Accept inbound connections on unix domain socket

mojo/shell/external_application_listener_unittest.cc

Index: mojo/shell/external_application_listener_unittest.cc
diff --git a/mojo/shell/external_application_listener_unittest.cc b/mojo/shell/external_application_listener_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..b7e2fa4cf9d176d477b3f34dab82be5ce2d2f5d8
--- /dev/null
+++ b/mojo/shell/external_application_listener_unittest.cc
@@ -0,0 +1,228 @@
+// Copyright 2014 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 "base/files/file_path.h"
+#include "base/files/file_util.h"
+#include "base/files/scoped_temp_dir.h"
+#include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
+#include "base/threading/thread.h"
+#include "mojo/application_manager/application_manager.h"
+#include "mojo/common/common_type_converters.h"
+#include "mojo/public/interfaces/application/application.mojom.h"
+#include "mojo/public/interfaces/application/service_provider.mojom.h"
+#include "mojo/public/interfaces/application/shell.mojom.h"
+#include "mojo/shell/external_application_listener_posix.h"
+#include "mojo/shell/external_application_registrar.mojom.h"
+#include "mojo/shell/external_application_registrar_connection.h"
+#include "net/base/net_errors.h"
+#include "net/base/test_completion_callback.h"
+#include "net/socket/unix_domain_client_socket_posix.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "url/gurl.h"
+
+namespace mojo {
+namespace shell {
+
+class ExternalApplicationListenerTest : public testing::Test {
+ public:
+  ExternalApplicationListenerTest() : io_thread_("io thread") {}
+  virtual ~ExternalApplicationListenerTest() {}
+
+  virtual void SetUp() OVERRIDE {
+    base::Thread::Options options;
+    options.message_loop_type = base::MessageLoop::TYPE_IO;
+    io_thread_.StartWithOptions(options);
+
+    listener_.reset(new ExternalApplicationListenerPosix(
+        loop_.task_runner(), io_thread_.task_runner()));
+    ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
+    socket_path_ = temp_dir_.path().Append(FILE_PATH_LITERAL("socket"));
+  }
+
+ protected:
+  base::MessageLoop loop_;
+  base::RunLoop run_loop_;
+  base::Thread io_thread_;
+
+  base::ScopedTempDir temp_dir_;
+  ApplicationManager application_manager_;
+  base::FilePath socket_path_;
+  scoped_ptr<ExternalApplicationListener> listener_;
+};
+
+namespace {
+class StubShellImpl : public InterfaceImpl<Shell> {
+ private:
+  virtual void ConnectToApplication(
+      const String& requestor_url,
+      InterfaceRequest<ServiceProvider> in_service_provider) MOJO_OVERRIDE {
+    ServiceProviderPtr out_service_provider;
+    out_service_provider.Bind(in_service_provider.PassMessagePipe());
+    client()->AcceptConnection(requestor_url, out_service_provider.Pass());
+  }
+};
+
+void DoLocalRegister(const GURL& app_url, ScopedMessagePipeHandle shell) {
+  BindToPipe(new StubShellImpl, shell.Pass());
+}
+
+void QuitLoopOnConnect(scoped_refptr<base::TaskRunner> loop,
+                       base::Closure quit_callback,
+                       int rv) {
+  EXPECT_EQ(net::OK, rv);
+  loop->PostTask(FROM_HERE, quit_callback);
+}
+
+void ConnectOnIOThread(const base::FilePath& socket_path,
+                       scoped_refptr<base::TaskRunner> to_quit,
+                       base::Closure quit_callback) {
+  ExternalApplicationRegistrarConnection connection(socket_path);
+  connection.Connect(base::Bind(&QuitLoopOnConnect, to_quit, quit_callback));
+}
+}  // namespace
+
+TEST_F(ExternalApplicationListenerTest, ConnectConnection) {
+  listener_->ListenInBackground(socket_path_, base::Bind(&DoLocalRegister));
+  listener_->WaitForListening();
+  io_thread_.task_runner()->PostTask(FROM_HERE,
+                                     base::Bind(&ConnectOnIOThread,
+                                                socket_path_,
+                                                loop_.task_runner(),
+                                                run_loop_.QuitClosure()));
+  run_loop_.Run();
+}
+
+namespace {
+class QuitLoopOnConnectApplicationImpl : public InterfaceImpl<Application> {
+ public:
+  QuitLoopOnConnectApplicationImpl(const std::string& url,
+                                   scoped_refptr<base::TaskRunner> loop,
+                                   base::Closure quit_callback)
+      : url_(url), to_quit_(loop), quit_callback_(quit_callback) {}
+
+ private:
+  virtual void Initialize(Array<String> args) MOJO_OVERRIDE {}
+
+  virtual void AcceptConnection(const String& requestor_url,
+                                ServiceProviderPtr p) MOJO_OVERRIDE {
+    DVLOG(1) << url_ << " accepting connection from " << requestor_url;
+    to_quit_->PostTask(FROM_HERE, quit_callback_);
+  }
+
+  const std::string url_;
+  scoped_refptr<base::TaskRunner> to_quit_;
+  base::Closure quit_callback_;
+};
+
+class FakeExternalApplication {
+ public:
+  FakeExternalApplication(const std::string& url) : url_(url) {}
+
+  void ConnectSynchronously(const base::FilePath& socket_path) {
+    connection_.reset(new ExternalApplicationRegistrarConnection(socket_path));
+    net::TestCompletionCallback connect_callback;
+    connection_->Connect(connect_callback.callback());
+    connect_callback.WaitForResult();
+  }
+
+  // application_impl is the the actual implementation to be registered.
