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1 // Copyright (c) 2012 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_session.h"
6 
7 #include <set>
8 #include <vector>
9 
10 #include "base/containers/hash_tables.h"
11 #include "net/quic/crypto/crypto_handshake.h"
12 #include "net/quic/quic_connection.h"
13 #include "net/quic/quic_protocol.h"
14 #include "net/quic/test_tools/quic_connection_peer.h"
15 #include "net/quic/test_tools/quic_data_stream_peer.h"
16 #include "net/quic/test_tools/quic_test_utils.h"
17 #include "net/quic/test_tools/reliable_quic_stream_peer.h"
18 #include "net/spdy/spdy_framer.h"
19 #include "testing/gmock/include/gmock/gmock.h"
20 #include "testing/gtest/include/gtest/gtest.h"
21 
22 using base::hash_map;
23 using std::set;
24 using std::vector;
25 using testing::_;
26 using testing::InSequence;
27 using testing::InvokeWithoutArgs;
28 using testing::StrictMock;
29 
30 namespace net {
31 namespace test {
32 namespace {
33 
34 const QuicPriority kSomeMiddlePriority = 2;
35 
36 class TestCryptoStream : public QuicCryptoStream {
37  public:
TestCryptoStream(QuicSession * session)38   explicit TestCryptoStream(QuicSession* session)
39       : QuicCryptoStream(session) {
40   }
41 
OnHandshakeMessage(const CryptoHandshakeMessage & message)42   virtual void OnHandshakeMessage(
43       const CryptoHandshakeMessage& message) OVERRIDE {
44     encryption_established_ = true;
45     handshake_confirmed_ = true;
46     CryptoHandshakeMessage msg;
47     string error_details;
48     session()->config()->ToHandshakeMessage(&msg);
49     const QuicErrorCode error = session()->config()->ProcessClientHello(
50         msg, &error_details);
51     EXPECT_EQ(QUIC_NO_ERROR, error);
52     session()->OnConfigNegotiated();
53     session()->OnCryptoHandshakeEvent(QuicSession::HANDSHAKE_CONFIRMED);
54   }
55 
56   MOCK_METHOD0(OnCanWrite, void());
57 };
58 
59 class TestStream : public QuicDataStream {
60  public:
TestStream(QuicStreamId id,QuicSession * session)61   TestStream(QuicStreamId id, QuicSession* session)
62       : QuicDataStream(id, session) {
63   }
64 
65   using ReliableQuicStream::CloseWriteSide;
66 
ProcessData(const char * data,uint32 data_len)67   virtual uint32 ProcessData(const char* data, uint32 data_len) {
68     return data_len;
69   }
70 
71   MOCK_METHOD0(OnCanWrite, void());
72 };
73 
74 // Poor man's functor for use as callback in a mock.
75 class StreamBlocker {
76  public:
StreamBlocker(QuicSession * session,QuicStreamId stream_id)77   StreamBlocker(QuicSession* session, QuicStreamId stream_id)
78       : session_(session),
79         stream_id_(stream_id) {
80   }
81 
MarkWriteBlocked()82   void MarkWriteBlocked() {
83     session_->MarkWriteBlocked(stream_id_, kSomeMiddlePriority);
84   }
85 
86  private:
87   QuicSession* const session_;
88   const QuicStreamId stream_id_;
89 };
90 
91 class TestSession : public QuicSession {
92  public:
TestSession(QuicConnection * connection)93   explicit TestSession(QuicConnection* connection)
94       : QuicSession(connection, DefaultQuicConfig()),
95         crypto_stream_(this) {
96   }
97 
GetCryptoStream()98   virtual TestCryptoStream* GetCryptoStream() OVERRIDE {
