text: // Copyright (c) 2012 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 "dbus/test_service.h"
  
  #include <stdint.h>
  #include <string>
  #include <utility>
  #include <vector>
  
  #include "base/bind.h"
  #include "base/callback_helpers.h"
  #include "base/guid.h"
  #include "base/logging.h"
  #include "base/message_loop/message_pump_type.h"
  #include "base/run_loop.h"
  #include "base/single_thread_task_runner.h"
  #include "base/test/test_timeouts.h"
  #include "base/threading/platform_thread.h"
  #include "dbus/bus.h"
  #include "dbus/exported_object.h"
  #include "dbus/message.h"
  #include "dbus/object_manager.h"
  #include "dbus/object_path.h"
  #include "dbus/property.h"
  
  namespace dbus {
  
  // Echo, SlowEcho, AsyncEcho, BrokenMethod, GetAll, Get, Set, PerformAction,
  // GetManagedObjects
  const int TestService::kNumMethodsToExport = 9;
  
  TestService::Options::Options()
      : request_ownership_options(Bus::REQUIRE_PRIMARY) {
  }
  
  TestService::Options::~Options() = default;
  
  TestService::TestService(const Options& options)
      : base::Thread("TestService"),
        service_name_(options.service_name),
        request_ownership_options_(options.request_ownership_options),
        dbus_task_runner_(options.dbus_task_runner),
        on_name_obtained_(base::WaitableEvent::ResetPolicy::AUTOMATIC,
                          base::WaitableEvent::InitialState::NOT_SIGNALED),
        num_exported_methods_(0),
        send_immediate_properties_changed_(false),
        has_ownership_(false),
        exported_object_(nullptr),
        exported_object_manager_(nullptr) {
    if (service_name_.empty()) {
      service_name_ = "org.chromium.TestService-" + base::GenerateGUID();
    }
  }
  
  TestService::~TestService() {
    Stop();
  }
  
  bool TestService::StartService() {
    base::Thread::Options thread_options;
    thread_options.message_pump_type = base::MessagePumpType::IO;
    return StartWithOptions(std::move(thread_options));
  }
  
  void TestService::WaitUntilServiceIsStarted() {
    // Wait until the ownership of the service name is obtained.
    on_name_obtained_.Wait();
  }
  
  void TestService::ShutdownAndBlock() {
    task_runner()->PostTask(FROM_HERE,
                            base::BindOnce(&TestService::ShutdownAndBlockInternal,
                                           base::Unretained(this)));
  }
  
  bool TestService::HasDBusThread() {
    return bus_->HasDBusThread();
  }
  
  void TestService::ShutdownAndBlockInternal() {
    if (HasDBusThread())
      bus_->ShutdownOnDBusThreadAndBlock();
    else
      bus_->ShutdownAndBlock();
  }
  
  void TestService::SendTestSignal(const std::string& message) {
    task_runner()->PostTask(FROM_HERE,
                            base::BindOnce(&TestService::SendTestSignalInternal,
                                           base::Unretained(this), message));
  }
  
  void TestService::SendTestSignalFromRoot(const std::string& message) {
    task_runner()->PostTask(
        FROM_HERE, base::BindOnce(&TestService::SendTestSignalFromRootInternal,
                                  base::Unretained(this), message));
  }
  
  void TestService::SendTestSignalInternal(const std::string& message) {
    Signal signal("org.chromium.TestInterface", "Test");
    MessageWriter writer(&signal);
    writer.AppendString(message);
    exported_object_->SendSignal(&signal);
  }
  
  void TestService::SendTestSignalFromRootInternal(const std::string& message) {
    Signal signal("org.chromium.TestInterface", "Test");
    MessageWriter writer(&signal);
    writer.AppendString(message);
  
    bus_->RequestOwnership(
        service_name_, request_ownership_options_,
        base::BindOnce(&TestService::OnOwnership, base::Unretained(this),
                       base::DoNothing::Once<bool>()));
  
