::iterator i_data_2 = data.begin();
      std::advance(i_data_2, 4);

      CompareDataNDC::iterator i_compare_data_1 = compare_data.begin();
      std::advance(i_compare_data_1, 2);

      CompareDataNDC::iterator i_compare_data_2 = compare_data.begin();
      std::advance(i_compare_data_2, 4);

      CompareDataNDC::iterator i_compare_result = compare_data.erase_after(i_compare_data_1, i_compare_data_2);

      DataNDC::iterator i_result = data.erase_after(i_data_1, i_data_2);

      CHECK_EQUAL(*i_compare_result, *i_result);

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_erase_after_range_end)
    {
      CompareDataNDC compare_data(sorted_data.begin(), sorted_data.end());
      DataNDC data(sorted_data.begin(), sorted_data.end());

      DataNDC::iterator i_data = data.begin();
      std::advance(i_data, 4);

      CompareDataNDC::iterator i_compare_data = compare_data.begin();
      std::advance(i_compare_data, 4);

      compare_data.erase_after(i_compare_data, compare_data.end());

      DataNDC::iterator i_result = data.erase_after(i_data, data.end());

      CHECK(i_result == data.end());

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_erase_after_all)
    {
      DataNDC data(sorted_data.begin(), sorted_data.end());

      data.erase_after(data.before_begin(), data.end());

      CHECK(data.empty());
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_front)
    {
      CompareDataNDC compare_data(sorted_data.begin(), sorted_data.end());
      DataNDC data(sorted_data.begin(), sorted_data.end());

      CHECK_EQUAL(compare_data.front(), data.front());
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_assignment)
    {
      CompareDataNDC compare_data(sorted_data.begin(), sorted_data.end());
      DataNDC data(sorted_data.begin(), sorted_data.end());
      DataNDC other_data;

      other_data = data;

      CHECK_EQUAL(data.size(), other_data.size());

      are_equal = std::equal(data.begin(), data.end(), other_data.begin());
      CHECK(are_equal);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_assignment_interface)
    {
      DataNDC data1(sorted_data.begin(), sorted_data.end());
      DataNDC data2;

      IDataNDC& idata1 = data1;
      IDataNDC& idata2 = data2;

      idata2 = idata1;

      bool isEqual = std::equal(data1.begin(), data1.end(), data2.begin());
      CHECK(isEqual);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_self_assignment)
    {
      CompareDataNDC compare_data(sorted_data.begin(), sorted_data.end());
      DataNDC data(sorted_data.begin(), sorted_data.end());
      DataNDC other_data(data);

#include "etl/private/diagnostic_self_assign_overloaded_push.h" 
      other_data = other_data;
#include "etl/private/diagnostic_pop.h" 

      CHECK_EQUAL(data.size(), other_data.size());

      are_equal = std::equal(data.begin(), data.end(), other_data.begin());
      CHECK(are_equal);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_unique_empty)
    {
      CompareDataNDC compare_data;
      DataNDC data;

      compare_data.unique();
      data.unique();

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_unique)
    {
      CompareDataNDC compare_data(non_unique_data.begin(), non_unique_data.end());
      DataNDC data(non_unique_data.begin(), non_unique_data.end());

      compare_data.unique();
      data.unique();

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_remove)
    {
      CompareDataNDC compare_data(sorted_data.begin(), sorted_data.end());
      DataNDC data(sorted_data.begin(), sorted_data.end());

      compare_data.remove(ItemNDC("7"));
      data.remove(ItemNDC("7"));

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_remove_if)
    {
      CompareDataNDC compare_data(sorted_data.begin(), sorted_data.end());
      DataNDC data(sorted_data.begin(), sorted_data.end());

      compare_data.remove_if(std::bind(std::equal_to<ItemNDC>(), std::placeholders::_1, ItemNDC("7")));
      data.remove_if(std::bind(std::equal_to<ItemNDC>(), std::placeholders::_1, ItemNDC("7")));

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_reverse)
    {
      CompareDataNDC compare_data(sorted_data.begin(), sorted_data.end());
      DataNDC data(sorted_data.begin(), sorted_data.end());

      compare_data.reverse();
      data.reverse();

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());
      CHECK_EQUAL(data.size(), size_t(std::distance(data.begin(), data.end())));

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_reverse_empty)
    {
      CompareDataNDC compare_data;
      DataNDC data;

      compare_data.reverse();
      data.reverse();

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

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_sort)
    {
      CompareDataNDC compare_data(unsorted_data.begin(), unsorted_data.end());
      DataNDC data(unsorted_data.begin(), unsorted_data.end());

      compare_data.sort();
      data.sort();