99     return &crypto_stream_;
100   }
101 
CreateOutgoingDataStream()102   virtual TestStream* CreateOutgoingDataStream() OVERRIDE {
103     TestStream* stream = new TestStream(GetNextStreamId(), this);
104     ActivateStream(stream);
105     return stream;
106   }
107 
CreateIncomingDataStream(QuicStreamId id)108   virtual TestStream* CreateIncomingDataStream(QuicStreamId id) OVERRIDE {
109     return new TestStream(id, this);
110   }
111 
IsClosedStream(QuicStreamId id)112   bool IsClosedStream(QuicStreamId id) {
113     return QuicSession::IsClosedStream(id);
114   }
115 
GetIncomingReliableStream(QuicStreamId stream_id)116   QuicDataStream* GetIncomingReliableStream(QuicStreamId stream_id) {
117     return QuicSession::GetIncomingReliableStream(stream_id);
118   }
119 
120   TestCryptoStream crypto_stream_;
121 };
122 
123 class QuicSessionTest : public ::testing::Test {
124  protected:
QuicSessionTest()125   QuicSessionTest()
126       : connection_(new MockConnection(true)),
127         session_(connection_) {
128     headers_[":host"] = "www.google.com";
129     headers_[":path"] = "/index.hml";
130     headers_[":scheme"] = "http";
131     headers_["cookie"] =
132         "__utma=208381060.1228362404.1372200928.1372200928.1372200928.1; "
133         "__utmc=160408618; "
134         "GX=DQAAAOEAAACWJYdewdE9rIrW6qw3PtVi2-d729qaa-74KqOsM1NVQblK4VhX"
135         "hoALMsy6HOdDad2Sz0flUByv7etmo3mLMidGrBoljqO9hSVA40SLqpG_iuKKSHX"
136         "RW3Np4bq0F0SDGDNsW0DSmTS9ufMRrlpARJDS7qAI6M3bghqJp4eABKZiRqebHT"
137         "pMU-RXvTI5D5oCF1vYxYofH_l1Kviuiy3oQ1kS1enqWgbhJ2t61_SNdv-1XJIS0"
138         "O3YeHLmVCs62O6zp89QwakfAWK9d3IDQvVSJzCQsvxvNIvaZFa567MawWlXg0Rh"
139         "1zFMi5vzcns38-8_Sns; "
140         "GA=v*2%2Fmem*57968640*47239936%2Fmem*57968640*47114716%2Fno-nm-"
141         "yj*15%2Fno-cc-yj*5%2Fpc-ch*133685%2Fpc-s-cr*133947%2Fpc-s-t*1339"
142         "47%2Fno-nm-yj*4%2Fno-cc-yj*1%2Fceft-as*1%2Fceft-nqas*0%2Fad-ra-c"
143         "v_p%2Fad-nr-cv_p-f*1%2Fad-v-cv_p*859%2Fad-ns-cv_p-f*1%2Ffn-v-ad%"
144         "2Fpc-t*250%2Fpc-cm*461%2Fpc-s-cr*722%2Fpc-s-t*722%2Fau_p*4"
145         "SICAID=AJKiYcHdKgxum7KMXG0ei2t1-W4OD1uW-ecNsCqC0wDuAXiDGIcT_HA2o1"
146         "3Rs1UKCuBAF9g8rWNOFbxt8PSNSHFuIhOo2t6bJAVpCsMU5Laa6lewuTMYI8MzdQP"
147         "ARHKyW-koxuhMZHUnGBJAM1gJODe0cATO_KGoX4pbbFxxJ5IicRxOrWK_5rU3cdy6"
148         "edlR9FsEdH6iujMcHkbE5l18ehJDwTWmBKBzVD87naobhMMrF6VvnDGxQVGp9Ir_b"
149         "Rgj3RWUoPumQVCxtSOBdX0GlJOEcDTNCzQIm9BSfetog_eP_TfYubKudt5eMsXmN6"
150         "QnyXHeGeK2UINUzJ-D30AFcpqYgH9_1BvYSpi7fc7_ydBU8TaD8ZRxvtnzXqj0RfG"
151         "tuHghmv3aD-uzSYJ75XDdzKdizZ86IG6Fbn1XFhYZM-fbHhm3mVEXnyRW4ZuNOLFk"
152         "Fas6LMcVC6Q8QLlHYbXBpdNFuGbuZGUnav5C-2I_-46lL0NGg3GewxGKGHvHEfoyn"
153         "EFFlEYHsBQ98rXImL8ySDycdLEFvBPdtctPmWCfTxwmoSMLHU2SCVDhbqMWU5b0yr"
154         "JBCScs_ejbKaqBDoB7ZGxTvqlrB__2ZmnHHjCr8RgMRtKNtIeuZAo ";
155   }
156 
CheckClosedStreams()157   void CheckClosedStreams() {
158     for (int i = kCryptoStreamId; i < 100; i++) {
159       if (closed_streams_.count(i) == 0) {
160         EXPECT_FALSE(session_.IsClosedStream(i)) << " stream id: " << i;
161       } else {