    // Use "/" just like dbus-send does.
    ExportedObject* root_object = bus_->GetExportedObject(ObjectPath("/"));
    root_object->SendSignal(&signal);
  }
  
  void TestService::RequestOwnership(base::OnceCallback<void(bool)> callback) {
    task_runner()->PostTask(
        FROM_HERE, base::BindOnce(&TestService::RequestOwnershipInternal,
                                  base::Unretained(this), std::move(callback)));
  }
  
  void TestService::RequestOwnershipInternal(
      base::OnceCallback<void(bool)> callback) {
    bus_->RequestOwnership(
        service_name_, request_ownership_options_,
        base::BindOnce(&TestService::OnOwnership, base::Unretained(this),
                       std::move(callback)));
  }
  
  void TestService::OnOwnership(base::OnceCallback<void(bool)> callback,
                                const std::string& service_name,
                                bool success) {
    has_ownership_ = success;
    LOG_IF(ERROR, !success) << "Failed to own: " << service_name;
    std::move(callback).Run(success);
  
    on_name_obtained_.Signal();
  }
  
  void TestService::ReleaseOwnership(base::OnceClosure callback) {
    bus_->GetDBusTaskRunner()->PostTask(
        FROM_HERE, base::BindOnce(&TestService::ReleaseOwnershipInternal,
                                  base::Unretained(this), std::move(callback)));
  }
  
  void TestService::ReleaseOwnershipInternal(base::OnceClosure callback) {
    bus_->ReleaseOwnership(service_name_);
    has_ownership_ = false;
  
    bus_->GetOriginTaskRunner()->PostTask(FROM_HERE, std::move(callback));
  }
  
  void TestService::SetSendImmediatePropertiesChanged() {
    send_immediate_properties_changed_ = true;
  }
  
  void TestService::OnExported(const std::string& interface_name,
                               const std::string& method_name,
                               bool success) {
    if (!success) {
      LOG(ERROR) << "Failed to export: " << interface_name << "."
                 << method_name;
      // Returning here will make WaitUntilServiceIsStarted() to time out
      // and return false.
      return;
    }
  
    ++num_exported_methods_;
    if (num_exported_methods_ == kNumMethodsToExport) {
      // As documented in exported_object.h, the service name should be
      // requested after all methods are exposed.
      bus_->RequestOwnership(
          service_name_, request_ownership_options_,
          base::BindOnce(&TestService::OnOwnership, base::Unretained(this),
                         base::DoNothing::Once<bool>()));
    }
  }
  
  void TestService::Run(base::RunLoop* run_loop) {
    Bus::Options bus_options;
    bus_options.bus_type = Bus::SESSION;
    bus_options.connection_type = Bus::PRIVATE;
    bus_options.dbus_task_runner = dbus_task_runner_;
    bus_ = new Bus(bus_options);
  
    exported_object_ = bus_->GetExportedObject(
        ObjectPath("/org/chromium/TestObject"));
  
    int num_methods = 0;
    exported_object_->ExportMethod(
        "org.chromium.TestInterface", "Echo",
        base::BindRepeating(&TestService::Echo, base::Unretained(this)),
        base::BindOnce(&TestService::OnExported, base::Unretained(this)));
    ++num_methods;
  
    exported_object_->ExportMethod(
        "org.chromium.TestInterface", "SlowEcho",
        base::BindRepeating(&TestService::SlowEcho, base::Unretained(this)),
        base::BindOnce(&TestService::OnExported, base::Unretained(this)));
    ++num_methods;
  
    exported_object_->ExportMethod(
        "org.chromium.TestInterface", "AsyncEcho",
        base::BindRepeating(&TestService::AsyncEcho, base::Unretained(this)),
        base::BindOnce(&TestService::OnExported, base::Unretained(this)));
    ++num_methods;
  