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_stable_sort)
    {
      std::list<ItemNDC> compare_data(stable_sort_data.begin(), stable_sort_data.end());
      DataNDC data(stable_sort_data.begin(), stable_sort_data.end());

      compare_data.sort();
      data.sort();

      std::list<ItemNDC>::const_iterator citr = compare_data.begin();
      DataNDC::const_iterator        ditr = data.begin();

      while (ditr != data.end())
      {
        CHECK_EQUAL(citr->index, ditr->index);

        ++citr;
        ++ditr;
      }
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_sort_empty)
    {
      CompareDataNDC compare_data;
      DataNDC data;

      compare_data.sort();
      data.sort();

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_move)
    {
      CompareDataNDC compare_data(sorted_data.begin(), sorted_data.end());
      DataNDC data(sorted_data.begin(), sorted_data.end());

      DataNDC::const_iterator i_from_before;
      DataNDC::const_iterator i_to_before;
      CompareDataNDC::const_iterator i_compare_from_before;
      CompareDataNDC::const_iterator i_compare_to_before;

      // Move to the beginning.
      i_from_before = data.begin();
      std::advance(i_from_before, 5);

      i_to_before = data.before_begin();

      i_compare_from_before = compare_data.begin();
      std::advance(i_compare_from_before, 5);

      i_compare_to_before = compare_data.before_begin();

      compare_data.splice_after(i_compare_to_before, compare_data, i_compare_from_before);
      data.move_after(i_from_before, i_to_before);

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

      // Move to the end.
      i_from_before = data.begin();
      std::advance(i_from_before, 5);

      i_to_before = data.begin();
      std::advance(i_to_before, 9);

      i_compare_from_before = compare_data.begin();
      std::advance(i_compare_from_before, 5);

      i_compare_to_before = compare_data.begin();
      std::advance(i_compare_to_before, 9);

      compare_data.splice_after(i_compare_to_before, compare_data, i_compare_from_before);
      data.move_after(i_from_before, i_to_before);

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

      // Move to nearby.
      i_from_before = data.begin();
      std::advance(i_from_before, 3);

      i_to_before = data.begin();
      std::advance(i_to_before, 7);

      i_compare_from_before = compare_data.begin();
      std::advance(i_compare_from_before, 3);

      i_compare_to_before = compare_data.begin();
      std::advance(i_compare_to_before, 7);

      compare_data.splice_after(i_compare_to_before, compare_data, i_compare_from_before);
      data.move_after(i_from_before, i_to_before);

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

      // Move to same.
      i_from_before = data.begin();
      std::advance(i_from_before, 3);

      i_to_before = data.begin();
      std::advance(i_to_before, 3);

      i_compare_from_before = compare_data.begin();
      std::advance(i_compare_from_before, 3);

      i_compare_to_before = compare_data.begin();
      std::advance(i_compare_to_before, 3);

      compare_data.splice_after(i_compare_to_before, compare_data, i_compare_from_before);
      data.move_after(i_from_before, i_to_before);

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_move_range)
    {
      CompareDataNDC compare_data(sorted_data.begin(), sorted_data.end());
      DataNDC data(sorted_data.begin(), sorted_data.end());

      DataNDC::const_iterator i_first_before;
      DataNDC::const_iterator i_last;
      DataNDC::const_iterator i_to_before;
      CompareDataNDC::const_iterator i_compare_first_before;
      CompareDataNDC::const_iterator i_compare_last;
      CompareDataNDC::const_iterator i_compare_to_before;

      // Move to the beginning.
      i_first_before = data.begin();
      std::advance(i_first_before, 4);

      i_last = i_first_before;
      std::advance(i_last, 4);

      i_to_before = data.before_begin();

      i_compare_first_before = compare_data.begin();
      std::advance(i_compare_first_before, 4);

      i_compare_last = i_compare_first_before;
      std::advance(i_compare_last, 4);

      i_compare_to_before = compare_data.before_begin();

      compare_data.splice_after(i_compare_to_before, compare_data, i_compare_first_before, i_compare_last);
      data.move_after(i_first_before, i_last, i_to_before);

      CHECK_EQUAL(size_t(std::distance(compare_data.begin(), compare_data.end())), data.size());

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

      // Move to the end.
      i_first_before = data.begin();
      std::advance(i_first_before, 4);

      i_last = i_first_before;
      std::advance(i_last, 4);

      i_to_before = data.begin();
      std::advance(i_to_before, 9);

      i_compare_first_before = compare_data.begin();
      std::advance(i_compare_first_before, 4);

      i_compare_last = i_compare_first_before;
      std::advance(i_compare_last, 4);

      i_compare_to_before = compare_data.begin();
      std::advance(i_compare_to_before, 9);

      compare_data.splice_after(i_compare_to_before, compare_data, i_compare_first_before, i_compare_last);
      data.move_after(i_first_before, i_last, i_to_before);

