// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "net/quic/reliable_quic_stream.h"

#include "net/quic/quic_ack_notifier.h"
#include "net/quic/quic_connection.h"
#include "net/quic/quic_spdy_compressor.h"
#include "net/quic/quic_spdy_decompressor.h"
#include "net/quic/quic_utils.h"
#include "net/quic/spdy_utils.h"
#include "net/quic/test_tools/quic_session_peer.h"
#include "net/quic/test_tools/quic_test_utils.h"
#include "testing/gmock/include/gmock/gmock.h"

using base::StringPiece;
using std::min;
using testing::_;
using testing::InSequence;
using testing::Return;
using testing::SaveArg;
using testing::StrEq;
using testing::StrictMock;

namespace net {
namespace test {
namespace {

const char kData1[] = "FooAndBar";
const char kData2[] = "EepAndBaz";
const size_t kDataLen = 9;
const QuicGuid kStreamId = 3;
const bool kIsServer = true;
const bool kShouldProcessData = true;

class TestStream : public ReliableQuicStream {
 public:
  TestStream(QuicStreamId id,
             QuicSession* session,
             bool should_process_data)
      : ReliableQuicStream(id, session),
        should_process_data_(should_process_data) {}

  virtual uint32 ProcessRawData(const char* data, uint32 data_len) OVERRIDE {
    EXPECT_NE(0u, data_len);
    DVLOG(1) << "ProcessData data_len: " << data_len;
    data_ += string(data, data_len);
    return should_process_data_ ? data_len : 0;
  }

  virtual QuicPriority EffectivePriority() const OVERRIDE {
    return QuicUtils::HighestPriority();
  }

  using ReliableQuicStream::WriteOrBufferData;
  using ReliableQuicStream::CloseReadSide;
  using ReliableQuicStream::CloseWriteSide;

  const string& data() const { return data_; }

 private:
  bool should_process_data_;
  string data_;
};

class ReliableQuicStreamTest : public ::testing::TestWithParam<bool> {
 public:
  ReliableQuicStreamTest() {
    headers_[":host"] = "www.google.com";
    headers_[":path"] = "/index.hml";
    headers_[":scheme"] = "https";
    headers_["cookie"] =
        "__utma=208381060.1228362404.1372200928.1372200928.1372200928.1; "
        "__utmc=160408618; "
        "GX=DQAAAOEAAACWJYdewdE9rIrW6qw3PtVi2-d729qaa-74KqOsM1NVQblK4VhX"
        "hoALMsy6HOdDad2Sz0flUByv7etmo3mLMidGrBoljqO9hSVA40SLqpG_iuKKSHX"
        "RW3Np4bq0F0SDGDNsW0DSmTS9ufMRrlpARJDS7qAI6M3bghqJp4eABKZiRqebHT"
        "pMU-RXvTI5D5oCF1vYxYofH_l1Kviuiy3oQ1kS1enqWgbhJ2t61_SNdv-1XJIS0"
        "O3YeHLmVCs62O6zp89QwakfAWK9d3IDQvVSJzCQsvxvNIvaZFa567MawWlXg0Rh"
        "1zFMi5vzcns38-8_Sns; "
        "GA=v*2%2Fmem*57968640*47239936%2Fmem*57968640*47114716%2Fno-nm-"
        "yj*15%2Fno-cc-yj*5%2Fpc-ch*133685%2Fpc-s-cr*133947%2Fpc-s-t*1339"
        "47%2Fno-nm-yj*4%2Fno-cc-yj*1%2Fceft-as*1%2Fceft-nqas*0%2Fad-ra-c"
        "v_p%2Fad-nr-cv_p-f*1%2Fad-v-cv_p*859%2Fad-ns-cv_p-f*1%2Ffn-v-ad%"
        "2Fpc-t*250%2Fpc-cm*461%2Fpc-s-cr*722%2Fpc-s-t*722%2Fau_p*4"
        "SICAID=AJKiYcHdKgxum7KMXG0ei2t1-W4OD1uW-ecNsCqC0wDuAXiDGIcT_HA2o1"
        "3Rs1UKCuBAF9g8rWNOFbxt8PSNSHFuIhOo2t6bJAVpCsMU5Laa6lewuTMYI8MzdQP"
        "ARHKyW-koxuhMZHUnGBJAM1gJODe0cATO_KGoX4pbbFxxJ5IicRxOrWK_5rU3cdy6"
        "edlR9FsEdH6iujMcHkbE5l18ehJDwTWmBKBzVD87naobhMMrF6VvnDGxQVGp9Ir_b"
        "Rgj3RWUoPumQVCxtSOBdX0GlJOEcDTNCzQIm9BSfetog_eP_TfYubKudt5eMsXmN6"
        "QnyXHeGeK2UINUzJ-D30AFcpqYgH9_1BvYSpi7fc7_ydBU8TaD8ZRxvtnzXqj0RfG"
        "tuHghmv3aD-uzSYJ75XDdzKdizZ86IG6Fbn1XFhYZM-fbHhm3mVEXnyRW4ZuNOLFk"
        "Fas6LMcVC6Q8QLlHYbXBpdNFuGbuZGUnav5C-2I_-46lL0NGg3GewxGKGHvHEfoyn"
        "EFFlEYHsBQ98rXImL8ySDycdLEFvBPdtctPmWCfTxwmoSMLHU2SCVDhbqMWU5b0yr"
        "JBCScs_ejbKaqBDoB7ZGxTvqlrB__2ZmnHHjCr8RgMRtKNtIeuZAo ";
  }

