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// ************************************************************************************************
//
// BornAgain: simulate and fit reflection and scattering
//
//! @file Tests/Functional/Mumufit/ScalarTestPlan.cpp
//! @brief Implements class ScalarTestPlan.
//!
//! @homepage http://www.bornagainproject.org
//! @license GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2018
//! @authors Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
// ************************************************************************************************
#include "Tests/Functional/Mumufit/ScalarTestPlan.h"
#include "Fit/Kernel/Minimizer.h"
#include <cmath>
#include <iostream>
#include <sstream>
#include <utility>
using namespace mumufit;
ScalarTestPlan::ScalarTestPlan(const std::string&, const scalar_function_t& func,
double expected_minimum, double tolerance)
: m_objective_function(func)
, m_expected_minimum(expected_minimum)
, m_tolerance_on_minimum(tolerance)
{
}
//! Returns true if found minimum of objective function coincide with expected.
bool ScalarTestPlan::minimumAsExpected(double found_minimum, double tolerance) const
{
bool success(true);
double diff = std::abs(found_minimum - m_expected_minimum);
if (diff > tolerance)
success = false;
std::ostringstream text;
text << "Found minimum:" << found_minimum << " Expected minimum:" << m_expected_minimum
<< " diff:" << diff << " " << (success ? "OK" : "FAILED");
std::cout << text.str() << std::endl;
return success;
}
bool ScalarTestPlan::checkMinimizer(Minimizer& minimizer) const
{
auto result = minimizer.minimize(scalarFunction(), parameters());
std::cout << result.toString() << std::endl;
bool success(true);
success &= valuesAsExpected(result.parameters().values());
success &= minimumAsExpected(result.minValue(), m_tolerance_on_minimum);
return success;
}
fcn_scalar_t ScalarTestPlan::scalarFunction() const
{
fcn_scalar_t func = [&](const Parameters& params) {
return m_objective_function(params.values());
};
return func;
}
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