net/quic/quic_data_stream_test.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "net/quic/quic_data_stream.h"
   6
   7 #include "net/quic/quic_ack_notifier.h"
   8 #include "net/quic/quic_connection.h"
   9 #include "net/quic/quic_flags.h"
  10 #include "net/quic/quic_utils.h"
  11 #include "net/quic/quic_write_blocked_list.h"
  12 #include "net/quic/spdy_utils.h"
  13 #include "net/quic/test_tools/quic_flow_controller_peer.h"
  14 #include "net/quic/test_tools/quic_session_peer.h"
  15 #include "net/quic/test_tools/quic_test_utils.h"
  16 #include "net/quic/test_tools/reliable_quic_stream_peer.h"
  17 #include "net/test/gtest_util.h"
  18 #include "testing/gmock/include/gmock/gmock.h"
  19
  20 using base::StringPiece;
  21 using std::min;
  22 using testing::AnyNumber;
  23 using testing::InSequence;
  24 using testing::Return;
  25 using testing::SaveArg;
  26 using testing::StrictMock;
  27 using testing::_;
  28
  29 namespace net {
  30 namespace test {
  31 namespace {
  32
  33 const bool kIsServer = true;
  34 const bool kShouldProcessData = true;
  35
  36 class TestStream : public QuicDataStream {
  37  public:
  38   TestStream(QuicStreamId id,
  39              QuicSession* session,
  40              bool should_process_data)
  41       : QuicDataStream(id, session),
  42         should_process_data_(should_process_data) {}
  43
  44   virtual uint32 ProcessData(const char* data, uint32 data_len) OVERRIDE {
  45     EXPECT_NE(0u, data_len);
  46     DVLOG(1) << "ProcessData data_len: " << data_len;
  47     data_ += string(data, data_len);
  48     return should_process_data_ ? data_len : 0;
  49   }
  50
  51   using ReliableQuicStream::WriteOrBufferData;
  52   using ReliableQuicStream::CloseReadSide;
  53   using ReliableQuicStream::CloseWriteSide;
  54
  55   const string& data() const { return data_; }
  56
  57  private:
  58   bool should_process_data_;
  59   string data_;
  60 };
  61
  62 class QuicDataStreamTest : public ::testing::TestWithParam<QuicVersion> {
  63  public:
  64   QuicDataStreamTest() {
  65     headers_[":host"] = "www.google.com";
  66     headers_[":path"] = "/index.hml";
  67     headers_[":scheme"] = "https";
  68     headers_["cookie"] =
  69         "__utma=208381060.1228362404.1372200928.1372200928.1372200928.1; "
  70         "__utmc=160408618; "
  71         "GX=DQAAAOEAAACWJYdewdE9rIrW6qw3PtVi2-d729qaa-74KqOsM1NVQblK4VhX"
  72         "hoALMsy6HOdDad2Sz0flUByv7etmo3mLMidGrBoljqO9hSVA40SLqpG_iuKKSHX"
  73         "RW3Np4bq0F0SDGDNsW0DSmTS9ufMRrlpARJDS7qAI6M3bghqJp4eABKZiRqebHT"
  74         "pMU-RXvTI5D5oCF1vYxYofH_l1Kviuiy3oQ1kS1enqWgbhJ2t61_SNdv-1XJIS0"
  75         "O3YeHLmVCs62O6zp89QwakfAWK9d3IDQvVSJzCQsvxvNIvaZFa567MawWlXg0Rh"
  76         "1zFMi5vzcns38-8_Sns; "
  77         "GA=v*2%2Fmem*57968640*47239936%2Fmem*57968640*47114716%2Fno-nm-"
  78         "yj*15%2Fno-cc-yj*5%2Fpc-ch*133685%2Fpc-s-cr*133947%2Fpc-s-t*1339"
  79         "47%2Fno-nm-yj*4%2Fno-cc-yj*1%2Fceft-as*1%2Fceft-nqas*0%2Fad-ra-c"
  80         "v_p%2Fad-nr-cv_p-f*1%2Fad-v-cv_p*859%2Fad-ns-cv_p-f*1%2Ffn-v-ad%"
  81         "2Fpc-t*250%2Fpc-cm*461%2Fpc-s-cr*722%2Fpc-s-t*722%2Fau_p*4"
  82         "SICAID=AJKiYcHdKgxum7KMXG0ei2t1-W4OD1uW-ecNsCqC0wDuAXiDGIcT_HA2o1"
  83         "3Rs1UKCuBAF9g8rWNOFbxt8PSNSHFuIhOo2t6bJAVpCsMU5Laa6lewuTMYI8MzdQP"
  84         "ARHKyW-koxuhMZHUnGBJAM1gJODe0cATO_KGoX4pbbFxxJ5IicRxOrWK_5rU3cdy6"
