fsfw/contrib/fsfw_contrib/etl-20.39.4/test/test_murmur3.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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#include "unit_test_framework.h"

#include "murmurhash3.h" // The 'C' reference implementation.

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

#include "etl/murmur3.h"

namespace
{
  SUITE(test_murmur3)
  {
    //*************************************************************************
    TEST(test_murmur3_32_constructor)
    {
      typename std::aligned_storage<sizeof(char), std::alignment_of<uint32_t>::value>::type storage[10];
      std::string data("123456789");      

      char* begin = (char*)&storage[0];
      strcpy(begin, data.c_str());
      
      uint32_t hash = etl::murmur3<uint32_t>(begin, begin + data.size());

      uint32_t compare;
      MurmurHash3_x86_32(begin, data.size(), 0, &compare);

      CHECK_EQUAL(compare, hash);
    }

    //*************************************************************************
    TEST(test_murmur3_32_add_values)
    {
      typename std::aligned_storage<sizeof(char), std::alignment_of<uint32_t>::value>::type storage[10];
      std::string data("123456789");

      char* begin = (char*)&storage[0];
      strcpy(begin, data.c_str());

      etl::murmur3<uint32_t> murmur3_32_calculator;

      for (size_t i = 0UL; i < data.size(); ++i)
      {
        murmur3_32_calculator.add(data[i]);
      }

      uint32_t hash = murmur3_32_calculator;

      uint32_t compare;
      MurmurHash3_x86_32(begin, data.size(), 0, &compare);

      CHECK_EQUAL(compare, hash);
    }

    //*************************************************************************
    TEST(test_murmur3_32_add_range)
    {
      typename std::aligned_storage<sizeof(char), std::alignment_of<uint32_t>::value>::type storage[10];
      std::string data("123456789");

      char* begin = (char*)&storage[0];
      strcpy(begin, data.c_str());

      etl::murmur3<uint32_t> murmur3_32_calculator;

      murmur3_32_calculator.add(data.begin(), data.end());

      uint32_t hash = murmur3_32_calculator.value();

      uint32_t compare;
      MurmurHash3_x86_32(begin, data.size(), 0, &compare);

      CHECK_EQUAL(compare, hash);
    }

    //*************************************************************************
    TEST(test_murmur3_32_add_range_endian)
    {
      std::vector<uint8_t>  data1 = { 0x01U, 0x02U, 0x03U, 0x04U, 0x05U, 0x06U, 0x07U, 0x08U };
      std::vector<uint32_t> data2 = { 0x04030201UL, 0x08070605UL };

      uint32_t hash1 = etl::murmur3<uint32_t>(data1.begin(), data1.end());
      uint32_t hash2 = etl::murmur3<uint32_t>((uint8_t*)&data2[0], (uint8_t*)&data2[0] + (data2.size() * sizeof(uint32_t)));

      CHECK_EQUAL(hash1, hash2);

      uint32_t compare1;
      MurmurHash3_x86_32(&*data1.begin(), data1.size(), 0, &compare1);
      CHECK_EQUAL(compare1, hash1);

      uint32_t compare2;
      MurmurHash3_x86_32((uint8_t*)&data2[0], data2.size() * sizeof(uint32_t), 0, &compare2);
      CHECK_EQUAL(compare2, hash2);
    }
  };
}