etl/test/test_array.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
of this software and associated documentation files(the "Software"), to deal
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The above copyright notice and this permission notice shall be included in all
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
******************************************************************************/

#include "unit_test_framework.h"

#include "data.h"

#include "etl/array.h"

#include <array>
#include <algorithm>
#include <iterator>
#include <type_traits>

#include "etl/integral_limits.h"

namespace
{
  using Moveable = TestDataM<int>;

  SUITE(test_array)
  {
    static const size_t SIZE = 10UL;

    using Data         = etl::array<int, SIZE>;
    using Compare_Data = std::array<int, SIZE>;

    using ZeroData     = etl::array<int, 0>;

    Compare_Data compare_data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
    Compare_Data swap_data    = { 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 };

    //*************************************************************************
    TEST(test_constructor)
    {
      Data data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

      CHECK_EQUAL(data.size(), size_t(SIZE));
      CHECK_EQUAL(data.max_size(), SIZE);
    }

    //*************************************************************************
    TEST(test_constructor_zero_sized_array)
    {
      ZeroData data;

      CHECK_TRUE(data.empty());
      CHECK_EQUAL(data.size(), size_t(0));
      CHECK_EQUAL(data.max_size(), 0);
    }

#if ETL_USING_CPP17 && ETL_HAS_INITIALIZER_LIST && !defined(ETL_TEMPLATE_DEDUCTION_GUIDE_TESTS_DISABLED)
    //*************************************************************************
    TEST(test_cpp17_deduced_constructor)
    {
      etl::array data{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
      Data compare = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

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

    //*************************************************************************
    TEST(test_assignment)
    {
      Data data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
      Data other_data;

      other_data = data;

      bool isEqual = std::equal(data.begin(), data.end(), other_data.begin());

      CHECK(isEqual);
    }

    //*************************************************************************
    TEST(test_at)
    {
      Data data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

      for (size_t i = 0UL; i < data.size(); ++i)
      {
        CHECK_EQUAL(data.at(i), compare_data.at(i));
      }

      CHECK_THROW({ int d = data.at(data.size()); (void)d; }, etl::array_out_of_range);
    }

    //*************************************************************************
    TEST(test_at_const)
    {
      Data data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

      for (size_t i = 0UL; i < data.size(); ++i)
      {
        CHECK_EQUAL(data.at(i), compare_data.at(i));
      }

      CHECK_THROW({ int d = data.at(data.size()); (void)d; }, etl::array_out_of_range);
    }

    //*************************************************************************
    TEST(test_index_operator)
    {
      Data data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

      for (size_t i = 0UL; i < data.size(); ++i)
      {
        CHECK_EQUAL(data[i], compare_data[i]);
      }

      CHECK_THROW({ int d = data[data.size()]; (void)d; }, etl::array_out_of_range);
    }

    //*************************************************************************
    TEST(test_index_operator_const)
    {
      Data data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

      for (size_t i = 0UL; i < data.size(); ++i)
      {
        CHECK_EQUAL(data[i], compare_data[i]);
      }

      CHECK_THROW({ int d = data[data.size()]; (void)d; }, etl::array_out_of_range);
    }

    //*************************************************************************
    TEST(test_front)
    {
      Data data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

      int& ref = data.front();
      CHECK(ref == compare_data.front());

      ++ref;
      CHECK(ref == compare_data.front() + 1);
    }

    //*************************************************************************
    TEST(test_front_const)
    {
      Data data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

      const int& ref = data.front();
      CHECK(ref == compare_data.front());
    }

    //*************************************************************************
    TEST(test_back)
    {
      Data data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

      int& ref = data.back();
      CHECK(ref == compare_data.back());

      ++ref;
      CHECK(ref == compare_data.back() + 1);
    }

    //*************************************************************************
    TEST(test_back_const)
    {
      Data data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

      const int& ref = data.back();
      CHECK(ref == compare_data.back());
    }

    //*************************************************************************
    TEST(test_data)
    {
      Data data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

      bool isEqual = std::equal(data.begin(), data.end(), data.data());

