| // Copyright 2013 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 "quic/tools/quic_simple_server_session.h" | 
 |  | 
 | #include <algorithm> | 
 | #include <memory> | 
 | #include <utility> | 
 |  | 
 | #include "absl/strings/str_cat.h" | 
 | #include "quic/core/crypto/null_encrypter.h" | 
 | #include "quic/core/crypto/quic_crypto_server_config.h" | 
 | #include "quic/core/crypto/quic_random.h" | 
 | #include "quic/core/http/http_encoder.h" | 
 | #include "quic/core/proto/cached_network_parameters_proto.h" | 
 | #include "quic/core/quic_connection.h" | 
 | #include "quic/core/quic_crypto_server_stream.h" | 
 | #include "quic/core/quic_utils.h" | 
 | #include "quic/core/quic_versions.h" | 
 | #include "quic/core/tls_server_handshaker.h" | 
 | #include "quic/platform/api/quic_containers.h" | 
 | #include "quic/platform/api/quic_expect_bug.h" | 
 | #include "quic/platform/api/quic_flags.h" | 
 | #include "quic/platform/api/quic_socket_address.h" | 
 | #include "quic/platform/api/quic_test.h" | 
 | #include "quic/test_tools/crypto_test_utils.h" | 
 | #include "quic/test_tools/mock_quic_session_visitor.h" | 
 | #include "quic/test_tools/quic_config_peer.h" | 
 | #include "quic/test_tools/quic_connection_peer.h" | 
 | #include "quic/test_tools/quic_sent_packet_manager_peer.h" | 
 | #include "quic/test_tools/quic_session_peer.h" | 
 | #include "quic/test_tools/quic_spdy_session_peer.h" | 
 | #include "quic/test_tools/quic_stream_peer.h" | 
 | #include "quic/test_tools/quic_sustained_bandwidth_recorder_peer.h" | 
 | #include "quic/test_tools/quic_test_utils.h" | 
 | #include "quic/tools/quic_backend_response.h" | 
 | #include "quic/tools/quic_memory_cache_backend.h" | 
 | #include "quic/tools/quic_simple_server_stream.h" | 
 |  | 
 | using testing::_; | 
 | using testing::AtLeast; | 
 | using testing::InSequence; | 
 | using testing::Invoke; | 
 | using testing::Return; | 
 | using testing::StrictMock; | 
 |  | 
 | namespace quic { | 
 | namespace test { | 
 | namespace { | 
 |  | 
 | // Data to be sent on a request stream.  In Google QUIC, this is interpreted as | 
 | // DATA payload (there is no framing on request streams).  In IETF QUIC, this is | 
 | // interpreted as HEADERS frame (type 0x1) with payload length 122 ('z').  Since | 
 | // no payload is included, QPACK decoder will not be invoked. | 
 | const char* const kStreamData = "\1z"; | 
 |  | 
 | }  // namespace | 
 |  | 
 | class QuicSimpleServerSessionPeer { | 
 |  public: | 
 |   static void SetCryptoStream(QuicSimpleServerSession* s, | 
 |                               QuicCryptoServerStreamBase* crypto_stream) { | 
 |     s->crypto_stream_.reset(crypto_stream); | 
 |   } | 
 |  | 
 |   static QuicSpdyStream* CreateIncomingStream(QuicSimpleServerSession* s, | 
 |                                               QuicStreamId id) { | 
 |     return s->CreateIncomingStream(id); | 
 |   } | 
 |  | 
 |   static QuicSimpleServerStream* CreateOutgoingUnidirectionalStream( | 
 |       QuicSimpleServerSession* s) { | 
 |     return s->CreateOutgoingUnidirectionalStream(); | 
 |   } | 
 | }; | 
 |  | 
 | namespace { | 
 |  | 
 | const size_t kMaxStreamsForTest = 10; | 
 |  | 
 | class MockQuicCryptoServerStream : public QuicCryptoServerStream { | 
 |  public: | 
 |   explicit MockQuicCryptoServerStream( | 
 |       const QuicCryptoServerConfig* crypto_config, | 
 |       QuicCompressedCertsCache* compressed_certs_cache, | 
 |       QuicSession* session, | 
 |       QuicCryptoServerStreamBase::Helper* helper) | 
 |       : QuicCryptoServerStream(crypto_config, | 
