etl/test/test_random.cpp

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

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

Copyright(c) 2016 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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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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******************************************************************************/

#include "unit_test_framework.h"

#include <stdint.h>

#include "etl/crc32.h"
#include "etl/random.h"

#include <algorithm>
#include <fstream>
#include <vector>

namespace
{
  SUITE(test_random)
  {
    //*************************************************************************
    TEST(test_random_xorshift_range)
    {
      etl::random_xorshift r;

      uint32_t low  = 1234UL;
      uint32_t high = 9876UL;

      for (int i = 0; i < 100000; ++i)
      {
        uint32_t n = r.range(low, high);

        CHECK(n >= low);
        CHECK(n <= high);
      }
    }

    //*************************************************************************
    TEST(test_random_lcg_range)
    {
      etl::random_lcg r;

      uint32_t low  = 1234UL;
      uint32_t high = 9876UL;

      for (int i = 0; i < 100000; ++i)
      {
        uint32_t n = r.range(low, high);

        CHECK(n >= low);
        CHECK(n <= high);
      }
    }

    //*************************************************************************
    TEST(test_random_clcg_range)
    {
      etl::random_clcg r;

      uint32_t low  = 1234UL;
      uint32_t high = 9876UL;

      for (int i = 0; i < 100000; ++i)
      {
        uint32_t n = r.range(low, high);

        CHECK(n >= low);
        CHECK(n <= high);
      }
    }

    //*************************************************************************
    TEST(test_random_lsfr_range)
    {
      etl::random_lsfr r;

      uint32_t low  = 1234UL;
      uint32_t high = 9876UL;

      for (int i = 0; i < 100000; ++i)
      {
        uint32_t n = r.range(low, high);

        CHECK(n >= low);
        CHECK(n <= high);
      }
    }

    //*************************************************************************
    TEST(test_random_mwc_range)
    {
      etl::random_mwc r;

      uint32_t low  = 1234UL;
      uint32_t high = 9876UL;

      for (int i = 0; i < 100000; ++i)
      {
        uint32_t n = r.range(low, high);

        CHECK(n >= low);
        CHECK(n <= high);
      }
    }

    //*************************************************************************
    TEST(test_random_pcg_range)
    {
      etl::random_pcg r;

      uint32_t low  = 1234UL;
      uint32_t high = 9876UL;

      for (int i = 0; i < 100000; ++i)
      {
        uint32_t n = r.range(low, high);

        CHECK(n >= low);
        CHECK(n <= high);
      }
    }

    //*************************************************************************
    TEST(test_random_hash_range)
    {
      etl::random_hash<etl::crc32> r;

      uint32_t low  = 1234UL;
      uint32_t high = 9876UL;

      for (int i = 0; i < 100000; ++i)
      {
        uint32_t n = r.range(low, high);

        CHECK(n >= low);
        CHECK(n <= high);
      }
    }
  }
} // namespace