#include "cr2header_int.hpp"

#include "gtestwrapper.h"

using namespace Exiv2;

static const byte cr2LittleEndian[] = {0x49, 0x49, 0x2a, 0x00, 0x10, 0x00, 0x00, 0x00,

                                       0x43, 0x52, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00};

TEST(ACr2Header, hasExpectedValuesAfterCreation)

{

    Internal::Cr2Header header;

    ASSERT_EQ(42, header.tag());

    ASSERT_EQ(16u, header.size());

    ASSERT_EQ(littleEndian, header.byteOrder());

}

TEST(ACr2Header, sizeIs16Bytes)

{

    Internal::Cr2Header header;

    DataBuf buffer = header.write();

    ASSERT_EQ(header.size(), buffer.size_);

    ASSERT_EQ(0, memcmp(cr2LittleEndian, buffer.pData_, 16));

}

TEST(ACr2Header, readDataFromBufferWithCorrectSize)

{

    Internal::Cr2Header header;

    ASSERT_TRUE(header.read(cr2LittleEndian, 16));

}

TEST(ACr2Header, failToReadDataFromBufferWithCorrectSizeButNull)

{

    Internal::Cr2Header header;

    ASSERT_FALSE(header.read(NULL, 16));

}

TEST(ACr2Header, failToReadDataFromBufferWithSizeDifferentThan16)

{

    Internal::Cr2Header header;

    ASSERT_FALSE(header.read(cr2LittleEndian, 15));

    ASSERT_FALSE(header.read(cr2LittleEndian, 0));

}

TEST(ACr2Header, failToReadDataFromBufferWithInvalidByteOrder)

{

    static const byte bufferInvalidByteOrder[] =  {0x88, 0x49, 0x2a, 0x00, 0x10, 0x00, 0x00, 0x00,

                                                   0x43, 0x52, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00};

    Internal::Cr2Header header;

    ASSERT_FALSE(header.read(bufferInvalidByteOrder, 16));

}

TEST(ACr2Header, failToReadDataFromBufferWithInvalidTag)

{

    static const byte bufferInvalidTag[] = {0x49, 0x49, 0x29, 0x00, 0x10, 0x00, 0x00, 0x00,

                                            0x43, 0x52, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00};

    Internal::Cr2Header header;

    ASSERT_FALSE(header.read(bufferInvalidTag, 16));

}