    exported_object_->ExportMethod(
        "org.chromium.TestInterface", "BrokenMethod",
        base::BindRepeating(&TestService::BrokenMethod, base::Unretained(this)),
        base::BindOnce(&TestService::OnExported, base::Unretained(this)));
    ++num_methods;
  
    exported_object_->ExportMethod(
        "org.chromium.TestInterface", "PerformAction",
        base::BindRepeating(&TestService::PerformAction, base::Unretained(this)),
        base::BindOnce(&TestService::OnExported, base::Unretained(this)));
    ++num_methods;
  
    exported_object_->ExportMethod(
        kPropertiesInterface, kPropertiesGetAll,
        base::BindRepeating(&TestService::GetAllProperties,
                            base::Unretained(this)),
        base::BindOnce(&TestService::OnExported, base::Unretained(this)));
    ++num_methods;
  
    exported_object_->ExportMethod(
        kPropertiesInterface, kPropertiesGet,
        base::BindRepeating(&TestService::GetProperty, base::Unretained(this)),
        base::BindOnce(&TestService::OnExported, base::Unretained(this)));
    ++num_methods;
  
    exported_object_->ExportMethod(
        kPropertiesInterface, kPropertiesSet,
        base::BindRepeating(&TestService::SetProperty, base::Unretained(this)),
        base::BindOnce(&TestService::OnExported, base::Unretained(this)));
    ++num_methods;
  
    exported_object_manager_ = bus_->GetExportedObject(
        ObjectPath("/org/chromium/TestService"));
  
    exported_object_manager_->ExportMethod(
        kObjectManagerInterface, kObjectManagerGetManagedObjects,
        base::BindRepeating(&TestService::GetManagedObjects,
                            base::Unretained(this)),
        base::BindOnce(&TestService::OnExported, base::Unretained(this)));
    ++num_methods;
  
    // Just print an error message as we don't want to crash tests.
    // Tests will fail at a call to WaitUntilServiceIsStarted().
    if (num_methods != kNumMethodsToExport) {
      LOG(ERROR) << "The number of methods does not match";
    }
    run_loop->Run();
  }
  
  void TestService::Echo(MethodCall* method_call,
                         ExportedObject::ResponseSender response_sender) {
    MessageReader reader(method_call);
    std::string text_message;
    if (!reader.PopString(&text_message)) {
      std::move(response_sender).Run(std::unique_ptr<Response>());
      return;
    }
  
    std::unique_ptr<Response> response = Response::FromMethodCall(method_call);
    MessageWriter writer(response.get());
    writer.AppendString(text_message);
    std::move(response_sender).Run(std::move(response));
  }
  
  void TestService::SlowEcho(MethodCall* method_call,
                             ExportedObject::ResponseSender response_sender) {
    base::PlatformThread::Sleep(TestTimeouts::tiny_timeout());
    Echo(method_call, std::move(response_sender));
  }
  
  void TestService::AsyncEcho(MethodCall* method_call,
                              ExportedObject::ResponseSender response_sender) {
    // Schedule a call to Echo() to send an asynchronous response after we return.
    task_runner()->PostDelayedTask(
        FROM_HERE,
        base::BindOnce(&TestService::Echo, base::Unretained(this), method_call,
                       std::move(response_sender)),
        TestTimeouts::tiny_timeout());
  }
  
  void TestService::BrokenMethod(MethodCall* method_call,
                                 ExportedObject::ResponseSender response_sender) {
    std::move(response_sender).Run(std::unique_ptr<Response>());
  }
  
  
  void TestService::GetAllProperties(
      MethodCall* method_call,
      ExportedObject::ResponseSender response_sender) {
    MessageReader reader(method_call);
    std::string interface;
    if (!reader.PopString(&interface)) {
      std::move(response_sender).Run(std::unique_ptr<Response>());
      return;
    }
  
    std::unique_ptr<Response> response = Response::FromMethodCall(method_call);
    MessageWriter writer(response.get());
  