 |                                compressed_certs_cache, | 
 |                                session, | 
 |                                helper) {} | 
 |   MockQuicCryptoServerStream(const MockQuicCryptoServerStream&) = delete; | 
 |   MockQuicCryptoServerStream& operator=(const MockQuicCryptoServerStream&) = | 
 |       delete; | 
 |   ~MockQuicCryptoServerStream() override {} | 
 |  | 
 |   MOCK_METHOD(void, | 
 |               SendServerConfigUpdate, | 
 |               (const CachedNetworkParameters*), | 
 |               (override)); | 
 |  | 
 |   bool encryption_established() const override { return true; } | 
 | }; | 
 |  | 
 | class MockTlsServerHandshaker : public TlsServerHandshaker { | 
 |  public: | 
 |   explicit MockTlsServerHandshaker(QuicSession* session, | 
 |                                    const QuicCryptoServerConfig* crypto_config) | 
 |       : TlsServerHandshaker(session, crypto_config) {} | 
 |   MockTlsServerHandshaker(const MockTlsServerHandshaker&) = delete; | 
 |   MockTlsServerHandshaker& operator=(const MockTlsServerHandshaker&) = delete; | 
 |   ~MockTlsServerHandshaker() override {} | 
 |  | 
 |   MOCK_METHOD(void, | 
 |               SendServerConfigUpdate, | 
 |               (const CachedNetworkParameters*), | 
 |               (override)); | 
 |  | 
 |   bool encryption_established() const override { return true; } | 
 | }; | 
 |  | 
 | QuicCryptoServerStreamBase* CreateMockCryptoServerStream( | 
 |     const QuicCryptoServerConfig* crypto_config, | 
 |     QuicCompressedCertsCache* compressed_certs_cache, | 
 |     QuicSession* session, | 
 |     QuicCryptoServerStreamBase::Helper* helper) { | 
 |   switch (session->connection()->version().handshake_protocol) { | 
 |     case PROTOCOL_QUIC_CRYPTO: | 
 |       return new MockQuicCryptoServerStream( | 
 |           crypto_config, compressed_certs_cache, session, helper); | 
 |     case PROTOCOL_TLS1_3: | 
 |       return new MockTlsServerHandshaker(session, crypto_config); | 
 |     case PROTOCOL_UNSUPPORTED: | 
 |       break; | 
 |   } | 
 |   QUIC_BUG(quic_bug_10933_1) | 
 |       << "Unknown handshake protocol: " | 
 |       << static_cast<int>(session->connection()->version().handshake_protocol); | 
 |   return nullptr; | 
 | } | 
 |  | 
 | class MockQuicConnectionWithSendStreamData : public MockQuicConnection { | 
 |  public: | 
 |   MockQuicConnectionWithSendStreamData( | 
 |       MockQuicConnectionHelper* helper, | 
 |       MockAlarmFactory* alarm_factory, | 
 |       Perspective perspective, | 
 |       const ParsedQuicVersionVector& supported_versions) | 
 |       : MockQuicConnection(helper, | 
 |                            alarm_factory, | 
 |                            perspective, | 
 |                            supported_versions) { | 
 |     auto consume_all_data = [](QuicStreamId /*id*/, size_t write_length, | 
 |                                QuicStreamOffset /*offset*/, | 
 |                                StreamSendingState state) { | 
 |       return QuicConsumedData(write_length, state != NO_FIN); | 
 |     }; | 
 |     ON_CALL(*this, SendStreamData(_, _, _, _)) | 
 |         .WillByDefault(Invoke(consume_all_data)); | 
 |   } | 
 |  | 
 |   MOCK_METHOD(QuicConsumedData, | 
 |               SendStreamData, | 
 |               (QuicStreamId id, | 
 |                size_t write_length, | 
 |                QuicStreamOffset offset, | 
 |                StreamSendingState state), | 
 |               (override)); | 
 | }; | 
 |  | 
