WebSocketChannel implementation

net/websockets/websocket_channel_test.cc

+// 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 "net/websockets/websocket_channel.h"
+
+#include <iostream>
+#include <string>
+#include <vector>
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "base/callback.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/scoped_vector.h"
+#include "base/message_loop/message_loop.h"
+#include "base/strings/string_piece.h"
+#include "googleurl/src/gurl.h"
+#include "net/base/net_errors.h"
+#include "net/url_request/url_request_context.h"
+#include "net/websockets/websocket_errors.h"
+#include "net/websockets/websocket_event_interface.h"
+#include "net/websockets/websocket_mux.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace net {
+
+// Printing helpers to allow GoogleMock to print frame chunks. These are
+// explicitly designed to look like the static initialisation format we use in
+// these tests. Static to reduce the risk of linker clashes.
+
+static std::ostream& operator<<(std::ostream& os,
+                                const WebSocketFrameHeader& header) {
+  return os << "{" << (header.final ? "FINAL_FRAME" : "NOT_FINAL_FRAME") << ", "
+            << header.opcode << ", "
+            << (header.masked ? "MASKED" : "NOT_MASKED") << ", "
+            << header.payload_length << "}";
+}
+
+static std::ostream& operator<<(std::ostream& os,
+                                const WebSocketFrameChunk& chunk) {
+  os << "{";
+  if (chunk.header) {
+    os << *chunk.header;
+  } else {
+    os << "{NO_HEADER}";
+  }
+  return os << ", " << (chunk.final_chunk ? "FINAL_CHUNK" : "NOT_FINAL_CHUNK")
+            << ", \"" << base::StringPiece(chunk.data->data(),
+                                           chunk.data->size()) << "\"}";
+}
+
+namespace {
+
+using ::testing::AnyNumber;
+using ::testing::Field;
+using ::testing::InSequence;
+using ::testing::MockFunction;
+using ::testing::Pointee;
+using ::testing::Return;
+using ::testing::_;
+
+// This mock is for testing expectations about how the EventInterface is used.
+class MockWebSocketEventInterface : public WebSocketEventInterface {
+ public:
+  MOCK_METHOD2(OnAddChannelResponse, void(bool, const std::string&));
+  MOCK_METHOD3(OnDataFrame,
+               void(bool, WebSocketMessageType, const std::vector<char>&));
+  MOCK_METHOD1(OnFlowControl, void(int64));
+  MOCK_METHOD2(OnDropChannel, void(uint16, const std::string&));
+};
+
+// This fake EventInterface is for tests which need a WebSocketEventInterface
+// implementation but are not verifying how it is used.
+class FakeWebSocketEventInterface : public WebSocketEventInterface {
+  virtual void OnAddChannelResponse(bool fail,
+                                    const std::string& selected_protocol)
+      OVERRIDE {}
+  virtual void OnDataFrame(bool fin,
+                           WebSocketMessageType type,
+                           const std::vector<char>& data) OVERRIDE {}
+  virtual void OnFlowControl(int64 quota) OVERRIDE {}
+  virtual void OnDropChannel(uint16 code, const std::string& reason)
+      OVERRIDE {}
+};
+
+// This fake WebSocketStream is for tests that require a WebSocketStream but are
+// not testing the way it is used. It has minimal functionality to return
+// the |protocol| and |extensions| that it was constructed with.
+class FakeWebSocketStream : public WebSocketStream {
+ public:
+  // Constructs with empty protocol and extensions.
+  FakeWebSocketStream() : WebSocketStream(), protocol_(), extensions_() {}
+
+  // Constructs with specified protocol and extensions.
+  FakeWebSocketStream(const std::string& protocol,
+                      const std::string& extensions)
+      : WebSocketStream(), protocol_(protocol), extensions_(extensions) {}
+
+  virtual int SendHandshakeRequest(const GURL& url,
+                                   const HttpRequestHeaders& headers,
+                                   HttpResponseInfo* response_info,
+                                   const CompletionCallback& callback)
+      OVERRIDE {
+    return ERR_IO_PENDING;
+  }
+
+  virtual int ReadHandshakeResponse(const CompletionCallback& callback)
+      OVERRIDE {
+    return ERR_IO_PENDING;
+  }
+
+  virtual int ReadFrames(ScopedVector<WebSocketFrameChunk>* frame_chunks,
+                         const CompletionCallback& callback) OVERRIDE {
+    return ERR_IO_PENDING;
+  }
+
+  virtual int WriteFrames(ScopedVector<WebSocketFrameChunk>* frame_chunks,
+                          const CompletionCallback& callback) OVERRIDE {
+    return ERR_IO_PENDING;
+  }
+
+  virtual void Close() OVERRIDE {}
+
+  // Returns the string passed to the constructor.
+  virtual std::string GetSubProtocol() const OVERRIDE { return protocol_; }
+
+  // Returns the string passed to the constructor.
+  virtual std::string GetExtensions() const OVERRIDE { return extensions_; }
+
+ private:
+  // The string to return from GetSubProtocol().
+  std::string protocol_;
+
+  // The string to return from GetExtensions().
+  std::string extensions_;
+};
+
+// To make the static initialisers easier to read, we use enums rather than
+// bools.
+
+// NO_HEADER means there shouldn't be a header included in the generated
+// WebSocketFrameChunk. The static initialiser always has a header, but we can
+// avoid specifying the rest of the fields.
+enum IsFinal {
+  NO_HEADER,
+  NOT_FINAL_FRAME,
+  FINAL_FRAME
+};
+
+enum IsMasked {
+  NOT_MASKED,
+  MASKED
+};
+
+enum IsFinalChunk {
+  NOT_FINAL_CHUNK,
+  FINAL_CHUNK
+};
+
+// This is used to initialise a WebSocketFrameChunk but is statically
+// initialisable.
+struct InitFrameChunk {
+  struct FrameHeader {
+    IsFinal final;
+    // Reserved fields omitted for now. Add them if you need them.
+    WebSocketFrameHeader::OpCode opcode;
+    IsMasked masked;
+    uint64 payload_length;
+  };
+  FrameHeader header;
+
+  // Directly equivalent to WebSocketFrameChunk::final_chunk
+  IsFinalChunk final_chunk;
+
+  // Will be used to create the IOBuffer member. Can be NULL for null data.
+  const char* const data;
+};
+
+// Convert a const array of InitFrameChunks to the format used at
+// runtime. Templated on the size of the array to save typing.
+template <size_t N>
+ScopedVector<WebSocketFrameChunk> CreateFrameChunkVector(
+    const InitFrameChunk (&source_chunks)[N]) {
+  ScopedVector<WebSocketFrameChunk> result_chunks;
+  result_chunks.reserve(N);
+  for (size_t i = 0; i < N; ++i) {
+    scoped_ptr<WebSocketFrameChunk> result_chunk(new WebSocketFrameChunk);
+    if (source_chunks[i].header.final != NO_HEADER) {
+      const InitFrameChunk::FrameHeader& source_header =
+          source_chunks[i].header;
+      scoped_ptr<WebSocketFrameHeader> result_header(
+          new WebSocketFrameHeader(source_header.opcode));
+      result_header->final = source_header.final == FINAL_FRAME;
+      result_header->opcode = source_header.opcode;
+      result_header->masked = source_header.masked == MASKED;
+      result_header->payload_length = source_header.payload_length;
+      result_chunk->header.swap(result_header);
+    }
+    result_chunk->final_chunk = source_chunks[i].final_chunk == FINAL_CHUNK;
+    result_chunk->data = new IOBufferWithSize(strlen(source_chunks[i].data));