  85         "edlR9FsEdH6iujMcHkbE5l18ehJDwTWmBKBzVD87naobhMMrF6VvnDGxQVGp9Ir_b"
  86         "Rgj3RWUoPumQVCxtSOBdX0GlJOEcDTNCzQIm9BSfetog_eP_TfYubKudt5eMsXmN6"
  87         "QnyXHeGeK2UINUzJ-D30AFcpqYgH9_1BvYSpi7fc7_ydBU8TaD8ZRxvtnzXqj0RfG"
  88         "tuHghmv3aD-uzSYJ75XDdzKdizZ86IG6Fbn1XFhYZM-fbHhm3mVEXnyRW4ZuNOLFk"
  89         "Fas6LMcVC6Q8QLlHYbXBpdNFuGbuZGUnav5C-2I_-46lL0NGg3GewxGKGHvHEfoyn"
  90         "EFFlEYHsBQ98rXImL8ySDycdLEFvBPdtctPmWCfTxwmoSMLHU2SCVDhbqMWU5b0yr"
  91         "JBCScs_ejbKaqBDoB7ZGxTvqlrB__2ZmnHHjCr8RgMRtKNtIeuZAo ";
  92   }
  93
  94   void Initialize(bool stream_should_process_data) {
  95     connection_ = new testing::StrictMock<MockConnection>(
  96         kIsServer, SupportedVersions(GetParam()));
  97     session_.reset(new testing::StrictMock<MockSession>(connection_));
  98     stream_.reset(new TestStream(kClientDataStreamId1, session_.get(),
  99                                  stream_should_process_data));
 100     stream2_.reset(new TestStream(kClientDataStreamId2, session_.get(),
 101                                   stream_should_process_data));
 102     write_blocked_list_ =
 103         QuicSessionPeer::GetWriteBlockedStreams(session_.get());
 104   }
 105
 106  protected:
 107   MockConnection* connection_;
 108   scoped_ptr<MockSession> session_;
 109   scoped_ptr<TestStream> stream_;
 110   scoped_ptr<TestStream> stream2_;
 111   SpdyHeaderBlock headers_;
 112   QuicWriteBlockedList* write_blocked_list_;
 113 };
 114
 115 INSTANTIATE_TEST_CASE_P(Tests, QuicDataStreamTest,
 116                         ::testing::ValuesIn(QuicSupportedVersions()));
 117
 118 TEST_P(QuicDataStreamTest, ProcessHeaders) {
 119   Initialize(kShouldProcessData);
 120
 121   string headers = SpdyUtils::SerializeUncompressedHeaders(headers_);
 122   stream_->OnStreamHeadersPriority(QuicUtils::HighestPriority());
 123   stream_->OnStreamHeaders(headers);
 124   EXPECT_EQ(headers, stream_->data());
 125   stream_->OnStreamHeadersComplete(false, headers.size());
 126   EXPECT_EQ(QuicUtils::HighestPriority(), stream_->EffectivePriority());
 127   EXPECT_EQ(headers, stream_->data());
 128   EXPECT_FALSE(stream_->IsDoneReading());
 129 }
 130
 131 TEST_P(QuicDataStreamTest, ProcessHeadersAndBody) {
 132   Initialize(kShouldProcessData);
 133
 134   string headers = SpdyUtils::SerializeUncompressedHeaders(headers_);
 135   string body = "this is the body";
 136
 137   stream_->OnStreamHeaders(headers);
 138   EXPECT_EQ(headers, stream_->data());
 139   stream_->OnStreamHeadersComplete(false, headers.size());
 140   QuicStreamFrame frame(kClientDataStreamId1, false, 0, MakeIOVector(body));
 141   stream_->OnStreamFrame(frame);
 142
 143   EXPECT_EQ(headers + body, stream_->data());
 144 }
 145
 146 TEST_P(QuicDataStreamTest, ProcessHeadersAndBodyFragments) {
 147   string headers = SpdyUtils::SerializeUncompressedHeaders(headers_);
 148   string body = "this is the body";
 149
 150   for (size_t fragment_size = 1; fragment_size < body.size();
 151        ++fragment_size) {
 152     Initialize(kShouldProcessData);
 153     for (size_t offset = 0; offset < headers.size();
 154          offset += fragment_size) {
 155       size_t remaining_data = headers.size() - offset;
 156       StringPiece fragment(headers.data() + offset,
 157                            min(fragment_size, remaining_data));
 158       stream_->OnStreamHeaders(fragment);