    AddPropertiesToWriter(&writer);
  
    std::move(response_sender).Run(std::move(response));
  }
  
  void TestService::GetProperty(MethodCall* method_call,
                                ExportedObject::ResponseSender response_sender) {
    MessageReader reader(method_call);
    std::string interface;
    if (!reader.PopString(&interface)) {
      std::move(response_sender).Run(std::unique_ptr<Response>());
      return;
    }
  
    std::string name;
    if (!reader.PopString(&name)) {
      std::move(response_sender).Run(std::unique_ptr<Response>());
      return;
    }
  
    if (name == "Name") {
      // Return the previous value for the "Name" property:
      // Variant<"TestService">
      std::unique_ptr<Response> response = Response::FromMethodCall(method_call);
      MessageWriter writer(response.get());
  
      writer.AppendVariantOfString("TestService");
  
      std::move(response_sender).Run(std::move(response));
    } else if (name == "Version") {
      // Return a new value for the "Version" property:
      // Variant<20>
      std::unique_ptr<Response> response = Response::FromMethodCall(method_call);
      MessageWriter writer(response.get());
  
      writer.AppendVariantOfInt16(20);
  
      std::move(response_sender).Run(std::move(response));
    } else if (name == "Methods") {
      // Return the previous value for the "Methods" property:
      // Variant<["Echo", "SlowEcho", "AsyncEcho", "BrokenMethod"]>
      std::unique_ptr<Response> response = Response::FromMethodCall(method_call);
      MessageWriter writer(response.get());
      MessageWriter variant_writer(nullptr);
      MessageWriter variant_array_writer(nullptr);
  
      writer.OpenVariant("as", &variant_writer);
      variant_writer.OpenArray("s", &variant_array_writer);
      variant_array_writer.AppendString("Echo");
      variant_array_writer.AppendString("SlowEcho");
      variant_array_writer.AppendString("AsyncEcho");
      variant_array_writer.AppendString("BrokenMethod");
      variant_writer.CloseContainer(&variant_array_writer);
      writer.CloseContainer(&variant_writer);
  
      std::move(response_sender).Run(std::move(response));
    } else if (name == "Objects") {
      // Return the previous value for the "Objects" property:
      // Variant<[objectpath:"/TestObjectPath"]>
      std::unique_ptr<Response> response = Response::FromMethodCall(method_call);
      MessageWriter writer(response.get());
      MessageWriter variant_writer(nullptr);
      MessageWriter variant_array_writer(nullptr);
  
      writer.OpenVariant("ao", &variant_writer);
      variant_writer.OpenArray("o", &variant_array_writer);
      variant_array_writer.AppendObjectPath(ObjectPath("/TestObjectPath"));
      variant_writer.CloseContainer(&variant_array_writer);
      writer.CloseContainer(&variant_writer);
  
      std::move(response_sender).Run(std::move(response));
    } else if (name == "Bytes") {
      // Return the previous value for the "Bytes" property:
      // Variant<[0x54, 0x65, 0x73, 0x74]>
      std::unique_ptr<Response> response = Response::FromMethodCall(method_call);
      MessageWriter writer(response.get());
      MessageWriter variant_writer(nullptr);
      MessageWriter variant_array_writer(nullptr);
  
      writer.OpenVariant("ay", &variant_writer);
      const uint8_t bytes[] = {0x54, 0x65, 0x73, 0x74};
      variant_writer.AppendArrayOfBytes(bytes, sizeof(bytes));
      writer.CloseContainer(&variant_writer);
  
      std::move(response_sender).Run(std::move(response));
    } else {
      // Return error.
      std::move(response_sender).Run(std::unique_ptr<Response>());
      return;
    }
  }
  
  void TestService::SetProperty(MethodCall* method_call,
                                ExportedObject::ResponseSender response_sender) {
    MessageReader reader(method_call);
    std::string interface;
    if (!reader.PopString(&interface)) {
      std::move(response_sender).Run(std::unique_ptr<Response>());
      return;
    }
  
    std::string name;
    if (!reader.PopString(&name)) {
      std::move(response_sender).Run(std::unique_ptr<Response>());
      return;
    }
  
    if (name != "Name") {
      std::move(response_sender).Run(std::unique_ptr<Response>());
      return;
    }
  
    std::string value;
    if (!reader.PopVariantOfString(&value)) {
      std::move(response_sender).Run(std::unique_ptr<Response>());
      return;
    }
  