[tyoshino (SeeGerritForStatus), 2013/07/03 07:27:00]

why not using payload_length? if you want to use null terminated string, please
add a comment about that to L177.

[Adam Rice, 2013/07/03 10:25:26]

I added a comment and tried to clarify the code. I also added support for the
NULL data support which the code claimed to implement but never actually did.

[tyoshino (SeeGerritForStatus), 2013/07/04 12:54:26]

Oh, I didn't understand correctly. Thanks

+    memcpy(result_chunk->data->data(),
+           source_chunks[i].data,
+           strlen(source_chunks[i].data));
+    result_chunks.push_back(result_chunk.release());
+  }
+  return result_chunks.Pass();
+}
+
+// A GoogleMock action which can be used to respond to call to ReadFrames with
+// some frames. Use like ReadFrames(_, _).WillOnce(ReturnChunks(chunks));
+ACTION_P(ReturnChunks, source_chunks) {
+  *arg0 = CreateFrameChunkVector(source_chunks);
+  return OK;
+}
+
+// A FakeWebSocketStream whose ReadFrames() function returns data.
+class ReadableFakeWebSocketStream : public FakeWebSocketStream {
+ public:
+  enum IsSync {
+    SYNC,
+    ASYNC
+  };
+
+  // After constructing the object, call PrepareReadFrames() once for each
+  // time you wish it to return from the test.
+  ReadableFakeWebSocketStream()
+      : FakeWebSocketStream(), responses_(), index_(0) {}
+
+  // Prepares a fake responses. Fake responses will be returned from
+  // ReadFrames() in the same order they were prepared with PrepareReadFrames()
+  // and PrepareReadFramesError(). If |async| is true, then ReadFrames() will

[tyoshino (SeeGerritForStatus), 2013/07/03 07:27:00]

true -> ASYNC

[Adam Rice, 2013/07/03 10:25:26]

Sorry. As you probably guessed, I changed the type from a bool when I realised I
couldn't understand the tests.

+  // return ERR_IO_PENDING and the callback will be scheduled to run on the
+  // message loop. This requires the test case to run the message loop. If
+  // |async| is false, the response will be returned synchronously. |error| is

[tyoshino (SeeGerritForStatus), 2013/07/03 07:27:00]

false -> SYNC

[Adam Rice, 2013/07/03 10:25:26]

Done.

+  // returned directly from ReadFrames() in the synchronous case, or passed to
+  // the callback in the asynchronous case. |chunks| will be converted to a
+  // ScopedVector<WebSocketFrameChunks> and copied to the pointer that was
+  // passed to ReadFrames().
+  template <size_t N>
+  void PrepareReadFrames(IsSync async,
+                         int error,
+                         const InitFrameChunk (&chunks)[N]) {
+    responses_.push_back(
+        new Response(async, error, CreateFrameChunkVector(chunks)));
+  }
+
+  // Prepares a fake error response (ie. there is no data).
+  void PrepareReadFramesError(IsSync async, int error) {
+    responses_.push_back(
+        new Response(async, error, ScopedVector<WebSocketFrameChunk>()));
+  }
+
+  virtual int ReadFrames(ScopedVector<WebSocketFrameChunk>* frame_chunks,
+                         const CompletionCallback& callback) OVERRIDE {
+    if (index_ >= responses_.size()) {
+      return ERR_IO_PENDING;
+    }
+    if (responses_[index_]->async == ASYNC) {
+      base::MessageLoop::current()->PostTask(
+          FROM_HERE,
+          base::Bind(&ReadableFakeWebSocketStream::DoCallback,
+                     base::Unretained(this),
+                     frame_chunks,
+                     callback));
+      return ERR_IO_PENDING;
+    } else {
+      frame_chunks->swap(responses_[index_]->chunks);
+      return responses_[index_++]->error;
+    }
+  }
+
+ private:
+  void DoCallback(ScopedVector<WebSocketFrameChunk>* frame_chunks,
+                  const CompletionCallback& callback) {
+    frame_chunks->swap(responses_[index_]->chunks);
+    callback.Run(responses_[index_++]->error);
+    return;
+  }
+
+  struct Response {
+    Response(IsSync async, int error, ScopedVector<WebSocketFrameChunk> chunks)
+        : async(async), error(error), chunks(chunks.Pass()) {}
+
+    IsSync async;
+    int error;
+    ScopedVector<WebSocketFrameChunk> chunks;
+
+   private:
+    // Bad things will happen if we attempt to copy or assign "chunks".
+    DISALLOW_COPY_AND_ASSIGN(Response);
+  };
+  ScopedVector<Response> responses_;
+  size_t index_;
+};
+
+// A FakeWebSocketStream where writes always complete successfully and
+// synchronously.
+class WriteableFakeWebSocketStream : public FakeWebSocketStream {
+ public:
+  virtual int WriteFrames(ScopedVector<WebSocketFrameChunk>* frame_chunks,
+                          const CompletionCallback& callback) OVERRIDE {
+    return OK;
+  }
+};
+
+// A FakeWebSocketStream where writes always fail.
+class UnWriteableFakeWebSocketStream : public FakeWebSocketStream {
+ public:
+  virtual int WriteFrames(ScopedVector<WebSocketFrameChunk>* frame_chunks,
+                          const CompletionCallback& callback) OVERRIDE {
+    return ERR_CONNECTION_RESET;
+  }
+};
+
+// A FakeWebSocketStream which echoes any frames written back. It unset the
+// "masked" header bit, but makes no other checks for validity. Tests using this
+// must run the MessageLoop to receive the callback.

[tyoshino (SeeGerritForStatus), 2013/07/03 07:27:00]

comment that ReadFrames never completes unless some WriteFrames occurs after
ReadFrames call.

[Adam Rice, 2013/07/03 10:25:26]

Done.