162         EXPECT_TRUE(session_.IsClosedStream(i)) << " stream id: " << i;
163       }
164     }
165   }
166 
CloseStream(QuicStreamId id)167   void CloseStream(QuicStreamId id) {
168     session_.CloseStream(id);
169     closed_streams_.insert(id);
170   }
171 
172   MockConnection* connection_;
173   TestSession session_;
174   set<QuicStreamId> closed_streams_;
175   SpdyHeaderBlock headers_;
176 };
177 
TEST_F(QuicSessionTest,PeerAddress)178 TEST_F(QuicSessionTest, PeerAddress) {
179   EXPECT_EQ(IPEndPoint(Loopback4(), kTestPort), session_.peer_address());
180 }
181 
TEST_F(QuicSessionTest,IsCryptoHandshakeConfirmed)182 TEST_F(QuicSessionTest, IsCryptoHandshakeConfirmed) {
183   EXPECT_FALSE(session_.IsCryptoHandshakeConfirmed());
184   CryptoHandshakeMessage message;
185   session_.crypto_stream_.OnHandshakeMessage(message);
186   EXPECT_TRUE(session_.IsCryptoHandshakeConfirmed());
187 }
188 
TEST_F(QuicSessionTest,IsClosedStreamDefault)189 TEST_F(QuicSessionTest, IsClosedStreamDefault) {
190   // Ensure that no streams are initially closed.
191   for (int i = kCryptoStreamId; i < 100; i++) {
192     EXPECT_FALSE(session_.IsClosedStream(i));
193   }
194 }
195 
TEST_F(QuicSessionTest,ImplicitlyCreatedStreams)196 TEST_F(QuicSessionTest, ImplicitlyCreatedStreams) {
197   ASSERT_TRUE(session_.GetIncomingReliableStream(7) != NULL);
198   // Both 3 and 5 should be implicitly created.
199   EXPECT_FALSE(session_.IsClosedStream(3));
200   EXPECT_FALSE(session_.IsClosedStream(5));
201   ASSERT_TRUE(session_.GetIncomingReliableStream(5) != NULL);
202   ASSERT_TRUE(session_.GetIncomingReliableStream(3) != NULL);
203 }
204 
TEST_F(QuicSessionTest,IsClosedStreamLocallyCreated)205 TEST_F(QuicSessionTest, IsClosedStreamLocallyCreated) {
206   TestStream* stream2 = session_.CreateOutgoingDataStream();
207   EXPECT_EQ(2u, stream2->id());
208   QuicDataStreamPeer::SetHeadersDecompressed(stream2, true);
209   TestStream* stream4 = session_.CreateOutgoingDataStream();
210   EXPECT_EQ(4u, stream4->id());
211   QuicDataStreamPeer::SetHeadersDecompressed(stream4, true);
212 
213   CheckClosedStreams();
214   CloseStream(4);
215   CheckClosedStreams();
216   CloseStream(2);
217   CheckClosedStreams();
218 }
219 
TEST_F(QuicSessionTest,IsClosedStreamPeerCreated)220 TEST_F(QuicSessionTest, IsClosedStreamPeerCreated) {
221   QuicDataStream* stream3 = session_.GetIncomingReliableStream(3);
222   QuicDataStreamPeer::SetHeadersDecompressed(stream3, true);
223   QuicDataStream* stream5 = session_.GetIncomingReliableStream(5);
224   QuicDataStreamPeer::SetHeadersDecompressed(stream5, true);
225 
226   CheckClosedStreams();
227   CloseStream(3);
228   CheckClosedStreams();
229   CloseStream(5);
230   // Create stream id 9, and implicitly 7
231   QuicDataStream* stream9 = session_.GetIncomingReliableStream(9);
232   QuicDataStreamPeer::SetHeadersDecompressed(stream9, true);
233   CheckClosedStreams();
234   // Close 9, but make sure 7 is still not closed
235   CloseStream(9);
236   CheckClosedStreams();
237 }
238 
TEST_F(QuicSessionTest,StreamIdTooLarge)239 TEST_F(QuicSessionTest, StreamIdTooLarge) {
240   session_.GetIncomingReliableStream(3);