      CHECK(isEqual);
    }

    //*************************************************************************
    TEST(test_data_const)
    {
      const Data data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

      bool isEqual = std::equal(data.begin(), data.end(), data.data());

      CHECK(isEqual);
    }

    //*************************************************************************
    TEST(test_begin)
    {
      Data data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

      CHECK_EQUAL(data.begin(), &data[0]);
    }

    //*************************************************************************
    TEST(test_end)
    {
      Data data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

      CHECK_EQUAL(data.end(), data.data() + SIZE);
    }

    //*************************************************************************
    TEST(test_cbegin)
    {
      const Data data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

      CHECK_EQUAL(data.cbegin(), data.data());
    }

    //*************************************************************************
    TEST(test_cend)
    {
      const Data data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

      CHECK_EQUAL(data.cend(), data.data() + SIZE);
    }

    //*************************************************************************
    TEST(test_rbegin)
    {
      Data data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

      CHECK(data.rbegin() == Data::reverse_iterator(data.data() + SIZE));
    }

    //*************************************************************************
    TEST(test_rend)
    {
      Data data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

      CHECK(data.rend() == Data::reverse_iterator(&data[0]));
    }

    //*************************************************************************
    TEST(test_crbegin)
    {
      const Data data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

      CHECK(data.crbegin() == Data::const_reverse_iterator(data.data() + SIZE));
    }

    //*************************************************************************
    TEST(test_crend)
    {
      const Data data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

      CHECK(data.crend() == Data::const_reverse_iterator(&data[0]));
    }

    //*************************************************************************
    TEST(test_iterator)
    {
      Data data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

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

      CHECK(isEqual);
    }

    //*************************************************************************
    TEST(test_const_iterator)
    {
      Data data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

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

      CHECK(isEqual);
    }

    //*************************************************************************
    TEST(test_reverse_iterator)
    {
      Data data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

      bool isEqual = std::equal(data.rbegin(), data.rend(), compare_data.rbegin());

      CHECK(isEqual);
    }

    //*************************************************************************
    TEST(test_const_reverse_iterator)
    {
      Data data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

      bool isEqual = std::equal(data.crbegin(), data.crend(), compare_data.crbegin());

      CHECK(isEqual);
    }

    //*************************************************************************
    TEST(test_empty)
    {
      Data data = { 0 };

      CHECK(!data.empty());
    }

    //*************************************************************************
    TEST(test_size)
    {
      Data data = { 0 };

      CHECK_EQUAL(SIZE, data.size());
    }

    //*************************************************************************
    TEST(test_max_size)
    {
      Data data = { 0 };

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


    //*************************************************************************
    TEST(test_fill)
    {
      Data data = { 0 };
      data.fill(1);

      Compare_Data compare;
      compare.fill(1);

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

      CHECK(isEqual);
    }

    //*************************************************************************
    TEST(test_swap)
    {
      Data data1 = { 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 };
      Data data2 = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

      swap(data1, data2);

      CHECK(std::equal(compare_data.begin(), compare_data.end(), data1.begin()));
      CHECK(std::equal(swap_data.begin(), swap_data.end(), data2.begin()));
    }

    //*************************************************************************
    TEST(test_get)
    {
      Data data1       = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
      const Data data2 = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

      CHECK_EQUAL(data1[3], etl::get<3>(data1));
      CHECK_EQUAL(data2[3], etl::get<3>(data2));

      // The following line should fail with a compile error.
      //int i = etl::get<11>(data2);
    }

    //*************************************************************************
    TEST(test_assign)
    {
      int initial[] = { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 };
      int source[]  = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 };
      int check1[]  = { 0, 1, 2, 3, 4, -1, -1, -1, -1, -1 };
      int check2[]  = { 0, 1, 2, 3, 4, 99, 99, 99, 99, 99 };

      Data data = { 0 };

      Data::iterator result;