 159     }
 160     stream_->OnStreamHeadersComplete(false, headers.size());
 161     for (size_t offset = 0; offset < body.size(); offset += fragment_size) {
 162       size_t remaining_data = body.size() - offset;
 163       StringPiece fragment(body.data() + offset,
 164                            min(fragment_size, remaining_data));
 165       QuicStreamFrame frame(kClientDataStreamId1, false, offset,
 166                             MakeIOVector(fragment));
 167       stream_->OnStreamFrame(frame);
 168     }
 169     ASSERT_EQ(headers + body,
 170               stream_->data()) << "fragment_size: " << fragment_size;
 171   }
 172 }
 173
 174 TEST_P(QuicDataStreamTest, ProcessHeadersAndBodyFragmentsSplit) {
 175   string headers = SpdyUtils::SerializeUncompressedHeaders(headers_);
 176   string body = "this is the body";
 177
 178   for (size_t split_point = 1; split_point < body.size() - 1; ++split_point) {
 179     Initialize(kShouldProcessData);
 180     StringPiece headers1(headers.data(), split_point);
 181     stream_->OnStreamHeaders(headers1);
 182
 183     StringPiece headers2(headers.data() + split_point,
 184                          headers.size() - split_point);
 185     stream_->OnStreamHeaders(headers2);
 186     stream_->OnStreamHeadersComplete(false, headers.size());
 187
 188     StringPiece fragment1(body.data(), split_point);
 189     QuicStreamFrame frame1(kClientDataStreamId1, false, 0,
 190                            MakeIOVector(fragment1));
 191     stream_->OnStreamFrame(frame1);
 192
 193     StringPiece fragment2(body.data() + split_point,
 194                           body.size() - split_point);
 195     QuicStreamFrame frame2(kClientDataStreamId1, false, split_point,
 196                            MakeIOVector(fragment2));
 197     stream_->OnStreamFrame(frame2);
 198
 199     ASSERT_EQ(headers + body,
 200               stream_->data()) << "split_point: " << split_point;
 201   }
 202 }
 203
 204 TEST_P(QuicDataStreamTest, ProcessHeadersAndBodyReadv) {
 205   Initialize(!kShouldProcessData);
 206
 207   string headers = SpdyUtils::SerializeUncompressedHeaders(headers_);
 208   string body = "this is the body";
 209
 210   stream_->OnStreamHeaders(headers);
 211   EXPECT_EQ(headers, stream_->data());
 212   stream_->OnStreamHeadersComplete(false, headers.size());
 213   QuicStreamFrame frame(kClientDataStreamId1, false, 0, MakeIOVector(body));
 214   stream_->OnStreamFrame(frame);
 215
 216   char buffer[2048];
 217   ASSERT_LT(headers.length() + body.length(), arraysize(buffer));
 218   struct iovec vec;
 219   vec.iov_base = buffer;
 220   vec.iov_len = arraysize(buffer);
 221
 222   size_t bytes_read = stream_->Readv(&vec, 1);
 223   EXPECT_EQ(headers.length(), bytes_read);
 224   EXPECT_EQ(headers, string(buffer, bytes_read));
 225
 226   bytes_read = stream_->Readv(&vec, 1);
 227   EXPECT_EQ(body.length(), bytes_read);
 228   EXPECT_EQ(body, string(buffer, bytes_read));
 229 }
 230
 231 TEST_P(QuicDataStreamTest, ProcessHeadersAndBodyIncrementalReadv) {
 232   Initialize(!kShouldProcessData);
 233
 234   string headers = SpdyUtils::SerializeUncompressedHeaders(headers_);
 235   string body = "this is the body";
 236   stream_->OnStreamHeaders(headers);
 237   EXPECT_EQ(headers, stream_->data());
 238   stream_->OnStreamHeadersComplete(false, headers.size());