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

      // Move to nearby.
      i_first_before = data.begin();
      std::advance(i_first_before, 4);

      i_last = i_first_before;
      std::advance(i_last, 4);

      i_to_before = data.begin();
      std::advance(i_to_before, 2);

      i_compare_first_before = compare_data.begin();
      std::advance(i_compare_first_before, 4);

      i_compare_last = i_compare_first_before;
      std::advance(i_compare_last, 4);

      i_compare_to_before = compare_data.begin();
      std::advance(i_compare_to_before, 2);

      compare_data.splice_after(i_compare_to_before, compare_data, i_compare_first_before, i_compare_last);
      data.move_after(i_first_before, i_last, i_to_before);

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

      // Move to same.
      i_first_before = data.begin();
      std::advance(i_first_before, 4);

      i_last = i_first_before;
      std::advance(i_last, 4);

      i_to_before = data.begin();
      std::advance(i_to_before, 4);

      i_compare_first_before = compare_data.begin();
      std::advance(i_compare_first_before, 4);

      i_compare_last = i_compare_first_before;
      std::advance(i_compare_last, 4);

      i_compare_to_before = compare_data.begin();
      std::advance(i_compare_to_before, 4);

      compare_data.splice_after(i_compare_to_before, compare_data, i_compare_first_before, i_compare_last);
      data.move_after(i_first_before, i_last, i_to_before);

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

      // Move to illegal place.
      i_first_before = data.begin();
      std::advance(i_first_before, 2);
      i_last = i_first_before;
      std::advance(i_last, 3);
      i_to_before = i_first_before;
      std::advance(i_to_before, 2);

      CHECK_THROW(data.move_after(i_first_before, i_last, i_to_before), etl::forward_list_iterator);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_binary_comparisons)
    {
      DataNDC data1(sorted_data.begin(), sorted_data.end());
      DataNDC data2(sorted_data.begin(), sorted_data.end());
      DataNDC data3(unsorted_data.begin(), unsorted_data.end());

      CHECK(data1 == data2);
      CHECK(data1 != data3);
      CHECK(data1 < data3);
      CHECK(data3 > data1);
    }

    //*************************************************************************
    TEST(test_two_parameter_same_type_non_iterator)
    {
      // No compile error.
      etl::forward_list<int, 10> fl(10, 1);
      CHECK(fl.size() == 10);
      fl.assign(5, 2);
      CHECK(fl.size() == 5);
      fl.insert_after(fl.before_begin(), 5, 3);
      CHECK(fl.size() == fl.max_size());
    }
    
    //*************************************************************************
#if ETL_USING_CPP17 && ETL_HAS_INITIALIZER_LIST && !defined(ETL_TEMPLATE_DEDUCTION_GUIDE_TESTS_DISABLED)
    TEST(test_forward_list_template_deduction)
    {
      etl::forward_list data{ ItemNDC("A"), ItemNDC("B"), ItemNDC("C"), ItemNDC("D"), ItemNDC("E"), ItemNDC("F") };

      auto v = *data.begin();
      using Type = decltype(v);
      CHECK((std::is_same_v<ItemNDC, Type>));

      decltype(data)::const_iterator itr = data.begin();

      CHECK_EQUAL(ItemNDC("A"), *itr++);
      CHECK_EQUAL(ItemNDC("B"), *itr++);
      CHECK_EQUAL(ItemNDC("C"), *itr++);
      CHECK_EQUAL(ItemNDC("D"), *itr++);
      CHECK_EQUAL(ItemNDC("E"), *itr++);
      CHECK_EQUAL(ItemNDC("F"), *itr++);
    }
#endif

    //*************************************************************************
#if ETL_HAS_INITIALIZER_LIST
    TEST(test_make_forward_list)
    {
      auto data = etl::make_forward_list<ItemNDC>(ItemNDC("A"), ItemNDC("B"), ItemNDC("C"), ItemNDC("D"), ItemNDC("E"), ItemNDC("F"));

      auto v = *data.begin();
      using Type = decltype(v);
      CHECK((std::is_same_v<ItemNDC, Type>));

      decltype(data)::const_iterator itr = data.begin();

      CHECK_EQUAL(ItemNDC("A"), *itr++);
      CHECK_EQUAL(ItemNDC("B"), *itr++);
      CHECK_EQUAL(ItemNDC("C"), *itr++);
      CHECK_EQUAL(ItemNDC("D"), *itr++);
      CHECK_EQUAL(ItemNDC("E"), *itr++);
      CHECK_EQUAL(ItemNDC("F"), *itr++);
    }
#endif
  };
}