fsfw/contrib/fsfw_contrib/etl-20.39.4/test/test_bsd_checksum.cpp

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

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

Copyright(c) 2014 John Wellbelove

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of this software and associated documentation files(the "Software"), to deal
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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******************************************************************************/

#include "unit_test_framework.h"

#include <iterator>
#include <string>
#include <vector>
#include <stdint.h>

#include "etl/checksum.h"

namespace
{
  template <typename TSum, typename TIterator>
  TSum reference_checksum(TIterator begin, TIterator end)
  {
    typedef typename std::iterator_traits<TIterator>::value_type value_type;
    TSum checksum = 0;

    while (begin != end)
    {
      value_type value = *begin++;

      for (size_t i = 0UL; i < sizeof(value_type); ++i)
      {
        uint8_t byte = (value >> (i * 8UL)) & 0xFFU;
        checksum = etl::rotate_right(checksum) + byte;
      }
    }

    return checksum;
  }

  SUITE(test_checksum)
  {
    //*************************************************************************
    TEST(test_checksum_constructor)
    {
      std::string data("123456789");

      uint8_t sum     = etl::bsd_checksum<uint8_t>(data.begin(), data.end());
      uint8_t compare = reference_checksum<uint8_t>(data.begin(), data.end());

      CHECK_EQUAL(int(compare), int(sum));
    }

    //*************************************************************************
    TEST(test_checksum_add_values8_add)
    {
      std::string data("123456789");

      etl::bsd_checksum<uint8_t> checksum_calculator;

      for (size_t i = 0UL; i < data.size(); ++i)
      {
        checksum_calculator.add(data[i]);
      }

      uint8_t sum     = checksum_calculator;
      uint8_t compare = reference_checksum<uint8_t>(data.begin(), data.end());

      CHECK_EQUAL(int(compare), int(sum));
    }

    //*************************************************************************
    TEST(test_checksum_add_values8_operator_plus_equals)
    {
      std::string data("123456789");

      etl::bsd_checksum<uint8_t> checksum_calculator;

      for (size_t i = 0UL; i < data.size(); ++i)
      {
        checksum_calculator.add(data[i]);
      }

      uint8_t sum     = checksum_calculator;
      uint8_t compare = reference_checksum<uint8_t>(data.begin(), data.end());

      CHECK_EQUAL(int(compare), int(sum));
    }

    //*************************************************************************
    TEST(test_checksum_add_range)
    {
      std::string data("123456789");

      etl::bsd_checksum<uint8_t> checksum_calculator;

      checksum_calculator.add(data.begin(), data.end());

      uint8_t sum     = checksum_calculator.value();
      uint8_t compare = reference_checksum<uint8_t>(data.begin(), data.end());

      CHECK_EQUAL(int(compare), int(sum));
    }

    //*************************************************************************
    TEST(test_checksum_add_range_via_iterator)
    {
      std::string data("123456789");

      etl::bsd_checksum<uint8_t> checksum_calculator;

      std::copy(data.begin(), data.end(), checksum_calculator.input());

      uint8_t sum = checksum_calculator.value();
      uint8_t compare = reference_checksum<uint8_t>(data.begin(), data.end());

      CHECK_EQUAL(int(compare), int(sum));
    }

    //*************************************************************************
    TEST(test_checksum_add_range_sum32)
    {
      std::string data("1");

      etl::bsd_checksum<uint32_t> checksum_calculator;

      checksum_calculator.add(data.begin(), data.end());

      uint32_t sum     = checksum_calculator.value();
      uint32_t compare = reference_checksum<uint32_t>(data.begin(), data.end());

      CHECK_EQUAL(compare, sum);
    }

    //*************************************************************************
    TEST(test_checksum_add_range_endian)
    {
      std::vector<uint8_t>  data1 = { 0x01U, 0x02U, 0x03U, 0x04U, 0x05U, 0x06U, 0x07U, 0x08U };
      std::vector<uint32_t> data2 = { 0x04030201UL, 0x08070605UL };
      std::vector<uint8_t>  data3 = { 0x08U, 0x07U, 0x06U, 0x05U, 0x04U, 0x03U, 0x02U, 0x01U };

      uint64_t hash1 = etl::bsd_checksum<uint8_t>(data1.begin(), data1.end());
      uint64_t hash2 = etl::bsd_checksum<uint8_t>((uint8_t*)&data2[0], (uint8_t*)&data2[0] + (data2.size() * sizeof(uint32_t)));
      uint64_t hash3 = etl::bsd_checksum<uint8_t>(data3.rbegin(), data3.rend());
      CHECK_EQUAL(hash1, hash2);
      CHECK_EQUAL(hash1, hash3);
    }
  };
}