63 lines
1.9 KiB
C++
63 lines
1.9 KiB
C++
/*
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Copyright 2019 Equinor ASA.
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This file is part of the Open Porous Media project (OPM).
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OPM is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OPM is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with OPM. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#define NVERBOSE // to suppress our messages when throwing
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#define BOOST_TEST_MODULE RootFindersTest
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#include <boost/test/unit_test.hpp>
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#include <opm/common/utility/numeric/RootFinders.hpp>
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using namespace Opm;
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template<class Method>
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struct Test
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{
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template <class Functor>
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static int run(const Functor& f,
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const double a,
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const double b,
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const int max_iter,
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const double tolerance)
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{
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int iter = 0;
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Method::solve(f, a, b, max_iter, tolerance, iter);
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return iter;
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}
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};
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BOOST_AUTO_TEST_CASE(SimpleFunction)
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{
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auto f = [](double x) { return (x - 1.0)*x; };
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BOOST_CHECK_EQUAL(Test<RegulaFalsi<>>::run(f, -0.5, 0.99, 50, 1e-12), 10);
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BOOST_CHECK_EQUAL(Test<RegulaFalsiBisection<>>::run(f, -0.5, 0.99, 50, 1e-12), 15);
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}
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BOOST_AUTO_TEST_CASE(ToughFunction)
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{
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auto f = [](double x) { return x < 50.0 ? -0.0001 : x - 50.0001; };
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BOOST_CHECK_THROW(Test<RegulaFalsi<>>::run(f, 0.0, 100.0, 50, 1e-12), std::exception);
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BOOST_CHECK_EQUAL(Test<RegulaFalsi<>>::run(f, 0.0, 100.0, 1000000, 1e-12), 90);
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BOOST_CHECK_EQUAL(Test<RegulaFalsiBisection<>>::run(f, 0.0, 100.0, 1000000, 1e-12), 2);
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}
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