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KinematicCastsTests.cpp
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1 // This file is part of the Acts project.
2 //
3 // Copyright (C) 2018-2020 CERN for the benefit of the Acts project
4 //
5 // This Source Code Form is subject to the terms of the Mozilla Public
6 // License, v. 2.0. If a copy of the MPL was not distributed with this
7 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 
9 #include <boost/test/unit_test.hpp>
10 
11 #include <limits>
12 
13 #include "Acts/Tests/CommonHelpers/FloatComparisons.hpp"
14 #include "ActsFatras/Selectors/KinematicCasts.hpp"
15 #include "Dataset.hpp"
16 
17 using namespace Acts::UnitLiterals;
18 using namespace ActsFatras::Casts;
19 
20 namespace {
21 // TODO why does this have to be so high to avoid failure in eta tests?
22 constexpr auto eps = 128 * std::numeric_limits<double>::epsilon();
23 } // namespace
24 
25 BOOST_AUTO_TEST_SUITE(FatrasKinematicCasts)
26 
27 BOOST_AUTO_TEST_CASE(BackwardParticle) {
28  const auto& particle = Dataset::backwardPion;
29 
30  CHECK_SMALL(Vrho()(particle), eps);
31  CHECK_CLOSE_REL(Vz()(particle), -100_mm, eps);
32  CHECK_CLOSE_REL(AbsVz()(particle), 100_mm, eps);
33  CHECK_CLOSE_REL(Eta()(particle), -4.5, eps);
34  CHECK_CLOSE_REL(AbsEta()(particle), 4.5, eps);
35  CHECK_CLOSE_REL(Pt()(particle), 1.5_GeV / std::cosh(4.5), eps);
36  CHECK_CLOSE_REL(P()(particle), 1.5_GeV, eps);
37  // allow higher threshold to allow for potential mass term differences
38  CHECK_CLOSE_REL(E()(particle), std::hypot(1.5_GeV, 139.57018_MeV), 1e-7);
39 }
40 
41 BOOST_AUTO_TEST_CASE(CentralParticle) {
42  const auto& particle = Dataset::centralPion;
43 
44  CHECK_SMALL(Vrho()(particle), eps);
45  CHECK_SMALL(Vz()(particle), eps);
46  CHECK_SMALL(AbsVz()(particle), eps);
47  CHECK_SMALL(Eta()(particle), eps);
48  CHECK_SMALL(AbsEta()(particle), eps);
49  CHECK_CLOSE_REL(Pt()(particle), 1.5_GeV, eps);
50  CHECK_CLOSE_REL(P()(particle), 1.5_GeV, eps);
51  // allow higher threshold to allow for potential mass term differences
52  CHECK_CLOSE_REL(E()(particle), std::hypot(1.5_GeV, 139.57018_MeV), 1e-7);
53 }
54 
55 BOOST_AUTO_TEST_CASE(ForwardParticle) {
56  const auto& particle = Dataset::forwardPion;
57 
58  CHECK_SMALL(Vrho()(particle), eps);
59  CHECK_CLOSE_REL(Vz()(particle), 100_mm, eps);
60  CHECK_CLOSE_REL(AbsVz()(particle), 100_mm, eps);
61  CHECK_CLOSE_REL(Eta()(particle), 4.5, eps);
62  CHECK_CLOSE_REL(AbsEta()(particle), 4.5, eps);
63  CHECK_CLOSE_REL(Pt()(particle), 1.5_GeV / std::cosh(4.5), eps);
64  CHECK_CLOSE_REL(P()(particle), 1.5_GeV, eps);
65  // allow higher threshold to allow for potential mass term differences
66  CHECK_CLOSE_REL(E()(particle), std::hypot(1.5_GeV, 139.57018_MeV), 1e-7);
67 }
68 
69 BOOST_AUTO_TEST_SUITE_END()