#include "openmc/tallies/filter_energy.h"

#include "openmc/tallies/tally.h"

#include <catch2/catch_test_macros.hpp>

using namespace openmc;

TEST_CASE("Test add/set_filter")

{

// create a new tally object

Tally* tally = Tally::create();

// create a new particle filter

Filter* particle_filter = Filter::create("particle");

// add the particle filter to the tally

tally->add_filter(particle_filter);

// the filter should be added to the tally

REQUIRE(tally->filters().size() == 1);

REQUIRE(model::filter_map[particle_filter->id()] == tally->filters(0));

// add the particle filter to the tally again

tally->add_filter(particle_filter);

// the tally should have the same number of filters

REQUIRE(tally->filters().size() == 1);

// create a cell filter

Filter* cell_filter = Filter::create("cell");

tally->add_filter(cell_filter);

// now the size of the filters should have increased

REQUIRE(tally->filters().size() == 2);

REQUIRE(model::filter_map[cell_filter->id()] == tally->filters(1));

// if we set the filters explicitly there shouldn't be extra filters hanging

// around

tally->set_filters({&cell_filter, 1});

REQUIRE(tally->filters().size() == 1);

REQUIRE(model::filter_map[cell_filter->id()] == tally->filters(0));

// set filters again using both filters

std::vector<Filter*> filters = {cell_filter, particle_filter};

tally->set_filters(filters);

REQUIRE(tally->filters().size() == 2);

REQUIRE(model::filter_map[cell_filter->id()] == tally->filters(0));

REQUIRE(model::filter_map[particle_filter->id()] == tally->filters(1));

// set filters with a duplicate filter, should only add the filter to the

// tally once

filters = {cell_filter, cell_filter};

tally->set_filters(filters);

REQUIRE(tally->filters().size() == 1);

REQUIRE(model::filter_map[cell_filter->id()] == tally->filters(0));

}

// Regression test for 64-bit tally filter-bin counts (mesh x groups > 2^31).

TEST_CASE("Tally filter-bin count does not overflow 32 bits")

{

// Two energy filters whose bin counts multiply to 2.5e9, above INT32_MAX.

constexpr int64_t bins_per_filter = 50000;

// Only the bin count matters here, so the edge values are an arbitrary ramp.

std::vector<double> edges(bins_per_filter + 1);

for (int64_t i = 0; i < bins_per_filter + 1; ++i)

edges[i] = static_cast<double>(i);

Tally* tally = Tally::create();

for (int i = 0; i < 2; ++i) {

Filter* filter = Filter::create("energy");

dynamic_cast<EnergyFilter*>(filter)->set_bins(edges);

tally->add_filter(filter);

}

tally->set_strides();

// set_strides() previously accumulated this product in a 32-bit int.

REQUIRE(tally->n_filter_bins() == bins_per_filter * bins_per_filter);

REQUIRE(tally->n_filter_bins() > 2147483647);

}