241   EXPECT_CALL(*connection_, SendConnectionClose(QUIC_INVALID_STREAM_ID));
242   session_.GetIncomingReliableStream(105);
243 }
244 
TEST_F(QuicSessionTest,DecompressionError)245 TEST_F(QuicSessionTest, DecompressionError) {
246   ReliableQuicStream* stream = session_.GetIncomingReliableStream(3);
247   EXPECT_CALL(*connection_, SendConnectionClose(QUIC_DECOMPRESSION_FAILURE));
248   const char data[] =
249       "\0\0\0\0"   // priority
250       "\1\0\0\0"   // headers id
251       "\0\0\0\4"   // length
252       "abcd";      // invalid compressed data
253   stream->ProcessRawData(data, arraysize(data));
254 }
255 
TEST_F(QuicSessionTest,OnCanWrite)256 TEST_F(QuicSessionTest, OnCanWrite) {
257   TestStream* stream2 = session_.CreateOutgoingDataStream();
258   TestStream* stream4 = session_.CreateOutgoingDataStream();
259   TestStream* stream6 = session_.CreateOutgoingDataStream();
260 
261   session_.MarkWriteBlocked(stream2->id(), kSomeMiddlePriority);
262   session_.MarkWriteBlocked(stream6->id(), kSomeMiddlePriority);
263   session_.MarkWriteBlocked(stream4->id(), kSomeMiddlePriority);
264 
265   InSequence s;
266   StreamBlocker stream2_blocker(&session_, stream2->id());
267   EXPECT_CALL(*stream2, OnCanWrite()).WillOnce(
268       // Reregister, to test the loop limit.
269       InvokeWithoutArgs(&stream2_blocker, &StreamBlocker::MarkWriteBlocked));
270   EXPECT_CALL(*stream6, OnCanWrite());
271   EXPECT_CALL(*stream4, OnCanWrite());
272 
273   EXPECT_FALSE(session_.OnCanWrite());
274 }
275 
TEST_F(QuicSessionTest,BufferedHandshake)276 TEST_F(QuicSessionTest, BufferedHandshake) {
277   EXPECT_FALSE(session_.HasPendingHandshake());  // Default value.
278 
279   // Test that blocking other streams does not change our status.
280   TestStream* stream2 = session_.CreateOutgoingDataStream();
281   StreamBlocker stream2_blocker(&session_, stream2->id());
282   stream2_blocker.MarkWriteBlocked();
283   EXPECT_FALSE(session_.HasPendingHandshake());
284 
285   TestStream* stream3 = session_.CreateOutgoingDataStream();
286   StreamBlocker stream3_blocker(&session_, stream3->id());
287   stream3_blocker.MarkWriteBlocked();
288   EXPECT_FALSE(session_.HasPendingHandshake());
289 
290   // Blocking (due to buffering of) the Crypto stream is detected.
291   session_.MarkWriteBlocked(kCryptoStreamId, kSomeMiddlePriority);
292   EXPECT_TRUE(session_.HasPendingHandshake());
293 
294   TestStream* stream4 = session_.CreateOutgoingDataStream();
295   StreamBlocker stream4_blocker(&session_, stream4->id());
296   stream4_blocker.MarkWriteBlocked();
297   EXPECT_TRUE(session_.HasPendingHandshake());
298 
299   InSequence s;
300   // Force most streams to re-register, which is common scenario when we block
301   // the Crypto stream, and only the crypto stream can "really" write.
302 
303   // Due to prioritization, we *should* be asked to write the crypto stream
304   // first.
305   // Don't re-register the crypto stream (which signals complete writing).
306   TestCryptoStream* crypto_stream = session_.GetCryptoStream();
307   EXPECT_CALL(*crypto_stream, OnCanWrite());
308 
309   // Re-register all other streams, to show they weren't able to proceed.