  void Initialize(bool stream_should_process_data) {
    connection_ = new StrictMock<MockConnection>(kIsServer);
    session_.reset(new StrictMock<MockSession>(connection_));
    stream_.reset(new TestStream(kStreamId, session_.get(),
                                 stream_should_process_data));
    stream2_.reset(new TestStream(kStreamId + 2, session_.get(),
                                 stream_should_process_data));
    compressor_.reset(new QuicSpdyCompressor());
    decompressor_.reset(new QuicSpdyDecompressor);
    write_blocked_list_ =
        QuicSessionPeer::GetWriteblockedStreams(session_.get());
  }

 protected:
  MockConnection* connection_;
  scoped_ptr<MockSession> session_;
  scoped_ptr<TestStream> stream_;
  scoped_ptr<TestStream> stream2_;
  scoped_ptr<QuicSpdyCompressor> compressor_;
  scoped_ptr<QuicSpdyDecompressor> decompressor_;
  SpdyHeaderBlock headers_;
  WriteBlockedList<QuicStreamId>* write_blocked_list_;
};

TEST_F(ReliableQuicStreamTest, WriteAllData) {
  Initialize(kShouldProcessData);

  connection_->options()->max_packet_length =
      1 + QuicPacketCreator::StreamFramePacketOverhead(
          connection_->version(), PACKET_8BYTE_GUID, !kIncludeVersion,
          PACKET_6BYTE_SEQUENCE_NUMBER, NOT_IN_FEC_GROUP);
  EXPECT_CALL(*session_, WritevData(kStreamId, _, 1, _, _, _)).WillOnce(
      Return(QuicConsumedData(kDataLen, true)));
  stream_->WriteOrBufferData(kData1, false);
  EXPECT_FALSE(write_blocked_list_->HasWriteBlockedStreams());
}

// TODO(rtenneti): Death tests crash on OS_ANDROID.
#if GTEST_HAS_DEATH_TEST && !defined(NDEBUG) && !defined(OS_ANDROID)
TEST_F(ReliableQuicStreamTest, NoBlockingIfNoDataOrFin) {
  Initialize(kShouldProcessData);

  // Write no data and no fin.  If we consume nothing we should not be write
  // blocked.
  EXPECT_DEBUG_DEATH({
    EXPECT_CALL(*session_, WritevData(kStreamId, _, 1, _, _, _)).WillOnce(
        Return(QuicConsumedData(0, false)));
    stream_->WriteOrBufferData(StringPiece(), false);
    EXPECT_FALSE(write_blocked_list_->HasWriteBlockedStreams());
  }, "");
}
#endif  // GTEST_HAS_DEATH_TEST && !defined(NDEBUG) && !defined(OS_ANDROID)