    SendPropertyChangedSignal(value);
  
    std::move(response_sender).Run(Response::FromMethodCall(method_call));
  }
  
  void TestService::PerformAction(
        MethodCall* method_call,
        ExportedObject::ResponseSender response_sender) {
    MessageReader reader(method_call);
    std::string action;
    ObjectPath object_path;
    if (!reader.PopString(&action) || !reader.PopObjectPath(&object_path)) {
      std::move(response_sender).Run(std::unique_ptr<Response>());
      return;
    }
  
    if (action == "AddObject") {
      AddObject(object_path);
    } else if (action == "RemoveObject") {
      RemoveObject(object_path);
    } else if (action == "SetSendImmediatePropertiesChanged") {
      SetSendImmediatePropertiesChanged();
    } else if (action == "ReleaseOwnership") {
      ReleaseOwnership(base::BindOnce(&TestService::PerformActionResponse,
                                      base::Unretained(this), method_call,
                                      std::move(response_sender)));
      return;
    } else if (action == "Ownership") {
      ReleaseOwnership(base::BindOnce(&TestService::OwnershipReleased,
                                      base::Unretained(this), method_call,
                                      std::move(response_sender)));
      return;
    } else if (action == "InvalidateProperty") {
      SendPropertyInvalidatedSignal();
    }
  
    std::unique_ptr<Response> response = Response::FromMethodCall(method_call);
    std::move(response_sender).Run(std::move(response));
  }
  
  void TestService::PerformActionResponse(
      MethodCall* method_call,
      ExportedObject::ResponseSender response_sender) {
    std::unique_ptr<Response> response = Response::FromMethodCall(method_call);
    std::move(response_sender).Run(std::move(response));
  }
  
  void TestService::OwnershipReleased(
      MethodCall* method_call,
      ExportedObject::ResponseSender response_sender) {
    RequestOwnership(base::BindOnce(&TestService::OwnershipRegained,
                                    base::Unretained(this), method_call,
                                    std::move(response_sender)));
  }
  
  
  void TestService::OwnershipRegained(
      MethodCall* method_call,
      ExportedObject::ResponseSender response_sender,
      bool success) {
    PerformActionResponse(method_call, std::move(response_sender));
  }
  
  
  void TestService::GetManagedObjects(
      MethodCall* method_call,
      ExportedObject::ResponseSender response_sender) {
    std::unique_ptr<Response> response = Response::FromMethodCall(method_call);
    MessageWriter writer(response.get());
  
    // The managed objects response is a dictionary of object paths identifying
    // the object(s) with a dictionary of strings identifying the interface(s)
    // they implement and then a dictionary of property values.
    //
    // Thus this looks something like:
    //
    // {
    //   "/org/chromium/TestObject": {
    //     "org.chromium.TestInterface": { /* Properties */ }
    //   }
    // }
  