310   EXPECT_CALL(*stream2, OnCanWrite()).WillOnce(
311       InvokeWithoutArgs(&stream2_blocker, &StreamBlocker::MarkWriteBlocked));
312 
313   EXPECT_CALL(*stream3, OnCanWrite()).WillOnce(
314       InvokeWithoutArgs(&stream3_blocker, &StreamBlocker::MarkWriteBlocked));
315 
316   EXPECT_CALL(*stream4, OnCanWrite()).WillOnce(
317       InvokeWithoutArgs(&stream4_blocker, &StreamBlocker::MarkWriteBlocked));
318 
319   EXPECT_FALSE(session_.OnCanWrite());
320   EXPECT_FALSE(session_.HasPendingHandshake());  // Crypto stream wrote.
321 }
322 
TEST_F(QuicSessionTest,OnCanWriteWithClosedStream)323 TEST_F(QuicSessionTest, OnCanWriteWithClosedStream) {
324   TestStream* stream2 = session_.CreateOutgoingDataStream();
325   TestStream* stream4 = session_.CreateOutgoingDataStream();
326   TestStream* stream6 = session_.CreateOutgoingDataStream();
327 
328   session_.MarkWriteBlocked(stream2->id(), kSomeMiddlePriority);
329   session_.MarkWriteBlocked(stream6->id(), kSomeMiddlePriority);
330   session_.MarkWriteBlocked(stream4->id(), kSomeMiddlePriority);
331   CloseStream(stream6->id());
332 
333   InSequence s;
334   EXPECT_CALL(*stream2, OnCanWrite());
335   EXPECT_CALL(*stream4, OnCanWrite());
336   EXPECT_TRUE(session_.OnCanWrite());
337 }
338 
339 // Regression test for http://crbug.com/248737
TEST_F(QuicSessionTest,OutOfOrderHeaders)340 TEST_F(QuicSessionTest, OutOfOrderHeaders) {
341   QuicSpdyCompressor compressor;
342   vector<QuicStreamFrame> frames;
343   QuicPacketHeader header;
344   header.public_header.guid = session_.guid();
345 
346   TestStream* stream2 = session_.CreateOutgoingDataStream();
347   TestStream* stream4 = session_.CreateOutgoingDataStream();
348   stream2->CloseWriteSide();
349   stream4->CloseWriteSide();
350 
351   // Create frame with headers for stream2.
352   string compressed_headers1 = compressor.CompressHeaders(headers_);
353   QuicStreamFrame frame1(
354       stream2->id(), false, 0, MakeIOVector(compressed_headers1));
355 
356   // Create frame with headers for stream4.
357   string compressed_headers2 = compressor.CompressHeaders(headers_);
358   QuicStreamFrame frame2(
359       stream4->id(), true, 0, MakeIOVector(compressed_headers2));
360 
361   // Process the second frame first.  This will cause the headers to
362   // be queued up and processed after the first frame is processed.
363   frames.push_back(frame2);
364   session_.OnStreamFrames(frames);
365 
366   // Process the first frame, and un-cork the buffered headers.
367   frames[0] = frame1;
368   session_.OnStreamFrames(frames);
369 
370   // Ensure that the streams actually close and we don't DCHECK.
371   connection_->CloseConnection(QUIC_CONNECTION_TIMED_OUT, true);
372 }
373 
TEST_F(QuicSessionTest,SendGoAway)374 TEST_F(QuicSessionTest, SendGoAway) {
375   // After sending a GoAway, ensure new incoming streams cannot be created and
376   // result in a RST being sent.
377   EXPECT_CALL(*connection_,
378               SendGoAway(QUIC_PEER_GOING_AWAY, 0u, "Going Away."));
379   session_.SendGoAway(QUIC_PEER_GOING_AWAY, "Going Away.");
380   EXPECT_TRUE(session_.goaway_sent());
381 
382   EXPECT_CALL(*connection_, SendRstStream(3u, QUIC_STREAM_PEER_GOING_AWAY));
383   EXPECT_FALSE(session_.GetIncomingReliableStream(3u));
384 }
385 
TEST_F(QuicSessionTest,IncreasedTimeoutAfterCryptoHandshake)386 TEST_F(QuicSessionTest, IncreasedTimeoutAfterCryptoHandshake) {
387   EXPECT_EQ(kDefaultInitialTimeoutSecs,
388             QuicConnectionPeer::GetNetworkTimeout(connection_).ToSeconds());
389   CryptoHandshakeMessage msg;
390   session_.crypto_stream_.OnHandshakeMessage(msg);
391   EXPECT_EQ(kDefaultTimeoutSecs,
392             QuicConnectionPeer::GetNetworkTimeout(connection_).ToSeconds());
393 }
394 
TEST_F(QuicSessionTest,ZombieStream)395 TEST_F(QuicSessionTest, ZombieStream) {
396   StrictMock<MockConnection>* connection =
397       new StrictMock<MockConnection>(false);
398   TestSession session(connection);
399 
400   TestStream* stream3 = session.CreateOutgoingDataStream();
401   EXPECT_EQ(3u, stream3->id());
402   TestStream* stream5 = session.CreateOutgoingDataStream();
403   EXPECT_EQ(5u, stream5->id());
404   EXPECT_EQ(2u, session.GetNumOpenStreams());
405 
406   // Reset the stream, but since the headers have not been decompressed
407   // it will become a zombie and will continue to process data
408   // until the headers are decompressed.
