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AccumulatedVolumeMaterialTests.cpp
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the newest version in sPHENIX GitHub for file AccumulatedVolumeMaterialTests.cpp
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// This file is part of the Acts project.
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//
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// Copyright (C) 2019 CERN for the benefit of the Acts project
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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#include <boost/test/unit_test.hpp>
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#include "
Acts/Material/AccumulatedVolumeMaterial.hpp
"
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#include "
Acts/Material/Material.hpp
"
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#include "
Acts/Tests/CommonHelpers/FloatComparisons.hpp
"
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namespace
Acts {
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namespace
Test {
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BOOST_AUTO_TEST_SUITE(accumulated_material)
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BOOST_AUTO_TEST_CASE
(vacuum) {
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AccumulatedVolumeMaterial
avm;
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// averaging over nothing is vacuum
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BOOST_TEST(avm.
average
() ==
Material
());
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// averaging over vacuum is still vacuum
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avm.
accumulate
(
MaterialProperties
(1));
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BOOST_TEST(avm.
average
() ==
Material
());
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}
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BOOST_AUTO_TEST_CASE
(single_material) {
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Material
mat
(1., 2., 3., 4., 5.);
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MaterialProperties
matprop(mat, 1);
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AccumulatedVolumeMaterial
avm;
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// mean of a single material should be the same material again for a thickness
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// of 1
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avm.
accumulate
(matprop);
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{
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auto
result = avm.
average
();
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CHECK_CLOSE_REL
(result.X0(), mat.
X0
(), 1
e
-4);
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CHECK_CLOSE_REL
(result.L0(), mat.
L0
(), 1
e
-4);
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CHECK_CLOSE_REL
(result.Ar(), mat.
Ar
(), 1
e
-4);
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CHECK_CLOSE_REL
(result.Z(), mat.
Z
(), 1
e
-4);
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CHECK_CLOSE_REL
(result.massDensity(), mat.
massDensity
(), 1
e
-4);
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}
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// adding a vacuum step changes the average
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avm.
accumulate
(
MaterialProperties
(1));
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{
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auto
result = avm.
average
();
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// less scattering in vacuum, larger radiation length
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CHECK_CLOSE_REL
(result.X0(), 2 * mat.
X0
(), 1
e
-4);
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CHECK_CLOSE_REL
(result.L0(), 2 * mat.
L0
(), 1
e
-4);
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// less material, lower density
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CHECK_CLOSE_REL
(result.Ar(), 0.5 * mat.
Ar
(), 1
e
-4);
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CHECK_CLOSE_REL
(result.Z(), 0.5 * mat.
Z
(), 1
e
-4);
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CHECK_CLOSE_REL
(result.massDensity(), 0.5 * mat.
massDensity
(), 1
e
-4);
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}
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}
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BOOST_AUTO_TEST_CASE
(two_materials) {
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Material
mat1(1., 2., 3., 4., 5.);
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Material
mat2(6., 7., 8., 9., 10.);
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MaterialProperties
matprop1(mat1, 1);
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MaterialProperties
matprop2(mat2, 1);
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AccumulatedVolumeMaterial
avm;
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avm.
accumulate
(matprop1);
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avm.
accumulate
(matprop2);
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auto
result = avm.
average
();
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CHECK_CLOSE_REL
(result.X0(), 2. / (1. / 1. + 1. / 6.), 1
e
-4);
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CHECK_CLOSE_REL
(result.L0(), 2. / (1. / 2. + 1. / 7.), 1
e
-4);
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CHECK_CLOSE_REL
(result.Ar(), 0.5 * (3. + 8.), 1
e
-4);
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CHECK_CLOSE_REL
(result.Z(), 0.5 * (4. + 9.), 1
e
-4);
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CHECK_CLOSE_REL
(result.massDensity(), 0.5 * (5. + 10.), 1
e
-4);
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}
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BOOST_AUTO_TEST_CASE
(two_materials_different_lengh) {
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Material
mat1(1., 2., 3., 4., 5.);
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Material
mat2(6., 7., 8., 9., 10.);
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MaterialProperties
matprop1(mat1, 0.5);
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MaterialProperties
matprop2(mat2, 2);
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AccumulatedVolumeMaterial
avm;
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avm.
accumulate
(matprop1);
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avm.
accumulate
(matprop2);
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auto
result = avm.
average
();
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CHECK_CLOSE_REL
(result.X0(), 2.5 / (0.5 / 1. + 2. / 6.), 1
e
-4);
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CHECK_CLOSE_REL
(result.L0(), 2.5 / (0.5 / 2. + 2. / 7.), 1
e
-4);
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CHECK_CLOSE_REL
(result.Ar(), 0.5 * (3. + 8.), 1
e
-4);
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CHECK_CLOSE_REL
(result.Z(), 0.5 * (4. + 9.), 1
e
-4);
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CHECK_CLOSE_REL
(result.massDensity(), 0.5 * (5. + 10.), 1
e
-4);
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}
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BOOST_AUTO_TEST_SUITE_END()
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}
// namespace Test
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}
// namespace Acts
acts
blob
master
Tests
UnitTests
Core
Material
AccumulatedVolumeMaterialTests.cpp
Built by
Jin Huang
. updated:
Wed Jun 29 2022 17:24:26
using
1.8.2 with
ECCE GitHub integration