TEST_F(ReliableQuicStreamTest, BlockIfOnlySomeDataConsumed) {
  Initialize(kShouldProcessData);

  // Write some data and no fin.  If we consume some but not all of the data,
  // we should be write blocked a not all the data was consumed.
  EXPECT_CALL(*session_, WritevData(kStreamId, _, 1, _, _, _)).WillOnce(
      Return(QuicConsumedData(1, false)));
  stream_->WriteOrBufferData(StringPiece(kData1, 2), false);
  ASSERT_EQ(1u, write_blocked_list_->NumBlockedStreams());
}


TEST_F(ReliableQuicStreamTest, BlockIfFinNotConsumedWithData) {
  Initialize(kShouldProcessData);

  // Write some data and no fin.  If we consume all the data but not the fin,
  // we should be write blocked because the fin was not consumed.
  // (This should never actually happen as the fin should be sent out with the
  // last data)
  EXPECT_CALL(*session_, WritevData(kStreamId, _, 1, _, _, _)).WillOnce(
      Return(QuicConsumedData(2, false)));
  stream_->WriteOrBufferData(StringPiece(kData1, 2), true);
  ASSERT_EQ(1u, write_blocked_list_->NumBlockedStreams());
}

TEST_F(ReliableQuicStreamTest, BlockIfSoloFinNotConsumed) {
  Initialize(kShouldProcessData);

  // Write no data and a fin.  If we consume nothing we should be write blocked,
  // as the fin was not consumed.
  EXPECT_CALL(*session_, WritevData(kStreamId, _, 1, _, _, _)).WillOnce(
      Return(QuicConsumedData(0, false)));
  stream_->WriteOrBufferData(StringPiece(), true);
  ASSERT_EQ(1u, write_blocked_list_->NumBlockedStreams());
}

TEST_F(ReliableQuicStreamTest, WriteOrBufferData) {
  Initialize(kShouldProcessData);

  EXPECT_FALSE(write_blocked_list_->HasWriteBlockedStreams());
  connection_->options()->max_packet_length =
      1 + QuicPacketCreator::StreamFramePacketOverhead(
          connection_->version(), PACKET_8BYTE_GUID, !kIncludeVersion,
          PACKET_6BYTE_SEQUENCE_NUMBER, NOT_IN_FEC_GROUP);
  EXPECT_CALL(*session_, WritevData(_, _, 1, _, _, _)).WillOnce(
      Return(QuicConsumedData(kDataLen - 1, false)));
  stream_->WriteOrBufferData(kData1, false);
  EXPECT_TRUE(write_blocked_list_->HasWriteBlockedStreams());

  // Queue a bytes_consumed write.
  stream_->WriteOrBufferData(kData2, false);

  // Make sure we get the tail of the first write followed by the bytes_consumed
  InSequence s;
  EXPECT_CALL(*session_, WritevData(_, _, 1, _, _, _)).
      WillOnce(Return(QuicConsumedData(1, false)));
  EXPECT_CALL(*session_, WritevData(_, _, 1, _, _, _)).
      WillOnce(Return(QuicConsumedData(kDataLen - 2, false)));
  stream_->OnCanWrite();

  // And finally the end of the bytes_consumed.
  EXPECT_CALL(*session_, WritevData(_, _, 1, _, _, _)).
      WillOnce(Return(QuicConsumedData(2, true)));
  stream_->OnCanWrite();
}

TEST_F(ReliableQuicStreamTest, ConnectionCloseAfterStreamClose) {
  Initialize(kShouldProcessData);

  stream_->CloseReadSide();
  stream_->CloseWriteSide();
  EXPECT_EQ(QUIC_STREAM_NO_ERROR, stream_->stream_error());
  EXPECT_EQ(QUIC_NO_ERROR, stream_->connection_error());
  stream_->OnConnectionClosed(QUIC_INTERNAL_ERROR, false);
  EXPECT_EQ(QUIC_STREAM_NO_ERROR, stream_->stream_error());
  EXPECT_EQ(QUIC_NO_ERROR, stream_->connection_error());
}

}  // namespace
}  // namespace test
}  // namespace net