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#include "renderer/renderer_server.h"

#include <memory>
#include <string>

#include "base/logging.h"
#include "base/port.h"
#include "base/system_util.h"
#include "base/util.h"
#include "ipc/ipc_test_util.h"
#include "protocol/renderer_command.pb.h"
#include "renderer/renderer_client.h"
#include "renderer/renderer_interface.h"
#include "testing/base/public/googletest.h"
#include "testing/base/public/gunit.h"
#include "absl/flags/flag.h"

namespace mozc {
namespace renderer {
namespace {

class TestRenderer : public RendererInterface {
 public:
  TestRenderer() : counter_(0), finished_(false) {}

  bool Activate() override { return true; }

  bool IsAvailable() const override { return true; }

  bool ExecCommand(const commands::RendererCommand &command) override {
    if (finished_) {
      return false;
    }
    counter_++;
    return true;
  }

  void Reset() { counter_ = 0; }

  int counter() const { return counter_; }

  void Shutdown() { finished_ = true; }

 private:
  int counter_;
  bool finished_;
};

class TestRendererServer : public RendererServer {
 public:
  TestRendererServer() {}

  ~TestRendererServer() override {}

  int StartMessageLoop() override { return 0; }

  // Not async for testing
  bool AsyncExecCommand(std::string *proto_message) override {
    commands::RendererCommand command;
    command.ParseFromString(*proto_message);
    delete proto_message;
    return ExecCommandInternal(command);
  }
};

// A renderer launcher which does nothing.
class DummyRendererLauncher : public RendererLauncherInterface {
 public:
  void StartRenderer(
      const std::string &name, const std::string &renderer_path,
      bool disable_renderer_path_check,
      IPCClientFactoryInterface *ipc_client_factory_interface) override {
    LOG(INFO) << name << " " << renderer_path;
  }

  bool ForceTerminateRenderer(const std::string &name) override { return true; }

  void OnFatal(RendererErrorType type) override {
    LOG(ERROR) << static_cast<int>(type);
  }

  bool IsAvailable() const override { return true; }

  bool CanConnect() const override { return true; }

  void SetPendingCommand(const commands::RendererCommand &command) override {}

  void set_suppress_error_dialog(bool suppress) override {}
};
}  // namespace

class RendererServerTest : public ::testing::Test {
 protected:
  void SetUp() override {
    SystemUtil::SetUserProfileDirectory(absl::GetFlag(FLAGS_test_tmpdir));
  }
};

TEST_F(RendererServerTest, IPCTest) {
  SystemUtil::SetUserProfileDirectory(absl::GetFlag(FLAGS_test_tmpdir));
  mozc::IPCClientFactoryOnMemory on_memory_client_factory;

  std::unique_ptr<TestRendererServer> server(new TestRendererServer);
  TestRenderer renderer;
  server->SetRendererInterface(&renderer);
#ifdef __APPLE__
  server->SetMachPortManager(on_memory_client_factory.OnMemoryPortManager());
#endif
  renderer.Reset();

  // listning event
  server->StartServer();
  Util::Sleep(1000);

  DummyRendererLauncher launcher;
  RendererClient client;
  client.SetIPCClientFactory(&on_memory_client_factory);
  client.DisableRendererServerCheck();
  client.SetRendererLauncherInterface(&launcher);
  commands::RendererCommand command;
  command.set_type(commands::RendererCommand::NOOP);

  // renderer is called via IPC
  client.ExecCommand(command);
  EXPECT_EQ(1, renderer.counter());

  client.ExecCommand(command);
  client.ExecCommand(command);
  client.ExecCommand(command);
  EXPECT_EQ(4, renderer.counter());

  // Gracefully shutdown the server.
  renderer.Shutdown();
  client.ExecCommand(command);
  server->Wait();
}

}  // namespace renderer
}  // namespace mozc
