/*
* Copyright 2009-2019 The VOTCA Development Team (http://www.votca.org)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
*
* 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.
*
*/
#define BOOST_TEST_MAIN
#define BOOST_TEST_MODULE trustregion_test
#include <boost/test/unit_test.hpp>
#include <iostream>
#include <votca/xtp/trustregion.h>
using namespace votca::xtp;
using namespace votca;
using namespace std;
BOOST_AUTO_TEST_SUITE(trustregion_test)
BOOST_AUTO_TEST_CASE(subproblem_test) {
Eigen::VectorXd gradient = Eigen::VectorXd::Zero(5);
gradient << 5.92833, 9.88054, 9.88054, 9.88054, 9.88054;
Eigen::MatrixXd hessian = Eigen::MatrixXd::Zero(5, 5);
hessian << 1.0835, 0.139166, 0.139166, 0.139166, 0.139166, 0.139166, 1.23194,
0.231943, 0.231943, 0.231943, 0.139166, 0.231943, 1.23194, 0.231943,
0.231943, 0.139166, 0.231943, 0.231943, 1.23194, 0.231943, 0.139166,
0.231943, 0.231943, 0.231943, 1.23194;
double radius = 0.1;
TrustRegion trf;
Eigen::VectorXd newstep = trf.CalculateStep(gradient, hessian, radius);
bool equal = std::abs(newstep.norm() - radius) < 1e-9;
if (!equal) {
std::cout << "newstep_norm:" << newstep.norm() << " trust_radius:" << radius
<< std::endl;
}
BOOST_CHECK_EQUAL(equal, 1);
}
BOOST_AUTO_TEST_SUITE_END()