      // Initial data.
      result = data.assign(std::begin(initial), std::end(initial));
      CHECK(result == data.end());
      bool isEqual = std::equal(data.begin(), data.end(), std::begin(initial));
      CHECK(isEqual);

      // Assign smaller.
      result = data.assign(std::begin(initial), std::end(initial));
      CHECK(result == data.end());
      result = data.assign(&source[0], &source[5]);
      CHECK(result == &data[5]);
      isEqual = std::equal(data.begin(), data.end(), std::begin(check1));
      CHECK(isEqual);

      // Assign smaller + default.
      result = data.assign(std::begin(initial), std::end(initial));
      CHECK(result == data.end());
      result = data.assign(&source[0], &source[5], 99);
      CHECK(result == &data[5]);
      isEqual = std::equal(data.begin(), data.end(), std::begin(check2));
      CHECK(isEqual);
    }

    //*************************************************************************
    TEST(test_insert_value)
    {
      int initial[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
      int check1[]  = { 99, 0, 1, 2, 3, 4, 5, 6, 7, 8 };
      int check2[]  = { 0, 1, 2, 3, 4, 99, 5, 6, 7, 8 };
      int check3[]  = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 99 };

      Data data = { 0 };
      Data::iterator result;

      // Insert beginning.
      data.assign(std::begin(initial), std::end(initial));
      result = data.insert_at(0, 99);
      CHECK_EQUAL(data[0], *result);
      bool isEqual = std::equal(data.begin(), data.end(), std::begin(check1));
      CHECK(isEqual);

      // Insert middle.
      data.assign(std::begin(initial), std::end(initial));
      result = data.insert_at(5, 99);
      CHECK_EQUAL(data[5], *result);
      isEqual = std::equal(data.begin(), data.end(), std::begin(check2));
      CHECK(isEqual);

      // Insert end.
      data.assign(std::begin(initial), std::end(initial));
      result = data.insert_at(9, 99);
      CHECK_EQUAL(data[9], *result);
      isEqual = std::equal(data.begin(), data.end(), std::begin(check3));
      CHECK(isEqual);

      // Insert out of range
      CHECK_THROW({ result = data.insert_at(data.size(), 99); }, etl::array_out_of_range);
    }

    //*************************************************************************
    TEST(test_insert_range)
    {
      int source1[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 };
      int source2[] = { 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 };
      int check1[]  = { 12, 11, 10, 0, 1, 2, 3, 4, 5, 6 };
      int check2[]  = { 0, 1, 2, 3, 12, 11, 10, 4, 5, 6 };
      int check3[]  = { 0, 1, 2, 3, 4, 5, 6, 12, 11, 10 };
      int check4[]  = { 12, 11, 10, 9, 8, 7, 6, 5, 4, 3 };
      int check5[]  = { 0, 1, 2, 3, 12, 11, 10, 9, 8, 7, 6 };

      Data data = { 0 };
      Data::iterator result;

      // Insert smaller, beginning.
      data.assign(std::begin(source1), std::end(source1));
      result = data.insert_at(0, &source2[0], &source2[3]);
      CHECK_EQUAL(data[0], *result);
      bool isEqual = std::equal(data.begin(), data.end(), std::begin(check1));
      CHECK(isEqual);

      // Insert smaller, middle.
      data.assign(std::begin(source1), std::end(source1));
      result = data.insert_at(4, &source2[0], &source2[3]);
      CHECK_EQUAL(data[4], *result);
      isEqual = std::equal(data.begin(), data.end(), std::begin(check2));
      CHECK(isEqual);

      // Insert smaller, end.
      data.assign(std::begin(source1), std::end(source1));
      result = data.insert_at(7, &source2[0], &source2[3]);
      CHECK_EQUAL(data[7], *result);
      isEqual = std::equal(data.begin(), data.end(), std::begin(check3));
      CHECK(isEqual);