 | class MockQuicSimpleServerSession : public QuicSimpleServerSession { | 
 |  public: | 
 |   MockQuicSimpleServerSession( | 
 |       const QuicConfig& config, | 
 |       QuicConnection* connection, | 
 |       QuicSession::Visitor* visitor, | 
 |       QuicCryptoServerStreamBase::Helper* helper, | 
 |       const QuicCryptoServerConfig* crypto_config, | 
 |       QuicCompressedCertsCache* compressed_certs_cache, | 
 |       QuicSimpleServerBackend* quic_simple_server_backend) | 
 |       : QuicSimpleServerSession(config, | 
 |                                 CurrentSupportedVersions(), | 
 |                                 connection, | 
 |                                 visitor, | 
 |                                 helper, | 
 |                                 crypto_config, | 
 |                                 compressed_certs_cache, | 
 |                                 quic_simple_server_backend) {} | 
 |   // Methods taking non-copyable types like Http2HeaderBlock by value cannot be | 
 |   // mocked directly. | 
 |   void WritePushPromise(QuicStreamId original_stream_id, | 
 |                         QuicStreamId promised_stream_id, | 
 |                         spdy::Http2HeaderBlock headers) override { | 
 |     return WritePushPromiseMock(original_stream_id, promised_stream_id, | 
 |                                 headers); | 
 |   } | 
 |   MOCK_METHOD(void, | 
 |               WritePushPromiseMock, | 
 |               (QuicStreamId original_stream_id, | 
 |                QuicStreamId promised_stream_id, | 
 |                const spdy::Http2HeaderBlock& headers), | 
 |               ()); | 
 |  | 
 |   MOCK_METHOD(void, SendBlocked, (QuicStreamId), (override)); | 
 |   MOCK_METHOD(bool, | 
 |               WriteControlFrame, | 
 |               (const QuicFrame& frame, TransmissionType type), | 
 |               (override)); | 
 | }; | 
 |  | 
 | class QuicSimpleServerSessionTest | 
 |     : public QuicTestWithParam<ParsedQuicVersion> { | 
 |  public: | 
 |   // The function ensures that A) the MAX_STREAMS frames get properly deleted | 
 |   // (since the test uses a 'did we leak memory' check ... if we just lose the | 
 |   // frame, the test fails) and B) returns true (instead of the default, false) | 
 |   // which ensures that the rest of the system thinks that the frame actually | 
 |   // was transmitted. | 
 |   bool ClearMaxStreamsControlFrame(const QuicFrame& frame) { | 
 |     if (frame.type == MAX_STREAMS_FRAME) { | 
 |       DeleteFrame(&const_cast<QuicFrame&>(frame)); | 
 |       return true; | 
 |     } | 
 |     return false; | 
 |   } | 
 |  | 
 |  protected: | 
 |   QuicSimpleServerSessionTest() | 
 |       : crypto_config_(QuicCryptoServerConfig::TESTING, | 
 |                        QuicRandom::GetInstance(), | 
 |                        crypto_test_utils::ProofSourceForTesting(), | 
 |                        KeyExchangeSource::Default()), | 
 |         compressed_certs_cache_( | 
 |             QuicCompressedCertsCache::kQuicCompressedCertsCacheSize) { | 
 |     config_.SetMaxBidirectionalStreamsToSend(kMaxStreamsForTest); | 
 |     QuicConfigPeer::SetReceivedMaxBidirectionalStreams(&config_, | 
 |                                                        kMaxStreamsForTest); | 
 |     config_.SetMaxUnidirectionalStreamsToSend(kMaxStreamsForTest); | 
 |  | 
 |     config_.SetInitialStreamFlowControlWindowToSend( | 
 |         kInitialStreamFlowControlWindowForTest); | 
 |     config_.SetInitialMaxStreamDataBytesIncomingBidirectionalToSend( | 
 |         kInitialStreamFlowControlWindowForTest); | 
