Host extensions

remoting/host/client_session_unittest.cc

Index: remoting/host/client_session_unittest.cc
diff --git a/remoting/host/client_session_unittest.cc b/remoting/host/client_session_unittest.cc
index f28050a9a43fab6da148ac0752f2736c928c3826..d648ba18b30c04d3d41c0d2771e70e82ea9d3f06 100644
--- a/remoting/host/client_session_unittest.cc
+++ b/remoting/host/client_session_unittest.cc
@@ -2,17 +2,24 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include <algorithm>
+#include <string>
+#include <vector>
+
 #include "base/message_loop/message_loop.h"
+#include "base/strings/string_util.h"
 #include "base/test/test_simple_task_runner.h"
 #include "remoting/base/auto_thread_task_runner.h"
 #include "remoting/base/constants.h"
 #include "remoting/host/audio_capturer.h"
 #include "remoting/host/client_session.h"
 #include "remoting/host/desktop_environment.h"
+#include "remoting/host/host_extension.h"
 #include "remoting/host/host_mock_objects.h"
 #include "remoting/host/screen_capturer_fake.h"
 #include "remoting/protocol/protocol_mock_objects.h"
 #include "testing/gmock/include/gmock/gmock-matchers.h"
+#include "testing/gmock_mutant.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
 #include "third_party/webrtc/modules/desktop_capture/desktop_region.h"
@@ -31,9 +38,11 @@ using protocol::SessionConfig;
 using testing::_;
 using testing::AnyNumber;
 using testing::AtMost;
+using testing::CreateFunctor;
 using testing::DeleteArg;
 using testing::DoAll;
 using testing::Expectation;
+using testing::Invoke;
 using testing::Return;
 using testing::ReturnRef;
 using testing::Sequence;
@@ -42,6 +51,8 @@ using testing::StrictMock;
 
 namespace {
 
+const char kDefaultTestCapability[] = "default";
+
 ACTION_P2(InjectClipboardEvent, connection, event) {
   connection->clipboard_stub()->InjectClipboardEvent(event);
 }
@@ -67,8 +78,75 @@ ACTION_P2(DeliverClientMessage, client_session, message) {
   client_session->DeliverClientMessage(message);
 }
 
+ACTION_P2(AddHostCapabilities, client_session, capability) {
+  client_session->AddHostCapabilities(capability);
 }
 
+// Matches a |protocol::Capabilities| argument against a list of capabilities
+// formatted as a space-separated string.
+MATCHER_P(EqCapabilities, expected_capabilities, "") {
+  if (!arg.has_capabilities())
+    return false;
+
+  std::vector<std::string> words_args;
+  std::vector<std::string> words_expected;
+  Tokenize(arg.capabilities(), " ", &words_args);
+  Tokenize(expected_capabilities, " ", &words_expected);
+  std::sort(words_args.begin(), words_args.end());
+  std::sort(words_expected.begin(), words_expected.end());
+  return words_args == words_expected;
+}
+
+// |HostExtension| implementation that can handle an extension message type and
+// provide capabilities.
+class FakeExtension : public HostExtension {
+ public:
+  FakeExtension(const std::string& message_type,
+                const std::string& capabilities);
+  virtual ~FakeExtension();
+
+  virtual std::string GetCapabilities() OVERRIDE;
+  virtual scoped_ptr<HostExtensionSession> CreateExtensionSession(
+      ClientSession* client_session) OVERRIDE;
+
+  bool message_handled() {
+    return message_handled_;
+  }
+
+ private:
+  class FakeExtensionSession : public HostExtensionSession {
+   public:
+    FakeExtensionSession(FakeExtension* extension);
+    virtual ~FakeExtensionSession();
+
+    virtual bool OnExtensionMessage(
+        ClientSession* client_session,
+        const protocol::ExtensionMessage& message) OVERRIDE;
+
+   private:
+    FakeExtension* extension_;
+  };
+
+  std::string message_type_;
+  std::string capabilities_;
+  bool message_handled_;
+};
+
+typedef std::vector<HostExtension*> HostExtensionList;
+
+void CreateExtensionSessions(const HostExtensionList& extensions,
+                             ClientSession* client_session) {
+  for (HostExtensionList::const_iterator extension = extensions.begin();
+       extension != extensions.end(); ++extension) {
+    scoped_ptr<HostExtensionSession> extension_session =
+        (*extension)->CreateExtensionSession(client_session);
+    if (extension_session)
+      client_session->AddExtensionSession(extension_session.Pass());
+  }
+}
+
+}  // namespace
+
 class ClientSessionTest : public testing::Test {
  public:
   ClientSessionTest() : client_jid_("user@domain/rest-of-jid") {}
@@ -100,6 +178,10 @@ class ClientSessionTest : public testing::Test {
   // the input pipe line and starts video capturing.
   void ConnectClientSession();
 