+class EchoeyFakeWebSocketStream : public FakeWebSocketStream {
+ public:
+  EchoeyFakeWebSocketStream()
+      : stored_frame_chunks_(), read_callback_(), read_frame_chunks_(NULL) {}

[tyoshino (SeeGerritForStatus), 2013/07/03 07:27:00]

remove unnecessary initializers?

[Adam Rice, 2013/07/03 10:25:26]

Done.

+
+  virtual int WriteFrames(ScopedVector<WebSocketFrameChunk>* frame_chunks,
+                          const CompletionCallback& callback) OVERRIDE {
+    // Users of WebSocketStream will not expect the ReadFrames() callback to be
+    // called from within WriteFrames(), so post it to the message loop instead.
+    stored_frame_chunks_.insert(
+        stored_frame_chunks_.end(), frame_chunks->begin(), frame_chunks->end());
+    frame_chunks->weak_clear();
+    base::MessageLoop::current()->PostTask(
+        FROM_HERE,
+        base::Bind(&EchoeyFakeWebSocketStream::DoCallback,
+                   base::Unretained(this)));
+    return OK;
+  }
+
+  virtual int ReadFrames(ScopedVector<WebSocketFrameChunk>* frame_chunks,
+                         const CompletionCallback& callback) OVERRIDE {
+    read_callback_ = callback;
+    read_frame_chunks_ = frame_chunks;
+    return ERR_IO_PENDING;
+  }
+
+ private:
+  void DoCallback() {
+    if (!stored_frame_chunks_.empty()) {
+      MoveFrameChunks(read_frame_chunks_);
+      read_frame_chunks_ = NULL;
+      read_callback_.Run(OK);
+      read_callback_.Reset();
+    }
+  }
+
+  void MoveFrameChunks(ScopedVector<WebSocketFrameChunk>* to) {

[tyoshino (SeeGerritForStatus), 2013/07/03 07:27:00]

MoveStoredFrameChunks

comment that masked is unset.

[Adam Rice, 2013/07/03 10:25:26]

Done.

+    to->assign(stored_frame_chunks_.begin(), stored_frame_chunks_.end());
+    for (ScopedVector<WebSocketFrameChunk>::iterator it = to->begin();
+         it != to->end();
+         ++it) {
+      if ((*it)->header && ((*it)->header->masked)) {
+        (*it)->header->masked = false;
+      }
+    }
+    stored_frame_chunks_.weak_clear();
+  }
+
+  ScopedVector<WebSocketFrameChunk> stored_frame_chunks_;
+  CompletionCallback read_callback_;
+  // Owned by the caller of ReadFrames().
+  ScopedVector<WebSocketFrameChunk>* read_frame_chunks_;
+};
+
+// This mock is for verifying that WebSocket protocol semantics are obeyed (to
+// the extent that they are implemented in WebSocketCommon).
+class MockWebSocketStream : public WebSocketStream {
+ public:
+  MOCK_METHOD2(ReadFrames,
+               int(ScopedVector<WebSocketFrameChunk>* frame_chunks,
+                   const CompletionCallback& callback));
+  MOCK_METHOD2(WriteFrames,
+               int(ScopedVector<WebSocketFrameChunk>* frame_chunks,
+                   const CompletionCallback& callback));
+  MOCK_METHOD0(Close, void());
+  MOCK_CONST_METHOD0(GetSubProtocol, std::string());
+  MOCK_CONST_METHOD0(GetExtensions, std::string());
+  MOCK_METHOD0(AsWebSocketStream, WebSocketStream*());
+  MOCK_METHOD4(SendHandshakeRequest,
+               int(const GURL& url,
+                   const HttpRequestHeaders& headers,
+                   HttpResponseInfo* response_info,
+                   const CompletionCallback& callback));
+  MOCK_METHOD1(ReadHandshakeResponse, int(const CompletionCallback& callback));
+};
+
+struct ArgumentCopyingWebSocketFactory {
+  scoped_ptr<WebSocketStreamRequest> Factory(
+      const GURL& socket_url,
+      const std::vector<std::string>& requested_subprotocols,
+      const GURL& origin,
+      URLRequestContext* url_request_context,
+      const BoundNetLog& net_log,
+      scoped_ptr<WebSocketStream::ConnectDelegate> connect_delegate) {
+    this->socket_url = socket_url;
+    this->requested_subprotocols = requested_subprotocols;
+    this->origin = origin;
+    this->url_request_context = url_request_context;
+    this->net_log = net_log;
+    this->connect_delegate = connect_delegate.Pass();
+    return make_scoped_ptr(new WebSocketStreamRequest);
+  }
+
+  GURL socket_url;
+  GURL origin;
+  std::vector<std::string> requested_subprotocols;
+  URLRequestContext* url_request_context;
+  BoundNetLog net_log;
+  scoped_ptr<WebSocketStream::ConnectDelegate> connect_delegate;
+};
+
+// Converts a std::string to a std::vector<char>. For test purposes, it is
+// convenient to be able to specify data as a string, but the
+// WebSocketEventInterface requires the vector<char> type.
+std::vector<char> AsVector(const std::string& s) {
+  return std::vector<char>(s.begin(), s.end());
+}
+
+// Base class for WebSocketChannelTests.
+class WebSocketChannelTest : public ::testing::Test {
+ protected:
+  WebSocketChannelTest()
+      : data_(), channel_(), stream_(new FakeWebSocketStream) {}
+
+  // Creates a new WebSocketChannel and connects it, using the settings stored
+  // in |data_|.
+  void CreateChannelAndConnect() {
+    channel_.reset(new WebSocketChannel(data_.url, EventInterface()));
+    channel_->SendAddChannelRequestWithFactory(
+        data_.requested_subprotocols,
+        data_.origin,
+        &data_.url_request_context,
+        base::Bind(&ArgumentCopyingWebSocketFactory::Factory,
+                   base::Unretained(&data_.factory)));
+  }
+
+  // Same as CreateChannelAndConnect(), but calls the on_success callback as
+  // well. This method is virtual so that WebSocketChannelStreamTest can also
+  // set the stream.
+  virtual void CreateChannelAndConnectSuccessfully() {
+    CreateChannelAndConnect();
+    data_.factory.connect_delegate->OnSuccess(stream_.Pass());
+  }
+
+  // Returns a WebSocketEventInterface to be passed to the WebSocketChannel.
+  // This implementation returns a newly-created fake. Subclasses may return a
+  // mock instead.
+  virtual scoped_ptr<WebSocketEventInterface> EventInterface() {

[tyoshino (SeeGerritForStatus), 2013/07/03 07:27:00]

CreateEventInterface?