 239   QuicStreamFrame frame(kClientDataStreamId1, false, 0, MakeIOVector(body));
 240   stream_->OnStreamFrame(frame);
 241
 242   char buffer[1];
 243   struct iovec vec;
 244   vec.iov_base = buffer;
 245   vec.iov_len = arraysize(buffer);
 246
 247   string data = headers + body;
 248   for (size_t i = 0; i < data.length(); ++i) {
 249     size_t bytes_read = stream_->Readv(&vec, 1);
 250     ASSERT_EQ(1u, bytes_read);
 251     EXPECT_EQ(data.data()[i], buffer[0]);
 252   }
 253 }
 254
 255 TEST_P(QuicDataStreamTest, ProcessHeadersUsingReadvWithMultipleIovecs) {
 256   Initialize(!kShouldProcessData);
 257
 258   string headers = SpdyUtils::SerializeUncompressedHeaders(headers_);
 259   string body = "this is the body";
 260   stream_->OnStreamHeaders(headers);
 261   EXPECT_EQ(headers, stream_->data());
 262   stream_->OnStreamHeadersComplete(false, headers.size());
 263   QuicStreamFrame frame(kClientDataStreamId1, false, 0, MakeIOVector(body));
 264   stream_->OnStreamFrame(frame);
 265
 266   char buffer1[1];
 267   char buffer2[1];
 268   struct iovec vec[2];
 269   vec[0].iov_base = buffer1;
 270   vec[0].iov_len = arraysize(buffer1);
 271   vec[1].iov_base = buffer2;
 272   vec[1].iov_len = arraysize(buffer2);
 273   string data = headers + body;
 274   for (size_t i = 0; i < data.length(); i += 2) {
 275     size_t bytes_read = stream_->Readv(vec, 2);
 276     ASSERT_EQ(2u, bytes_read) << i;
 277     ASSERT_EQ(data.data()[i], buffer1[0]) << i;
 278     ASSERT_EQ(data.data()[i + 1], buffer2[0]) << i;
 279   }
 280 }
 281
 282 TEST_P(QuicDataStreamTest, StreamFlowControlBlocked) {
 283   // Tests that we send a BLOCKED frame to the peer when we attempt to write,
 284   // but are flow control blocked.
 285   if (GetParam() <= QUIC_VERSION_16) {
 286     return;
 287   }
 288
 289   Initialize(kShouldProcessData);
 290
 291   // Set a small flow control limit.
 292   const uint64 kWindow = 36;
 293   QuicFlowControllerPeer::SetSendWindowOffset(stream_->flow_controller(),
 294                                               kWindow);
 295   EXPECT_EQ(kWindow, QuicFlowControllerPeer::SendWindowOffset(
 296                          stream_->flow_controller()));
 297
 298   // Try to send more data than the flow control limit allows.
 299   string headers = SpdyUtils::SerializeUncompressedHeaders(headers_);
 300   string body;
 301   const uint64 kOverflow = 15;
 302   GenerateBody(&body, kWindow + kOverflow);
 303
 304   EXPECT_CALL(*connection_, SendBlocked(kClientDataStreamId1));
 305   EXPECT_CALL(*session_, WritevData(kClientDataStreamId1, _, _, _, _, _))
 306       .WillOnce(Return(QuicConsumedData(kWindow, true)));
 307   stream_->WriteOrBufferData(body, false, NULL);
 308
 309   // Should have sent as much as possible, resulting in no send window left.
 310   EXPECT_EQ(0u,
 311             QuicFlowControllerPeer::SendWindowSize(stream_->flow_controller()));
 312
 313   // And we should have queued the overflowed data.
 314   EXPECT_EQ(kOverflow,
 315             ReliableQuicStreamPeer::SizeOfQueuedData(stream_.get()));
 316 }
 317
 318 TEST_P(QuicDataStreamTest, StreamFlowControlNoWindowUpdateIfNotConsumed) {
 319   // The flow control receive window decreases whenever we add new bytes to the
 320   // sequencer, whether they are consumed immediately or buffered. However we
 321   // only send WINDOW_UPDATE frames based on increasing number of bytes
 322   // consumed.