+  // Creates expectations to send an extension message and to disconnect
+  // afterwards.
+  void SetSendMessageAndDisconnectExpectation(const std::string& message_type);
+
   // Invoked when the last reference to the AutoThreadTaskRunner has been
   // released and quits the message loop to finish the test.
   void QuitMainMessageLoop();
@@ -131,6 +213,41 @@ class ClientSessionTest : public testing::Test {
   scoped_ptr<MockDesktopEnvironmentFactory> desktop_environment_factory_;
 };
 
+FakeExtension::FakeExtension(const std::string& message_type,
+                             const std::string& capabilities)
+    : message_type_(message_type),
+      capabilities_(capabilities),
+      message_handled_(false) {
+}
+
+FakeExtension::~FakeExtension() {}
+
+std::string FakeExtension::GetCapabilities() {
+  return capabilities_;
+}
+
+scoped_ptr<HostExtensionSession> FakeExtension::CreateExtensionSession(
+    ClientSession* client_session) {
+  return scoped_ptr<HostExtensionSession>(new FakeExtensionSession(this));
+}
+
+FakeExtension::FakeExtensionSession::FakeExtensionSession(
+    FakeExtension* extension)
+    : extension_(extension) {
+}
+
+FakeExtension::FakeExtensionSession::~FakeExtensionSession() {}
+
+bool FakeExtension::FakeExtensionSession::OnExtensionMessage(
+    ClientSession* client_session,
+    const protocol::ExtensionMessage& message) {
+  if (message.type() == extension_->message_type_) {
+    extension_->message_handled_ = true;
+    return true;
+  }
+  return false;
+}
+
 void ClientSessionTest::SetUp() {
   // Arrange to run |message_loop_| until no components depend on it.
   scoped_refptr<AutoThreadTaskRunner> ui_task_runner = new AutoThreadTaskRunner(
@@ -180,6 +297,11 @@ void ClientSessionTest::SetUp() {
       desktop_environment_factory_.get(),
       base::TimeDelta(),
       NULL));
+
+  // By default, client will report the same capabilities as the host.
+  EXPECT_CALL(client_stub_, SetCapabilities(_))
+      .Times(AtMost(1))
+      .WillOnce(Invoke(client_session_.get(), &ClientSession::SetCapabilities));
 }
 
 void ClientSessionTest::TearDown() {
@@ -211,7 +333,8 @@ DesktopEnvironment* ClientSessionTest::CreateDesktopEnvironment() {
   EXPECT_CALL(*desktop_environment, CreateVideoCapturerPtr())
       .WillOnce(Invoke(this, &ClientSessionTest::CreateVideoCapturer));
   EXPECT_CALL(*desktop_environment, GetCapabilities())
-      .Times(AtMost(1));
+      .Times(AtMost(1))
+       .WillOnce(Return(kDefaultTestCapability));
   EXPECT_CALL(*desktop_environment, SetCapabilities(_))
       .Times(AtMost(1));
 
