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PlanarModuleStepperTests.cpp
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1 // This file is part of the Acts project.
2 //
3 // Copyright (C) 2019 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/data/test_case.hpp>
10 #include <boost/test/unit_test.hpp>
11 
20 #include "Acts/Utilities/Units.hpp"
21 
22 namespace bdata = boost::unit_test::data;
23 namespace tt = boost::test_tools;
24 using namespace Acts::UnitLiterals;
25 
26 namespace Acts {
27 namespace Test {
28 
29 double halfX = 5_mm;
30 double halfY = 10_mm;
31 size_t ntests = 100;
32 size_t nbinsx = 100;
33 size_t nbinsy = 200;
34 double hThickness = 75_um;
35 double lAngle = 0.1;
36 double tanAlpha = tan(lAngle);
37 double sguardX = 2 * hThickness * abs(tanAlpha);
38 
39 // Module bounds
40 auto moduleBounds = std::make_shared<const RectangleBounds>(halfX, halfY);
42  std::make_shared<const CartesianSegmentation>(moduleBounds, nbinsx, nbinsy);
43 
44 // Create digitisation modules
45 // (1) positive readout
47 // (2) negative readout
49 std::vector<DigitizationModule> testModules = {std::move(pdModule),
50  std::move(ndModule)};
51 
54 
55 // Create a test context
57 
61  readout_counter_test,
62  bdata::random((bdata::seed = 0,
63  bdata::distribution = std::uniform_real_distribution<>(
64  -halfX + sguardX, halfX - sguardX))) ^
65  bdata::random((bdata::seed = 1,
66  bdata::distribution = std::uniform_real_distribution<>(
67  -halfX + sguardX, halfX - sguardX))) ^
68  bdata::random((bdata::seed = 2,
69  bdata::distribution =
70  std::uniform_real_distribution<>(-halfY, halfY))) ^
71  bdata::random((bdata::seed = 3,
72  bdata::distribution =
73  std::uniform_int_distribution<>(-halfY, halfY))) ^
74  bdata::xrange(ntests),
75  entryX, entryY, exitX, exitY, index) {
76  // avoid warning with void
77  (void)index;
78 
79  // Entry and exit point
80  Vector3D entry(entryX, entryY, -hThickness);
81  Vector3D exit(exitX, exitY, hThickness);
82 
83  // test the module flavours
84  for (auto& dm : testModules) {
85  // retrieve the digitiztion steps
86  auto cSteps = pmStepper.cellSteps(tgContext, dm, entry, exit);
87  BOOST_TEST(cSteps.size() != 0);
88 
89  // Test if the longitudinal distance between first and last step
90  // is equal/close to the thickness of the module
91  auto fPosition = cSteps.begin()->stepEntry;
92  auto lPosition = cSteps.rbegin()->stepExit;
93  double zDiff = (lPosition - fPosition).z();
94 
95  CHECK_CLOSE_REL(zDiff, 2 * hThickness, 10e-6);
96  }
97 }
98 
99 } // namespace Test
100 } // namespace Acts