 323   if (GetParam() <= QUIC_VERSION_16) {
 324     return;
 325   }
 326
 327   // Don't process data - it will be buffered instead.
 328   Initialize(!kShouldProcessData);
 329
 330   // Expect no WINDOW_UPDATE frames to be sent.
 331   EXPECT_CALL(*connection_, SendWindowUpdate(_, _)).Times(0);
 332
 333   // Set a small flow control receive window.
 334   const uint64 kWindow = 36;
 335   QuicFlowControllerPeer::SetReceiveWindowOffset(stream_->flow_controller(),
 336                                                  kWindow);
 337   QuicFlowControllerPeer::SetMaxReceiveWindow(stream_->flow_controller(),
 338                                               kWindow);
 339   EXPECT_EQ(kWindow, QuicFlowControllerPeer::ReceiveWindowOffset(
 340                          stream_->flow_controller()));
 341
 342   // Stream receives enough data to fill a fraction of the receive window.
 343   string headers = SpdyUtils::SerializeUncompressedHeaders(headers_);
 344   string body;
 345   GenerateBody(&body, kWindow / 3);
 346   stream_->OnStreamHeaders(headers);
 347   EXPECT_EQ(headers, stream_->data());
 348   stream_->OnStreamHeadersComplete(false, headers.size());
 349
 350   QuicStreamFrame frame1(kClientDataStreamId1, false, 0, MakeIOVector(body));
 351   stream_->OnStreamFrame(frame1);
 352   EXPECT_EQ(kWindow - (kWindow / 3), QuicFlowControllerPeer::ReceiveWindowSize(
 353                                          stream_->flow_controller()));
 354
 355   // Now receive another frame which results in the receive window being over
 356   // half full. This should all be buffered, decreasing the receive window but
 357   // not sending WINDOW_UPDATE.
 358   QuicStreamFrame frame2(kClientDataStreamId1, false, kWindow / 3,
 359                          MakeIOVector(body));
 360   stream_->OnStreamFrame(frame2);
 361   EXPECT_EQ(
 362       kWindow - (2 * kWindow / 3),
 363       QuicFlowControllerPeer::ReceiveWindowSize(stream_->flow_controller()));
 364 }
 365
 366 TEST_P(QuicDataStreamTest, StreamFlowControlWindowUpdate) {
 367   // Tests that on receipt of data, the stream updates its receive window offset
 368   // appropriately, and sends WINDOW_UPDATE frames when its receive window drops
 369   // too low.
 370   if (GetParam() <= QUIC_VERSION_16) {
 371     return;
 372   }
 373
 374   Initialize(kShouldProcessData);
 375
 376   // Set a small flow control limit.
 377   const uint64 kWindow = 36;
 378   QuicFlowControllerPeer::SetReceiveWindowOffset(stream_->flow_controller(),
 379                                                  kWindow);
 380   QuicFlowControllerPeer::SetMaxReceiveWindow(stream_->flow_controller(),
 381                                               kWindow);
 382   EXPECT_EQ(kWindow, QuicFlowControllerPeer::ReceiveWindowOffset(
 383                          stream_->flow_controller()));
 384
 385   // Stream receives enough data to fill a fraction of the receive window.
 386   string headers = SpdyUtils::SerializeUncompressedHeaders(headers_);
 387   string body;
 388   GenerateBody(&body, kWindow / 3);
 389   stream_->OnStreamHeaders(headers);
 390   EXPECT_EQ(headers, stream_->data());
 391   stream_->OnStreamHeadersComplete(false, headers.size());
 392
 393   QuicStreamFrame frame1(kClientDataStreamId1, false, 0, MakeIOVector(body));
 394   stream_->OnStreamFrame(frame1);
 395   EXPECT_EQ(kWindow - (kWindow / 3), QuicFlowControllerPeer::ReceiveWindowSize(
 396                                          stream_->flow_controller()));
 397
 398   // Now receive another frame which results in the receive window being over
 399   // half full.  This will trigger the stream to increase its receive window
 400   // offset and send a WINDOW_UPDATE. The result will be again an available
 401   // window of kWindow bytes.
