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/*
[auto_generated]
libs/numeric/odeint/test/integrators_symplectic.cpp
[begin_description]
tba.
[end_description]
Copyright 2009-2013 Karsten Ahnert
Copyright 2009-2013 Mario Mulansky
Distributed under the Boost Software License, Version 1.0.
(See accompanying file LICENSE_1_0.txt or
copy at http://www.boost.org/LICENSE_1_0.txt)
*/
#include <boost/config.hpp>
#ifdef BOOST_MSVC
#pragma warning(disable:4996)
#endif
#define BOOST_TEST_MODULE odeint_iterators_symplectic
#define BOOST_FUSION_INVOKE_MAX_ARITY 15
#define BOOST_RESULT_OF_NUM_ARGS 15
#define FUSION_MAX_VECTOR_SIZE 15
#include <cmath>
#include <boost/test/unit_test.hpp>
#ifndef ODEINT_INTEGRATE_ITERATOR
#include <boost/numeric/odeint/integrate/integrate_const.hpp>
#else
#include <boost/numeric/odeint/iterator/integrate/integrate_const.hpp>
#endif
#include <boost/numeric/odeint/stepper/symplectic_euler.hpp>
#include <boost/numeric/odeint/stepper/symplectic_rkn_sb3a_mclachlan.hpp>
#include <boost/numeric/odeint/stepper/symplectic_rkn_sb3a_m4_mclachlan.hpp>
using namespace boost::unit_test;
using namespace boost::numeric::odeint;
namespace mpl = boost::mpl;
namespace fusion = boost::fusion;
typedef std::vector<double> container_type;
struct harm_osc {
void operator()( const container_type &q , container_type &dpdt )
{
dpdt[0] = -q[0];
}
};
class complete_steppers : public mpl::vector<
symplectic_euler< container_type >
, symplectic_rkn_sb3a_mclachlan< container_type >
, symplectic_rkn_sb3a_m4_mclachlan< container_type >
> {};
BOOST_AUTO_TEST_SUITE( symplectic_steppers_test )
BOOST_AUTO_TEST_CASE_TEMPLATE( test_integrate_const , Stepper , complete_steppers )
{
container_type q( 1 , 1.0 ) , p( 1 , 0.0 );
size_t steps = integrate_const( Stepper() , harm_osc() ,
std::make_pair( boost::ref(q) , boost::ref(p) ) ,
0.0 , 1.0 , 0.1 );
BOOST_CHECK( steps == 10 );
BOOST_CHECK_CLOSE( q[0] , std::cos(1.0) , 100*std::pow( 0.1 , Stepper::order_value ) );
}
BOOST_AUTO_TEST_SUITE_END()
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