  
    MessageWriter array_writer(nullptr);
    MessageWriter dict_entry_writer(nullptr);
    MessageWriter object_array_writer(nullptr);
    MessageWriter object_dict_entry_writer(nullptr);
  
    writer.OpenArray("{oa{sa{sv}}}", &array_writer);
  
    array_writer.OpenDictEntry(&dict_entry_writer);
    dict_entry_writer.AppendObjectPath(ObjectPath("/org/chromium/TestObject"));
    dict_entry_writer.OpenArray("{sa{sv}}", &object_array_writer);
  
    object_array_writer.OpenDictEntry(&object_dict_entry_writer);
    object_dict_entry_writer.AppendString("org.chromium.TestInterface");
    AddPropertiesToWriter(&object_dict_entry_writer);
    object_array_writer.CloseContainer(&object_dict_entry_writer);
  
    dict_entry_writer.CloseContainer(&object_array_writer);
  
    array_writer.CloseContainer(&dict_entry_writer);
    writer.CloseContainer(&array_writer);
  
    std::move(response_sender).Run(std::move(response));
  
    if (send_immediate_properties_changed_)
      SendPropertyChangedSignal("ChangedTestServiceName");
  }
  
  void TestService::AddPropertiesToWriter(MessageWriter* writer) {
    // The properties response is a dictionary of strings identifying the
    // property and a variant containing the property value. We return all
    // of the properties, thus the response is:
    //
    // {
    //   "Name": Variant<"TestService">,
    //   "Version": Variant<10>,
    //   "Methods": Variant<["Echo", "SlowEcho", "AsyncEcho", "BrokenMethod"]>,
    //   "Objects": Variant<[objectpath:"/TestObjectPath"]>
    //   "Bytes": Variant<[0x54, 0x65, 0x73, 0x74]>
    // }
  
    MessageWriter array_writer(nullptr);
    MessageWriter dict_entry_writer(nullptr);
    MessageWriter variant_writer(nullptr);
    MessageWriter variant_array_writer(nullptr);
  
    writer->OpenArray("{sv}", &array_writer);
  
    array_writer.OpenDictEntry(&dict_entry_writer);
    dict_entry_writer.AppendString("Name");
    dict_entry_writer.AppendVariantOfString("TestService");
    array_writer.CloseContainer(&dict_entry_writer);
  
    array_writer.OpenDictEntry(&dict_entry_writer);
    dict_entry_writer.AppendString("Version");
    dict_entry_writer.AppendVariantOfInt16(10);
    array_writer.CloseContainer(&dict_entry_writer);
  
    array_writer.OpenDictEntry(&dict_entry_writer);
    dict_entry_writer.AppendString("Methods");
    dict_entry_writer.OpenVariant("as", &variant_writer);
    variant_writer.OpenArray("s", &variant_array_writer);
    variant_array_writer.AppendString("Echo");
    variant_array_writer.AppendString("SlowEcho");
    variant_array_writer.AppendString("AsyncEcho");
    variant_array_writer.AppendString("BrokenMethod");
    variant_writer.CloseContainer(&variant_array_writer);
    dict_entry_writer.CloseContainer(&variant_writer);
    array_writer.CloseContainer(&dict_entry_writer);
  
    array_writer.OpenDictEntry(&dict_entry_writer);
    dict_entry_writer.AppendString("Objects");
    dict_entry_writer.OpenVariant("ao", &variant_writer);
    variant_writer.OpenArray("o", &variant_array_writer);
    variant_array_writer.AppendObjectPath(ObjectPath("/TestObjectPath"));
    variant_writer.CloseContainer(&variant_array_writer);
    dict_entry_writer.CloseContainer(&variant_writer);
    array_writer.CloseContainer(&dict_entry_writer);
  
    array_writer.OpenDictEntry(&dict_entry_writer);
    dict_entry_writer.AppendString("Bytes");
    dict_entry_writer.OpenVariant("ay", &variant_writer);
    const uint8_t bytes[] = {0x54, 0x65, 0x73, 0x74};
    variant_writer.AppendArrayOfBytes(bytes, sizeof(bytes));
    dict_entry_writer.CloseContainer(&variant_writer);
    array_writer.CloseContainer(&dict_entry_writer);
  
    writer->CloseContainer(&array_writer);
  }
  
  void TestService::AddObject(const ObjectPath& object_path) {
    task_runner()->PostTask(FROM_HERE,
                            base::BindOnce(&TestService::AddObjectInternal,
                                           base::Unretained(this), object_path));
  }
  
  void TestService::AddObjectInternal(const ObjectPath& object_path) {
    Signal signal(kObjectManagerInterface, kObjectManagerInterfacesAdded);
    MessageWriter writer(&signal);
    writer.AppendObjectPath(object_path);
  