WebSocketChannelEventInterfaceTest returns non null value only once. Is this
intentional?

[Adam Rice, 2013/07/03 10:25:26]

Not exactly intentional, but none of the test cases need more than one mock. I
have documented the behaviour.

+    return scoped_ptr<WebSocketEventInterface>(new FakeWebSocketEventInterface);
+  }
+
+  // Writing scoped_ptr<Base> base = derived_scoped_ptr.Pass() doesn't seem to
+  // work (bug?). This function works around that and simplifies initialising

[tyoshino (SeeGerritForStatus), 2013/07/03 07:27:00]

does PassAs<WebSocketStream> work?

[Adam Rice, 2013/07/03 10:25:26]

It does. Thank you.

But I found that the set_stream() method makes my tests look more elegant, so I
kept it.

+  // stream_ from a subclass.
+  template <class T>
+  void set_stream(scoped_ptr<T> stream) {
+    stream_.reset(stream.release());
+  }
+
+  // A struct containing the data that will be used to connect the channel.
+  struct ConnectData {
+    // URL to (pretend to) connect to.
+    GURL url;
+    // Origin of the request
+    GURL origin;
+    // Requested protocols for the request.
+    std::vector<std::string> requested_subprotocols;
+    // URLRequestContext object.
+    URLRequestContext url_request_context;
+    // A fake WebSocketFactory that just records its arguments.
+    ArgumentCopyingWebSocketFactory factory;
+  };
+  ConnectData data_;
+
+  // The channel we are testing. Not initialised until SetChannel() is called.
+  scoped_ptr<WebSocketChannel> channel_;
+
+  // A mock or fake stream for tests that need one.
+  scoped_ptr<WebSocketStream> stream_;
+};
+
+// Base class for tests which verify that EventInterface methods are called
+// appropriately.
+class WebSocketChannelEventInterfaceTest : public WebSocketChannelTest {
+ protected:
+  WebSocketChannelEventInterfaceTest()
+      : WebSocketChannelTest(),
+        event_interface_(new MockWebSocketEventInterface) {}
+
+  virtual scoped_ptr<WebSocketEventInterface> EventInterface() OVERRIDE {
+    return scoped_ptr<WebSocketEventInterface>(event_interface_.release());
+  }
+
+  scoped_ptr<MockWebSocketEventInterface> event_interface_;
+};
+
+// Base class for tests which verify that WebSocketStream methods are called
+// appropriately by using a MockWebSocketStream.
+class WebSocketChannelStreamTest : public WebSocketChannelTest {
+ protected:
+  WebSocketChannelStreamTest()
+      : WebSocketChannelTest(), mock_(new MockWebSocketStream) {}
+
+  virtual void CreateChannelAndConnectSuccessfully() OVERRIDE {
+    set_stream(mock_.Pass());
+    WebSocketChannelTest::CreateChannelAndConnectSuccessfully();
+  }
+
+  scoped_ptr<MockWebSocketStream> mock_;

[tyoshino (SeeGerritForStatus), 2013/07/03 07:27:00]

mock_stream_

[Adam Rice, 2013/07/03 10:25:26]

Done.

