DBus MediaAnalyticsClient and media_perception pb.

chromeos/dbus/fake_media_analytics_client.h

+// Copyright 2017 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.
+
+#ifndef CHROMEOS_DBUS_FAKE_MEDIA_ANALYTICS_CLIENT_H_
+#define CHROMEOS_DBUS_FAKE_MEDIA_ANALYTICS_CLIENT_H_
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "chromeos/chromeos_export.h"
+#include "chromeos/dbus/media_analytics_client.h"
+#include "chromeos/media_perception/media_perception.pb.h"
+
+namespace chromeos {
+
+// MediaAnalyticsClient is used to communicate with a media analytics process
+// running outside of Chrome. The FakeMediaAnalyticsClient is used for
+// integration testing the MediaPerceptionPrivate API without any requirement on
+// D-Bus communications to an external process.

[tbarzic, 2017/05/09 20:28:41]

Drop the part about testing - this is used more widely than that (e.g. on Linux
Chrome OS builds)

[Luke Sorenson, 2017/05/09 22:21:25]

Done.

+class CHROMEOS_EXPORT FakeMediaAnalyticsClient : public MediaAnalyticsClient {
+ public:
+  FakeMediaAnalyticsClient();
+  ~FakeMediaAnalyticsClient() override;
+
+  // Inherited from MediaAnalyticsClient.
+  void GetState(const StateCallback& callback) override;
+  void SetState(const mri::State& state,
+                const StateCallback& callback) override;
+
+  void SetMediaPerceptionSignalHandler(
+      const MediaPerceptionSignalHandler& handler) override;
+  void ClearMediaPerceptionSignalHandler() override;
+
+  void GetDiagnostics(const DiagnosticsCallback& callback) override;
+
+  // Inherited from DBusClient.
+  void Init(dbus::Bus* bus) override;
+
+ private:
+  // Simply echoes back the previously set state.
+  void OnState(const StateCallback& callback);
+
+  // Returns a fake, nearly empty serialized Diagnostic proto.
+  void OnGetDiagnostics(const DiagnosticsCallback& callback);
+
+  // Returns a fake, nearly empty serialized MediaPerception proto.
+  void OnMediaPerception();
+
+  // Stores a handler for receiving MediaPerception proto messages.
+  MediaPerceptionSignalHandler media_perception_signal_handler_;
+
+  // Stores a fake current state for the media analytics process.
+  mri::State current_state_;
+
+  base::WeakPtrFactory<FakeMediaAnalyticsClient> weak_ptr_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(FakeMediaAnalyticsClient);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROMEOS_DBUS_FAKE_MEDIA_ANALYTICS_CLIENT_H_