#include "basicio.hpp"

#include <gtest/gtest.h>

using namespace Exiv2;

namespace

{

    const std::string testData(TESTDATA_PATH);

    const std::string imagePath(testData + "/DSC_3079.jpg");

}  // namespace

TEST(AFileIO, canBeInstantiatedWithFilePath)

{

    ASSERT_NO_THROW(FileIo file(imagePath));

}

TEST(AFileIO, canBeOpenInReadBinaryMode)

{

    FileIo file(imagePath);

    ASSERT_EQ(0, file.open());

}

TEST(AFileIO, isOpenDoItsJob)

{

    FileIo file(imagePath);

    ASSERT_FALSE(file.isopen());

    file.open();

    ASSERT_TRUE(file.isopen());

}

TEST(AFileIO, returnsFileSizeIfItsOpened)

{

    FileIo file(imagePath);

    file.open();

    ASSERT_EQ(118685ul, file.size());

}

TEST(AFileIO, returnsFileSizeEvenWhenFileItIsNotOpened)

{

    FileIo file(imagePath);

    ASSERT_EQ(118685ul, file.size());

}

TEST(AFileIO, isOpenedAtPosition0)

{

    FileIo file(imagePath);

    file.open();

    ASSERT_EQ(0, file.tell());

}

TEST(AFileIO, canSeekToExistingPositions)

{

    FileIo file(imagePath);

    file.open();

    ASSERT_EQ(0, file.seek(100, BasicIo::beg));

    ASSERT_EQ(0, file.seek(-50, BasicIo::cur));

    ASSERT_EQ(0, file.seek(-50, BasicIo::end));

    ASSERT_FALSE(file.error());

    ASSERT_FALSE(file.eof());

}

TEST(AFileIO, canSeekBeyondEOF)

{

    FileIo file(imagePath);

    file.open();

    // POSIX allows seeking beyond the existing end of file.

    ASSERT_EQ(0, file.seek(200000, BasicIo::beg));

    ASSERT_FALSE(file.error());

    ASSERT_FALSE(file.eof());

}