UtilitiesJsonConverterTests.cpp

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// This file is part of the Acts project.
//
// Copyright (C) 2021 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/Plugins/Json/UtilitiesJsonConverter.hpp"
#include "Acts/Tests/CommonHelpers/FloatComparisons.hpp"
#include "Acts/Utilities/BinUtility.hpp"
#include "Acts/Utilities/BinningType.hpp"
#include "Acts/Utilities/Range1D.hpp"

#include <cmath>
#include <fstream>
#include <initializer_list>
#include <string>
#include <utility>
#include <vector>

#include <nlohmann/json.hpp>

#include "EqualityHelpers.hpp"

using namespace Acts;

BOOST_AUTO_TEST_SUITE(UtilitiesJsonConverter)

BOOST_AUTO_TEST_CASE(BinUtilityRoundTripTests) {
  BinUtility reference(2, 0., 4., open, binR);

  std::ofstream out;

  // Test in one dimension
  nlohmann::json joneDimOut;
  to_json(joneDimOut, reference);
  out.open("BinUtility_1D.json");
  out << joneDimOut.dump(2);
  out.close();

  auto in = std::ifstream("BinUtility_1D.json",
                          std::ifstream::in | std::ifstream::binary);
  BOOST_CHECK(in.good());
  nlohmann::json joneDimIn;
  in >> joneDimIn;
  in.close();

  BinUtility test;
  from_json(joneDimIn, test);

  BOOST_CHECK(isEqual(reference, test, 0.0001));

  // Increase to two dimensions
  reference += BinUtility(10., -M_PI, M_PI, closed, binPhi);
  nlohmann::json jtwoDimOut;
  to_json(jtwoDimOut, reference);
  out.open("BinUtility_2D.json");
  out << jtwoDimOut.dump(2);
  out.close();

  in = std::ifstream("BinUtility_2D.json",
                     std::ifstream::in | std::ifstream::binary);
  BOOST_CHECK(in.good());
  nlohmann::json jtwoDimIn;
  in >> jtwoDimIn;
  in.close();

  test = BinUtility();
  from_json(jtwoDimIn, test);

  BOOST_CHECK(isEqual(reference, test, 0.0001));

  // Increase to three dimensions
  std::vector<float> boundaries = {-4., -1.5, 0., 10.};
  reference += BinUtility(boundaries, open, binZ);
  nlohmann::json jthreeDimOut;
  to_json(jthreeDimOut, reference);
  out.open("BinUtility_3D.json");
  out << jthreeDimOut.dump(2);
  out.close();

  in = std::ifstream("BinUtility_3D.json",
                     std::ifstream::in | std::ifstream::binary);
  BOOST_CHECK(in.good());
  nlohmann::json jthreeDimIn;
  in >> jthreeDimIn;
  in.close();

  test = BinUtility();
  from_json(jthreeDimIn, test);

  BOOST_CHECK(isEqual(reference, test, 0.0001));

  // One with transform
  Transform3 t;
  t = Eigen::AngleAxis(0.12334, Vector3(1., 2., 3).normalized());
  t.pretranslate(Vector3(1., 2., 3.));

  auto bData = reference.binningData()[0];

  reference = BinUtility(bData, t);

  nlohmann::json jtransformOut;
  to_json(jtransformOut, reference);
  out.open("BinUtility_Transform.json");
  out << jtransformOut.dump(2);
  out.close();

  in = std::ifstream("BinUtility_Transform.json",
                     std::ifstream::in | std::ifstream::binary);
  BOOST_CHECK(in.good());
  nlohmann::json jtransformIn;
  in >> jtransformIn;
  in.close();

  test = BinUtility();
  from_json(jtransformIn, test);

  BOOST_CHECK(isEqual(reference, test, 0.0001));
}

BOOST_AUTO_TEST_CASE(Range1DRoundTrip) {
  Range1D<ActsScalar> r(-10., 100.);

  nlohmann::json jrange;
  jrange["range"] = r;

  Range1D<ActsScalar> rIn = jrange["range"];

  CHECK_CLOSE_ABS(rIn.min(), -10., 10e-5);
  CHECK_CLOSE_ABS(rIn.max(), 100., 10e-5);
}

BOOST_AUTO_TEST_SUITE_END()