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#include "catch/catch.hpp"
#include "creature.h"
#include "monster.h"
#include "mtype.h"
#include "test_statistics.h"
float expected_weights_base[][12] = { { 20, 0, 0, 0, 15, 15, 0, 0, 25, 25, 0, 0 },
{ 33.33, 2.33, 0.33, 0, 20, 20, 0, 0, 12, 12, 0, 0 },
{ 36.57, 5.71, .57, 0, 22.86, 22.86, 0, 0, 5.71, 5.71, 0, 0 }
};
float expected_weights_max[][12] = { { 2000, 0, 0, 0, 1191.49, 1191.49, 0, 0, 2228.12, 2228.12, 0, 0 },
{ 3333, 1167.77, 65.84, 0, 1588.66, 1588.66, 0, 0, 1069.50, 1069.50, 0, 0 },
{ 3657, 2861.78, 113.73, 0, 1815.83, 1815.83, 0, 0, 508.904, 508.904, 0, 0 }
};
void calculate_bodypart_distribution( const enum m_size asize, const enum m_size dsize,
const int hit_roll, float ( &expected )[12] )
{
INFO( "hit roll = " << hit_roll );
std::map<body_part, int> selected_part_histogram = {
{ bp_torso, 0 }, { bp_head, 0 }, { bp_eyes, 0 }, { bp_mouth, 0 }, { bp_arm_l, 0 }, { bp_arm_r, 0 },
{ bp_hand_l, 0 }, { bp_hand_r, 0 }, { bp_leg_l, 0 }, { bp_leg_r, 0 }, { bp_foot_l, 0 }, { bp_foot_r, 0 }
};
mtype atype;
atype.size = asize;
monster attacker;
attacker.type = &atype;
mtype dtype;
dtype.size = dsize;
monster defender;
defender.type = &dtype;
const int num_tests = 15000;
for( int i = 0; i < num_tests; ++i ) {
selected_part_histogram[defender.select_body_part( &attacker, hit_roll )]++;
}
float total_weight = 0.0;
for( float w : expected ) {
total_weight += w;
}
for( auto weight : selected_part_histogram ) {
INFO( body_part_name( weight.first ) );
const double expected_proportion = expected[weight.first] / total_weight;
CHECK_THAT( weight.second, IsBinomialObservation( num_tests, expected_proportion ) );
}
}
TEST_CASE( "Check distribution of attacks to body parts for same sized opponents." )
{
srand( 4242424242 );
calculate_bodypart_distribution( MS_SMALL, MS_SMALL, 0, expected_weights_base[1] );
calculate_bodypart_distribution( MS_SMALL, MS_SMALL, 1, expected_weights_base[1] );
calculate_bodypart_distribution( MS_SMALL, MS_SMALL, 100, expected_weights_max[1] );
}
TEST_CASE( "Check distribution of attacks to body parts for smaller attacker." )
{
srand( 4242424242 );
calculate_bodypart_distribution( MS_SMALL, MS_MEDIUM, 0, expected_weights_base[0] );
calculate_bodypart_distribution( MS_SMALL, MS_MEDIUM, 1, expected_weights_base[0] );
calculate_bodypart_distribution( MS_SMALL, MS_MEDIUM, 100, expected_weights_max[0] );
}
TEST_CASE( "Check distribution of attacks to body parts for larger attacker." )
{
srand( 4242424242 );
calculate_bodypart_distribution( MS_MEDIUM, MS_SMALL, 0, expected_weights_base[2] );
calculate_bodypart_distribution( MS_MEDIUM, MS_SMALL, 1, expected_weights_base[2] );
calculate_bodypart_distribution( MS_MEDIUM, MS_SMALL, 100, expected_weights_max[2] );
}
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