Geant4DetectorElementTests.cpp

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// This file is part of the Acts project.
//
// Copyright (C) 2022 CERN for the benefit of the Acts project
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

#include <boost/test/unit_test.hpp>

#include "Acts/Definitions/Algebra.hpp"
#include "Acts/Geometry/GeometryContext.hpp"
#include "Acts/Plugins/Geant4/Geant4DetectorElement.hpp"
#include "Acts/Surfaces/PlaneSurface.hpp"
#include "Acts/Surfaces/RectangleBounds.hpp"
#include "Acts/Surfaces/Surface.hpp"

#include <memory>
#include <utility>

class G4VPhysicalVolume {};

Acts::GeometryContext tContext;

BOOST_AUTO_TEST_SUITE(Geant4Plugin)

BOOST_AUTO_TEST_CASE(Geant4DetectorElement_construction) {
  // G4 phys volume
  auto g4physVol = std::make_shared<G4VPhysicalVolume>();

  // A surface
  auto rBounds = std::make_shared<Acts::RectangleBounds>(10., 10.);
  auto rTransform = Acts::Transform3::Identity();
  rTransform.pretranslate(Acts::Vector3(0., 0., 10));
  auto rSurface = Acts::Surface::makeShared<Acts::PlaneSurface>(
      rTransform, std::move(rBounds));
  // A detector element
  Acts::Geant4DetectorElement g4DetElement(rSurface, *g4physVol.get(),
                                           rTransform, 0.1);

  BOOST_CHECK(g4DetElement.thickness() == 0.1);
  BOOST_CHECK(&g4DetElement.surface() == rSurface.get());
  BOOST_CHECK(&g4DetElement.g4PhysicalVolume() == g4physVol.get());
  BOOST_CHECK(
      g4DetElement.transform(tContext).isApprox(rSurface->transform(tContext)));
}

BOOST_AUTO_TEST_SUITE_END()