+};
+
+// Simple test that everything that should be passed to the factory function is
+// passed to the factory function.
+TEST_F(WebSocketChannelTest, EverythingIsPassedToTheFactoryFunction) {
+  data_.url = GURL("ws://example.com/test");
+  data_.origin = GURL("http://example.com/test");
+  data_.requested_subprotocols.push_back("Sinbad");
+
+  CreateChannelAndConnect();
+
+  EXPECT_EQ(data_.url, data_.factory.socket_url);
+  EXPECT_EQ(data_.origin, data_.factory.origin);
+  EXPECT_EQ(data_.requested_subprotocols, data_.factory.requested_subprotocols);
+  EXPECT_EQ(&data_.url_request_context, data_.factory.url_request_context);
+}
+
+TEST_F(WebSocketChannelEventInterfaceTest, ConnectSuccessReported) {
+  // false means success.
+  EXPECT_CALL(*event_interface_, OnAddChannelResponse(false, ""));
+  // OnFlowControl is always called immediately after connect to provide initial
+  // quota to the renderer.
+  EXPECT_CALL(*event_interface_, OnFlowControl(_));
+
+  CreateChannelAndConnect();
+
+  data_.factory.connect_delegate->OnSuccess(stream_.Pass());
+}
+
+TEST_F(WebSocketChannelEventInterfaceTest, ConnectFailureReported) {
+  // true means failure.
+  EXPECT_CALL(*event_interface_, OnAddChannelResponse(true, ""));
+
+  CreateChannelAndConnect();
+
+  data_.factory.connect_delegate->OnFailure(kWebSocketErrorNoStatusReceived);
+}
+
+TEST_F(WebSocketChannelEventInterfaceTest, ProtocolPassed) {
+  EXPECT_CALL(*event_interface_, OnAddChannelResponse(false, "Bob"));
+  EXPECT_CALL(*event_interface_, OnFlowControl(_));
+
+  CreateChannelAndConnect();
+
+  data_.factory.connect_delegate->OnSuccess(
+      scoped_ptr<WebSocketStream>(new FakeWebSocketStream("Bob", "")));
+}
+
+// The first frames from the server can arrive together with the handshake, in
+// which case they will be available as soon as ReadFrames() is called the first
+// time.
+TEST_F(WebSocketChannelEventInterfaceTest, DataLeftFromHandshake) {
+  scoped_ptr<ReadableFakeWebSocketStream> stream(
+      new ReadableFakeWebSocketStream);
+  static const InitFrameChunk chunks[] = {
+    {{FINAL_FRAME, WebSocketFrameHeader::kOpCodeText, NOT_MASKED, 5},
+     FINAL_CHUNK, "HELLO"},
+  };
+  stream->PrepareReadFrames(ReadableFakeWebSocketStream::SYNC, OK, chunks);
+  set_stream(stream.Pass());
+  {
+    InSequence s;
+    EXPECT_CALL(*event_interface_, OnAddChannelResponse(false, _));
+    EXPECT_CALL(*event_interface_, OnFlowControl(_));
+    EXPECT_CALL(
+        *event_interface_,
+        OnDataFrame(
+            true, WebSocketFrameHeader::kOpCodeText, AsVector("HELLO")));
+  }
+
+  CreateChannelAndConnectSuccessfully();
+}
+
+// A remote server could accept the handshake, but then immediately send a
+// close frame.
+TEST_F(WebSocketChannelEventInterfaceTest, CloseAfterHandshake) {
+  scoped_ptr<ReadableFakeWebSocketStream> stream(
+      new ReadableFakeWebSocketStream);
+  static const InitFrameChunk chunks[] = {
+    {{FINAL_FRAME, WebSocketFrameHeader::kOpCodeClose, NOT_MASKED, 23},
+     FINAL_CHUNK, "\x03\xf3Internal Server Error"},
+  };
+  stream->PrepareReadFrames(ReadableFakeWebSocketStream::SYNC, OK, chunks);
+  set_stream(stream.Pass());
+  {
+    InSequence s;
+    EXPECT_CALL(*event_interface_, OnAddChannelResponse(false, _));
+    EXPECT_CALL(*event_interface_, OnFlowControl(_));
+    EXPECT_CALL(*event_interface_,
+                OnDropChannel(kWebSocketErrorInternalServerError,
+                              "Internal Server Error"));
+  }
+
+  CreateChannelAndConnectSuccessfully();
+}
+
+// A remote server could close the connection immediately after sending the
+// handshake response (most likely a bug in the server).
+TEST_F(WebSocketChannelEventInterfaceTest, ConnectionCloseAfterHandshake) {
+  scoped_ptr<ReadableFakeWebSocketStream> stream(
+      new ReadableFakeWebSocketStream);
+  stream->PrepareReadFramesError(ReadableFakeWebSocketStream::SYNC,
+                                 ERR_CONNECTION_CLOSED);
+  set_stream(stream.Pass());
+  {
+    InSequence s;
+    EXPECT_CALL(*event_interface_, OnAddChannelResponse(false, _));
+    EXPECT_CALL(*event_interface_, OnFlowControl(_));
+    EXPECT_CALL(
+        *event_interface_,
+        OnDropChannel(kWebSocketErrorAbnormalClosure, "Abnormal Closure"));
+  }
+
+  CreateChannelAndConnectSuccessfully();
+}
+
+TEST_F(WebSocketChannelEventInterfaceTest, NormalAsyncRead) {
+  scoped_ptr<ReadableFakeWebSocketStream> stream(
+      new ReadableFakeWebSocketStream);
+  static const InitFrameChunk chunks[] = {
+    {{FINAL_FRAME, WebSocketFrameHeader::kOpCodeText, NOT_MASKED, 5},
+     FINAL_CHUNK, "HELLO"},
+  };
+  // We use this checkpoint object to verify that the callback isn't called
+  // until we expect it to be.
+  MockFunction<void(int)> checkpoint;
+  stream->PrepareReadFrames(ReadableFakeWebSocketStream::ASYNC, OK, chunks);
+  set_stream(stream.Pass());
+  {
+    InSequence s;
+    EXPECT_CALL(*event_interface_, OnAddChannelResponse(false, _));
+    EXPECT_CALL(*event_interface_, OnFlowControl(_));
+    EXPECT_CALL(checkpoint, Call(1));
+    EXPECT_CALL(
+        *event_interface_,
+        OnDataFrame(
+            true, WebSocketFrameHeader::kOpCodeText, AsVector("HELLO")));
+    EXPECT_CALL(checkpoint, Call(2));
+  }
+
+  CreateChannelAndConnectSuccessfully();
+  checkpoint.Call(1);
+  base::MessageLoop::current()->RunUntilIdle();
+  checkpoint.Call(2);
+}
+
+// Extra data can arrive while a read is being processed, resulting in the next
+// read completing synchronously.
+TEST_F(WebSocketChannelEventInterfaceTest, AsyncThenSyncRead) {
+  scoped_ptr<ReadableFakeWebSocketStream> stream(
+      new ReadableFakeWebSocketStream);
+  static const InitFrameChunk chunks1[] = {
+    {{FINAL_FRAME, WebSocketFrameHeader::kOpCodeText, NOT_MASKED, 5},
+     FINAL_CHUNK, "HELLO"},
+  };
+  static const InitFrameChunk chunks2[] = {
+    {{FINAL_FRAME, WebSocketFrameHeader::kOpCodeText, NOT_MASKED, 5},
+     FINAL_CHUNK, "WORLD"},
+  };
+  stream->PrepareReadFrames(ReadableFakeWebSocketStream::ASYNC, OK, chunks1);
