testTRDDiffusionCoefficient.cxx

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// Copyright 2019-2020 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 Test TRD DiffusionCoefficient
#define BOOST_TEST_MAIN
#define BOOST_TEST_DYN_LINK
#include <boost/test/unit_test.hpp>
#include "TRDSimulation/SimParam.h"
#include "TRDSimulation/DiffAndTimeStructEstimator.h"
 
#include "Field/MagneticField.h"
#include <TGeoGlobalMagField.h>
 
namespace o2
{
namespace trd
{
 
BOOST_AUTO_TEST_CASE(TRDDiffusionCoefficient_test1)
{
  auto fld = o2::field::MagneticField::createFieldMap();
  TGeoGlobalMagField::Instance()->SetField(fld);
  TGeoGlobalMagField::Instance()->Lock();
 
  SimParam param;
  param.cacheMagField();
  DiffusionAndTimeStructEstimator estimator(param.getGasMixture(), param.getCachedField());
  float dl = 0;
  float dt = 0;
  float vd = 1.48;
  estimator.getDiffCoeff(dl, dt, vd);
  // check whether the values match the expected AliRoot known output
  BOOST_CHECK_CLOSE(dl, 0.0255211, 0.1);
  BOOST_CHECK_CLOSE(dt, 0.0179734, 0.1);
}
 
} // namespace trd
} // namespace o2