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test_damping.cpp
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/*
* Copyright (C) 2020-2026 MEmilio
*
* Authors: Daniel Abele, Martin J. Kuehn
*
* Contact: Martin J. Kuehn <[email protected]>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "memilio/epidemiology/damping.h"
#include "matchers.h"
#include <gtest/gtest.h>
TEST(TestDampings, initZero)
{
mio::Dampings<double, mio::Damping<double, mio::RectMatrixShape<double>>> dampings(3, 2);
EXPECT_EQ(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(-1e5))),
print_wrap(Eigen::MatrixXd::Zero(3, 2)));
EXPECT_EQ(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(0))),
print_wrap(Eigen::MatrixXd::Zero(3, 2)));
EXPECT_EQ(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(1e-32))),
print_wrap(Eigen::MatrixXd::Zero(3, 2)));
EXPECT_EQ(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(1e5))),
print_wrap(Eigen::MatrixXd::Zero(3, 2)));
}
TEST(TestDampings, dampingsOnDifferentLevels)
{
mio::Dampings<double, mio::Damping<double, mio::RectMatrixShape<double>>> dampings(2, 2);
auto D1 = 0.25;
auto D2 = (Eigen::MatrixXd(2, 2) << 0.25, 0.5, 0.75, 1).finished();
dampings.add(D1, mio::DampingLevel(7), mio::DampingType(3), mio::SimulationTime<double>(0.5));
dampings.add(D2, mio::DampingLevel(13), mio::DampingType(3), mio::SimulationTime<double>(2.0));
EXPECT_EQ(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(-1e5))),
print_wrap(Eigen::MatrixXd::Zero(2, 2)));
EXPECT_EQ(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(-0.5))),
print_wrap(Eigen::MatrixXd::Zero(2, 2)));
EXPECT_THAT(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(0.5 + 1e-32))),
MatrixNear(Eigen::MatrixXd::Constant(2, 2, D1)));
EXPECT_THAT(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(1e5))),
MatrixNear((D1 + D2.array() - D1 * D2.array()).matrix()));
}
TEST(TestDampings, dampingsOnSameLevel)
{
mio::Dampings<double, mio::Damping<double, mio::SquareMatrixShape<double>>> dampings(2);
auto D1 = 0.25;
auto D2 = (Eigen::MatrixXd(2, 2) << 0.0, 0.25, 0.5, 0.75).finished();
dampings.add(D1, mio::DampingLevel(-2), mio::DampingType(0), mio::SimulationTime<double>(0.5));
dampings.add(D2, mio::DampingLevel(-2), mio::DampingType(1), mio::SimulationTime<double>(2.0));
EXPECT_EQ(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(-1e5))),
print_wrap(Eigen::MatrixXd::Zero(2, 2)));
EXPECT_EQ(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(-0.5))),
print_wrap(Eigen::MatrixXd::Zero(2, 2)));
EXPECT_THAT(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(0.5 + 1e-32))),
MatrixNear(Eigen::MatrixXd::Constant(2, 2, D1)));
EXPECT_THAT(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(1e5))),
MatrixNear((D1 + D2.array()).matrix()));
}
TEST(TestDampings, dampingsAtTheSameTime)
{
mio::Dampings<double, mio::Damping<double, mio::SquareMatrixShape<double>>> dampings(2);
auto D1 = 0.25;
auto D2 = (Eigen::MatrixXd(2, 2) << 0.0, 0.25, 0.5, 0.75).finished();
dampings.add(D1, mio::DampingLevel(-2), mio::DampingType(0), mio::SimulationTime<double>(0.5));
dampings.add(D2, mio::DampingLevel(-2), mio::DampingType(1), mio::SimulationTime<double>(0.5));
EXPECT_THAT(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(-0.5))),
MatrixNear(Eigen::MatrixXd::Zero(2, 2)));
EXPECT_THAT(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(0.5 + 1e-5))),
MatrixNear((D1 + D2.array()).matrix()));
}
TEST(TestDampings, dampingOfSameType)
{
mio::Dampings<double, mio::Damping<double, mio::SquareMatrixShape<double>>> dampings(2);
auto D1 = 0.25;
auto D2 = (Eigen::MatrixXd(2, 2) << 0.0, 0.25, 0.5, 0.75).finished();
dampings.add(D1, mio::DampingLevel(123), mio::DampingType(5), mio::SimulationTime<double>(0.5));
dampings.add(D2, mio::DampingLevel(123), mio::DampingType(5), mio::SimulationTime<double>(2.0));
EXPECT_EQ(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(-1e5))),
print_wrap(Eigen::MatrixXd::Zero(2, 2)));
EXPECT_EQ(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(-0.5))),
print_wrap(Eigen::MatrixXd::Zero(2, 2)));
EXPECT_THAT(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(0.5 + 1e-32))),
MatrixNear(Eigen::MatrixXd::Constant(2, 2, D1)));
EXPECT_THAT(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(1e5))), MatrixNear(D2));
}
TEST(TestDampings, dampingsNegative)
{
mio::Dampings<double, mio::Damping<double, mio::RectMatrixShape<double>>> dampings(2, 2);
auto D1 = -4.25;
auto D2 = (Eigen::MatrixXd(2, 2) << 0.25, -0.5, 0.75, -1).finished();
dampings.add(D1, mio::DampingLevel(7), mio::DampingType(3), mio::SimulationTime<double>(0.5));
dampings.add(D2, mio::DampingLevel(13), mio::DampingType(3), mio::SimulationTime<double>(2.0));