+  stream->PrepareReadFrames(ReadableFakeWebSocketStream::SYNC, OK, chunks2);
+  set_stream(stream.Pass());
+  {
+    InSequence s;
+    EXPECT_CALL(*event_interface_, OnAddChannelResponse(false, _));
+    EXPECT_CALL(*event_interface_, OnFlowControl(_));
+    EXPECT_CALL(
+        *event_interface_,
+        OnDataFrame(
+            true, WebSocketFrameHeader::kOpCodeText, AsVector("HELLO")));
+    EXPECT_CALL(
+        *event_interface_,
+        OnDataFrame(
+            true, WebSocketFrameHeader::kOpCodeText, AsVector("WORLD")));
+  }
+
+  CreateChannelAndConnectSuccessfully();
+  base::MessageLoop::current()->RunUntilIdle();
+}
+
+// Data frames that arrive in fragments are turned into individual frames
+TEST_F(WebSocketChannelEventInterfaceTest, FragmentedFrames) {
+  scoped_ptr<ReadableFakeWebSocketStream> stream(
+      new ReadableFakeWebSocketStream);
+  // Here we have one message split into 3 frames which arrive in 3 chunks. The
+  // first frame is entirely in the first chunk, the second frame is split
+  // across all the chunks, and the final frame is entirely in the final
+  // chunk. This should be delivered as 5 frames.
+  static const InitFrameChunk chunks1[] = {
+    {{NOT_FINAL_FRAME, WebSocketFrameHeader::kOpCodeText, NOT_MASKED, 5},
+     FINAL_CHUNK, "THREE"},
+    {{NOT_FINAL_FRAME, WebSocketFrameHeader::kOpCodeContinuation, NOT_MASKED,
+      7},
+     NOT_FINAL_CHUNK, " "},
+  };
+  static const InitFrameChunk chunks2[] = {{{NO_HEADER}, NOT_FINAL_CHUNK,
+                                            "SMALL"}};
+  static const InitFrameChunk chunks3[] = {
+    {{NO_HEADER}, FINAL_CHUNK, " "},
+    {{FINAL_FRAME, WebSocketFrameHeader::kOpCodeContinuation, NOT_MASKED, 6},
+     FINAL_CHUNK, "FRAMES"},
+  };
+  stream->PrepareReadFrames(ReadableFakeWebSocketStream::ASYNC, OK, chunks1);
+  stream->PrepareReadFrames(ReadableFakeWebSocketStream::ASYNC, OK, chunks2);
+  stream->PrepareReadFrames(ReadableFakeWebSocketStream::ASYNC, OK, chunks3);
+  set_stream(stream.Pass());
+  {
+    InSequence s;
+    EXPECT_CALL(*event_interface_, OnAddChannelResponse(false, _));
+    EXPECT_CALL(*event_interface_, OnFlowControl(_));
+    EXPECT_CALL(
+        *event_interface_,
+        OnDataFrame(
+            false, WebSocketFrameHeader::kOpCodeText, AsVector("THREE")));
+    EXPECT_CALL(
+        *event_interface_,
+        OnDataFrame(
+            false, WebSocketFrameHeader::kOpCodeContinuation, AsVector(" ")));
+    EXPECT_CALL(*event_interface_,
+                OnDataFrame(false,
+                            WebSocketFrameHeader::kOpCodeContinuation,
+                            AsVector("SMALL")));
+    EXPECT_CALL(
+        *event_interface_,
+        OnDataFrame(
+            false, WebSocketFrameHeader::kOpCodeContinuation, AsVector(" ")));
+    EXPECT_CALL(*event_interface_,
+                OnDataFrame(true,
+                            WebSocketFrameHeader::kOpCodeContinuation,
+                            AsVector("FRAMES")));
+  }
+
+  CreateChannelAndConnectSuccessfully();
+  base::MessageLoop::current()->RunUntilIdle();
+}
+
+// In the case when a single-frame message because fragmented, it must be
+// correctly transformed to multiple frames.
+TEST_F(WebSocketChannelEventInterfaceTest, MessageFragmentation) {
+  scoped_ptr<ReadableFakeWebSocketStream> stream(
+      new ReadableFakeWebSocketStream);
+  // Here we have one message split into 3 frames which arrive in 3 chunks. The
+  // first frame is entirely in the first chunk, the second frame is split
+  // across all the chunks, and the final frame is entirely in the final
+  // chunk. This should be delivered as 5 frames.
+  static const InitFrameChunk chunks1[] = {
+    {{FINAL_FRAME, WebSocketFrameHeader::kOpCodeText, NOT_MASKED, 12},
+     NOT_FINAL_CHUNK, "TIME"},
+  };
+  static const InitFrameChunk chunks2[] = {{{NO_HEADER}, NOT_FINAL_CHUNK,
+                                            " FOR "}};
+  static const InitFrameChunk chunks3[] = {{{NO_HEADER}, FINAL_CHUNK, "TEA"}};
+  stream->PrepareReadFrames(ReadableFakeWebSocketStream::ASYNC, OK, chunks1);
+  stream->PrepareReadFrames(ReadableFakeWebSocketStream::ASYNC, OK, chunks2);
+  stream->PrepareReadFrames(ReadableFakeWebSocketStream::ASYNC, OK, chunks3);
+  set_stream(stream.Pass());
+  {
+    InSequence s;
+    EXPECT_CALL(*event_interface_, OnAddChannelResponse(false, _));
+    EXPECT_CALL(*event_interface_, OnFlowControl(_));
+    EXPECT_CALL(
+        *event_interface_,
+        OnDataFrame(
+            false, WebSocketFrameHeader::kOpCodeText, AsVector("TIME")));
+    EXPECT_CALL(*event_interface_,
+                OnDataFrame(false,
+                            WebSocketFrameHeader::kOpCodeContinuation,
+                            AsVector(" FOR ")));
+    EXPECT_CALL(
+        *event_interface_,
+        OnDataFrame(
+            true, WebSocketFrameHeader::kOpCodeContinuation, AsVector("TEA")));
+  }
+
+  CreateChannelAndConnectSuccessfully();
+  base::MessageLoop::current()->RunUntilIdle();
+}
+
+// If a control message is fragmented, it must be re-assembled before being
+// delivered. A control message can only be fragmented at the network level; it
+// is not permitted to be split into multiple frames.
+TEST_F(WebSocketChannelEventInterfaceTest, FragmentedControlMessage) {
+  scoped_ptr<ReadableFakeWebSocketStream> stream(
+      new ReadableFakeWebSocketStream);
+  static const InitFrameChunk chunks1[] = {
+    {{FINAL_FRAME, WebSocketFrameHeader::kOpCodeClose, NOT_MASKED, 7},
+     NOT_FINAL_CHUNK, "\x03\xe8"},
+  };
+  static const InitFrameChunk chunks2[] = {{{NO_HEADER}, NOT_FINAL_CHUNK,
+                                            "Clo"}};
+  static const InitFrameChunk chunks3[] = {{{NO_HEADER}, FINAL_CHUNK, "se"}};
+  stream->PrepareReadFrames(ReadableFakeWebSocketStream::ASYNC, OK, chunks1);
+  stream->PrepareReadFrames(ReadableFakeWebSocketStream::ASYNC, OK, chunks2);
+  stream->PrepareReadFrames(ReadableFakeWebSocketStream::ASYNC, OK, chunks3);