      // Insert larger, beginning.
      data.assign(std::begin(source1), std::end(source1));
      result = data.insert_at(0, &source2[0], &source2[13]);
      CHECK_EQUAL(data[0], *result);
      isEqual = std::equal(data.begin(), data.end(), std::begin(check4));
      CHECK(isEqual);

      // Insert larger, middle.
      data.assign(std::begin(source1), std::end(source1));
      result = data.insert_at(4, &source2[0], &source2[13]);
      CHECK_EQUAL(data[4], *result);
      isEqual = std::equal(data.begin(), data.end(), std::begin(check5));
      CHECK(isEqual);

      // Insert out of range
      CHECK_THROW({ result = data.insert_at(data.size(), &source2[0], &source2[13]); }, etl::array_out_of_range);
    }

    //*************************************************************************
    TEST(test_erase_single)
    {
      int initial[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
      int check1a[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 9 };
      int check1b[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 99 };
      int check2a[] = { 0, 1, 2, 3, 4, 6, 7, 8, 9, 9 };
      int check2b[] = { 0, 1, 2, 3, 4, 6, 7, 8, 9, 99 };
      int check3a[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
      int check3b[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 99 };

      Data data = { 0 };
      Data::iterator result;

      // Erase beginning.
      data.assign(std::begin(initial), std::end(initial));
      result = data.erase_at(0);
      CHECK_EQUAL(data[0], *result);
      bool isEqual = std::equal(data.begin(), data.end(), std::begin(check1a));
      CHECK(isEqual);

      data.assign(std::begin(initial), std::end(initial));
      result = data.erase_at(0, 99);
      CHECK_EQUAL(data[0], *result);
      isEqual = std::equal(data.begin(), data.end(), std::begin(check1b));
      CHECK(isEqual);

      // Erase middle.
      data.assign(std::begin(initial), std::end(initial));
      result = data.erase_at(5);
      CHECK_EQUAL(data[5], *result);
      isEqual = std::equal(data.begin(), data.end(), std::begin(check2a));
      CHECK(isEqual);

      data.assign(std::begin(initial), std::end(initial));
      result = data.erase_at(5, 99);
      CHECK_EQUAL(data[5], *result);
      isEqual = std::equal(data.begin(), data.end(), std::begin(check2b));
      CHECK(isEqual);

      // Erase last.
      data.assign(std::begin(initial), std::end(initial));
      result = data.erase_at(9);
      CHECK_EQUAL(data[9], *result);
      isEqual = std::equal(data.begin(), data.end(), std::begin(check3a));
      CHECK(isEqual);

      data.assign(std::begin(initial), std::end(initial));
      result = data.erase_at(9, 99);
      CHECK_EQUAL(data[9], *result);
      isEqual = std::equal(data.begin(), data.end(), std::begin(check3b));
      CHECK(isEqual);

      // Erase out of range
      CHECK_THROW({ result = data.erase_at(data.size()); }, etl::array_out_of_range);
    }

    //*************************************************************************
    TEST(test_erase_range)
    {
      int initial[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
      int check1a[] = { 5, 6, 7, 8, 9, 5, 6, 7, 8, 9 };
      int check1b[] = { 5, 6, 7, 8, 9, 99, 99, 99, 99, 99 };
      int check2a[] = { 0, 1, 7, 8, 9, 5, 6, 7, 8, 9 };
      int check2b[] = { 0, 1, 7, 8, 9, 99, 99, 99, 99, 99 };
      int check3a[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
      int check3b[] = { 0, 1, 2, 3, 4, 99, 99, 99, 99, 99 };

      Data data = { 0 };
      Data::iterator result;

      // Erase beginning.
      data.assign(std::begin(initial), std::end(initial));
      result = data.erase_range(0, 5);
      CHECK_EQUAL(data[0], *result);
      bool isEqual = std::equal(data.begin(), data.end(), std::begin(check1a));
      CHECK(isEqual);

      data.assign(std::begin(initial), std::end(initial));
      result = data.erase_range(0, 5, 99);
      CHECK_EQUAL(data[0], *result);
      isEqual = std::equal(data.begin(), data.end(), std::begin(check1b));
      CHECK(isEqual);