 |     config_.SetInitialMaxStreamDataBytesOutgoingBidirectionalToSend( | 
 |         kInitialStreamFlowControlWindowForTest); | 
 |     config_.SetInitialMaxStreamDataBytesUnidirectionalToSend( | 
 |         kInitialStreamFlowControlWindowForTest); | 
 |     config_.SetInitialSessionFlowControlWindowToSend( | 
 |         kInitialSessionFlowControlWindowForTest); | 
 |     if (VersionUsesHttp3(transport_version())) { | 
 |       QuicConfigPeer::SetReceivedMaxUnidirectionalStreams( | 
 |           &config_, kMaxStreamsForTest + 3); | 
 |     } else { | 
 |       QuicConfigPeer::SetReceivedMaxUnidirectionalStreams(&config_, | 
 |                                                           kMaxStreamsForTest); | 
 |     } | 
 |  | 
 |     ParsedQuicVersionVector supported_versions = SupportedVersions(version()); | 
 |     connection_ = new StrictMock<MockQuicConnectionWithSendStreamData>( | 
 |         &helper_, &alarm_factory_, Perspective::IS_SERVER, supported_versions); | 
 |     connection_->AdvanceTime(QuicTime::Delta::FromSeconds(1)); | 
 |     connection_->SetEncrypter( | 
 |         ENCRYPTION_FORWARD_SECURE, | 
 |         std::make_unique<NullEncrypter>(connection_->perspective())); | 
 |     session_ = std::make_unique<MockQuicSimpleServerSession>( | 
 |         config_, connection_, &owner_, &stream_helper_, &crypto_config_, | 
 |         &compressed_certs_cache_, &memory_cache_backend_); | 
 |     MockClock clock; | 
 |     handshake_message_ = crypto_config_.AddDefaultConfig( | 
 |         QuicRandom::GetInstance(), &clock, | 
 |         QuicCryptoServerConfig::ConfigOptions()); | 
 |     session_->Initialize(); | 
 |  | 
 |     if (VersionHasIetfQuicFrames(transport_version())) { | 
 |       EXPECT_CALL(*session_, WriteControlFrame(_, _)) | 
 |           .WillRepeatedly(Invoke(&ClearControlFrameWithTransmissionType)); | 
 |     } | 
 |     session_->OnConfigNegotiated(); | 
 |   } | 
 |  | 
 |   QuicStreamId GetNthClientInitiatedBidirectionalId(int n) { | 
 |     return GetNthClientInitiatedBidirectionalStreamId(transport_version(), n); | 
 |   } | 
 |  | 
 |   QuicStreamId GetNthServerInitiatedUnidirectionalId(int n) { | 
 |     return quic::test::GetNthServerInitiatedUnidirectionalStreamId( | 
 |         transport_version(), n); | 
 |   } | 
 |  | 
 |   ParsedQuicVersion version() const { return GetParam(); } | 
 |  | 
 |   QuicTransportVersion transport_version() const { | 
 |     return version().transport_version; | 
 |   } | 
 |  | 
 |   void InjectStopSending(QuicStreamId stream_id, | 
 |                          QuicRstStreamErrorCode rst_stream_code) { | 
 |     // Create and inject a STOP_SENDING frame. In GOOGLE QUIC, receiving a | 
 |     // RST_STREAM frame causes a two-way close. For IETF QUIC, RST_STREAM causes | 
 |     // a one-way close. | 
 |     if (!VersionHasIetfQuicFrames(transport_version())) { | 
 |       // Only needed for version 99/IETF QUIC. | 
 |       return; | 
 |     } | 
 |     EXPECT_CALL(owner_, OnStopSendingReceived(_)).Times(1); | 
 |     QuicStopSendingFrame stop_sending(kInvalidControlFrameId, stream_id, | 
 |                                       rst_stream_code); | 
 |     // Expect the RESET_STREAM that is generated in response to receiving a | 
 |     // STOP_SENDING. | 
 |     EXPECT_CALL(*connection_, OnStreamReset(stream_id, rst_stream_code)); | 
 |     session_->OnStopSendingFrame(stop_sending); | 
 |   } | 
 |  | 
 |   StrictMock<MockQuicSessionVisitor> owner_; | 
 |   StrictMock<MockQuicCryptoServerStreamHelper> stream_helper_; | 