+  set_stream(stream.Pass());
+  {
+    InSequence s;
+    EXPECT_CALL(*event_interface_, OnAddChannelResponse(false, _));
+    EXPECT_CALL(*event_interface_, OnFlowControl(_));
+    EXPECT_CALL(*event_interface_,
+                OnDropChannel(kWebSocketNormalClosure, "Close"));
+  }
+
+  CreateChannelAndConnectSuccessfully();
+  base::MessageLoop::current()->RunUntilIdle();
+}
+
+// Connection closed unexpectedly.
+TEST_F(WebSocketChannelEventInterfaceTest, AsyncAbnormalClosure) {
+  scoped_ptr<ReadableFakeWebSocketStream> stream(
+      new ReadableFakeWebSocketStream);
+  stream->PrepareReadFramesError(ReadableFakeWebSocketStream::ASYNC,
+                                 ERR_CONNECTION_CLOSED);
+  set_stream(stream.Pass());
+  {
+    InSequence s;
+    EXPECT_CALL(*event_interface_, OnAddChannelResponse(false, _));
+    EXPECT_CALL(*event_interface_, OnFlowControl(_));
+    EXPECT_CALL(*event_interface_,
+                OnDropChannel(kWebSocketErrorAbnormalClosure, _));
+  }
+
+  CreateChannelAndConnectSuccessfully();
+  base::MessageLoop::current()->RunUntilIdle();
+}
+
+// Connection reset.
+TEST_F(WebSocketChannelEventInterfaceTest, ConnectionReset) {
+  scoped_ptr<ReadableFakeWebSocketStream> stream(
+      new ReadableFakeWebSocketStream);
+  stream->PrepareReadFramesError(ReadableFakeWebSocketStream::ASYNC,
+                                 ERR_CONNECTION_RESET);
+  set_stream(stream.Pass());
+  {
+    InSequence s;
+    EXPECT_CALL(*event_interface_, OnAddChannelResponse(false, _));
+    EXPECT_CALL(*event_interface_, OnFlowControl(_));
+    EXPECT_CALL(*event_interface_,
+                OnDropChannel(kWebSocketErrorAbnormalClosure, _));
+  }
+
+  CreateChannelAndConnectSuccessfully();
+  base::MessageLoop::current()->RunUntilIdle();
+}
+
+// Connection closed in the middle of a Close message (server bug, etc.)
+TEST_F(WebSocketChannelEventInterfaceTest, ConnectionClosedInMessage) {
+  scoped_ptr<ReadableFakeWebSocketStream> stream(
+      new ReadableFakeWebSocketStream);
+  static const InitFrameChunk chunks[] = {
+    {{FINAL_FRAME, WebSocketFrameHeader::kOpCodeClose, NOT_MASKED, 7},
+     NOT_FINAL_CHUNK, "\x03\xe8"},
+  };
+
+  stream->PrepareReadFrames(ReadableFakeWebSocketStream::ASYNC, OK, chunks);
+  stream->PrepareReadFramesError(ReadableFakeWebSocketStream::ASYNC,
+                                 ERR_CONNECTION_CLOSED);
+  set_stream(stream.Pass());
+  {
+    InSequence s;
+    EXPECT_CALL(*event_interface_, OnAddChannelResponse(false, _));
+    EXPECT_CALL(*event_interface_, OnFlowControl(_));
+    EXPECT_CALL(*event_interface_,
+                OnDropChannel(kWebSocketErrorAbnormalClosure, _));
+  }
+
+  CreateChannelAndConnectSuccessfully();
+  base::MessageLoop::current()->RunUntilIdle();
+}
+
+// RFC6455 5.1 "A client MUST close a connection if it detects a masked frame."
+TEST_F(WebSocketChannelEventInterfaceTest, MaskedFramesAreRejected) {
+  scoped_ptr<ReadableFakeWebSocketStream> stream(
+      new ReadableFakeWebSocketStream);
+  static const InitFrameChunk chunks[] = {
+    {{FINAL_FRAME, WebSocketFrameHeader::kOpCodeText, MASKED, 5}, FINAL_CHUNK,
+     "HELLO"}
+  };
+
+  stream->PrepareReadFrames(ReadableFakeWebSocketStream::ASYNC, OK, chunks);
+  set_stream(stream.Pass());
+  {
+    InSequence s;
+    EXPECT_CALL(*event_interface_, OnAddChannelResponse(false, _));
+    EXPECT_CALL(*event_interface_, OnFlowControl(_));
+    EXPECT_CALL(*event_interface_,
+                OnDropChannel(kWebSocketErrorProtocolError, _));
+  }
+
+  CreateChannelAndConnectSuccessfully();
+  base::MessageLoop::current()->RunUntilIdle();
+}
+
+// RFC6455 5.2 "If an unknown opcode is received, the receiving endpoint MUST
+// _Fail the WebSocket Connection_."
+TEST_F(WebSocketChannelEventInterfaceTest, UnknownOpCodeIsRejected) {
+  scoped_ptr<ReadableFakeWebSocketStream> stream(
+      new ReadableFakeWebSocketStream);
+  static const InitFrameChunk chunks[] = {{{FINAL_FRAME, 4, NOT_MASKED, 5},
+                                           FINAL_CHUNK, "HELLO"}};
+
+  stream->PrepareReadFrames(ReadableFakeWebSocketStream::ASYNC, OK, chunks);
+  set_stream(stream.Pass());
+  {
+    InSequence s;
+    EXPECT_CALL(*event_interface_, OnAddChannelResponse(false, _));
+    EXPECT_CALL(*event_interface_, OnFlowControl(_));
+    EXPECT_CALL(*event_interface_,
+                OnDropChannel(kWebSocketErrorProtocolError, _));
+  }
+
+  CreateChannelAndConnectSuccessfully();
+  base::MessageLoop::current()->RunUntilIdle();
+}
+
+// RFC6455 5.4 "Control frames ... MAY be injected in the middle of a
+// fragmented message."
+TEST_F(WebSocketChannelEventInterfaceTest, ControlFrameInDataMessage) {
+  scoped_ptr<ReadableFakeWebSocketStream> stream(
+      new ReadableFakeWebSocketStream);
+  // We have one message of type Text split into two frames. In the middle is a
+  // control message of type Pong.
+  static const InitFrameChunk chunks1[] = {
+    {{NOT_FINAL_FRAME, WebSocketFrameHeader::kOpCodeText, NOT_MASKED, 6},
+     FINAL_CHUNK, "SPLIT "},
+  };
+  static const InitFrameChunk chunks2[] = {
+    {{FINAL_FRAME, WebSocketFrameHeader::kOpCodePong, NOT_MASKED, 0},
+     FINAL_CHUNK, ""}
+  };
+  static const InitFrameChunk chunks3[] = {
+    {{FINAL_FRAME, WebSocketFrameHeader::kOpCodeContinuation, NOT_MASKED, 7},
+     FINAL_CHUNK, "MESSAGE"}
+  };
+  stream->PrepareReadFrames(ReadableFakeWebSocketStream::ASYNC, OK, chunks1);
+  stream->PrepareReadFrames(ReadableFakeWebSocketStream::ASYNC, OK, chunks2);
+  stream->PrepareReadFrames(ReadableFakeWebSocketStream::ASYNC, OK, chunks3);
+  set_stream(stream.Pass());
+  {
+    InSequence s;
+    EXPECT_CALL(*event_interface_, OnAddChannelResponse(false, _));
+    EXPECT_CALL(*event_interface_, OnFlowControl(_));
+    EXPECT_CALL(
+        *event_interface_,
+        OnDataFrame(
+            false, WebSocketFrameHeader::kOpCodeText, AsVector("SPLIT ")));
+    EXPECT_CALL(*event_interface_,
+                OnDataFrame(true,
+                            WebSocketFrameHeader::kOpCodeContinuation,