 402   QuicStreamFrame frame2(kClientDataStreamId1, false, kWindow / 3,
 403                          MakeIOVector(body));
 404   EXPECT_CALL(*connection_,
 405               SendWindowUpdate(kClientDataStreamId1,
 406                                QuicFlowControllerPeer::ReceiveWindowOffset(
 407                                    stream_->flow_controller()) +
 408                                    2 * kWindow / 3));
 409   stream_->OnStreamFrame(frame2);
 410   EXPECT_EQ(kWindow, QuicFlowControllerPeer::ReceiveWindowSize(
 411                          stream_->flow_controller()));
 412 }
 413
 414 TEST_P(QuicDataStreamTest, ConnectionFlowControlWindowUpdate) {
 415   // Tests that on receipt of data, the connection updates its receive window
 416   // offset appropriately, and sends WINDOW_UPDATE frames when its receive
 417   // window drops too low.
 418   if (GetParam() < QUIC_VERSION_19) {
 419     return;
 420   }
 421   ValueRestore<bool> old_flag(&FLAGS_enable_quic_connection_flow_control_2,
 422                               true);
 423
 424   Initialize(kShouldProcessData);
 425
 426   // Set a small flow control limit for streams and connection.
 427   const uint64 kWindow = 36;
 428   QuicFlowControllerPeer::SetReceiveWindowOffset(stream_->flow_controller(),
 429                                                  kWindow);
 430   QuicFlowControllerPeer::SetMaxReceiveWindow(stream_->flow_controller(),
 431                                               kWindow);
 432   QuicFlowControllerPeer::SetReceiveWindowOffset(stream2_->flow_controller(),
 433                                                  kWindow);
 434   QuicFlowControllerPeer::SetMaxReceiveWindow(stream2_->flow_controller(),
 435                                               kWindow);
 436   QuicFlowControllerPeer::SetReceiveWindowOffset(session_->flow_controller(),
 437                                                  kWindow);
 438   QuicFlowControllerPeer::SetMaxReceiveWindow(session_->flow_controller(),
 439                                               kWindow);
 440
 441   // Supply headers to both streams so that they are happy to receive data.
 442   string headers = SpdyUtils::SerializeUncompressedHeaders(headers_);
 443   stream_->OnStreamHeaders(headers);
 444   stream_->OnStreamHeadersComplete(false, headers.size());
 445   stream2_->OnStreamHeaders(headers);
 446   stream2_->OnStreamHeadersComplete(false, headers.size());
 447
 448   // Each stream gets a quarter window of data. This should not trigger a
 449   // WINDOW_UPDATE for either stream, nor for the connection.
 450   string body;
 451   GenerateBody(&body, kWindow / 4);
 452   QuicStreamFrame frame1(kClientDataStreamId1, false, 0, MakeIOVector(body));
 453   stream_->OnStreamFrame(frame1);
 454   QuicStreamFrame frame2(kClientDataStreamId2, false, 0, MakeIOVector(body));
 455   stream2_->OnStreamFrame(frame2);
 456
 457   // Now receive a further single byte on one stream - again this does not
 458   // trigger a stream WINDOW_UPDATE, but now the connection flow control window
 459   // is over half full and thus a connection WINDOW_UPDATE is sent.
 460   EXPECT_CALL(*connection_, SendWindowUpdate(kClientDataStreamId1, _)).Times(0);
 461   EXPECT_CALL(*connection_, SendWindowUpdate(kClientDataStreamId2, _)).Times(0);
 462   EXPECT_CALL(*connection_,
 463               SendWindowUpdate(0, QuicFlowControllerPeer::ReceiveWindowOffset(
 464                                       session_->flow_controller()) +
 465                                       1 + kWindow / 2));
 466   QuicStreamFrame frame3(kClientDataStreamId1, false, (kWindow / 4),
 467                          MakeIOVector("a"));
 468   stream_->OnStreamFrame(frame3);
 469 }
 470
 471 TEST_P(QuicDataStreamTest, StreamFlowControlViolation) {
 472   // Tests that on if the peer sends too much data (i.e. violates the flow
 473   // control protocol), then we terminate the connection.
 474   if (GetParam() <= QUIC_VERSION_16) {
 475     return;
 476   }
 477
 478   // Stream should not process data, so that data gets buffered in the
 479   // sequencer, triggering flow control limits.