 |   MockQuicConnectionHelper helper_; | 
 |   MockAlarmFactory alarm_factory_; | 
 |   StrictMock<MockQuicConnectionWithSendStreamData>* connection_; | 
 |   QuicConfig config_; | 
 |   QuicCryptoServerConfig crypto_config_; | 
 |   QuicCompressedCertsCache compressed_certs_cache_; | 
 |   QuicMemoryCacheBackend memory_cache_backend_; | 
 |   std::unique_ptr<MockQuicSimpleServerSession> session_; | 
 |   std::unique_ptr<CryptoHandshakeMessage> handshake_message_; | 
 | }; | 
 |  | 
 | INSTANTIATE_TEST_SUITE_P(Tests, | 
 |                          QuicSimpleServerSessionTest, | 
 |                          ::testing::ValuesIn(AllSupportedVersions()), | 
 |                          ::testing::PrintToStringParamName()); | 
 |  | 
 | TEST_P(QuicSimpleServerSessionTest, CloseStreamDueToReset) { | 
 |   // Send some data open a stream, then reset it. | 
 |   QuicStreamFrame data1(GetNthClientInitiatedBidirectionalId(0), false, 0, | 
 |                         kStreamData); | 
 |   session_->OnStreamFrame(data1); | 
 |   EXPECT_EQ(1u, QuicSessionPeer::GetNumOpenDynamicStreams(session_.get())); | 
 |  | 
 |   // Receive a reset (and send a RST in response). | 
 |   QuicRstStreamFrame rst1(kInvalidControlFrameId, | 
 |                           GetNthClientInitiatedBidirectionalId(0), | 
 |                           QUIC_ERROR_PROCESSING_STREAM, 0); | 
 |   EXPECT_CALL(owner_, OnRstStreamReceived(_)).Times(1); | 
 |   EXPECT_CALL(*session_, WriteControlFrame(_, _)); | 
 |  | 
 |   if (!VersionHasIetfQuicFrames(transport_version())) { | 
 |     // For version 99, this is covered in InjectStopSending() | 
 |     EXPECT_CALL(*connection_, | 
 |                 OnStreamReset(GetNthClientInitiatedBidirectionalId(0), | 
 |                               QUIC_RST_ACKNOWLEDGEMENT)); | 
 |   } | 
 |   session_->OnRstStream(rst1); | 
 |   // Create and inject a STOP_SENDING frame. In GOOGLE QUIC, receiving a | 
 |   // RST_STREAM frame causes a two-way close. For IETF QUIC, RST_STREAM causes | 
 |   // a one-way close. | 
 |   InjectStopSending(GetNthClientInitiatedBidirectionalId(0), | 
 |                     QUIC_ERROR_PROCESSING_STREAM); | 
 |   EXPECT_EQ(0u, QuicSessionPeer::GetNumOpenDynamicStreams(session_.get())); | 
 |  | 
 |   // Send the same two bytes of payload in a new packet. | 
 |   session_->OnStreamFrame(data1); | 
 |  | 
 |   // The stream should not be re-opened. | 
 |   EXPECT_EQ(0u, QuicSessionPeer::GetNumOpenDynamicStreams(session_.get())); | 
 |   EXPECT_TRUE(connection_->connected()); | 
 | } | 
 |  | 
 | TEST_P(QuicSimpleServerSessionTest, NeverOpenStreamDueToReset) { | 
 |   // Send a reset (and expect the peer to send a RST in response). | 
 |   QuicRstStreamFrame rst1(kInvalidControlFrameId, | 
 |                           GetNthClientInitiatedBidirectionalId(0), | 
 |                           QUIC_ERROR_PROCESSING_STREAM, 0); | 
 |   EXPECT_CALL(owner_, OnRstStreamReceived(_)).Times(1); | 
 |   if (!VersionHasIetfQuicFrames(transport_version())) { | 
 |     EXPECT_CALL(*session_, WriteControlFrame(_, _)); | 
 |     // For version 99, this is covered in InjectStopSending() | 
 |     EXPECT_CALL(*connection_, | 
 |                 OnStreamReset(GetNthClientInitiatedBidirectionalId(0), | 
 |                               QUIC_RST_ACKNOWLEDGEMENT)); | 
 |   } | 
 |   session_->OnRstStream(rst1); | 
 |   // Create and inject a STOP_SENDING frame. In GOOGLE QUIC, receiving a | 
 |   // RST_STREAM frame causes a two-way close. For IETF QUIC, RST_STREAM causes | 
 |   // a one-way close. | 