409   EXPECT_CALL(*connection, SendRstStream(3, QUIC_STREAM_CANCELLED));
410   session.SendRstStream(3, QUIC_STREAM_CANCELLED);
411 
412   EXPECT_EQ(1u, session.GetNumOpenStreams());
413 
414   vector<QuicStreamFrame> frames;
415   QuicPacketHeader header;
416   header.public_header.guid = session_.guid();
417 
418   // Create frame with headers for stream2.
419   QuicSpdyCompressor compressor;
420   string compressed_headers1 = compressor.CompressHeaders(headers_);
421   QuicStreamFrame frame1(
422       stream3->id(), false, 0, MakeIOVector(compressed_headers1));
423 
424   // Process the second frame first.  This will cause the headers to
425   // be queued up and processed after the first frame is processed.
426   frames.push_back(frame1);
427   EXPECT_FALSE(stream3->headers_decompressed());
428 
429   session.OnStreamFrames(frames);
430   EXPECT_EQ(1u, session.GetNumOpenStreams());
431 
432   EXPECT_TRUE(connection->connected());
433 }
434 
TEST_F(QuicSessionTest,ZombieStreamConnectionClose)435 TEST_F(QuicSessionTest, ZombieStreamConnectionClose) {
436   StrictMock<MockConnection>* connection =
437       new StrictMock<MockConnection>(false);
438   TestSession session(connection);
439 
440   TestStream* stream3 = session.CreateOutgoingDataStream();
441   EXPECT_EQ(3u, stream3->id());
442   TestStream* stream5 = session.CreateOutgoingDataStream();
443   EXPECT_EQ(5u, stream5->id());
444   EXPECT_EQ(2u, session.GetNumOpenStreams());
445 
446   stream3->CloseWriteSide();
447   // Reset the stream, but since the headers have not been decompressed
448   // it will become a zombie and will continue to process data
449   // until the headers are decompressed.
450   EXPECT_CALL(*connection, SendRstStream(3, QUIC_STREAM_CANCELLED));
451   session.SendRstStream(3, QUIC_STREAM_CANCELLED);
452 
453   EXPECT_EQ(1u, session.GetNumOpenStreams());
454 
455   connection->CloseConnection(QUIC_CONNECTION_TIMED_OUT, false);
456 
457   EXPECT_EQ(0u, session.GetNumOpenStreams());
458 }
459 
TEST_F(QuicSessionTest,RstStreamBeforeHeadersDecompressed)460 TEST_F(QuicSessionTest, RstStreamBeforeHeadersDecompressed) {
461   // Send two bytes of payload.
462   QuicStreamFrame data1(3, false, 0, MakeIOVector("HT"));
463   vector<QuicStreamFrame> frames;
464   frames.push_back(data1);
465   EXPECT_TRUE(session_.OnStreamFrames(frames));
466   EXPECT_EQ(1u, session_.GetNumOpenStreams());
467 
468   // Send a reset before the headers have been decompressed.  This causes
469   // an unrecoverable compression context state.
470   EXPECT_CALL(*connection_, SendConnectionClose(
471       QUIC_STREAM_RST_BEFORE_HEADERS_DECOMPRESSED));
472 
473   QuicRstStreamFrame rst1(3, QUIC_STREAM_NO_ERROR);
474   session_.OnRstStream(rst1);
475   EXPECT_EQ(0u, session_.GetNumOpenStreams());
476 }
477 
478 }  // namespace
479 }  // namespace test
480 }  // namespace net
481