    MessageWriter array_writer(nullptr);
    MessageWriter dict_entry_writer(nullptr);
  
    writer.OpenArray("{sa{sv}}", &array_writer);
    array_writer.OpenDictEntry(&dict_entry_writer);
    dict_entry_writer.AppendString("org.chromium.TestInterface");
    AddPropertiesToWriter(&dict_entry_writer);
    array_writer.CloseContainer(&dict_entry_writer);
    writer.CloseContainer(&array_writer);
  
    exported_object_manager_->SendSignal(&signal);
  }
  
  void TestService::RemoveObject(const ObjectPath& object_path) {
    task_runner()->PostTask(FROM_HERE,
                            base::BindOnce(&TestService::RemoveObjectInternal,
                                           base::Unretained(this), object_path));
  }
  
  void TestService::RemoveObjectInternal(const ObjectPath& object_path) {
    Signal signal(kObjectManagerInterface, kObjectManagerInterfacesRemoved);
    MessageWriter writer(&signal);
  
    writer.AppendObjectPath(object_path);
  
    std::vector<std::string> interfaces;
    interfaces.push_back("org.chromium.TestInterface");
    writer.AppendArrayOfStrings(interfaces);
  
    exported_object_manager_->SendSignal(&signal);
  }
  
  void TestService::SendPropertyChangedSignal(const std::string& name) {
    task_runner()->PostTask(
        FROM_HERE, base::BindOnce(&TestService::SendPropertyChangedSignalInternal,
                                  base::Unretained(this), name));
  }
  
  void TestService::SendPropertyChangedSignalInternal(const std::string& name) {
    Signal signal(kPropertiesInterface, kPropertiesChanged);
    MessageWriter writer(&signal);
    writer.AppendString("org.chromium.TestInterface");
  
    MessageWriter array_writer(nullptr);
    MessageWriter dict_entry_writer(nullptr);
  
    writer.OpenArray("{sv}", &array_writer);
    array_writer.OpenDictEntry(&dict_entry_writer);
    dict_entry_writer.AppendString("Name");
    dict_entry_writer.AppendVariantOfString(name);
    array_writer.CloseContainer(&dict_entry_writer);
    writer.CloseContainer(&array_writer);
  
    MessageWriter invalidated_array_writer(nullptr);
  
    writer.OpenArray("s", &invalidated_array_writer);
    writer.CloseContainer(&invalidated_array_writer);
  
    exported_object_->SendSignal(&signal);
  }
  
  void TestService::SendPropertyInvalidatedSignal() {
    task_runner()->PostTask(
        FROM_HERE,
        base::BindOnce(&TestService::SendPropertyInvalidatedSignalInternal,
                       base::Unretained(this)));
  }
  
  void TestService::SendPropertyInvalidatedSignalInternal() {
    Signal signal(kPropertiesInterface, kPropertiesChanged);
    MessageWriter writer(&signal);
    writer.AppendString("org.chromium.TestInterface");
  
    MessageWriter array_writer(nullptr);
    MessageWriter dict_entry_writer(nullptr);
  
    writer.OpenArray("{sv}", &array_writer);
    writer.CloseContainer(&array_writer);
  
    MessageWriter invalidated_array_writer(nullptr);
  
    writer.OpenArray("s", &invalidated_array_writer);
    invalidated_array_writer.AppendString("Name");
    writer.CloseContainer(&invalidated_array_writer);
  
    exported_object_->SendSignal(&signal);
  }
  
  }  // namespace dbus
  