test_ransUtils.cxx

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// Copyright 2019-2023 CERN and copyright holders of ALICE O2.
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
//
// This software is distributed under the terms of the GNU General Public
// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
//
// In applying this license CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
 
 
#define BOOST_TEST_MODULE Utility test
#define BOOST_TEST_MAIN
#define BOOST_TEST_DYN_LINK
 
#undef NDEBUG
#include <cassert>
 
#include <vector>
#include <type_traits>
#include <array>
 
#include <boost/test/unit_test.hpp>
#include <boost/mpl/list.hpp>
 
#include <fairlogger/Logger.h>
 
#include "rANS/internal/common/utils.h"
 
BOOST_AUTO_TEST_CASE(test_checkBounds)
{
  std::vector<size_t> A(2);
  BOOST_CHECK_THROW(o2::rans::utils::checkBounds(std::end(A), std::begin(A)), o2::rans::OutOfBoundsError);
  BOOST_CHECK_NO_THROW(o2::rans::utils::checkBounds(std::begin(A), std::end(A)));
};
 
BOOST_AUTO_TEST_CASE(test_checkAlphabetBitRange)
{
  using namespace o2::rans::utils;
  BOOST_CHECK_EQUAL(getRangeBits(-1, -1), 0ul); // empty or single value -> 2**0 = 1
  BOOST_CHECK_EQUAL(getRangeBits(-1, 0), 1ul);  // 2 unique values -> 1 Bit
  BOOST_CHECK_EQUAL(getRangeBits(-1, 1), 2ul);  // 3 unique values -> 2 Bits
  BOOST_CHECK_EQUAL(getRangeBits(-1, 2), 2ul);  // 4 unique values -> 2 Bits
  BOOST_CHECK_EQUAL(getRangeBits(-1, 3), 3ul);  // 5 unique values -> 3 Bits
};