 |   InjectStopSending(GetNthClientInitiatedBidirectionalId(0), | 
 |                     QUIC_ERROR_PROCESSING_STREAM); | 
 |  | 
 |   EXPECT_EQ(0u, QuicSessionPeer::GetNumOpenDynamicStreams(session_.get())); | 
 |  | 
 |   QuicStreamFrame data1(GetNthClientInitiatedBidirectionalId(0), false, 0, | 
 |                         kStreamData); | 
 |   session_->OnStreamFrame(data1); | 
 |  | 
 |   // The stream should never be opened, now that the reset is received. | 
 |   EXPECT_EQ(0u, QuicSessionPeer::GetNumOpenDynamicStreams(session_.get())); | 
 |   EXPECT_TRUE(connection_->connected()); | 
 | } | 
 |  | 
 | TEST_P(QuicSimpleServerSessionTest, AcceptClosedStream) { | 
 |   // Send some data to open two streams. | 
 |   QuicStreamFrame frame1(GetNthClientInitiatedBidirectionalId(0), false, 0, | 
 |                          kStreamData); | 
 |   QuicStreamFrame frame2(GetNthClientInitiatedBidirectionalId(1), false, 0, | 
 |                          kStreamData); | 
 |   session_->OnStreamFrame(frame1); | 
 |   session_->OnStreamFrame(frame2); | 
 |   EXPECT_EQ(2u, QuicSessionPeer::GetNumOpenDynamicStreams(session_.get())); | 
 |  | 
 |   // Send a reset (and expect the peer to send a RST in response). | 
 |   QuicRstStreamFrame rst(kInvalidControlFrameId, | 
 |                          GetNthClientInitiatedBidirectionalId(0), | 
 |                          QUIC_ERROR_PROCESSING_STREAM, 0); | 
 |   EXPECT_CALL(owner_, OnRstStreamReceived(_)).Times(1); | 
 |   if (!VersionHasIetfQuicFrames(transport_version())) { | 
 |     EXPECT_CALL(*session_, WriteControlFrame(_, _)); | 
 |     // For version 99, this is covered in InjectStopSending() | 
 |     EXPECT_CALL(*connection_, | 
 |                 OnStreamReset(GetNthClientInitiatedBidirectionalId(0), | 
 |                               QUIC_RST_ACKNOWLEDGEMENT)); | 
 |   } | 
 |   session_->OnRstStream(rst); | 
 |   // Create and inject a STOP_SENDING frame. In GOOGLE QUIC, receiving a | 
 |   // RST_STREAM frame causes a two-way close. For IETF QUIC, RST_STREAM causes | 
 |   // a one-way close. | 
 |   InjectStopSending(GetNthClientInitiatedBidirectionalId(0), | 
 |                     QUIC_ERROR_PROCESSING_STREAM); | 
 |  | 
 |   // If we were tracking, we'd probably want to reject this because it's data | 
 |   // past the reset point of stream 3.  As it's a closed stream we just drop the | 
 |   // data on the floor, but accept the packet because it has data for stream 5. | 
 |   QuicStreamFrame frame3(GetNthClientInitiatedBidirectionalId(0), false, 2, | 
 |                          kStreamData); | 
 |   QuicStreamFrame frame4(GetNthClientInitiatedBidirectionalId(1), false, 2, | 
 |                          kStreamData); | 
 |   session_->OnStreamFrame(frame3); | 
 |   session_->OnStreamFrame(frame4); | 
 |   // The stream should never be opened, now that the reset is received. | 
 |   EXPECT_EQ(1u, QuicSessionPeer::GetNumOpenDynamicStreams(session_.get())); | 
 |   EXPECT_TRUE(connection_->connected()); | 
 | } | 
 |  | 
 | TEST_P(QuicSimpleServerSessionTest, CreateIncomingStreamDisconnected) { | 
 |   // EXPECT_QUIC_BUG tests are expensive so only run one instance of them. | 
 |   if (version() != AllSupportedVersions()[0]) { | 
 |     return; | 
 |   } | 
 |  | 
 |   // Tests that incoming stream creation fails when connection is not connected. | 
 |   size_t initial_num_open_stream = | 
 |       QuicSessionPeer::GetNumOpenDynamicStreams(session_.get()); | 
 |   QuicConnectionPeer::TearDownLocalConnectionState(connection_); | 