+  void Register(scoped_ptr<InterfaceImpl<Application>> application_impl,
+                base::Closure register_complete_callback) {
+    connection_->Register(GURL(url_), &ptr_, register_complete_callback);
+    application_impl_ = application_impl.Pass();
+    ptr_.set_client(application_impl_.get());
+  }
+
+  void ConnectToAppByUrl(std::string app_url) {
+    ServiceProviderPtr sp;
+    ptr_->ConnectToApplication(app_url, Get(&sp));
+  }
+
+  const std::string& url() { return url_; }
+
+ private:
+  const std::string url_;
+  scoped_ptr<InterfaceImpl<Application>> application_impl_;
+  ShellPtr ptr_;
+
+  scoped_ptr<ExternalApplicationRegistrarConnection> connection_;
+};
+
+void ConnectToApp(FakeExternalApplication* connector,
+                  FakeExternalApplication* connectee) {
+  connector->ConnectToAppByUrl(connectee->url());
+}
+
+void NoOp() {
+}
+
+void ConnectAndRegisterOnIOThread(const base::FilePath& socket_path,
+                                  scoped_refptr<base::TaskRunner> loop,
+                                  base::Closure quit_callback,
+                                  FakeExternalApplication* connector,
+                                  FakeExternalApplication* connectee) {
+  // Connect the first app to the registrar.
+  connector->ConnectSynchronously(socket_path);
+  // connector will use this implementation of the Mojo Application interface
+  // once registration complete.
+  scoped_ptr<QuitLoopOnConnectApplicationImpl> connector_app_impl(
+      new QuitLoopOnConnectApplicationImpl(
+          connector->url(), loop, quit_callback));
+  // Since connectee won't be ready when connector is done registering, pass
+  // in a do-nothing callback.
+  connector->Register(connector_app_impl.PassAs<InterfaceImpl<Application>>(),
+                      base::Bind(&NoOp));
+
+  // Connect the second app to the registrar.
+  connectee->ConnectSynchronously(socket_path);
+  scoped_ptr<QuitLoopOnConnectApplicationImpl> connectee_app_impl(
+      new QuitLoopOnConnectApplicationImpl(
+          connectee->url(), loop, quit_callback));
+  // After connectee is successfully registered, connector should be
+  // able to connect to is by URL. Pass in a callback to attempt the
+  // app -> app connection.
+  connectee->Register(connectee_app_impl.PassAs<InterfaceImpl<Application>>(),
+                      base::Bind(&ConnectToApp, connector, connectee));
+}
+
+void DestroyOnIOThread(scoped_ptr<FakeExternalApplication> doomed1,
+                       scoped_ptr<FakeExternalApplication> doomed2) {
+}
+}  // namespace
+
+// Create two external applications, have them discover and connect to
+// the registrar, and then have one app connect to the other by URL.
+TEST_F(ExternalApplicationListenerTest, ConnectTwoExternalApplications) {
+  listener_->ListenInBackground(
+      socket_path_,
+      base::Bind(&ApplicationManager::RegisterExternalApplication,
+                 base::Unretained(&application_manager_)));
+  listener_->WaitForListening();
+
+  // Create two external apps.
+  scoped_ptr<FakeExternalApplication> supersweet_app(
+      new FakeExternalApplication("http://my.supersweet.app"));
+  scoped_ptr<FakeExternalApplication> awesome_app(
+      new FakeExternalApplication("http://my.awesome.app"));
+
+  // Connecting and talking to the registrar has to happen on the IO thread.
+  io_thread_.task_runner()->PostTask(FROM_HERE,
+                                     base::Bind(&ConnectAndRegisterOnIOThread,
+                                                socket_path_,
+                                                loop_.task_runner(),
+                                                run_loop_.QuitClosure(),
+                                                supersweet_app.get(),
+                                                awesome_app.get()));
+  run_loop_.Run();
+
+  // The apps need to be destroyed on the thread where they did socket stuff.
+  io_thread_.task_runner()->PostTask(FROM_HERE,
+                                     base::Bind(&DestroyOnIOThread,
+                                                base::Passed(&supersweet_app),
+                                                base::Passed(&awesome_app)));
+}
+
+}  // namespace shell
+}  // namespace mojo