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test_descriptions.cc
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test_descriptions.cc
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/**
* \authors The HEJ collaboration (see AUTHORS for details)
* \date 2019-2020
* \copyright GPLv2 or later
*/
#include "hej_test.hh"
#include <cstdlib>
#include <iostream>
#include <utility>
#include "HEJ/Event.hh"
#include "HEJ/Parameters.hh"
#include "HEJ/PDG_codes.hh"
#include "HEJ/ScaleFunction.hh"
#include "fastjet/JetDefinition.hh"
#include "fastjet/PseudoJet.hh"
int main() {
constexpr double mu = 125.;
HEJ::ScaleFunction fun{"125", HEJ::FixedScale{mu}};
ASSERT(fun.name() == "125");
HEJ::ScaleGenerator scale_gen{
{std::move(fun)}, {0.5, 1, 2.}, 2.1
};
HEJ::Event::EventData tmp;
tmp.outgoing.push_back(
{HEJ::ParticleID::gluon, fastjet::PtYPhiM(50., -1., 0.3, 0.), {}}
);
tmp.outgoing.push_back(
{HEJ::ParticleID::gluon, fastjet::PtYPhiM(30., 1., -0.3, 0.), {}}
);
HEJ::Event ev{
tmp.cluster(
fastjet::JetDefinition{fastjet::kt_algorithm, 0.4}, 20.
)
};
auto rescaled = scale_gen(std::move(ev));
ASSERT(rescaled.central().description->scale_name == "125");
for(auto const & var: rescaled.variations()) {
ASSERT(var.description->scale_name == "125");
}
ASSERT(rescaled.central().description->mur_factor == 1.);
ASSERT(rescaled.central().description->muf_factor == 1.);
ASSERT(rescaled.variations(0).description->mur_factor == 1.);
ASSERT(rescaled.variations(0).description->muf_factor == 1.);
ASSERT(rescaled.variations(1).description->mur_factor == 0.5);
ASSERT(rescaled.variations(1).description->muf_factor == 0.5);
ASSERT(rescaled.variations(2).description->mur_factor == 0.5);
ASSERT(rescaled.variations(2).description->muf_factor == 1.);
ASSERT(rescaled.variations(3).description->mur_factor == 1.);
ASSERT(rescaled.variations(3).description->muf_factor == 0.5);
ASSERT(rescaled.variations(4).description->mur_factor == 1.);
ASSERT(rescaled.variations(4).description->muf_factor == 2.);
ASSERT(rescaled.variations(5).description->mur_factor == 2.);
ASSERT(rescaled.variations(5).description->muf_factor == 1.);
ASSERT(rescaled.variations(6).description->mur_factor == 2.);
ASSERT(rescaled.variations(6).description->muf_factor == 2.);
return EXIT_SUCCESS;
}

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