exiv2/unitTests/test_types.cpp

// ***************************************************************** -*- C++ -*-
/*
 * Copyright (C) 2004-2021 Exiv2 authors
 * This program is part of the Exiv2 distribution.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, 5th Floor, Boston, MA 02110-1301 USA.
 */

#include <exiv2/types.hpp>
#include <cmath>
#include <limits>
#include <gtest/gtest.h>
using namespace Exiv2;

// More info about tm : http://www.cplusplus.com/reference/ctime/tm/

TEST(ExivTime, getsTimeFromValidString)
{
    struct tm tmInstance;
    ASSERT_EQ(0, exifTime("2007:05:24 12:31:55", &tmInstance));
    ASSERT_EQ(107,  tmInstance.tm_year); // Years since 1900
    ASSERT_EQ(4,    tmInstance.tm_mon);
    ASSERT_EQ(24,   tmInstance.tm_mday);
    ASSERT_EQ(12,   tmInstance.tm_hour);
    ASSERT_EQ(31,   tmInstance.tm_min);
    ASSERT_EQ(55,   tmInstance.tm_sec);
}

TEST(ExivTime, doesNotGetTimeWithBadFormedString)
{
    struct tm tmInstance;
    ASSERT_EQ(1, exifTime("007:a5:24 aa:bb:cc", &tmInstance));
}

TEST(DataBuf, pointsToNullByDefault)
{
    DataBuf instance;
    ASSERT_EQ(nullptr, instance.c_data(0));
    ASSERT_EQ(0,    instance.size());
}

TEST(DataBuf, allocatesDataWithNonEmptyConstructor)
{
    DataBuf instance (5);
    ASSERT_NE(static_cast<byte *>(nullptr), instance.c_data(0));  /// \todo use nullptr once we move to c++11
    ASSERT_EQ(5,    instance.size());
}

TEST(Rational, floatToRationalCast)
{
    static const float floats[] = {0.5F, 0.015F, 0.0000625F};

    for (size_t i = 0; i < sizeof(floats) / sizeof(*floats); ++i) {
        const Rational r = floatToRationalCast(floats[i]);
        const float fraction = static_cast<float>(r.first) / static_cast<float>(r.second);
        ASSERT_TRUE(std::fabs((floats[i] - fraction) / floats[i]) < 0.01F);
    }

    const Rational plus_inf = floatToRationalCast(std::numeric_limits<float>::infinity());
    ASSERT_EQ(plus_inf.first, 1);
    ASSERT_EQ(plus_inf.second, 0);

    const Rational minus_inf = floatToRationalCast(-1 * std::numeric_limits<float>::infinity());
    ASSERT_EQ(minus_inf.first, -1);
    ASSERT_EQ(minus_inf.second, 0);
}