+                            AsVector("MESSAGE")));
+  }
+
+  CreateChannelAndConnectSuccessfully();
+  base::MessageLoop::current()->RunUntilIdle();
+}
+
+// If the renderer sends lots of small writes, we don't want to update the quota
+// for each one.
+TEST_F(WebSocketChannelEventInterfaceTest, SmallWriteDoesntUpdateQuota) {
+  set_stream(make_scoped_ptr(new WriteableFakeWebSocketStream));
+  {
+    InSequence s;
+    EXPECT_CALL(*event_interface_, OnAddChannelResponse(false, _));
+    EXPECT_CALL(*event_interface_, OnFlowControl(_));
+  }
+
+  CreateChannelAndConnectSuccessfully();
+  channel_->SendFrame(true, WebSocketFrameHeader::kOpCodeText, AsVector("B"));
+}
+
+// If we send enough to go below send_quota_low_water_mask_ we should get our
+// quota refreshed.
+TEST_F(WebSocketChannelEventInterfaceTest, LargeWriteUpdatesQuota) {
+  set_stream(make_scoped_ptr(new WriteableFakeWebSocketStream));
+  // We use this checkpoint object to verify that the quota update comes after
+  // the write.
+  MockFunction<void(int)> checkpoint;
+  {
+    InSequence s;
+    EXPECT_CALL(*event_interface_, OnAddChannelResponse(false, _));
+    EXPECT_CALL(*event_interface_, OnFlowControl(_));
+    EXPECT_CALL(checkpoint, Call(1));
+    EXPECT_CALL(*event_interface_, OnFlowControl(_));
+    EXPECT_CALL(checkpoint, Call(2));
+  }
+
+  CreateChannelAndConnectSuccessfully();
+  checkpoint.Call(1);
+  // TODO(ricea): If kDefaultSendQuotaHighWaterMark changes, then this value
+  // will need to be updated.
+  channel_->SendFrame(
+      true, WebSocketFrameHeader::kOpCodeText, std::vector<char>(1 << 17, 'B'));
+  checkpoint.Call(2);
+}
+
+// Verify that our quota actually is refreshed when we are told it is.
+TEST_F(WebSocketChannelEventInterfaceTest, QuotaReallyIsRefreshed) {
+  set_stream(make_scoped_ptr(new WriteableFakeWebSocketStream));
+  MockFunction<void(int)> checkpoint;
+  {
+    InSequence s;
+    EXPECT_CALL(*event_interface_, OnAddChannelResponse(false, _));
+    EXPECT_CALL(*event_interface_, OnFlowControl(_));
+    EXPECT_CALL(checkpoint, Call(1));
+    EXPECT_CALL(*event_interface_, OnFlowControl(_));
+    EXPECT_CALL(checkpoint, Call(2));
+    // If quota was not really refreshed, we would get an OnDropChannel()
+    // message.
+    EXPECT_CALL(*event_interface_, OnFlowControl(_));
+    EXPECT_CALL(checkpoint, Call(3));
+  }
+
+  CreateChannelAndConnectSuccessfully();
+  checkpoint.Call(1);
+  // TODO(ricea): If kDefaultSendQuotaLowWaterMark and/or
+  // kDefaultSendQuotaHighWaterMark change, then this value will need to be
+  // updated.
+  channel_->SendFrame(true,
+                      WebSocketFrameHeader::kOpCodeText,
+                      std::vector<char>((1 << 16) + 1, 'D'));
+  checkpoint.Call(2);
+  // We should have received more quota at this point.
+  channel_->SendFrame(true,
+                      WebSocketFrameHeader::kOpCodeText,
+                      std::vector<char>((1 << 16) + 1, 'E'));
+  checkpoint.Call(3);
+}
+
+// If we send more than the available quota then the connection will be closed
+// with an error.
+TEST_F(WebSocketChannelEventInterfaceTest, WriteOverQuotaIsRejected) {
+  set_stream(make_scoped_ptr(new WriteableFakeWebSocketStream));
+  {
+    InSequence s;
+    EXPECT_CALL(*event_interface_, OnAddChannelResponse(false, _));
+    // TODO(ricea): Change this if kDefaultSendQuotaHighWaterMark changes.
+    EXPECT_CALL(*event_interface_, OnFlowControl(1 << 17));
+    EXPECT_CALL(*event_interface_,
+                OnDropChannel(kWebSocketMuxErrorSendQuotaViolation, _));
+  }
+
+  CreateChannelAndConnectSuccessfully();
+  channel_->SendFrame(true,
+                      WebSocketFrameHeader::kOpCodeText,
+                      std::vector<char>((1 << 17) + 1, 'C'));
+}
+
+// If a write fails, the channel is dropped.
+TEST_F(WebSocketChannelEventInterfaceTest, FailedWrite) {
+  set_stream(make_scoped_ptr(new UnWriteableFakeWebSocketStream));
+  MockFunction<void(int)> checkpoint;
+  {
+    InSequence s;
+    EXPECT_CALL(*event_interface_, OnAddChannelResponse(false, _));
+    EXPECT_CALL(*event_interface_, OnFlowControl(_));
+    EXPECT_CALL(checkpoint, Call(1));
+    EXPECT_CALL(*event_interface_,
+                OnDropChannel(kWebSocketErrorAbnormalClosure, _));
+    EXPECT_CALL(checkpoint, Call(2));
+  }
+
+  CreateChannelAndConnectSuccessfully();
+  checkpoint.Call(1);
+
+  channel_->SendFrame(true, WebSocketFrameHeader::kOpCodeText, AsVector("H"));
+  checkpoint.Call(2);
+}
+
+// OnDropChannel() is called exactly once when SendDropChannel() is used.
+TEST_F(WebSocketChannelEventInterfaceTest, SendCloseDropsChannel) {
+  set_stream(make_scoped_ptr(new EchoeyFakeWebSocketStream));
+  {
+    InSequence s;
+    EXPECT_CALL(*event_interface_, OnAddChannelResponse(false, _));
+    EXPECT_CALL(*event_interface_, OnFlowControl(_));
+    EXPECT_CALL(*event_interface_,
+                OnDropChannel(kWebSocketNormalClosure, "Fred"));
+  }
+
+  CreateChannelAndConnectSuccessfully();
+
+  channel_->SendDropChannel(kWebSocketNormalClosure, "Fred");
+  base::MessageLoop::current()->RunUntilIdle();
+}
+
+// RFC6455 5.1 "a client MUST mask all frames that it sends to the server".
+// WebSocketChannel actually only sets the mask bit in the header, it doesn't
+// perform masking itself (not all transports actually use masking).
+TEST_F(WebSocketChannelStreamTest, SentFramesAreMasked) {
+  EXPECT_CALL(*mock_, GetSubProtocol()).Times(AnyNumber());
+  EXPECT_CALL(*mock_, ReadFrames(_, _)).WillOnce(Return(ERR_IO_PENDING));
+  EXPECT_CALL(
+      *mock_,
+      WriteFrames(Pointee(ElementsAre(Pointee(Field(
+                      &WebSocketFrameChunk::header,
+                      Pointee(Field(&WebSocketFrameHeader::masked, true)))))),
+                  _)).WillOnce(Return(ERR_IO_PENDING));
+
+  CreateChannelAndConnectSuccessfully();
+  channel_->SendFrame(
+      true, WebSocketFrameHeader::kOpCodeText, AsVector("NEEDS MASKING"));
+}
+
+}  // namespace
+}  // namespace net