      // Erase middle.
      data.assign(std::begin(initial), std::end(initial));
      result = data.erase_range(2, 7);
      CHECK_EQUAL(data[2], *result);
      isEqual = std::equal(data.begin(), data.end(), std::begin(check2a));
      CHECK(isEqual);

      data.assign(std::begin(initial), std::end(initial));
      result = data.erase_range(2, 7, 99);
      CHECK_EQUAL(data[2], *result);
      isEqual = std::equal(data.begin(), data.end(), std::begin(check2b));
      CHECK(isEqual);

      // Erase last.
      data.assign(std::begin(initial), std::end(initial));
      result = data.erase_range(5, 10);
      CHECK_EQUAL(data[5], *result);
      isEqual = std::equal(data.begin(), data.end(), std::begin(check3a));
      CHECK(isEqual);

      data.assign(std::begin(initial), std::end(initial));
      result = data.erase_range(5, 10, 99);
      CHECK_EQUAL(data[5], *result);
      isEqual = std::equal(data.begin(), data.end(), std::begin(check3b));
      CHECK(isEqual);

      // first is greater than last
      CHECK_THROW({ result = data.erase_range(6, 5, 99); }, etl::array_out_of_range);

      // Erase out of range
      CHECK_THROW({ result = data.erase_range(5, data.size() + 1, 99); }, etl::array_out_of_range);
    }

    //*************************************************************************
    TEST(test_equal)
    {
      Data data1 = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
      Data data2 = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

      CHECK(data1 == data2);
    }

    //*************************************************************************
    TEST(test_not_equal)
    {
      Data data1 = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
      Data data2 = { 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 };

      CHECK(data1 != data2);
    }

    //*************************************************************************
    TEST(test_less_than)
    {
      Data data    = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
      Data greater = { 0, 1, 2, 3, 5, 5, 6, 7, 8, 9 };
      Data lesser  = { 0, 1, 2, 3, 4, 4, 6, 7, 8, 9 };

      CHECK(lesser    < data);
      CHECK(!(data    < data));
      CHECK(!(greater < data));
    }

    //*************************************************************************
    TEST(test_less_than_equal)
    {
      Data data    = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
      Data greater = { 0, 1, 2, 3, 5, 5, 6, 7, 8, 9 };
      Data lesser  = { 0, 1, 2, 3, 4, 4, 6, 7, 8, 9 };

      CHECK(lesser    <= data);
      CHECK(data      <= data);
      CHECK(!(greater <= data));
    }

    //*************************************************************************
    TEST(test_greater_than)
    {
      Data data    = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
      Data greater = { 0, 1, 2, 3, 5, 5, 6, 7, 8, 9 };
      Data lesser  = { 0, 1, 2, 3, 4, 4, 6, 7, 8, 9 };

      CHECK(greater  > data);
      CHECK(!(data   > data));
      CHECK(!(lesser > data));
    }

    //*************************************************************************
    TEST(test_greater_than_equal)
    {
      Data data    = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
      Data greater = { 0, 1, 2, 3, 5, 5, 6, 7, 8, 9 };
      Data lesser  = { 0, 1, 2, 3, 4, 4, 6, 7, 8, 9 };

      CHECK(greater  >= data);
      CHECK(data     >= data);
      CHECK(!(lesser >= data));
    }

    //*************************************************************************
#if ETL_USING_CPP17 && ETL_HAS_INITIALIZER_LIST && !defined(ETL_TEMPLATE_DEDUCTION_GUIDE_TESTS_DISABLED)
    TEST(test_array_template_deduction)
    {
      etl::array data{ char(0), short(1), 2, long(3), 4, 5, 6, 7, 8, 9 };

      using Type = std::remove_reference_t<decltype(data[0])>;
      CHECK((std::is_same_v<long, Type>));

