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#include <cmath>
#include <random>
#include "catch/catch.hpp"
#include "cata_utility.h"
TEST_CASE( "fast_floor", "[math]" )
{
REQUIRE( fast_floor( -2.0 ) == -2 );
REQUIRE( fast_floor( -1.9 ) == -2 );
REQUIRE( fast_floor( -1.1 ) == -2 );
REQUIRE( fast_floor( -1.0 ) == -1 );
REQUIRE( fast_floor( -0.9 ) == -1 );
REQUIRE( fast_floor( -0.1 ) == -1 );
REQUIRE( fast_floor( 0.0 ) == 0 );
REQUIRE( fast_floor( 0.1 ) == 0 );
REQUIRE( fast_floor( 0.9 ) == 0 );
REQUIRE( fast_floor( 1.0 ) == 1 );
REQUIRE( fast_floor( 1.1 ) == 1 );
REQUIRE( fast_floor( 1.9 ) == 1 );
REQUIRE( fast_floor( 2.0 ) == 2 );
REQUIRE( fast_floor( 2.1 ) == 2 );
REQUIRE( fast_floor( 2.9 ) == 2 );
std::random_device rd;
std::mt19937 mt( rd() );
std::uniform_real_distribution<double> dist( -10.0, 10.0 );
for( size_t i = 0; i != 1000; ++i ) {
double val = dist( mt );
REQUIRE( fast_floor( val ) == std::floor( val ) );
}
}
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