 |   EXPECT_QUIC_BUG(QuicSimpleServerSessionPeer::CreateIncomingStream( | 
 |                       session_.get(), GetNthClientInitiatedBidirectionalId(0)), | 
 |                   "ShouldCreateIncomingStream called when disconnected"); | 
 |   EXPECT_EQ(initial_num_open_stream, | 
 |             QuicSessionPeer::GetNumOpenDynamicStreams(session_.get())); | 
 | } | 
 |  | 
 | TEST_P(QuicSimpleServerSessionTest, CreateIncomingStream) { | 
 |   QuicSpdyStream* stream = QuicSimpleServerSessionPeer::CreateIncomingStream( | 
 |       session_.get(), GetNthClientInitiatedBidirectionalId(0)); | 
 |   EXPECT_NE(nullptr, stream); | 
 |   EXPECT_EQ(GetNthClientInitiatedBidirectionalId(0), stream->id()); | 
 | } | 
 |  | 
 | TEST_P(QuicSimpleServerSessionTest, CreateOutgoingDynamicStreamDisconnected) { | 
 |   // EXPECT_QUIC_BUG tests are expensive so only run one instance of them. | 
 |   if (version() != AllSupportedVersions()[0]) { | 
 |     return; | 
 |   } | 
 |  | 
 |   // Tests that outgoing stream creation fails when connection is not connected. | 
 |   size_t initial_num_open_stream = | 
 |       QuicSessionPeer::GetNumOpenDynamicStreams(session_.get()); | 
 |   QuicConnectionPeer::TearDownLocalConnectionState(connection_); | 
 |   EXPECT_QUIC_BUG( | 
 |       QuicSimpleServerSessionPeer::CreateOutgoingUnidirectionalStream( | 
 |           session_.get()), | 
 |       "ShouldCreateOutgoingUnidirectionalStream called when disconnected"); | 
 |  | 
 |   EXPECT_EQ(initial_num_open_stream, | 
 |             QuicSessionPeer::GetNumOpenDynamicStreams(session_.get())); | 
 | } | 
 |  | 
 | TEST_P(QuicSimpleServerSessionTest, CreateOutgoingDynamicStreamUnencrypted) { | 
 |   // EXPECT_QUIC_BUG tests are expensive so only run one instance of them. | 
 |   if (version() != AllSupportedVersions()[0]) { | 
 |     return; | 
 |   } | 
 |  | 
 |   // Tests that outgoing stream creation fails when encryption has not yet been | 
 |   // established. | 
 |   size_t initial_num_open_stream = | 
 |       QuicSessionPeer::GetNumOpenDynamicStreams(session_.get()); | 
 |   EXPECT_QUIC_BUG( | 
 |       QuicSimpleServerSessionPeer::CreateOutgoingUnidirectionalStream( | 
 |           session_.get()), | 
 |       "Encryption not established so no outgoing stream created."); | 
 |   EXPECT_EQ(initial_num_open_stream, | 
 |             QuicSessionPeer::GetNumOpenDynamicStreams(session_.get())); | 
 | } | 
 |  | 
 | TEST_P(QuicSimpleServerSessionTest, CreateOutgoingDynamicStreamUptoLimit) { | 
 |   // Tests that outgoing stream creation should not be affected by existing | 
 |   // incoming stream and vice-versa. But when reaching the limit of max outgoing | 
 |   // stream allowed, creation should fail. | 
 |  | 
 |   // Receive some data to initiate a incoming stream which should not effect | 
 |   // creating outgoing streams. | 
 |   QuicStreamFrame data1(GetNthClientInitiatedBidirectionalId(0), false, 0, | 
 |                         kStreamData); | 
 |   session_->OnStreamFrame(data1); | 
 |   EXPECT_EQ(1u, QuicSessionPeer::GetNumOpenDynamicStreams(session_.get())); | 
 |   EXPECT_EQ(0u, QuicSessionPeer::GetNumOpenDynamicStreams(session_.get()) - | 
 |                     /*incoming=*/1); | 
 |  | 
 |   if (!VersionUsesHttp3(transport_version())) { | 
 |     session_->UnregisterStreamPriority( | 
 |         QuicUtils::GetHeadersStreamId(transport_version()), | 
 |         /*is_static=*/true); | 
 |   } | 
 |   // Assume encryption already established. | 
 |   QuicSimpleServerSessionPeer::SetCryptoStream(session_.get(), nullptr); | 