      CHECK_EQUAL(0, data[0]);
      CHECK_EQUAL(1, data[1]);
      CHECK_EQUAL(2, data[2]);
      CHECK_EQUAL(3, data[3]);
      CHECK_EQUAL(4, data[4]);
      CHECK_EQUAL(5, data[5]);
      CHECK_EQUAL(6, data[6]);
      CHECK_EQUAL(7, data[7]);
      CHECK_EQUAL(8, data[8]);
      CHECK_EQUAL(9, data[9]);
    }
#endif

    //*************************************************************************
#if ETL_USING_CPP17 && ETL_HAS_INITIALIZER_LIST
    TEST(test_array_template_deduction_for_movable)
    {
      etl::array data{ Moveable(0), Moveable(1), Moveable(2), Moveable(3), Moveable(4), Moveable(5), Moveable(6), Moveable(7), Moveable(8), Moveable(9) };

      using Type = std::remove_reference_t<decltype(data[0])>;
      CHECK((std::is_same_v<Moveable, Type>));

      CHECK_EQUAL(Moveable(0), data[0]);
      CHECK_EQUAL(Moveable(1), data[1]);
      CHECK_EQUAL(Moveable(2), data[2]);
      CHECK_EQUAL(Moveable(3), data[3]);
      CHECK_EQUAL(Moveable(4), data[4]);
      CHECK_EQUAL(Moveable(5), data[5]);
      CHECK_EQUAL(Moveable(6), data[6]);
      CHECK_EQUAL(Moveable(7), data[7]);
      CHECK_EQUAL(Moveable(8), data[8]);
      CHECK_EQUAL(Moveable(9), data[9]);
    }
#endif

    //*************************************************************************
#if ETL_HAS_INITIALIZER_LIST
    TEST(test_make_array)
    {
      auto data = etl::make_array<char>(0, 1, 2, 3, 4, 5, 6, 7, 8, 9);

      using Type = etl::remove_reference_t<decltype(data[0])>;
      CHECK((std::is_same<char, Type>::value));

      CHECK_EQUAL(0, data[0]);
      CHECK_EQUAL(1, data[1]);
      CHECK_EQUAL(2, data[2]);
      CHECK_EQUAL(3, data[3]);
      CHECK_EQUAL(4, data[4]);
      CHECK_EQUAL(5, data[5]);
      CHECK_EQUAL(6, data[6]);
      CHECK_EQUAL(7, data[7]);
      CHECK_EQUAL(8, data[8]);
      CHECK_EQUAL(9, data[9]);
    }
#endif

    //*************************************************************************
#if ETL_HAS_INITIALIZER_LIST
    TEST(test_make_array_for_movable)
    {
      auto data = etl::make_array<Moveable>(Moveable(0), Moveable(1), Moveable(2), Moveable(3), Moveable(4), Moveable(5), Moveable(6), Moveable(7), Moveable(8), Moveable(9));

      using Type = etl::remove_reference_t<decltype(data[0])>;
      CHECK((std::is_same<Moveable, Type>::value));

      CHECK_EQUAL(Moveable(0), data[0]);
      CHECK_EQUAL(Moveable(1), data[1]);
      CHECK_EQUAL(Moveable(2), data[2]);
      CHECK_EQUAL(Moveable(3), data[3]);
      CHECK_EQUAL(Moveable(4), data[4]);
      CHECK_EQUAL(Moveable(5), data[5]);
      CHECK_EQUAL(Moveable(6), data[6]);
      CHECK_EQUAL(Moveable(7), data[7]);
      CHECK_EQUAL(Moveable(8), data[8]);
      CHECK_EQUAL(Moveable(9), data[9]);
    }
#endif

#if ETL_USING_CPP14
    //*************************************************************************
    using Array = etl::array<int, 10U>;

    //*********************************
    constexpr int BeginEnd(const Array& data) noexcept
    {
      return *(data.begin() + 5);
    }

    //*********************************
    constexpr int CBeginCEnd(const Array& data) noexcept
    {
      return *(data.cbegin() + 5);
    }

