safe_numerics/test/test_compare.cpp

// Copyright (c) 2014 Robert Ramey
//
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)

#include <iostream>
#include <cassert>

#include "../include/safe_integer.hpp"
#include "../include/safe_compare.hpp"

// we could have used decltype and auto for C++11 but we've decided
// to use boost/typeof to be compatible with older compilers
#include <boost/typeof/typeof.hpp>

template<class T1, class T2>
bool test_compare_detail(
    T1 v1,
    T2 v2,
    char expected_result
){
    if('=' == expected_result){
        if(! boost::numeric::safe_compare::equal(v1, v2))
            return false;
        if(boost::numeric::safe_compare::less_than(v1, v2))
            return false;
        if(boost::numeric::safe_compare::greater_than(v1, v2))
            return false;
    }
    if('<' == expected_result){
        if(! boost::numeric::safe_compare::less_than(v1, v2))
            return false;
        if(boost::numeric::safe_compare::equal(v1, v2))
            return false;
        if(boost::numeric::safe_compare::greater_than(v1, v2))
            return false;
    }
    if('>' == expected_result){
        if(! boost::numeric::safe_compare::greater_than(v1, v2))
            return false;
        if(boost::numeric::safe_compare::less_than(v1, v2))
            return false;
        if(boost::numeric::safe_compare::equal(v1, v2))
            return false;
    }
    return true;
}

template<class T1, class T2>
bool test_compare(
    T1 v1,
    T2 v2,
    const char *av1,
    const char *av2,
    char expected_result
){
    std::cout
        << "testing  "
        << av1 << ' ' << expected_result << ' ' << av2
        << std::endl;

    if(! test_compare_detail(v1, v2,expected_result)){
        std::cout
            << "error "
            << av1 << ' ' << expected_result << ' ' << av2
            << std::endl;
        return false;
    }

    boost::numeric::safe<T1> t1 = v1;
    if(!test_compare_detail(t1, v2, expected_result)){
        std::cout
            << "error "
            << "safe(" << av1 << ')' << ' ' << expected_result << ' ' << av2
            << std::endl;
        return false;
    }

    return true; // correct result
}

#include "test.hpp"
#include "test_values.hpp"

const char *test_compare_result[VALUE_ARRAY_SIZE] = {
//      0       0       0       0
//      01234567012345670123456701234567
//      01234567890123456789012345678901
/* 0*/ "=<>>=<>>=<>>=<>>=<<<=<<<=<<<=<<<",
/* 1*/ ">=>>><>>><>>><>>>=<<><<<><<<><<<",
/* 2*/ "<<=<<<><<<><<<><<<<<<<<<<<<<<<<<",
/* 3*/ "<<>=<<>=<<>=<<>=<<<<<<<<<<<<<<<<",
/* 4*/ "=<>>=<>>=<>>=<>>=<<<=<<<=<<<=<<<",
/* 5*/ ">>>>>=>>><>>><>>>>>>>=<<><<<><<<",
/* 6*/ "<<<<<<=<<<><<<><<<<<<<<<<<<<<<<<",
/* 7*/ "<<>=<<>=<<>=<<>=<<<<<<<<<<<<<<<<",

/* 8*/ "=<>>=<>>=<>>=<>>=<<<=<<<=<<<=<<<",
/* 9*/ ">>>>>>>>>=>>><>>>>>>>>>>>=<<><<<",
/*10*/ "<<<<<<<<<<=<<<><<<<<<<<<<<<<<<<<",
/*11*/ "<<>=<<>=<<>=<<>=<<<<<<<<<<<<<<<<",
/*12*/ "=<>>=<>>=<>>=<>>=<<<=<<<=<<<=<<<",
/*13*/ ">>>>>>>>>>>>>=>>>>>>>>>>>>>>>=<<",
/*14*/ "<<<<<<<<<<<<<<=<<<<<<<<<<<<<<<<<",
/*15*/ "<<>=<<>=<<>=<<>=<<<<<<<<<<<<<<<<",

//      0       0       0       0
//      01234567012345670123456701234567
//      01234567890123456789012345678901
/*16*/ "=<>>=<>>=<>>=<>>=<<<=<<<=<<<=<<<",
/*17*/ ">=>>><>>><>>><>>>=<<><<<><<<><<<",
/*18*/ ">>>>><>>><>>><>>>>=<><<<><<<><<<",
/*19*/ ">>>>><>>><>>><>>>>>=><<<><<<><<<",
/*20*/ "=<>>=<>>=<>>=<>>=<<<=<<<=<<<=<<<",
/*21*/ ">>>>>=>>><>>><>>>>>>>=<<><<<><<<",
/*22*/ ">>>>>>>>><>>><>>>>>>>>=<><<<><<<",
/*23*/ ">>>>>>>>><>>><>>>>>>>>>=><<<><<<",

/*24*/ "=<>>=<>>=<>>=<>>=<<<=<<<=<<<=<<<",
/*25*/ ">>>>>>>>>=>>><>>>>>>>>>>>=<<><<<",
/*26*/ ">>>>>>>>>>>>><>>>>>>>>>>>>=<><<<",
/*27*/ ">>>>>>>>>>>>><>>>>>>>>>>>>>=><<<",
/*28*/ "=<>>=<>>=<>>=<>>=<<<=<<<=<<<=<<<",
/*29*/ ">>>>>>>>>>>>>=>>>>>>>>>>>>>>>=<<",
/*30*/ ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>=<",
/*31*/ ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>="
};

#define TEST_IMPL(v1, v2, result) \
    rval &= test_compare(         \
        v1,                       \
        v2,                       \
        BOOST_PP_STRINGIZE(v1),   \
        BOOST_PP_STRINGIZE(v2),   \
        result                    \
    );
/**/

#define TESTX(value_index1, value_index2)          \
    (std::cout << value_index1 << ',' << value_index2 << ','); \
    TEST_IMPL(                                     \
        BOOST_PP_ARRAY_ELEM(value_index1, VALUES), \
        BOOST_PP_ARRAY_ELEM(value_index2, VALUES), \
        test_compare_result[value_index1][value_index2] \
    )
/**/

#define COUNT sizeof(test_addition_result)
int main(int argc, char * argv[]){
    // sanity check on test matrix - should be symetrical
    for(int i = 0; i < VALUE_ARRAY_SIZE; ++i)
        for(int j = i + 1; j < VALUE_ARRAY_SIZE; ++j)
            ;//assert(test_compare_result[i][j] == test_compare_result[j][i]);

    bool rval = true;
    TEST_EACH_VALUE_PAIR
    return ! rval ;
}