@@ -232,6 +355,23 @@ void ClientSessionTest::ConnectClientSession() {
   client_session_->OnConnectionChannelsConnected(client_session_->connection());
 }
 
+void ClientSessionTest::SetSendMessageAndDisconnectExpectation(
+    const std::string& message_type) {
+  protocol::ExtensionMessage message;
+  message.set_type(message_type);
+  message.set_data("data");
+
+  Expectation authenticated =
+      EXPECT_CALL(session_event_handler_, OnSessionAuthenticated(_))
+      .WillOnce(Return(true));
+  EXPECT_CALL(session_event_handler_, OnSessionChannelsConnected(_))
+      .After(authenticated)
+      .WillOnce(DoAll(
+          DeliverClientMessage(client_session_.get(), message),
+          InvokeWithoutArgs(this, &ClientSessionTest::DisconnectClientSession),
+          InvokeWithoutArgs(this, &ClientSessionTest::StopClientSession)));
+}
+
 void ClientSessionTest::QuitMainMessageLoop() {
   message_loop_.PostTask(FROM_HERE, base::MessageLoop::QuitClosure());
 }
@@ -599,4 +739,63 @@ TEST_F(ClientSessionTest, EnableGnubbyAuth) {
   message_loop_.Run();
 }
 
+// Verifies that messages can be handled by extensions.
+TEST_F(ClientSessionTest, ExtensionMessages_MessageHandled) {
+  FakeExtension extension1("ext1", "cap1");
+  FakeExtension extension2("ext2", "cap2");
+  FakeExtension extension3("ext3", "cap3");
+  HostExtensionList extensions;
+  extensions.push_back(&extension1);
+  extensions.push_back(&extension2);
+  extensions.push_back(&extension3);
+
+  EXPECT_CALL(session_event_handler_, OnSessionClientCapabilities(_))
+      .WillOnce(Invoke(CreateFunctor(&CreateExtensionSessions, extensions)));
+
+  SetSendMessageAndDisconnectExpectation("ext2");
+  ConnectClientSession();
+  message_loop_.Run();
+
+  EXPECT_FALSE(extension1.message_handled());
+  EXPECT_TRUE(extension2.message_handled());
+  EXPECT_FALSE(extension3.message_handled());
+}
+
+// Verifies that extension messages not handled by extensions don't result in a
+// crash.
+TEST_F(ClientSessionTest, ExtensionMessages_MessageNotHandled) {
+  FakeExtension extension1("ext1", "cap1");
+  HostExtensionList extensions;
+  extensions.push_back(&extension1);
+
+  EXPECT_CALL(session_event_handler_, OnSessionClientCapabilities(_))
+      .WillOnce(Invoke(CreateFunctor(&CreateExtensionSessions, extensions)));
+
+  SetSendMessageAndDisconnectExpectation("extX");
+  ConnectClientSession();
+  message_loop_.Run();
+
+  EXPECT_FALSE(extension1.message_handled());
+}
+
+TEST_F(ClientSessionTest, ReportCapabilities) {
+  Expectation authenticated =
+      EXPECT_CALL(session_event_handler_, OnSessionAuthenticated(_))
+      .WillOnce(DoAll(
+          AddHostCapabilities(client_session_.get(), "capX capZ"),
+          AddHostCapabilities(client_session_.get(), ""),
+          AddHostCapabilities(client_session_.get(), "capY"),
+          Return(true)));
+  EXPECT_CALL(client_stub_,
+              SetCapabilities(EqCapabilities("capX capY capZ default")));
+  EXPECT_CALL(session_event_handler_, OnSessionChannelsConnected(_))
+      .After(authenticated)
+      .WillOnce(DoAll(
+          InvokeWithoutArgs(this, &ClientSessionTest::DisconnectClientSession),
+          InvokeWithoutArgs(this, &ClientSessionTest::StopClientSession)));
+
+  ConnectClientSession();
+  message_loop_.Run();
+}
+
 }  // namespace remoting