#if ETL_USING_CPP20 && ETL_USING_STL
    //*********************************
    constexpr int RBeginREnd(const Array& data) noexcept
    {
      return *(data.rbegin() + 5);
    }

    //*********************************
    constexpr int CRBeginCREnd(const Array& data) noexcept
    {
      return *(data.crbegin() + 5);
    }
#endif

    //*********************************
    constexpr int DataSize(const Array& data) noexcept
    {
      return *(data.data() + 5);
    }

    //*********************************
    constexpr Array Fill(int i) noexcept
    {
      Array a{};

      a.fill(i);

      return a;
    }

    //*********************************
#if ETL_USING_CPP20 && ETL_USING_STL
    constexpr Array Swap(Array data1, Array data2) noexcept
    {
      data1.swap(data2);

      return data1;
    }
#endif

    TEST(test_cpp14_constexpr)
    {
      constexpr Array data{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
      
      // [] operator
      constexpr int i0 = data[0];
      constexpr int i1 = data[1];
      constexpr int i2 = data[2];
      constexpr int i3 = data[3];
      constexpr int i4 = data[4];
      constexpr int i5 = data[5];
      constexpr int i6 = data[6];
      constexpr int i7 = data[7];
      constexpr int i8 = data[8];
      constexpr int i9 = data[9];
      CHECK_EQUAL(data[0], i0);
      CHECK_EQUAL(data[1], i1);
      CHECK_EQUAL(data[2], i2);
      CHECK_EQUAL(data[3], i3);
      CHECK_EQUAL(data[4], i4);
      CHECK_EQUAL(data[5], i5);
      CHECK_EQUAL(data[6], i6);
      CHECK_EQUAL(data[7], i7);
      CHECK_EQUAL(data[8], i8);
      CHECK_EQUAL(data[9], i9);

      // front & back
      constexpr int f0 = data.front();
      constexpr int b9 = data.back();
      CHECK_EQUAL(data[0], f0);
      CHECK_EQUAL(data[9], b9);

      // begin & end
      constexpr int b5 = BeginEnd(data);
      CHECK_EQUAL(data[5], b5);

      // cbegin & cend
      constexpr int cb5 = CBeginCEnd(data);
      CHECK_EQUAL(data[5], cb5);

#if ETL_USING_CPP20 && ETL_USING_STL
      // rbegin & rend
      constexpr int rb5 = RBeginREnd(data);
      CHECK_EQUAL(data[4], rb5);

      // crbegin & crend
      constexpr int crb5 = CRBeginCREnd(data);
      CHECK_EQUAL(data[4], crb5);
#endif

      // data
      constexpr int d5 = DataSize(data);
      CHECK_EQUAL(data[5], d5);

      // empty
      constexpr bool e = data.empty();
      CHECK_FALSE(e);

      // size
      constexpr size_t s = data.size();
      CHECK_EQUAL(data.size(), s);

      // max_size
      constexpr size_t ms = data.max_size();
      CHECK_EQUAL(data.max_size(), ms);

      // fill
      constexpr Array a = Fill(5);
      CHECK_EQUAL(5, a[0]);
      CHECK_EQUAL(5, a[1]);
      CHECK_EQUAL(5, a[2]);
      CHECK_EQUAL(5, a[3]);
      CHECK_EQUAL(5, a[4]);
      CHECK_EQUAL(5, a[5]);
      CHECK_EQUAL(5, a[6]);
      CHECK_EQUAL(5, a[7]);
      CHECK_EQUAL(5, a[8]);
      CHECK_EQUAL(5, a[9]);

#if ETL_USING_CPP20 && ETL_USING_STL
      // swap
      constexpr Array data1{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
      constexpr Array data2{ 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 };
      constexpr Array data3 = Swap(data1, data2);
      CHECK_ARRAY_EQUAL(data2.data(), data3.data(), data2.size());
#endif
    }
#endif
  };
}