Core/MagneticField/MagneticFieldProviderTests.cpp

0001 // This file is part of the ACTS project.
0002 //
0003 // Copyright (C) 2016 CERN for the benefit of the ACTS project
0004 //
0005 // This Source Code Form is subject to the terms of the Mozilla Public
0006 // License, v. 2.0. If a copy of the MPL was not distributed with this
0007 // file, You can obtain one at https://mozilla.org/MPL/2.0/.
0008
0009 #include <boost/test/unit_test.hpp>
0010
0011 #include "Acts/MagneticField/MagneticFieldContext.hpp"
0012 #include "Acts/MagneticField/MagneticFieldProvider.hpp"
0013
0014 namespace Acts::Test {
0015
0016 // Create a test context
0017 MagneticFieldContext mfContext = MagneticFieldContext();
0018
0019 BOOST_AUTO_TEST_CASE(TypeErasedCacheType) {
0020   bool constructor_called = false;
0021   bool destructor_called = false;
0022
0023   struct MyCache {
0024     MyCache(int value, bool* ctor, bool* dtor) : m_value{value}, m_dtor{dtor} {
0025       (*ctor) = true;
0026     }
0027     ~MyCache() { (*m_dtor) = true; }
0028     int m_value;
0029     bool* m_dtor;
0030   };
0031
0032   BOOST_CHECK(!constructor_called);
0033   BOOST_CHECK(!destructor_called);
0034
0035   {
0036     MagneticFieldProvider::Cache cache{
0037         MagneticFieldProvider::Cache(std::in_place_type<MyCache>, 42,
0038                                      &constructor_called, &destructor_called)};
0039     BOOST_CHECK(constructor_called);
0040     BOOST_CHECK(!destructor_called);
0041
0042     MyCache& v = cache.as<MyCache>();
0043     BOOST_CHECK_EQUAL(v.m_value, 42);
0044     v.m_value = 65;
0045
0046     MyCache& v2 = cache.as<MyCache>();
0047     BOOST_CHECK_EQUAL(v2.m_value, 65);
0048   }
0049
0050   BOOST_CHECK(constructor_called);
0051   BOOST_CHECK(destructor_called);
0052 }
0053
0054 }  // namespace Acts::Test