 480   Initialize(!kShouldProcessData);
 481
 482   // Set a small flow control limit.
 483   const uint64 kWindow = 50;
 484   QuicFlowControllerPeer::SetReceiveWindowOffset(stream_->flow_controller(),
 485                                                  kWindow);
 486
 487   string headers = SpdyUtils::SerializeUncompressedHeaders(headers_);
 488   stream_->OnStreamHeaders(headers);
 489   EXPECT_EQ(headers, stream_->data());
 490   stream_->OnStreamHeadersComplete(false, headers.size());
 491
 492   // Receive data to overflow the window, violating flow control.
 493   string body;
 494   GenerateBody(&body, kWindow + 1);
 495   QuicStreamFrame frame(kClientDataStreamId1, false, 0, MakeIOVector(body));
 496   EXPECT_CALL(*connection_,
 497               SendConnectionClose(QUIC_FLOW_CONTROL_RECEIVED_TOO_MUCH_DATA));
 498   stream_->OnStreamFrame(frame);
 499 }
 500
 501 TEST_P(QuicDataStreamTest, ConnectionFlowControlViolation) {
 502   // Tests that on if the peer sends too much data (i.e. violates the flow
 503   // control protocol), at the connection level (rather than the stream level)
 504   // then we terminate the connection.
 505   if (GetParam() < QUIC_VERSION_19) {
 506     return;
 507   }
 508   ValueRestore<bool> old_flag(&FLAGS_enable_quic_connection_flow_control_2,
 509                               true);
 510
 511   // Stream should not process data, so that data gets buffered in the
 512   // sequencer, triggering flow control limits.
 513   Initialize(!kShouldProcessData);
 514
 515   // Set a small flow control window on streams, and connection.
 516   const uint64 kStreamWindow = 50;
 517   const uint64 kConnectionWindow = 10;
 518   QuicFlowControllerPeer::SetReceiveWindowOffset(stream_->flow_controller(),
 519                                                  kStreamWindow);
 520   QuicFlowControllerPeer::SetReceiveWindowOffset(session_->flow_controller(),
 521                                                  kConnectionWindow);
 522
 523   string headers = SpdyUtils::SerializeUncompressedHeaders(headers_);
 524   stream_->OnStreamHeaders(headers);
 525   EXPECT_EQ(headers, stream_->data());
 526   stream_->OnStreamHeadersComplete(false, headers.size());
 527
 528   // Send enough data to overflow the connection level flow control window.
 529   string body;
 530   GenerateBody(&body, kConnectionWindow + 1);
 531   EXPECT_LT(body.size(),  kStreamWindow);
 532   QuicStreamFrame frame(kClientDataStreamId1, false, 0, MakeIOVector(body));
 533
 534   EXPECT_CALL(*connection_,
 535               SendConnectionClose(QUIC_FLOW_CONTROL_RECEIVED_TOO_MUCH_DATA));
 536   stream_->OnStreamFrame(frame);
 537 }
 538
 539 TEST_P(QuicDataStreamTest, StreamFlowControlFinNotBlocked) {
 540   // An attempt to write a FIN with no data should not be flow control blocked,
 541   // even if the send window is 0.
 542   if (GetParam() <= QUIC_VERSION_16) {
 543     return;
 544   }
 545
 546   Initialize(kShouldProcessData);
 547
 548   // Set a flow control limit of zero.
 549   QuicFlowControllerPeer::SetReceiveWindowOffset(stream_->flow_controller(), 0);
 550   EXPECT_EQ(0u, QuicFlowControllerPeer::ReceiveWindowOffset(
 551                     stream_->flow_controller()));
 552
 553   // Send a frame with a FIN but no data. This should not be blocked.
 554   string body = "";
 555   bool fin = true;
 556
 557   EXPECT_CALL(*connection_, SendBlocked(kClientDataStreamId1)).Times(0);
 558   EXPECT_CALL(*session_, WritevData(kClientDataStreamId1, _, _, _, _, _))
 559       .WillOnce(Return(QuicConsumedData(0, fin)));
 560
 561   stream_->WriteOrBufferData(body, fin, NULL);
 562 }
 563
 564 }  // namespace
 565 }  // namespace test
 566 }  // namespace net