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#include "UTMetadataDataExtensionMessage.h"

#include <iostream>

#include <cppunit/extensions/HelperMacros.h>

#include "BtConstants.h"
#include "PieceStorage.h"
#include "DownloadContext.h"
#include "DirectDiskAdaptor.h"
#include "ByteArrayDiskWriter.h"
#include "DownloadContext.h"
#include "MockPieceStorage.h"
#include "UTMetadataRequestTracker.h"
#include "bittorrent_helper.h"
#include "MessageDigest.h"
#include "message_digest_helper.h"

namespace aria2 {

class UTMetadataDataExtensionMessageTest:public CppUnit::TestFixture {

  CPPUNIT_TEST_SUITE(UTMetadataDataExtensionMessageTest);
  CPPUNIT_TEST(testGetExtensionMessageID);
  CPPUNIT_TEST(testGetBencodedData);
  CPPUNIT_TEST(testToString);
  CPPUNIT_TEST(testDoReceivedAction);
  CPPUNIT_TEST_SUITE_END();
public:
  void testGetExtensionMessageID();
  void testGetBencodedData();
  void testToString();
  void testDoReceivedAction();
};


CPPUNIT_TEST_SUITE_REGISTRATION(UTMetadataDataExtensionMessageTest);

void UTMetadataDataExtensionMessageTest::testGetExtensionMessageID()
{
  UTMetadataDataExtensionMessage msg(1);
  CPPUNIT_ASSERT_EQUAL((uint8_t)1, msg.getExtensionMessageID());
}

void UTMetadataDataExtensionMessageTest::testGetBencodedData()
{
  std::string data(METADATA_PIECE_SIZE, '0');

  UTMetadataDataExtensionMessage msg(1);
  msg.setIndex(1);
  msg.setTotalSize(data.size());
  msg.setData(data);
  CPPUNIT_ASSERT_EQUAL
    (std::string("d8:msg_typei1e5:piecei1e10:total_sizei16384ee")+data,
     msg.getPayload());
}

void UTMetadataDataExtensionMessageTest::testToString()
{
  UTMetadataDataExtensionMessage msg(1);
  msg.setIndex(100);
  CPPUNIT_ASSERT_EQUAL(std::string("ut_metadata data piece=100"),
                       msg.toString());
}

void UTMetadataDataExtensionMessageTest::testDoReceivedAction()
{
  SharedHandle<DirectDiskAdaptor> diskAdaptor(new DirectDiskAdaptor());
  SharedHandle<ByteArrayDiskWriter> diskWriter(new ByteArrayDiskWriter());
  diskAdaptor->setDiskWriter(diskWriter);
  SharedHandle<MockPieceStorage> pieceStorage(new MockPieceStorage());
  pieceStorage->setDiskAdaptor(diskAdaptor);
  SharedHandle<UTMetadataRequestTracker> tracker
    (new UTMetadataRequestTracker());
  SharedHandle<DownloadContext> dctx(new DownloadContext());
  SharedHandle<TorrentAttribute> attrs(new TorrentAttribute());

  std::string piece0 = std::string(METADATA_PIECE_SIZE, '0');
  std::string piece1 = std::string(METADATA_PIECE_SIZE, '1');
  std::string metadata = piece0+piece1;

  unsigned char infoHash[INFO_HASH_LENGTH];
  message_digest::digest(infoHash, INFO_HASH_LENGTH,
                         MessageDigest::sha1(),
                         metadata.data(), metadata.size());
  attrs->infoHash = std::string(&infoHash[0], &infoHash[20]);
  dctx->setAttribute(CTX_ATTR_BT, attrs);

  UTMetadataDataExtensionMessage m(1);
  m.setPieceStorage(pieceStorage);
  m.setUTMetadataRequestTracker(tracker.get());
  m.setDownloadContext(dctx);

  m.setIndex(1);
  m.setData(piece1);

  tracker->add(1);
  m.doReceivedAction();
  CPPUNIT_ASSERT(!tracker->tracks(1));

  pieceStorage->setDownloadFinished(true);
  // If piece is not tracked, it is ignored.
  m.setIndex(0);
  m.setData(piece0);
  m.doReceivedAction();

  tracker->add(0);
  m.doReceivedAction();

  CPPUNIT_ASSERT_EQUAL(metadata, diskWriter->getString());
}

} // namespace aria2