 |   QuicCryptoServerStreamBase* crypto_stream = | 
 |       CreateMockCryptoServerStream(&crypto_config_, &compressed_certs_cache_, | 
 |                                    session_.get(), &stream_helper_); | 
 |   QuicSimpleServerSessionPeer::SetCryptoStream(session_.get(), crypto_stream); | 
 |   if (!VersionUsesHttp3(transport_version())) { | 
 |     session_->RegisterStreamPriority( | 
 |         QuicUtils::GetHeadersStreamId(transport_version()), | 
 |         /*is_static=*/true, | 
 |         spdy::SpdyStreamPrecedence(QuicStream::kDefaultPriority)); | 
 |   } | 
 |  | 
 |   // Create push streams till reaching the upper limit of allowed open streams. | 
 |   for (size_t i = 0; i < kMaxStreamsForTest; ++i) { | 
 |     QuicSpdyStream* created_stream = | 
 |         QuicSimpleServerSessionPeer::CreateOutgoingUnidirectionalStream( | 
 |             session_.get()); | 
 |     if (VersionUsesHttp3(transport_version())) { | 
 |       EXPECT_EQ(GetNthServerInitiatedUnidirectionalId(i + 3), | 
 |                 created_stream->id()); | 
 |     } else { | 
 |       EXPECT_EQ(GetNthServerInitiatedUnidirectionalId(i), created_stream->id()); | 
 |     } | 
 |     EXPECT_EQ(i + 1, QuicSessionPeer::GetNumOpenDynamicStreams(session_.get()) - | 
 |                          /*incoming=*/1); | 
 |   } | 
 |  | 
 |   // Continuing creating push stream would fail. | 
 |   EXPECT_EQ(nullptr, | 
 |             QuicSimpleServerSessionPeer::CreateOutgoingUnidirectionalStream( | 
 |                 session_.get())); | 
 |   EXPECT_EQ(kMaxStreamsForTest, | 
 |             QuicSessionPeer::GetNumOpenDynamicStreams(session_.get()) - | 
 |                 /*incoming=*/1); | 
 |  | 
 |   // Create peer initiated stream should have no problem. | 
 |   QuicStreamFrame data2(GetNthClientInitiatedBidirectionalId(1), false, 0, | 
 |                         kStreamData); | 
 |   session_->OnStreamFrame(data2); | 
 |   EXPECT_EQ(2u, QuicSessionPeer::GetNumOpenDynamicStreams(session_.get()) - | 
 |                     /*outcoming=*/kMaxStreamsForTest); | 
 | } | 
 |  | 
 | TEST_P(QuicSimpleServerSessionTest, OnStreamFrameWithEvenStreamId) { | 
 |   QuicStreamFrame frame(GetNthServerInitiatedUnidirectionalId(0), false, 0, | 
 |                         kStreamData); | 
 |   EXPECT_CALL(*connection_, | 
 |               CloseConnection(QUIC_INVALID_STREAM_ID, | 
 |                               "Client sent data on server push stream", _)); | 
 |   session_->OnStreamFrame(frame); | 
 | } | 
 |  | 
 | // Tests that calling GetOrCreateStream() on an outgoing stream not promised yet | 
 | // should result close connection. | 
 | TEST_P(QuicSimpleServerSessionTest, GetEvenIncomingError) { | 
 |   const size_t initial_num_open_stream = | 
 |       QuicSessionPeer::GetNumOpenDynamicStreams(session_.get()); | 
 |   const QuicErrorCode expected_error = VersionUsesHttp3(transport_version()) | 
 |                                            ? QUIC_HTTP_STREAM_WRONG_DIRECTION | 
 |                                            : QUIC_INVALID_STREAM_ID; | 
 |   EXPECT_CALL(*connection_, CloseConnection(expected_error, | 
 |                                             "Data for nonexistent stream", _)); | 
 |   EXPECT_EQ(nullptr, | 
 |             QuicSessionPeer::GetOrCreateStream( | 
 |                 session_.get(), GetNthServerInitiatedUnidirectionalId(3))); | 
 |   EXPECT_EQ(initial_num_open_stream, | 
 |             QuicSessionPeer::GetNumOpenDynamicStreams(session_.get())); | 
 | } | 
 |  | 
 | }  // namespace | 
 | }  // namespace test | 
 | }  // namespace quic |