EXPECT_EQ(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(-1e5))),
print_wrap(Eigen::MatrixXd::Zero(2, 2)));
EXPECT_EQ(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(-0.5))),
print_wrap(Eigen::MatrixXd::Zero(2, 2)));
EXPECT_THAT(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(0.5 + 1e-32))),
MatrixNear(Eigen::MatrixXd::Constant(2, 2, D1)));
EXPECT_THAT(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(1e5))),
MatrixNear((D1 + D2.array() - D1 * D2.array()).matrix()));
}
TEST(TestDampings, dampingsCombined)
{
mio::Dampings<double, mio::Damping<double, mio::SquareMatrixShape<double>>> dampings(2);
auto D1 = 0.25;
auto D2 = (Eigen::MatrixXd(2, 2) << 0.1, 0.1, 0.1, 0.1).finished();
auto D3 = (Eigen::MatrixXd(2, 2) << 0.0, 0.25, 0.5, 0.75).finished();
auto D4 = 0.5;
//add dampings out of order to check sorting
dampings.add(D2, mio::DampingLevel(7), mio::DampingType(2), mio::SimulationTime<double>(0.0));
dampings.add(D1, mio::DampingLevel(123), mio::DampingType(5), mio::SimulationTime<double>(-2.0));
dampings.add(D4, mio::DampingLevel(123), mio::DampingType(5), mio::SimulationTime<double>(3.0));
dampings.add(D3, mio::DampingLevel(7), mio::DampingType(3), mio::SimulationTime<double>(1.5));
EXPECT_THAT(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(-1e5))),
print_wrap(Eigen::MatrixXd::Zero(2, 2)));
EXPECT_THAT(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(-1.0))),
MatrixNear(Eigen::MatrixXd::Constant(2, 2, D1)));
EXPECT_THAT(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(0.2))),
MatrixNear((D1 + D2.array() - D1 * D2.array()).matrix()));
EXPECT_THAT(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(2.0))),
MatrixNear((D1 + D2.array() + D3.array() - D1 * (D2 + D3).array()).matrix()));
EXPECT_THAT(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(1e45))),
MatrixNear((D4 + D2.array() + D3.array() - D4 * (D2 + D3).array()).matrix()));
}
TEST(TestDampings, smoothTransitions)
{
mio::Dampings<double, mio::Damping<double, mio::ColumnVectorShape<double>>> dampings(2);
auto D1 = 0.25;
auto D2 = (Eigen::VectorXd(2) << 0.1, 0.1).finished();
dampings.add(D1, mio::DampingLevel(123), mio::DampingType(5), mio::SimulationTime<double>(-2.0));
dampings.add(D2, mio::DampingLevel(1), mio::DampingType(10), mio::SimulationTime<double>(1.5));
EXPECT_THAT(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(-2.5))),
MatrixNear((dampings.get_matrix_at(mio::SimulationTime<double>(-3.)) +
dampings.get_matrix_at(mio::SimulationTime<double>(-2.))) /
2));
EXPECT_THAT(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(1.0))),
MatrixNear((dampings.get_matrix_at(mio::SimulationTime<double>(0.5)) +
dampings.get_matrix_at(mio::SimulationTime<double>(1.5))) /
2));
}
TEST(TestDampings, automatic_cache_update)
{
mio::Dampings<double, mio::Damping<double, mio::ColumnVectorShape<double>>> dampings(2);
auto D1 = 0.25;
dampings.set_automatic_cache_update(false);
dampings.add(D1, mio::DampingLevel(1), mio::DampingType(2), mio::SimulationTime<double>(1.0));
#ifndef NDEBUG
EXPECT_DEATH(dampings.get_matrix_at(mio::SimulationTime<double>(2.0)),
"Cache is not current\\. Did you disable the automatic cache update\\?");
#endif
dampings.set_automatic_cache_update(true);
EXPECT_THAT(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(2.0))),
MatrixNear((Eigen::VectorXd(2) << 0.25, 0.25).finished()));
}
TEST(TestDampings, clearDampings)
{
// After clear(), get_matrix_at() must return zero for all times,
// regardless of whether the cache was already built before the call
mio::Dampings<double, mio::Damping<double, mio::ColumnVectorShape<double>>> dampings(2);
dampings.add(0.9, mio::DampingLevel(0), mio::DampingType(0), mio::SimulationTime<double>(5.0));
dampings.clear();
// All times should be without damping
EXPECT_EQ(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(-1e5))),
print_wrap(Eigen::VectorXd::Zero(2)));
EXPECT_EQ(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(0.0))),
print_wrap(Eigen::VectorXd::Zero(2)));
EXPECT_EQ(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(10.0))),
print_wrap(Eigen::VectorXd::Zero(2)));
}
TEST(TestDampings, clearThenAdd)
{
// Dampings added after clear() should be applied correctly
mio::Dampings<double, mio::Damping<double, mio::ColumnVectorShape<double>>> dampings(2);
dampings.add(0.9, mio::DampingLevel(0), mio::DampingType(0), mio::SimulationTime<double>(0.0));
dampings.clear();
dampings.add(0.5, mio::DampingLevel(0), mio::DampingType(0), mio::SimulationTime<double>(0.0));
EXPECT_THAT(print_wrap(dampings.get_matrix_at(mio::SimulationTime<double>(1.0))),
MatrixNear((Eigen::VectorXd(2) << 0.5, 0.5).finished()));
}