libnbtplusplus/test/endian_str_test.h

/*
 * libnbt++ - A library for the Minecraft Named Binary Tag format.
 * Copyright (C) 2013, 2015  ljfa-ag
 *
 * This file is part of libnbt++.
 *
 * libnbt++ is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * libnbt++ is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with libnbt++.  If not, see <http://www.gnu.org/licenses/>.
 */
#include <cxxtest/TestSuite.h>
#include "endian_str.h"
#include <cstdlib>
#include <iostream>
#include <sstream>

using namespace endian;

class endian_str_test : public CxxTest::TestSuite
{
public:
    void test_uint()
    {
        std::stringstream str(std::ios::in | std::ios::out | std::ios::binary);

        write_little(str, uint8_t (0x01));
        write_little(str, uint16_t(0x0102));
        write       (str, uint32_t(0x01020304), little);
        write_little(str, uint64_t(0x0102030405060708));

        write_big   (str, uint8_t (0x09));
        write_big   (str, uint16_t(0x090A));
        write_big   (str, uint32_t(0x090A0B0C));
        write       (str, uint64_t(0x090A0B0C0D0E0F10), big);

        std::string expected{
            1,
            2, 1,
            4, 3, 2, 1,
            8, 7, 6, 5, 4, 3, 2, 1,

            9,
            9, 10,
            9, 10, 11, 12,
            9, 10, 11, 12, 13, 14, 15, 16
        };
        TS_ASSERT_EQUALS(str.str(), expected);

        uint8_t  u8;
        uint16_t u16;
        uint32_t u32;
        uint64_t u64;

        read_little(str, u8);
        TS_ASSERT_EQUALS(u8, 0x01);
        read_little(str, u16);
        TS_ASSERT_EQUALS(u16, 0x0102);
        read_little(str, u32);
        TS_ASSERT_EQUALS(u32, 0x01020304u);
        read(str, u64, little);
        TS_ASSERT_EQUALS(u64, 0x0102030405060708u);

        read_big(str, u8);
        TS_ASSERT_EQUALS(u8, 0x09);
        read_big(str, u16);
        TS_ASSERT_EQUALS(u16, 0x090A);
        read(str, u32, big);
        TS_ASSERT_EQUALS(u32, 0x090A0B0Cu);
        read_big(str, u64);
        TS_ASSERT_EQUALS(u64, 0x090A0B0C0D0E0F10u);

        TS_ASSERT(str); //Check if stream has failed
    }

    void test_sint()
    {
        std::stringstream str(std::ios::in | std::ios::out | std::ios::binary);

        write_little(str, int8_t (-0x01));
        write_little(str, int16_t(-0x0102));
        write_little(str, int32_t(-0x01020304));
        write       (str, int64_t(-0x0102030405060708), little);

        write_big   (str, int8_t (-0x09));
        write_big   (str, int16_t(-0x090A));
        write       (str, int32_t(-0x090A0B0C), big);
        write_big   (str, int64_t(-0x090A0B0C0D0E0F10));

        std::string expected{ //meh, stupid narrowing conversions
            '\xFF',
            '\xFE', '\xFE',
            '\xFC', '\xFC', '\xFD', '\xFE',
            '\xF8', '\xF8', '\xF9', '\xFA', '\xFB', '\xFC', '\xFD', '\xFE',

            '\xF7',
            '\xF6', '\xF6',
            '\xF6', '\xF5', '\xF4', '\xF4',
            '\xF6', '\xF5', '\xF4', '\xF3', '\xF2', '\xF1', '\xF0', '\xF0'
        };
        TS_ASSERT_EQUALS(str.str(), expected);

        int8_t  i8;
        int16_t i16;
        int32_t i32;
        int64_t i64;

        read_little(str, i8);
        TS_ASSERT_EQUALS(i8, -0x01);
        read_little(str, i16);
        TS_ASSERT_EQUALS(i16, -0x0102);
        read(str, i32, little);
        TS_ASSERT_EQUALS(i32, -0x01020304);
        read_little(str, i64);
        TS_ASSERT_EQUALS(i64, -0x0102030405060708);

        read_big(str, i8);
        TS_ASSERT_EQUALS(i8, -0x09);
        read_big(str, i16);
        TS_ASSERT_EQUALS(i16, -0x090A);
        read_big(str, i32);
        TS_ASSERT_EQUALS(i32, -0x090A0B0C);
        read(str, i64, big);
        TS_ASSERT_EQUALS(i64, -0x090A0B0C0D0E0F10);

        TS_ASSERT(str); //Check if stream has failed
    }

    void test_float()
    {
        std::stringstream str(std::ios::in | std::ios::out | std::ios::binary);

        //C99 has hexadecimal floating point literals, C++ doesn't...
        const float fconst = std::stof("-0xCDEF01p-63"); //-1.46325e-012
        const double dconst = std::stod("-0x1DEF0102030405p-375"); //-1.09484e-097
        //We will be assuming IEEE 754 here

        write_little(str, fconst);
        write_little(str, dconst);
        write_big   (str, fconst);
        write_big   (str, dconst);

        std::string expected{
            '\x01', '\xEF', '\xCD', '\xAB',
            '\x05', '\x04', '\x03', '\x02', '\x01', '\xEF', '\xCD', '\xAB',

            '\xAB', '\xCD', '\xEF', '\x01',
            '\xAB', '\xCD', '\xEF', '\x01', '\x02', '\x03', '\x04', '\x05'
        };
        TS_ASSERT_EQUALS(str.str(), expected);

        float f;
        double d;

        read_little(str, f);
        TS_ASSERT_EQUALS(f, fconst);
        read_little(str, d);
        TS_ASSERT_EQUALS(d, dconst);

        read_big(str, f);
        TS_ASSERT_EQUALS(f, fconst);
        read_big(str, d);
        TS_ASSERT_EQUALS(d, dconst);

        TS_ASSERT(str); //Check if stream has failed
    }
};